HID keyboard

Hi,

I have integrated HID mouse and keyboard, when my custom board was connected with computer, there is "hello" on notepad. But when I pushed "CapsLk" key, RTT viewer did not print "CAPS ON" or "CAPS OF".

SDK 17.02 on nRF52810

Here is main code.

/**
 * Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
/** @file
 *
 * @defgroup ble_sdk_app_hids_mouse_main main.c
 * @{
 * @ingroup ble_sdk_app_hids_mouse
 * @brief HID Mouse Sample Application main file.
 *
 * This file contains is the source code for a sample application using the HID, Battery and Device
 * Information Service for implementing a simple mouse functionality. This application uses the
 * @ref app_scheduler.
 *
 * Also it would accept pairing requests from any peer device. This implementation of the
 * application will not know whether a connected central is a known device or not.
 */

#include <stdint.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf.h"
#include "nrf_sdm.h"
#include "app_error.h"
#include "ble.h"
#include "ble_err.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_hids.h"
#include "ble_bas.h"
#include "ble_dis.h"
#include "ble_conn_params.h"
#include "sensorsim.h"
//#include "bsp_btn_ble.h"
#include "app_scheduler.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "app_timer.h"
#include "peer_manager.h"
#include "ble_advertising.h"
#include "fds.h"
#include "ble_conn_state.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "nrf_pwr_mgmt.h"
#include "peer_manager_handler.h"

#include "usr_io_def.h"
#include "usr_twi.h"
#include "m_hid_app.h"
#include "nrf_drv_saadc.h"
#include "usr_led.h"
#include "ble_dfu.h"

#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"

#define DEVICE_NAME                     "nRF5_Mouse"                                /**< Name of device. Will be included in the advertising data. */
#define MANUFACTURER_NAME               "NordicSemiconductor"                       /**< Manufacturer. Will be passed to Device Information Service. */

#define APP_BLE_OBSERVER_PRIO           3                                           /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */

#define BATTERY_LEVEL_MEAS_INTERVAL     APP_TIMER_TICKS(2000)                      /**< Battery level measurement interval (ticks). */
#define MIN_BATTERY_LEVEL               81                                          /**< Minimum simulated battery level. */
#define MAX_BATTERY_LEVEL               100                                         /**< Maximum simulated battery level. */
#define BATTERY_LEVEL_INCREMENT         1                                           /**< Increment between each simulated battery level measurement. */

#define PNP_ID_VENDOR_ID_SOURCE         0x02                                        /**< Vendor ID Source. */
#define PNP_ID_VENDOR_ID                0x1915                                      /**< Vendor ID. */
#define PNP_ID_PRODUCT_ID               0xEEEE                                      /**< Product ID. */
#define PNP_ID_PRODUCT_VERSION          0x0001                                      /**< Product Version. */

/*lint -emacro(524, MIN_CONN_INTERVAL) // Loss of precision */
#define MIN_CONN_INTERVAL               MSEC_TO_UNITS(7.5, UNIT_1_25_MS)            /**< Minimum connection interval (7.5 ms). */
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(15, UNIT_1_25_MS)             /**< Maximum connection interval (15 ms). */
#define SLAVE_LATENCY                   20                                          /**< Slave latency. */
#define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(3000, UNIT_10_MS)             /**< Connection supervisory timeout (3000 ms). */

#define FIRST_CONN_PARAMS_UPDATE_DELAY  APP_TIMER_TICKS(5000)                       /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY   APP_TIMER_TICKS(30000)                      /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAM_UPDATE_COUNT     3                                           /**< Number of attempts before giving up the connection parameter negotiation. */

#define SEC_PARAM_BOND                  1                                           /**< Perform bonding. */
#define SEC_PARAM_MITM                  0                                           /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC                  0                                           /**< LE Secure Connections not enabled. */
#define SEC_PARAM_KEYPRESS              0                                           /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES       BLE_GAP_IO_CAPS_NONE                        /**< No I/O capabilities. */
#define SEC_PARAM_OOB                   0                                           /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE          7                                           /**< Minimum encryption key size. */
#define SEC_PARAM_MAX_KEY_SIZE          16                                          /**< Maximum encryption key size. */

#define SWIFT_PAIR_SUPPORTED            1                                           /**< Swift Pair feature is supported. */
#if SWIFT_PAIR_SUPPORTED == 1
#define MICROSOFT_VENDOR_ID             0x0006                                      /**< Microsoft Vendor ID.*/
#define MICROSOFT_BEACON_ID             0x03                                        /**< Microsoft Beacon ID, used to indicate that Swift Pair feature is supported. */
#define MICROSOFT_BEACON_SUB_SCENARIO   0x00                                        /**< Microsoft Beacon Sub Scenario, used to indicate how the peripheral will pair using Swift Pair feature. */
#define RESERVED_RSSI_BYTE              0x80                                        /**< Reserved RSSI byte, used to maintain forwards and backwards compatibility. */
#endif

//ADC define
#define ADC_REF_VOLTAGE_IN_MILLIVOLTS   600                               /**< Reference voltage (in milli volts) used by ADC while doing conversion. */
#define ADC_PRE_SCALING_COMPENSATION    6                                 /**< The ADC is configured to use VDD with 1/3 prescaling as input. And hence the result of conversion is to be multiplied by 3 to get the actual value of the battery voltage.*/
#define DIODE_FWD_VOLT_DROP_MILLIVOLTS  0                               /**< Typical forward voltage drop of the diode . */
#define ADC_RES_10BIT                   1024                              /**< Maximum digital value for 10-bit ADC conversion. */
#define ADC_RESULT_IN_MILLI_VOLTS(ADC_VALUE)\
        ((((ADC_VALUE) * ADC_REF_VOLTAGE_IN_MILLIVOLTS) / ADC_RES_10BIT) * ADC_PRE_SCALING_COMPENSATION)

//HID MAP define
#define MOVEMENT_SPEED                  5                                           /**< Number of pixels by which the cursor is moved each time a button is pushed. */
#define INPUT_REPORT_COUNT              4                                           /**< Number of input reports in this application. */
#define INPUT_REP_BUTTONS_LEN           3                                           /**< Length of Mouse Input Report containing button data. */
#define INPUT_REP_MOVEMENT_LEN          3                                           /**< Length of Mouse Input Report containing movement data. */
#define INPUT_REP_MEDIA_PLAYER_LEN      1                                           /**< Length of Mouse Input Report containing media player data. */
#define INPUT_REP_BUTTONS_INDEX         0                                           /**< Index of Mouse Input Report containing button data. */
#define INPUT_REP_MOVEMENT_INDEX        1                                           /**< Index of Mouse Input Report containing movement data. */
#define INPUT_REP_MPLAYER_INDEX         2                                           /**< Index of Mouse Input Report containing media player data. */
#define INPUT_REP_REF_BUTTONS_ID        1                                           /**< Id of reference to Mouse Input Report containing button data. */
#define INPUT_REP_REF_MOVEMENT_ID       2                                           /**< Id of reference to Mouse Input Report containing movement data. */
#define INPUT_REP_REF_MPLAYER_ID        3                                           /**< Id of reference to Mouse Input Report containing media player data. */

#define OUTPUT_REPORT_INDEX                 0                                          /**< Index of Output Report. */
#define OUTPUT_REPORT_MAX_LEN               1                                          /**< Maximum length of Output Report. */
#define INPUT_REPORT_KEYS_INDEX             3                                          /**< Index of Input Report. */
#define OUTPUT_REPORT_BIT_MASK_CAPS_LOCK    0x02                                       /**< CAPS LOCK bit in Output Report (based on 'LED Page (0x08)' of the Universal Serial Bus HID Usage Tables). */
#define INPUT_REP_REF_ID                    4                                          /**< Id of reference to Keyboard Input Report. */
#define OUTPUT_REP_REF_ID                   0                                          /**< Id of reference to Keyboard Output Report. */
#define FEATURE_REP_REF_ID                  0                                          /**< ID of reference to Keyboard Feature Report. */
#define FEATURE_REPORT_MAX_LEN              2                                          /**< Maximum length of Feature Report. */
#define FEATURE_REPORT_INDEX                0

#define MAX_BUFFER_ENTRIES                  5  

#define INPUT_REPORT_KEYS_MAX_LEN           8


#define BASE_USB_HID_SPEC_VERSION       0x0101                                      /**< Version number of base USB HID Specification implemented by this application. */

#define SCHED_MAX_EVENT_DATA_SIZE       APP_TIMER_SCHED_EVENT_DATA_SIZE             /**< Maximum size of scheduler events. */
#ifdef SVCALL_AS_NORMAL_FUNCTION
#define SCHED_QUEUE_SIZE                20                                          /**< Maximum number of events in the scheduler queue. More is needed in case of Serialization. */
#else
#define SCHED_QUEUE_SIZE                10                                          /**< Maximum number of events in the scheduler queue. */
#endif

#define DEAD_BEEF                       0xDEADBEEF                                  /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */

#define APP_ADV_FAST_INTERVAL           0x0028                                      /**< Fast advertising interval (in units of 0.625 ms. This value corresponds to 25 ms.). */
#define APP_ADV_SLOW_INTERVAL           0x00A0                                      /**< Slow advertising interval (in units of 0.625 ms. This value corresponds to 100 ms.). */

#define APP_ADV_FAST_DURATION           1000    //3000                                    /**< The advertising duration of fast advertising in units of 10 milliseconds. */
#define APP_ADV_SLOW_DURATION           12000   //18000                                    /**< The advertising duration of slow advertising in units of 10 milliseconds. */


APP_TIMER_DEF(m_battery_timer_id);                                                  /**< Battery timer. */
BLE_BAS_DEF(m_bas);                                                                 /**< Battery service instance. */
BLE_HIDS_DEF(m_hids,                                                                /**< HID service instance. */
             NRF_SDH_BLE_TOTAL_LINK_COUNT,
             INPUT_REP_BUTTONS_LEN,
             INPUT_REP_MOVEMENT_LEN,
             INPUT_REP_MEDIA_PLAYER_LEN);
NRF_BLE_GATT_DEF(m_gatt);                                                           /**< GATT module instance. */
NRF_BLE_QWR_DEF(m_qwr);                                                             /**< Context for the Queued Write module.*/
BLE_ADVERTISING_DEF(m_advertising);                                                 /**< Advertising module instance. */

static nrf_saadc_value_t m_adc_buf;

static bool              m_in_boot_mode = false;                                    /**< Current protocol mode. */
static uint16_t          m_conn_handle  = BLE_CONN_HANDLE_INVALID;                  /**< Handle of the current connection. */
static pm_peer_id_t      m_peer_id;                                                 /**< Device reference handle to the current bonded central. */
static ble_uuid_t        m_adv_uuids[] =                                            /**< Universally unique service identifiers. */
{
    {BLE_UUID_HUMAN_INTERFACE_DEVICE_SERVICE, BLE_UUID_TYPE_BLE}
};

/** @} */

/** Abstracts buffer element */
typedef struct hid_key_buffer
{
    uint8_t      data_offset; /**< Max Data that can be buffered for all entries */
    uint8_t      data_len;    /**< Total length of data */
    uint8_t    * p_data;      /**< Scanned key pattern */
    ble_hids_t * p_instance;  /**< Identifies peer and service instance */
} buffer_entry_t;

STATIC_ASSERT(sizeof(buffer_entry_t) % 4 == 0);

/** Circular buffer list */
typedef struct
{
    buffer_entry_t buffer[MAX_BUFFER_ENTRIES]; /**< Maximum number of entries that can enqueued in the list */
    uint8_t        rp;                         /**< Index to the read location */
    uint8_t        wp;                         /**< Index to write location */
    uint8_t        count;                      /**< Number of elements in the list */
} buffer_list_t;

STATIC_ASSERT(sizeof(buffer_list_t) % 4 == 0);

static buffer_list_t     buffer_list;                               /**< List to enqueue not just data to be sent, but also related information like the handle, connection handle etc */
//Key
static bool              m_caps_on = false;                         /**< Variable to indicate if Caps Lock is turned on. */
static uint8_t m_sample_key_press_scan_str[] = /**< Key pattern to be sent when the key press button has been pushed. */
{
    0x0b,       /* Key h */
    0x08,       /* Key e */
    0x0f,       /* Key l */
    0x0f,       /* Key l */
    0x12,       /* Key o */
    0x28        /* Key Return */
};

static uint8_t m_caps_on_key_scan_str[] = /**< Key pattern to be sent when the output report has been written with the CAPS LOCK bit set. */
{
    0x06,       /* Key C */
    0x04,       /* Key a */
    0x13,       /* Key p */
    0x16,       /* Key s */
    0x12,       /* Key o */
    0x11,       /* Key n */
};

static uint8_t m_caps_off_key_scan_str[] = /**< Key pattern to be sent when the output report has been written with the CAPS LOCK bit cleared. */
{
    0x06,       /* Key C */
    0x04,       /* Key a */
    0x13,       /* Key p */
    0x16,       /* Key s */
    0x12,       /* Key o */
    0x09,       /* Key f */
};
/** @} */

#if SWIFT_PAIR_SUPPORTED == 1
static uint8_t m_sp_payload[] =                                                     /**< Payload of advertising data structure for Microsoft Swift Pair feature. */
{
    MICROSOFT_BEACON_ID,
    MICROSOFT_BEACON_SUB_SCENARIO,
    RESERVED_RSSI_BYTE
};
static ble_advdata_manuf_data_t m_sp_manuf_advdata =                                /**< Advertising data structure for Microsoft Swift Pair feature. */
{
    .company_identifier = MICROSOFT_VENDOR_ID,
    .data               =
    {
        .size   = sizeof(m_sp_payload),
        .p_data = &m_sp_payload[0]
    }
};
static ble_advdata_t m_sp_advdata;
#endif

static void on_hids_evt(ble_hids_t * p_hids, ble_hids_evt_t * p_evt);

/**@brief Callback function for asserts in the SoftDevice.
 *
 * @details This function will be called in case of an assert in the SoftDevice.
 *
 * @warning This handler is an example only and does not fit a final product. You need to analyze
 *          how your product is supposed to react in case of Assert.
 * @warning On assert from the SoftDevice, the system can only recover on reset.
 *
 * @param[in]   line_num   Line number of the failing ASSERT call.
 * @param[in]   file_name  File name of the failing ASSERT call.
 */
void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
    app_error_handler(DEAD_BEEF, line_num, p_file_name);
}


/**@brief Function for setting filtered whitelist.
 *
 * @param[in] skip  Filter passed to @ref pm_peer_id_list.
 */
static void whitelist_set(pm_peer_id_list_skip_t skip)
{
    pm_peer_id_t peer_ids[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
    uint32_t     peer_id_count = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;

    ret_code_t err_code = pm_peer_id_list(peer_ids, &peer_id_count, PM_PEER_ID_INVALID, skip);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_INFO("\tm_whitelist_peer_cnt %d, MAX_PEERS_WLIST %d",
                   peer_id_count + 1,
                   BLE_GAP_WHITELIST_ADDR_MAX_COUNT);

    err_code = pm_whitelist_set(peer_ids, peer_id_count);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for setting filtered device identities.
 *
 * @param[in] skip  Filter passed to @ref pm_peer_id_list.
 */
static void identities_set(pm_peer_id_list_skip_t skip)
{
    pm_peer_id_t peer_ids[BLE_GAP_DEVICE_IDENTITIES_MAX_COUNT];
    uint32_t     peer_id_count = BLE_GAP_DEVICE_IDENTITIES_MAX_COUNT;

    ret_code_t err_code = pm_peer_id_list(peer_ids, &peer_id_count, PM_PEER_ID_INVALID, skip);
    APP_ERROR_CHECK(err_code);

    err_code = pm_device_identities_list_set(peer_ids, peer_id_count);
    APP_ERROR_CHECK(err_code);
}


/**@brief Clear bond information from persistent storage.
 */
static void delete_bonds(void)
{
    ret_code_t err_code;

    NRF_LOG_INFO("Erase bonds!");

    err_code = pm_peers_delete();
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for starting advertising.
 */
static void advertising_start(bool erase_bonds)
{
    if (erase_bonds == true)
    {
        delete_bonds();
        // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
    }
    else
    {
        whitelist_set(PM_PEER_ID_LIST_SKIP_NO_ID_ADDR);

        ret_code_t ret = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
        APP_ERROR_CHECK(ret);
    }
}


/**@brief Function for handling Peer Manager events.
 *
 * @param[in] p_evt  Peer Manager event.
 */
static void pm_evt_handler(pm_evt_t const * p_evt)
{
    pm_handler_on_pm_evt(p_evt);
    pm_handler_flash_clean(p_evt);

    switch (p_evt->evt_id)
    {
        case PM_EVT_CONN_SEC_SUCCEEDED:
            m_peer_id = p_evt->peer_id;
						m_hid_data.peer_manage = true;
            break;

        case PM_EVT_PEERS_DELETE_SUCCEEDED:
            advertising_start(false);
            break;

        case PM_EVT_PEER_DATA_UPDATE_SUCCEEDED:
            if (     p_evt->params.peer_data_update_succeeded.flash_changed
                 && (p_evt->params.peer_data_update_succeeded.data_id == PM_PEER_DATA_ID_BONDING))
            {
                NRF_LOG_INFO("New Bond, add the peer to the whitelist if possible");
                // Note: You should check on what kind of white list policy your application should use.

                whitelist_set(PM_PEER_ID_LIST_SKIP_NO_ID_ADDR);
            }
            break;
				case PM_EVT_CONN_SEC_CONFIG_REQ:
					  {
								pm_conn_sec_config_t config = {.allow_repairing = true};
								pm_conn_sec_config_reply(p_evt->conn_handle, &config);
					  }
						break;
        default:
            break;
    }
}


/**@brief Function for handling Service errors.
 *
 * @details A pointer to this function will be passed to each service which may need to inform the
 *          application about an error.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void service_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function for handling advertising errors.
 *
 * @param[in] nrf_error  Error code containing information about what went wrong.
 */
static void ble_advertising_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}

/**@brief Function for handling the ADC interrupt.
 *
 * @details  This function will fetch the conversion result from the ADC, convert the value into
 *           percentage and send it to peer.
 */
void saadc_event_handler(nrf_drv_saadc_evt_t const * p_event)
{
    if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
    {
        nrf_saadc_value_t adc_result;
        uint16_t batt_lvl_in_milli_volts;

        adc_result = p_event->data.done.p_buffer[0];
				
        batt_lvl_in_milli_volts =
            (ADC_RESULT_IN_MILLI_VOLTS(adc_result) + DIODE_FWD_VOLT_DROP_MILLIVOLTS)*2;
				if(batt_lvl_in_milli_volts>=4100) m_hid_data.battery_level=100;
				else if((batt_lvl_in_milli_volts>=3900)&((batt_lvl_in_milli_volts<4100))) m_hid_data.battery_level=75;
				else if((batt_lvl_in_milli_volts>=3700)&((batt_lvl_in_milli_volts<3900))) m_hid_data.battery_level=50;
				else if((batt_lvl_in_milli_volts>=3550)&((batt_lvl_in_milli_volts<3700))) m_hid_data.battery_level=25;
				else if(batt_lvl_in_milli_volts<3550) m_hid_data.battery_level=0;
				
				if(batt_lvl_in_milli_volts<=3450)
				{
						if(m_hid_data.ble_status != DEVICE_LOW_POWER_WAIT)
						{
								m_hid_data.ble_status = DEVICE_LOW_POWER;
						}
				}else if(batt_lvl_in_milli_volts>=3600)
				{
						if(m_hid_data.ble_status == DEVICE_LOW_POWER_WAIT)
						{
								m_hid_data.ble_status = DEVICE_LOW_POWER_EXIT;
						}
				}
        NRF_LOG_INFO("HID DEVICE Battery Level : %d [mV]  %d%%", batt_lvl_in_milli_volts,m_hid_data.battery_level);
    }
    else if (p_event->type == NRF_DRV_SAADC_EVT_CALIBRATEDONE)
    {
        NRF_LOG_INFO("HID SAADC calibration complete");
    }
}
/**@brief Function for performing a battery measurement, and update the Battery Level characteristic in the Battery Service.
 */
static void battery_level_update(void)
{
    ret_code_t err_code;
	
		static uint8_t * p_key = m_sample_key_press_scan_str;
    static uint8_t   size  = 0;

    err_code = nrf_drv_saadc_buffer_convert(&m_adc_buf, 1);
    APP_ERROR_CHECK(err_code);
    
    err_code = nrf_drv_saadc_sample();
    APP_ERROR_CHECK(err_code);	
	
    err_code = ble_bas_battery_level_update(&m_bas, m_hid_data.battery_level, BLE_CONN_HANDLE_ALL);
    if ((err_code != NRF_SUCCESS) &&
        (err_code != NRF_ERROR_BUSY) &&
        (err_code != NRF_ERROR_RESOURCES) &&
        (err_code != NRF_ERROR_FORBIDDEN) &&
        (err_code != NRF_ERROR_INVALID_STATE) &&
        (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
       )
    {
        APP_ERROR_HANDLER(err_code);
    }
		NRF_LOG_INFO("xxxxx...");
		if (m_hid_data.peer_manage == true)
		{
				NRF_LOG_INFO("Keys update...");
				keys_send(1, p_key);
				p_key++;
				size++;
				if (size == MAX_KEYS_IN_ONE_REPORT)
				{
						p_key = m_sample_key_press_scan_str;
						size  = 0;
				}
		}
}

/**@brief Function for handling the Battery measurement timer timeout.
 *
 * @details This function will be called each time the battery level measurement timer expires.
 *
 * @param[in]   p_context   Pointer used for passing some arbitrary information (context) from the
 *                          app_start_timer() call to the timeout handler.
 */
static void battery_level_meas_timeout_handler(void * p_context)
{
    UNUSED_PARAMETER(p_context);
    battery_level_update();
}


/**@brief Function for the Timer initialization.
 *
 * @details Initializes the timer module.
 */
static void timers_init(void)
{
    ret_code_t err_code;

    err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_init(NULL, saadc_event_handler);
    APP_ERROR_CHECK(err_code);

    nrf_saadc_channel_config_t config =
        NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN2);

    config.burst = NRF_SAADC_BURST_ENABLED;

    err_code = nrf_drv_saadc_channel_init(0, &config);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_calibrate_offset();
    APP_ERROR_CHECK(err_code);	
	
    // Create battery timer.
    err_code = app_timer_create(&m_battery_timer_id,
                                APP_TIMER_MODE_REPEATED,
                                battery_level_meas_timeout_handler);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for the GAP initialization.
 *
 * @details This function sets up all the necessary GAP (Generic Access Profile) parameters of the
 *          device including the device name, appearance, and the preferred connection parameters.
 */
static void gap_params_init(void)
{
    ret_code_t              err_code;
    ble_gap_conn_params_t   gap_conn_params;
    ble_gap_conn_sec_mode_t sec_mode;

    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

    err_code = sd_ble_gap_device_name_set(&sec_mode,
                                          (const uint8_t *)DEVICE_NAME,
                                          strlen(DEVICE_NAME));
    APP_ERROR_CHECK(err_code);

    err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_HID_MOUSE);
    APP_ERROR_CHECK(err_code);

    memset(&gap_conn_params, 0, sizeof(gap_conn_params));

    gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
    gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
    gap_conn_params.slave_latency     = SLAVE_LATENCY;
    gap_conn_params.conn_sup_timeout  = CONN_SUP_TIMEOUT;

    err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the GATT module.
 */
static void gatt_init(void)
{
    ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling Queued Write Module errors.
 *
 * @details A pointer to this function will be passed to each service which may need to inform the
 *          application about an error.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void nrf_qwr_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function for initializing the Queued Write Module.
 */
static void qwr_init(void)
{
    ret_code_t         err_code;
    nrf_ble_qwr_init_t qwr_init_obj = {0};

    qwr_init_obj.error_handler = nrf_qwr_error_handler;

    err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init_obj);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing Device Information Service.
 */
static void dis_init(void)
{
    ret_code_t       err_code;
    ble_dis_init_t   dis_init_obj;
    ble_dis_pnp_id_t pnp_id;

    pnp_id.vendor_id_source = PNP_ID_VENDOR_ID_SOURCE;
    pnp_id.vendor_id        = PNP_ID_VENDOR_ID;
    pnp_id.product_id       = PNP_ID_PRODUCT_ID;
    pnp_id.product_version  = PNP_ID_PRODUCT_VERSION;

    memset(&dis_init_obj, 0, sizeof(dis_init_obj));

    ble_srv_ascii_to_utf8(&dis_init_obj.manufact_name_str, MANUFACTURER_NAME);
    dis_init_obj.p_pnp_id = &pnp_id;

    dis_init_obj.dis_char_rd_sec = SEC_JUST_WORKS;

    err_code = ble_dis_init(&dis_init_obj);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing Battery Service.
 */
static void bas_init(void)
{
    ret_code_t     err_code;
    ble_bas_init_t bas_init_obj;

    memset(&bas_init_obj, 0, sizeof(bas_init_obj));

    bas_init_obj.evt_handler          = NULL;
    bas_init_obj.support_notification = true;
    bas_init_obj.p_report_ref         = NULL;
    bas_init_obj.initial_batt_level   = 100;

    bas_init_obj.bl_rd_sec        = SEC_JUST_WORKS;
    bas_init_obj.bl_cccd_wr_sec   = SEC_JUST_WORKS;
    bas_init_obj.bl_report_rd_sec = SEC_JUST_WORKS;

    err_code = ble_bas_init(&m_bas, &bas_init_obj);
    APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing DFU Service.
 */
static void advertising_config_get(ble_adv_modes_config_t * p_config)
{
    memset(p_config, 0, sizeof(ble_adv_modes_config_t));

    p_config->ble_adv_fast_enabled  = true;
    p_config->ble_adv_fast_interval = APP_ADV_FAST_INTERVAL;
    p_config->ble_adv_fast_timeout  = APP_ADV_FAST_DURATION;
}
static void disconnect(uint16_t conn_handle, void * p_context)
{
    UNUSED_PARAMETER(p_context);

    ret_code_t err_code = sd_ble_gap_disconnect(conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    if (err_code != NRF_SUCCESS)
    {
        NRF_LOG_WARNING("Failed to disconnect connection. Connection handle: %d Error: %d", conn_handle, err_code);
    }
    else
    {
        NRF_LOG_DEBUG("Disconnected connection handle %d", conn_handle);
    }
}
/**@brief Function for handling dfu events from the Buttonless Secure DFU service
 *
 * @param[in]   event   Event from the Buttonless Secure DFU service.
 */
static void ble_dfu_evt_handler(ble_dfu_buttonless_evt_type_t event)
{
    switch (event)
    {
        case BLE_DFU_EVT_BOOTLOADER_ENTER_PREPARE:
        {
            NRF_LOG_INFO("Device is preparing to enter bootloader mode.");

            // Prevent device from advertising on disconnect.
            ble_adv_modes_config_t config;
            advertising_config_get(&config);
            config.ble_adv_on_disconnect_disabled = true;
            ble_advertising_modes_config_set(&m_advertising, &config);

            // Disconnect all other bonded devices that currently are connected.
            // This is required to receive a service changed indication
            // on bootup after a successful (or aborted) Device Firmware Update.
            uint32_t conn_count = ble_conn_state_for_each_connected(disconnect, NULL);
            NRF_LOG_INFO("Disconnected %d links.", conn_count);
            break;
        }

        case BLE_DFU_EVT_BOOTLOADER_ENTER:
            // YOUR_JOB: Write app-specific unwritten data to FLASH, control finalization of this
            //           by delaying reset by reporting false in app_shutdown_handler
            NRF_LOG_INFO("Device will enter bootloader mode.");
            break;

        case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
            NRF_LOG_ERROR("Request to enter bootloader mode failed asynchroneously.");
            // YOUR_JOB: Take corrective measures to resolve the issue
            //           like calling APP_ERROR_CHECK to reset the device.
            break;

        case BLE_DFU_EVT_RESPONSE_SEND_ERROR:
            NRF_LOG_ERROR("Request to send a response to client failed.");
            // YOUR_JOB: Take corrective measures to resolve the issue
            //           like calling APP_ERROR_CHECK to reset the device.
            APP_ERROR_CHECK(false);
            break;

        default:
            NRF_LOG_ERROR("Unknown event from ble_dfu_buttonless.");
            break;
    }
}
/**@brief Function for initializing DFU Service.
 */
static void dfu_init(void)
{
		uint32_t           err_code;
		
		ble_dfu_buttonless_init_t dfus_init = {0};
		
		dfus_init.evt_handler = ble_dfu_evt_handler;
    err_code = ble_dfu_buttonless_init(&dfus_init);
    APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing HID Service.
 */
static void hids_init(void)
{
    ret_code_t                    err_code;
    ble_hids_init_t               hids_init_obj;
    ble_hids_inp_rep_init_t     * p_input_report;
    ble_hids_outp_rep_init_t    * p_output_report;
    ble_hids_feature_rep_init_t * p_feature_report;
    uint8_t                       hid_info_flags;

    static ble_hids_inp_rep_init_t     input_report_array[INPUT_REPORT_COUNT];
    static ble_hids_outp_rep_init_t    output_report_array[1];
    static ble_hids_feature_rep_init_t feature_report_array[1];
    static uint8_t rep_map_data[] =
    {
        0x05, 0x01, // Usage Page (Generic Desktop)
        0x09, 0x02, // Usage (Mouse)

        0xA1, 0x01, // Collection (Application)

        // Report ID 1: Mouse buttons + scroll/pan
        0x85, 0x01,       // Report Id 1
        0x09, 0x01,       // Usage (Pointer)
        0xA1, 0x00,       // Collection (Physical)
        0x95, 0x05,       // Report Count (3)
        0x75, 0x01,       // Report Size (1)
        0x05, 0x09,       // Usage Page (Buttons)
        0x19, 0x01,       // Usage Minimum (01)
        0x29, 0x05,       // Usage Maximum (05)
        0x15, 0x00,       // Logical Minimum (0)
        0x25, 0x01,       // Logical Maximum (1)
        0x81, 0x02,       // Input (Data, Variable, Absolute)
        0x95, 0x01,       // Report Count (1)
        0x75, 0x03,       // Report Size (3)
        0x81, 0x01,       // Input (Constant) for padding
        0x75, 0x08,       // Report Size (8)
        0x95, 0x01,       // Report Count (1)
        0x05, 0x01,       // Usage Page (Generic Desktop)
        0x09, 0x38,       // Usage (Wheel)
        0x15, 0x81,       // Logical Minimum (-127)
        0x25, 0x7F,       // Logical Maximum (127)
        0x81, 0x06,       // Input (Data, Variable, Relative)
        0x05, 0x0C,       // Usage Page (Consumer)
        0x0A, 0x38, 0x02, // Usage (AC Pan)
        0x95, 0x01,       // Report Count (1)
        0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
        0xC0,             // End Collection (Physical)

        // Report ID 2: Mouse motion
        0x85, 0x02,       // Report Id 2
        0x09, 0x01,       // Usage (Pointer)
        0xA1, 0x00,       // Collection (Physical)
        0x75, 0x0C,       // Report Size (12)
        0x95, 0x02,       // Report Count (2)
        0x05, 0x01,       // Usage Page (Generic Desktop)
        0x09, 0x30,       // Usage (X)
        0x09, 0x31,       // Usage (Y)
        0x16, 0x01, 0xF8, // Logical maximum (2047)
        0x26, 0xFF, 0x07, // Logical minimum (-2047)
        0x81, 0x06,       // Input (Data, Variable, Relative)
        0xC0,             // End Collection (Physical)
        0xC0,             // End Collection (Application)

        // Report ID 3: Advanced buttons
        0x05, 0x0C,       // Usage Page (Consumer)
        0x09, 0x01,       // Usage (Consumer Control)
        0xA1, 0x01,       // Collection (Application)
        0x85, 0x03,       // Report Id (3)
        0x15, 0x00,       // Logical minimum (0)
        0x25, 0x01,       // Logical maximum (1)
        0x75, 0x01,       // Report Size (1)
        0x95, 0x01,       // Report Count (1)

        0x09, 0xCD,       // Usage (Play/Pause)
        0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
        0x0A, 0x83, 0x01, // Usage (AL Consumer Control Configuration)
        0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
        0x09, 0xB5,       // Usage (Scan Next Track)
        0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
        0x09, 0xB6,       // Usage (Scan Previous Track)
        0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)

        0x09, 0xEA,       // Usage (Volume Down)
        0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
        0x09, 0xE9,       // Usage (Volume Up)
        0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
        0x0A, 0x25, 0x02, // Usage (AC Forward)
        0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
        0x0A, 0x24, 0x02, // Usage (AC Back)
        0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
        0xC0,              // End Collection

				// Report ID 4: Key board
        0x05, 0x01,       // Usage Page (Generic Desktop)
        0x09, 0x06,       // Usage (Keyboard)
        0xA1, 0x01,       // Collection (Application)
				0x85, 0x04,       // Report Id (4)
        0x05, 0x07,       // Usage Page (Key Codes)
        0x19, 0xe0,       // Usage Minimum (224)
        0x29, 0xe7,       // Usage Maximum (231)
        0x15, 0x00,       // Logical Minimum (0)
        0x25, 0x01,       // Logical Maximum (1)
        0x75, 0x01,       // Report Size (1)
        0x95, 0x08,       // Report Count (8)
        0x81, 0x02,       // Input (Data, Variable, Absolute)

        0x95, 0x01,       // Report Count (1)
        0x75, 0x08,       // Report Size (8)
        0x81, 0x01,       // Input (Constant) reserved byte(1)

        0x95, 0x05,       // Report Count (5)
        0x75, 0x01,       // Report Size (1)
        0x05, 0x08,       // Usage Page (Page# for LEDs)
        0x19, 0x01,       // Usage Minimum (1)
        0x29, 0x05,       // Usage Maximum (5)
        0x91, 0x02,       // Output (Data, Variable, Absolute), Led report
        0x95, 0x01,       // Report Count (1)
        0x75, 0x03,       // Report Size (3)
        0x91, 0x01,       // Output (Data, Variable, Absolute), Led report padding

        0x95, 0x06,       // Report Count (6)
        0x75, 0x08,       // Report Size (8)
        0x15, 0x00,       // Logical Minimum (0)
        0x25, 0x65,       // Logical Maximum (101)
        0x05, 0x07,       // Usage Page (Key codes)
        0x19, 0x00,       // Usage Minimum (0)
        0x29, 0x65,       // Usage Maximum (101)
        0x81, 0x00,       // Input (Data, Array) Key array(6 bytes)

        0x09, 0x05,       // Usage (Vendor Defined)
        0x15, 0x00,       // Logical Minimum (0)
        0x26, 0xFF, 0x00, // Logical Maximum (255)
        0x75, 0x08,       // Report Size (8 bit)
        0x95, 0x02,       // Report Count (2)
        0xB1, 0x02,       // Feature (Data, Variable, Absolute)

        0xC0              // End Collection (Application)
		
    };
		//Key
    memset((void *)input_report_array, 0, sizeof(ble_hids_inp_rep_init_t));
    memset((void *)output_report_array, 0, sizeof(ble_hids_outp_rep_init_t));
    memset((void *)feature_report_array, 0, sizeof(ble_hids_feature_rep_init_t));
		
    // Initialize HID Service.
    p_input_report                      = &input_report_array[INPUT_REP_BUTTONS_INDEX];
    p_input_report->max_len             = INPUT_REP_BUTTONS_LEN;
    p_input_report->rep_ref.report_id   = INPUT_REP_REF_BUTTONS_ID;
    p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;

    p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
    p_input_report->sec.wr      = SEC_JUST_WORKS;
    p_input_report->sec.rd      = SEC_JUST_WORKS;

    p_input_report                      = &input_report_array[INPUT_REP_MOVEMENT_INDEX];
    p_input_report->max_len             = INPUT_REP_MOVEMENT_LEN;
    p_input_report->rep_ref.report_id   = INPUT_REP_REF_MOVEMENT_ID;
    p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;

    p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
    p_input_report->sec.wr      = SEC_JUST_WORKS;
    p_input_report->sec.rd      = SEC_JUST_WORKS;

    p_input_report                      = &input_report_array[INPUT_REP_MPLAYER_INDEX];
    p_input_report->max_len             = INPUT_REP_MEDIA_PLAYER_LEN;
    p_input_report->rep_ref.report_id   = INPUT_REP_REF_MPLAYER_ID;
    p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;

    p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
    p_input_report->sec.wr      = SEC_JUST_WORKS;
    p_input_report->sec.rd      = SEC_JUST_WORKS;		
		
		//Key
    p_input_report                      = &input_report_array[INPUT_REPORT_KEYS_INDEX];
    p_input_report->max_len             = INPUT_REPORT_KEYS_MAX_LEN;
    p_input_report->rep_ref.report_id   = INPUT_REP_REF_ID;
    p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;

    p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
    p_input_report->sec.wr      = SEC_JUST_WORKS;
    p_input_report->sec.rd      = SEC_JUST_WORKS;

    p_output_report                      = &output_report_array[OUTPUT_REPORT_INDEX];
    p_output_report->max_len             = OUTPUT_REPORT_MAX_LEN;
    p_output_report->rep_ref.report_id   = OUTPUT_REP_REF_ID;
    p_output_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_OUTPUT;

    p_output_report->sec.wr = SEC_JUST_WORKS;
    p_output_report->sec.rd = SEC_JUST_WORKS;

    p_feature_report                      = &feature_report_array[FEATURE_REPORT_INDEX];
    p_feature_report->max_len             = FEATURE_REPORT_MAX_LEN;
    p_feature_report->rep_ref.report_id   = FEATURE_REP_REF_ID;
    p_feature_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_FEATURE;

    p_feature_report->sec.rd              = SEC_JUST_WORKS;
    p_feature_report->sec.wr              = SEC_JUST_WORKS;		

    hid_info_flags = HID_INFO_FLAG_REMOTE_WAKE_MSK | HID_INFO_FLAG_NORMALLY_CONNECTABLE_MSK;

    memset(&hids_init_obj, 0, sizeof(hids_init_obj));

    hids_init_obj.evt_handler                    = on_hids_evt;
    hids_init_obj.error_handler                  = service_error_handler;
    hids_init_obj.is_kb                          = true;
    hids_init_obj.is_mouse                       = true;
    hids_init_obj.inp_rep_count                  = INPUT_REPORT_COUNT;
    hids_init_obj.p_inp_rep_array                = input_report_array;
    hids_init_obj.outp_rep_count                 = 1;
    hids_init_obj.p_outp_rep_array               = output_report_array;
    hids_init_obj.feature_rep_count              = 1;
    hids_init_obj.p_feature_rep_array            = feature_report_array;
    hids_init_obj.rep_map.data_len               = sizeof(rep_map_data);
    hids_init_obj.rep_map.p_data                 = rep_map_data;
    hids_init_obj.hid_information.bcd_hid        = BASE_USB_HID_SPEC_VERSION;
    hids_init_obj.hid_information.b_country_code = 0;
    hids_init_obj.hid_information.flags          = hid_info_flags;
    hids_init_obj.included_services_count        = 0;
    hids_init_obj.p_included_services_array      = NULL;

    hids_init_obj.rep_map.rd_sec         = SEC_JUST_WORKS;
    hids_init_obj.hid_information.rd_sec = SEC_JUST_WORKS;
		//Key
    hids_init_obj.boot_kb_inp_rep_sec.cccd_wr = SEC_JUST_WORKS;
    hids_init_obj.boot_kb_inp_rep_sec.rd      = SEC_JUST_WORKS;

    hids_init_obj.boot_kb_outp_rep_sec.rd = SEC_JUST_WORKS;
    hids_init_obj.boot_kb_outp_rep_sec.wr = SEC_JUST_WORKS;

    hids_init_obj.boot_mouse_inp_rep_sec.cccd_wr = SEC_JUST_WORKS;
    hids_init_obj.boot_mouse_inp_rep_sec.wr      = SEC_JUST_WORKS;
    hids_init_obj.boot_mouse_inp_rep_sec.rd      = SEC_JUST_WORKS;

    hids_init_obj.protocol_mode_rd_sec = SEC_JUST_WORKS;
    hids_init_obj.protocol_mode_wr_sec = SEC_JUST_WORKS;
    hids_init_obj.ctrl_point_wr_sec    = SEC_JUST_WORKS;

    err_code = ble_hids_init(&m_hids, &hids_init_obj);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing services that will be used by the application.
 */
static void services_init(void)
{
    qwr_init();
    dis_init();
    bas_init();
    hids_init();
		dfu_init();
}


/**@brief Function for initializing the battery sensor simulator.
 */
//static void sensor_simulator_init(void)
//{
//    m_battery_sim_cfg.min          = MIN_BATTERY_LEVEL;
//    m_battery_sim_cfg.max          = MAX_BATTERY_LEVEL;
//    m_battery_sim_cfg.incr         = BATTERY_LEVEL_INCREMENT;
//    m_battery_sim_cfg.start_at_max = true;

//    sensorsim_init(&m_battery_sim_state, &m_battery_sim_cfg);
//}


/**@brief Function for handling a Connection Parameters error.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void conn_params_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function for initializing the Connection Parameters module.
 */
static void conn_params_init(void)
{
    ret_code_t             err_code;
    ble_conn_params_init_t cp_init;

    memset(&cp_init, 0, sizeof(cp_init));

    cp_init.p_conn_params                  = NULL;
    cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
    cp_init.next_conn_params_update_delay  = NEXT_CONN_PARAMS_UPDATE_DELAY;
    cp_init.max_conn_params_update_count   = MAX_CONN_PARAM_UPDATE_COUNT;
    cp_init.start_on_notify_cccd_handle    = BLE_GATT_HANDLE_INVALID;
    cp_init.disconnect_on_fail             = false;
    cp_init.evt_handler                    = NULL;
    cp_init.error_handler                  = conn_params_error_handler;

    err_code = ble_conn_params_init(&cp_init);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for starting timers.
 */
static void timers_start(void)
{
    ret_code_t err_code;

    err_code = app_timer_start(m_battery_timer_id, BATTERY_LEVEL_MEAS_INTERVAL, NULL);
    APP_ERROR_CHECK(err_code);
}

/**@brief   Function for transmitting a key scan Press & Release Notification.
 *
 * @warning This handler is an example only. You need to analyze how you wish to send the key
 *          release.
 *
 * @param[in]  p_instance     Identifies the service for which Key Notifications are requested.
 * @param[in]  p_key_pattern  Pointer to key pattern.
 * @param[in]  pattern_len    Length of key pattern. 0 < pattern_len < 7.
 * @param[in]  pattern_offset Offset applied to Key Pattern for transmission.
 * @param[out] actual_len     Provides actual length of Key Pattern transmitted, making buffering of
 *                            rest possible if needed.
 * @return     NRF_SUCCESS on success, NRF_ERROR_RESOURCES in case transmission could not be
 *             completed due to lack of transmission buffer or other error codes indicating reason
 *             for failure.
 *
 * @note       In case of NRF_ERROR_RESOURCES, remaining pattern that could not be transmitted
 *             can be enqueued \ref buffer_enqueue function.
 *             In case a pattern of 'cofFEe' is the p_key_pattern, with pattern_len as 6 and
 *             pattern_offset as 0, the notifications as observed on the peer side would be
 *             1>    'c', 'o', 'f', 'F', 'E', 'e'
 *             2>    -  , 'o', 'f', 'F', 'E', 'e'
 *             3>    -  ,   -, 'f', 'F', 'E', 'e'
 *             4>    -  ,   -,   -, 'F', 'E', 'e'
 *             5>    -  ,   -,   -,   -, 'E', 'e'
 *             6>    -  ,   -,   -,   -,   -, 'e'
 *             7>    -  ,   -,   -,   -,   -,  -
 *             Here, '-' refers to release, 'c' refers to the key character being transmitted.
 *             Therefore 7 notifications will be sent.
 *             In case an offset of 4 was provided, the pattern notifications sent will be from 5-7
 *             will be transmitted.
 */
static uint32_t send_key_scan_press_release(ble_hids_t * p_hids,
                                            uint8_t    * p_key_pattern,
                                            uint16_t     pattern_len,
                                            uint16_t     pattern_offset,
                                            uint16_t   * p_actual_len)
{
    ret_code_t err_code;
    uint16_t offset;
    uint16_t data_len;
    uint8_t  data[INPUT_REPORT_KEYS_MAX_LEN];

    // HID Report Descriptor enumerates an array of size 6, the pattern hence shall not be any
    // longer than this.
    STATIC_ASSERT((INPUT_REPORT_KEYS_MAX_LEN - 2) == 6);

    ASSERT(pattern_len <= (INPUT_REPORT_KEYS_MAX_LEN - 2));

    offset   = pattern_offset;
    data_len = pattern_len;

    do
    {
        // Reset the data buffer.
        memset(data, 0, sizeof(data));

        // Copy the scan code.
        memcpy(data + SCAN_CODE_POS + offset, p_key_pattern + offset, data_len - offset);

//        if (bsp_button_is_pressed(SHIFT_BUTTON_ID))
//        {
//            data[MODIFIER_KEY_POS] |= SHIFT_KEY_CODE;
//        }
				data[MODIFIER_KEY_POS] |= SHIFT_KEY_CODE;

        if (!m_in_boot_mode)
        {
            err_code = ble_hids_inp_rep_send(p_hids,
                                             INPUT_REPORT_KEYS_INDEX,
                                             INPUT_REPORT_KEYS_MAX_LEN,
                                             data,
                                             m_conn_handle);
        }
        else
        {
            err_code = ble_hids_boot_kb_inp_rep_send(p_hids,
                                                     INPUT_REPORT_KEYS_MAX_LEN,
                                                     data,
                                                     m_conn_handle);
        }

        if (err_code != NRF_SUCCESS)
        {
            break;
        }

        offset++;
    }
    while (offset <= data_len);

    *p_actual_len = offset;

    return err_code;
}


/**@brief   Function for initializing the buffer queue used to key events that could not be
 *          transmitted
 *
 * @warning This handler is an example only. You need to analyze how you wish to buffer or buffer at
 *          all.
 *
 * @note    In case of HID keyboard, a temporary buffering could be employed to handle scenarios
 *          where encryption is not yet enabled or there was a momentary link loss or there were no
 *          Transmit buffers.
 */
static void buffer_init(void)
{
    uint32_t buffer_count;

    BUFFER_LIST_INIT();

    for (buffer_count = 0; buffer_count < MAX_BUFFER_ENTRIES; buffer_count++)
    {
        BUFFER_ELEMENT_INIT(buffer_count);
    }
}


/**@brief Function for enqueuing key scan patterns that could not be transmitted either completely
 *        or partially.
 *
 * @warning This handler is an example only. You need to analyze how you wish to send the key
 *          release.
 *
 * @param[in]  p_hids         Identifies the service for which Key Notifications are buffered.
 * @param[in]  p_key_pattern  Pointer to key pattern.
 * @param[in]  pattern_len    Length of key pattern.
 * @param[in]  offset         Offset applied to Key Pattern when requesting a transmission on
 *                            dequeue, @ref buffer_dequeue.
 * @return     NRF_SUCCESS on success, else an error code indicating reason for failure.
 */
static uint32_t buffer_enqueue(ble_hids_t * p_hids,
                               uint8_t    * p_key_pattern,
                               uint16_t     pattern_len,
                               uint16_t     offset)
{
    buffer_entry_t * element;
    uint32_t         err_code = NRF_SUCCESS;

    if (BUFFER_LIST_FULL())
    {
        // Element cannot be buffered.
        err_code = NRF_ERROR_NO_MEM;
    }
    else
    {
        // Make entry of buffer element and copy data.
        element              = &buffer_list.buffer[(buffer_list.wp)];
        element->p_instance  = p_hids;
        element->p_data      = p_key_pattern;
        element->data_offset = offset;
        element->data_len    = pattern_len;

        buffer_list.count++;
        buffer_list.wp++;

        if (buffer_list.wp == MAX_BUFFER_ENTRIES)
        {
            buffer_list.wp = 0;
        }
    }

    return err_code;
}
/**@brief   Function to dequeue key scan patterns that could not be transmitted either completely of
 *          partially.
 *
 * @warning This handler is an example only. You need to analyze how you wish to send the key
 *          release.
 *
 * @param[in]  tx_flag   Indicative of whether the dequeue should result in transmission or not.
 * @note       A typical example when all keys are dequeued with transmission is when link is
 *             disconnected.
 *
 * @return     NRF_SUCCESS on success, else an error code indicating reason for failure.
 */
static uint32_t buffer_dequeue(bool tx_flag)
{
    buffer_entry_t * p_element;
    uint32_t         err_code = NRF_SUCCESS;
    uint16_t         actual_len;

    if (BUFFER_LIST_EMPTY())
    {
        err_code = NRF_ERROR_NOT_FOUND;
    }
    else
    {
        bool remove_element = true;

        p_element = &buffer_list.buffer[(buffer_list.rp)];

        if (tx_flag)
        {
            err_code = send_key_scan_press_release(p_element->p_instance,
                                                   p_element->p_data,
                                                   p_element->data_len,
                                                   p_element->data_offset,
                                                   &actual_len);
            // An additional notification is needed for release of all keys, therefore check
            // is for actual_len <= element->data_len and not actual_len < element->data_len
            if ((err_code == NRF_ERROR_RESOURCES) && (actual_len <= p_element->data_len))
            {
                // Transmission could not be completed, do not remove the entry, adjust next data to
                // be transmitted
                p_element->data_offset = actual_len;
                remove_element         = false;
            }
        }

        if (remove_element)
        {
            BUFFER_ELEMENT_INIT(buffer_list.rp);

            buffer_list.rp++;
            buffer_list.count--;

            if (buffer_list.rp == MAX_BUFFER_ENTRIES)
            {
                buffer_list.rp = 0;
            }
        }
    }

    return err_code;
}
/**@brief Function for sending sample key presses to the peer.
 *
 * @param[in]   key_pattern_len   Pattern length.
 * @param[in]   p_key_pattern     Pattern to be sent.
 */
void keys_send(uint8_t key_pattern_len, uint8_t * p_key_pattern)
{
    ret_code_t err_code;
    uint16_t actual_len;

    err_code = send_key_scan_press_release(&m_hids,
                                           p_key_pattern,
                                           key_pattern_len,
                                           0,
                                           &actual_len);
    // An additional notification is needed for release of all keys, therefore check
    // is for actual_len <= key_pattern_len and not actual_len < key_pattern_len.
    if ((err_code == NRF_ERROR_RESOURCES) && (actual_len <= key_pattern_len))
    {
        // Buffer enqueue routine return value is not intentionally checked.
        // Rationale: Its better to have a a few keys missing than have a system
        // reset. Recommendation is to work out most optimal value for
        // MAX_BUFFER_ENTRIES to minimize chances of buffer queue full condition
        UNUSED_VARIABLE(buffer_enqueue(&m_hids, p_key_pattern, key_pattern_len, actual_len));
    }


    if ((err_code != NRF_SUCCESS) &&
        (err_code != NRF_ERROR_INVALID_STATE) &&
        (err_code != NRF_ERROR_RESOURCES) &&
        (err_code != NRF_ERROR_BUSY) &&
        (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
       )
    {
        APP_ERROR_HANDLER(err_code);
    }
}
/**@brief Function for handling the HID Report Characteristic Write event.
 *
 * @param[in]   p_evt   HID service event.
 */
static void on_hid_rep_char_write(ble_hids_evt_t * p_evt)
{
    if (p_evt->params.char_write.char_id.rep_type == BLE_HIDS_REP_TYPE_OUTPUT)
    {
        ret_code_t err_code;
        uint8_t  report_val;
        uint8_t  report_index = p_evt->params.char_write.char_id.rep_index;

        if (report_index == OUTPUT_REPORT_INDEX)
        {
            // This code assumes that the output report is one byte long. Hence the following
            // static assert is made.
            STATIC_ASSERT(OUTPUT_REPORT_MAX_LEN == 1);

            err_code = ble_hids_outp_rep_get(&m_hids,
                                             report_index,
                                             OUTPUT_REPORT_MAX_LEN,
                                             0,
                                             m_conn_handle,
                                             &report_val);
            APP_ERROR_CHECK(err_code);

            if (!m_caps_on && ((report_val & OUTPUT_REPORT_BIT_MASK_CAPS_LOCK) != 0))
            {
                // Caps Lock is turned On.
                NRF_LOG_INFO("Caps Lock is turned On!");
//                err_code = bsp_indication_set(BSP_INDICATE_ALERT_3);
//                APP_ERROR_CHECK(err_code);

                keys_send(sizeof(m_caps_on_key_scan_str), m_caps_on_key_scan_str);
                m_caps_on = true;
            }
            else if (m_caps_on && ((report_val & OUTPUT_REPORT_BIT_MASK_CAPS_LOCK) == 0))
            {
                // Caps Lock is turned Off .
                NRF_LOG_INFO("Caps Lock is turned Off!");
//                err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF);
//                APP_ERROR_CHECK(err_code);

                keys_send(sizeof(m_caps_off_key_scan_str), m_caps_off_key_scan_str);
                m_caps_on = false;
            }
            else
            {
                // The report received is not supported by this application. Do nothing.
            }
        }
    }
}
/**@brief Function for putting the chip into sleep mode.
 *
 * @note This function will not return.
 */
//static void sleep_mode_enter(void)
//{
//    ret_code_t err_code;

//    err_code = bsp_indication_set(BSP_INDICATE_IDLE);
//    APP_ERROR_CHECK(err_code);

//    // Prepare wakeup buttons.
//    err_code = bsp_btn_ble_sleep_mode_prepare();
//    APP_ERROR_CHECK(err_code);

//    // Go to system-off mode (this function will not return; wakeup will cause a reset).
//    err_code = sd_power_system_off();
//    APP_ERROR_CHECK(err_code);
//}


/**@brief Function for handling HID events.
 *
 * @details This function will be called for all HID events which are passed to the application.
 *
 * @param[in]   p_hids  HID service structure.
 * @param[in]   p_evt   Event received from the HID service.
 */
static void on_hids_evt(ble_hids_t * p_hids, ble_hids_evt_t * p_evt)
{
    switch (p_evt->evt_type)
    {
        case BLE_HIDS_EVT_BOOT_MODE_ENTERED:
            m_in_boot_mode = true;
            break;

        case BLE_HIDS_EVT_REPORT_MODE_ENTERED:
            m_in_boot_mode = false;
            break;

				case BLE_HIDS_EVT_REP_CHAR_WRITE:
            on_hid_rep_char_write(p_evt);
            break;
				
        case BLE_HIDS_EVT_NOTIF_ENABLED:
            break;

        default:
            // No implementation needed.
            break;
    }
}


/**@brief Function for handling advertising events.
 *
 * @details This function will be called for advertising events which are passed to the application.
 *
 * @param[in] ble_adv_evt  Advertising event.
 */
static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
{
    ret_code_t err_code;

    switch (ble_adv_evt)
    {
        case BLE_ADV_EVT_DIRECTED_HIGH_DUTY:
            NRF_LOG_INFO("Directed advertising.");
//            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_DIRECTED);
//            APP_ERROR_CHECK(err_code);
            break;

        case BLE_ADV_EVT_FAST:
            NRF_LOG_INFO("Fast advertising.");
//            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
//            APP_ERROR_CHECK(err_code);
            break;

        case BLE_ADV_EVT_SLOW:
            NRF_LOG_INFO("Slow advertising.");
#if SWIFT_PAIR_SUPPORTED == 1
            m_sp_advdata.p_manuf_specific_data = NULL;
            err_code = ble_advertising_advdata_update(&m_advertising, &m_sp_advdata, NULL);
            APP_ERROR_CHECK(err_code);
#endif
//            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_SLOW);
//            APP_ERROR_CHECK(err_code);
            break;

        case BLE_ADV_EVT_FAST_WHITELIST:
            NRF_LOG_INFO("Fast advertising with whitelist.");
//            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_WHITELIST);
//            APP_ERROR_CHECK(err_code);
            break;

        case BLE_ADV_EVT_SLOW_WHITELIST:
            NRF_LOG_INFO("Slow advertising with whitelist.");
//            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_WHITELIST);
//            APP_ERROR_CHECK(err_code);
            err_code = ble_advertising_restart_without_whitelist(&m_advertising);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_ADV_EVT_IDLE:
//            err_code = bsp_indication_set(BSP_INDICATE_IDLE);
//            APP_ERROR_CHECK(err_code);
//            sleep_mode_enter();
						NRF_LOG_INFO("Device stop advertising.");
						m_hid_data.ble_status = DEVICE_ADV_STOP;
            break;

        case BLE_ADV_EVT_WHITELIST_REQUEST:
        {
            ble_gap_addr_t whitelist_addrs[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
            ble_gap_irk_t  whitelist_irks[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
            uint32_t       addr_cnt = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
            uint32_t       irk_cnt  = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;

            err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt,
                                        whitelist_irks,  &irk_cnt);
            APP_ERROR_CHECK(err_code);
            NRF_LOG_DEBUG("pm_whitelist_get returns %d addr in whitelist and %d irk whitelist",
                           addr_cnt,
                           irk_cnt);

            // Set the correct identities list (no excluding peers with no Central Address Resolution).
            identities_set(PM_PEER_ID_LIST_SKIP_NO_IRK);

            // Apply the whitelist.
            err_code = ble_advertising_whitelist_reply(&m_advertising,
                                                       whitelist_addrs,
                                                       addr_cnt,
                                                       whitelist_irks,
                                                       irk_cnt);
            APP_ERROR_CHECK(err_code);
        }
        break;

        case BLE_ADV_EVT_PEER_ADDR_REQUEST:
        {
            pm_peer_data_bonding_t peer_bonding_data;

            // Only Give peer address if we have a handle to the bonded peer.
            if (m_peer_id != PM_PEER_ID_INVALID)
            {

                err_code = pm_peer_data_bonding_load(m_peer_id, &peer_bonding_data);
                if (err_code != NRF_ERROR_NOT_FOUND)
                {
                    APP_ERROR_CHECK(err_code);

                    // Manipulate identities to exclude peers with no Central Address Resolution.
                    identities_set(PM_PEER_ID_LIST_SKIP_ALL);

                    ble_gap_addr_t * p_peer_addr = &(peer_bonding_data.peer_ble_id.id_addr_info);
                    err_code = ble_advertising_peer_addr_reply(&m_advertising, p_peer_addr);
                    APP_ERROR_CHECK(err_code);
                }

            }
            break;
        }

        default:
            break;
    }
}


/**@brief Function for handling BLE events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 * @param[in]   p_context   Unused.
 */
static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
    ret_code_t err_code;

    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:
            NRF_LOG_INFO("Connected");				
//            err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
//            APP_ERROR_CHECK(err_code);

            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;

            err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
            APP_ERROR_CHECK(err_code);
						if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
						{
								m_hid_data.ble_status = DEVICE_CONNECTED;
						}
            break;

        case BLE_GAP_EVT_DISCONNECTED:
					
						if(m_hid_data.ble_status == DEVICE_LOW_POWER_WAIT)
						{
								sd_ble_gap_adv_stop(m_advertising.adv_handle);
								NRF_LOG_INFO("Disconnected low power stop adv.");
						}else
						{
								m_hid_data.ble_status = DEVICE_DISCONNECTED;
								NRF_LOG_INFO("Disconnected timeout.");
						}
            // LED indication will be changed when advertising starts.
						(void) buffer_dequeue(false);
						// Reset m_caps_on variable. Upon reconnect, the HID host will re-send the Output
            // report containing the Caps lock state.
            m_caps_on = false;
						m_hid_data.peer_manage = false;
            m_conn_handle = BLE_CONN_HANDLE_INVALID;
            break;

        case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
        {
            NRF_LOG_DEBUG("PHY update request.");
            ble_gap_phys_t const phys =
            {
                .rx_phys = BLE_GAP_PHY_AUTO,
                .tx_phys = BLE_GAP_PHY_AUTO,
            };
            err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
            APP_ERROR_CHECK(err_code);
        } break;
				
        case BLE_GATTS_EVT_HVN_TX_COMPLETE:
            // Send next key event
            (void) buffer_dequeue(true);
            break;

        case BLE_GATTC_EVT_TIMEOUT:
            // Disconnect on GATT Client timeout event.
            NRF_LOG_DEBUG("GATT Client Timeout.");
            err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GATTS_EVT_TIMEOUT:
            // Disconnect on GATT Server timeout event.
            NRF_LOG_DEBUG("GATT Server Timeout.");
            err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
            APP_ERROR_CHECK(err_code);
            break;

        default:
            // No implementation needed.
            break;
    }
}


/**@brief Function for initializing the BLE stack.
 *
 * @details Initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void)
{
    ret_code_t err_code;

    err_code = nrf_sdh_enable_request();
    APP_ERROR_CHECK(err_code);

    // Configure the BLE stack using the default settings.
    // Fetch the start address of the application RAM.
    uint32_t ram_start = 0;
    err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
    APP_ERROR_CHECK(err_code);

    // Enable BLE stack.
    err_code = nrf_sdh_ble_enable(&ram_start);
    APP_ERROR_CHECK(err_code);

    // Register a handler for BLE events.
    NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
}


/**@brief Function for the Peer Manager initialization.
 */
static void peer_manager_init(void)
{
    ble_gap_sec_params_t sec_param;
    ret_code_t           err_code;

    err_code = pm_init();
    APP_ERROR_CHECK(err_code);

    memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));

    // Security parameters to be used for all security procedures.
    sec_param.bond           = SEC_PARAM_BOND;
    sec_param.mitm           = SEC_PARAM_MITM;
    sec_param.lesc           = SEC_PARAM_LESC;
    sec_param.keypress       = SEC_PARAM_KEYPRESS;
    sec_param.io_caps        = SEC_PARAM_IO_CAPABILITIES;
    sec_param.oob            = SEC_PARAM_OOB;
    sec_param.min_key_size   = SEC_PARAM_MIN_KEY_SIZE;
    sec_param.max_key_size   = SEC_PARAM_MAX_KEY_SIZE;
    sec_param.kdist_own.enc  = 1;
    sec_param.kdist_own.id   = 1;
    sec_param.kdist_peer.enc = 1;
    sec_param.kdist_peer.id  = 1;

    err_code = pm_sec_params_set(&sec_param);
    APP_ERROR_CHECK(err_code);

    err_code = pm_register(pm_evt_handler);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the Advertising functionality.
 */
static void advertising_init(void)
{
    ret_code_t             err_code;
    uint8_t                adv_flags;
    ble_advertising_init_t init;

    memset(&init, 0, sizeof(init));

    adv_flags                            = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
    init.advdata.name_type               = BLE_ADVDATA_FULL_NAME;
    init.advdata.include_appearance      = true;
    init.advdata.flags                   = adv_flags;
    init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    init.advdata.uuids_complete.p_uuids  = m_adv_uuids;
#if SWIFT_PAIR_SUPPORTED == 1
    init.advdata.p_manuf_specific_data = &m_sp_manuf_advdata;
    memcpy(&m_sp_advdata, &init.advdata, sizeof(m_sp_advdata));
#endif

    init.config.ble_adv_whitelist_enabled          = true;
    init.config.ble_adv_directed_high_duty_enabled = true;
    init.config.ble_adv_directed_enabled           = false;
    init.config.ble_adv_directed_interval          = 0;
    init.config.ble_adv_directed_timeout           = 0;
    init.config.ble_adv_fast_enabled               = true;
    init.config.ble_adv_fast_interval              = APP_ADV_FAST_INTERVAL;
    init.config.ble_adv_fast_timeout               = APP_ADV_FAST_DURATION;
    init.config.ble_adv_slow_enabled               = true;
    init.config.ble_adv_slow_interval              = APP_ADV_SLOW_INTERVAL;
    init.config.ble_adv_slow_timeout               = APP_ADV_SLOW_DURATION;

    init.evt_handler   = on_adv_evt;
    init.error_handler = ble_advertising_error_handler;

    err_code = ble_advertising_init(&m_advertising, &init);
    APP_ERROR_CHECK(err_code);

    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}


/**@brief Function for the Event Scheduler initialization.
 */
static void scheduler_init(void)
{
    APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);
}


/**@brief Function for sending a Mouse Movement.
 *
 * @param[in]   x_delta   Horizontal movement.
 * @param[in]   y_delta   Vertical movement.
 */
void mouse_movement_send(int16_t x_delta, int16_t y_delta)
{
    ret_code_t err_code;

		if (m_hid_data.peer_manage == true)
		{
				if (m_in_boot_mode)
				{
						x_delta = MIN(x_delta, 0x00ff);
						y_delta = MIN(y_delta, 0x00ff);

						err_code = ble_hids_boot_mouse_inp_rep_send(&m_hids,
																												0x00,
																												(int8_t)x_delta,
																												(int8_t)y_delta,
																												0,
																												NULL,
																												m_conn_handle);
				}
				else
				{
						uint8_t buffer[INPUT_REP_MOVEMENT_LEN];

						APP_ERROR_CHECK_BOOL(INPUT_REP_MOVEMENT_LEN == 3);

						x_delta = MIN(x_delta, 0x0fff);
						y_delta = MIN(y_delta, 0x0fff);

						buffer[0] = x_delta & 0x00ff;
						buffer[1] = ((y_delta & 0x000f) << 4) | ((x_delta & 0x0f00) >> 8);
						buffer[2] = (y_delta & 0x0ff0) >> 4;

						err_code = ble_hids_inp_rep_send(&m_hids,
																						 INPUT_REP_MOVEMENT_INDEX,
																						 INPUT_REP_MOVEMENT_LEN,
																						 buffer,
																						 m_conn_handle);
				}

				if ((err_code != NRF_SUCCESS) &&
						(err_code != NRF_ERROR_INVALID_STATE) &&
						(err_code != NRF_ERROR_RESOURCES) &&
						(err_code != NRF_ERROR_BUSY) &&
						(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
					 )
				{
						APP_ERROR_HANDLER(err_code);
				}
				
		}
}
/**@brief Function for media data.
 * 
 * @param[in]   control --- hid media data
 *
*/  
void m_button_media_player_control(uint8_t control)
{
		uint32_t err_code;
		uint8_t buffer[1];
		buffer[0] = control;
		if (m_hid_data.peer_manage == true)
		{
				err_code = ble_hids_inp_rep_send( &m_hids,
																					INPUT_REP_MPLAYER_INDEX,
																					1,
																					buffer,
																					m_conn_handle);
				if(( err_code != NRF_SUCCESS ) &&
					 ( err_code != NRF_ERROR_INVALID_STATE ) &&
					 ( err_code != NRF_ERROR_RESOURCES ) &&
					 ( err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING ))
					{
						APP_ERROR_HANDLER( err_code );
					}
					
				buffer[0] = 0;
				err_code = ble_hids_inp_rep_send( &m_hids,
																					INPUT_REP_MPLAYER_INDEX,
																					1,
																					buffer,
																					m_conn_handle);
				if(( err_code != NRF_SUCCESS ) &&
					 ( err_code != NRF_ERROR_INVALID_STATE ) &&
					 ( err_code != NRF_ERROR_RESOURCES ) &&
					 ( err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING ))
					{
						APP_ERROR_HANDLER( err_code );
					}
		}
}
/**@brief Function for buttons
 * 
 * @param[in]   buttons --- hid media data
 *
 * @details click 1 2 4 左 右 中
            wheel  -127 to +127 上下滑动
						pan    -127 to +127 左右滑动
*/  
void mouse_buttons_send(int8_t click, int8_t wheel, int8_t pan)
{
		 uint32_t err_code;
	 
		uint8_t buffer[INPUT_REP_BUTTONS_LEN];
	
		if (m_hid_data.peer_manage == true)
		{
	 
				APP_ERROR_CHECK_BOOL(INPUT_REP_BUTTONS_LEN == 3);
				
//				NRF_LOG_INFO("mouse_buttons_send\r\n");
				buffer[0] = click;
				buffer[1] = wheel;
				buffer[2] = pan;
			 
				err_code = ble_hids_inp_rep_send(	&m_hids, 
																					INPUT_REP_BUTTONS_INDEX, 
																					INPUT_REP_BUTTONS_LEN, 
																					buffer,
																					m_conn_handle);
			 
					if ((err_code != NRF_SUCCESS) &&
							(err_code != NRF_ERROR_INVALID_STATE) &&
							(err_code != NRF_ERROR_RESOURCES) &&
							(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
						 )
					{
							APP_ERROR_HANDLER(err_code);
					}
		}
}
/**@brief Function for handling events from the BSP module.
 *
 * @param[in]   event   Event generated by button press.
 */
//static void bsp_event_handler(bsp_event_t event)
//{
//    ret_code_t err_code;

//    switch (event)
//    {
//        case BSP_EVENT_SLEEP:
//            sleep_mode_enter();
//            break;

//        case BSP_EVENT_DISCONNECT:
//            err_code = sd_ble_gap_disconnect(m_conn_handle,
//                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
//            if (err_code != NRF_ERROR_INVALID_STATE)
//            {
//                APP_ERROR_CHECK(err_code);
//            }
//            break;

//        case BSP_EVENT_WHITELIST_OFF:
//            if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
//            {
//                err_code = ble_advertising_restart_without_whitelist(&m_advertising);
//                if (err_code != NRF_ERROR_INVALID_STATE)
//                {
//                    APP_ERROR_CHECK(err_code);
//                }
//            }
//            break;

//        case BSP_EVENT_KEY_0:
//            if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
//            {
//                mouse_movement_send(-MOVEMENT_SPEED, 0);
//            }
//            break;

//        case BSP_EVENT_KEY_1:
//            if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
//            {
//                mouse_movement_send(0, -MOVEMENT_SPEED);
//            }
//            break;

//        case BSP_EVENT_KEY_2:
//            if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
//            {
//                mouse_movement_send(MOVEMENT_SPEED, 0);
//            }
//            break;

//        case BSP_EVENT_KEY_3:
//            if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
//            {
//                mouse_movement_send(0, MOVEMENT_SPEED);
//            }
//            break;

//        default:
//            break;
//    }
//}


/**@brief Function for initializing buttons and leds.
 *
 * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
 */
//static void buttons_leds_init(bool * p_erase_bonds)
//{
//    ret_code_t err_code;
//    bsp_event_t startup_event;

//    err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);

//    APP_ERROR_CHECK(err_code);

//    err_code = bsp_btn_ble_init(NULL, &startup_event);
//    APP_ERROR_CHECK(err_code);

//    *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
//}


/**@brief Function for initializing the nrf log module.
 */
static void log_init(void)
{
    ret_code_t err_code = NRF_LOG_INIT(NULL);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEFAULT_BACKENDS_INIT();
}


/**@brief Function for initializing power management.
 */
static void power_management_init(void)
{
    ret_code_t err_code;
    err_code = nrf_pwr_mgmt_init();
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling the idle state (main loop).
 *
 * @details If there is no pending log operation, then sleep until next the next event occurs.
 */
static void idle_state_handle(void)
{
    app_sched_execute();
    if (NRF_LOG_PROCESS() == false)
    {
        nrf_pwr_mgmt_run();
    }
}

/**@brief Function for start advertising.
 */
void m_adv_start(void)
{
		advertising_start(false);
}
/**@brief Function for disconnect.
 */
void m_adv_disconnect(void)
{
		ret_code_t err_code;
		if (m_conn_handle != BLE_CONN_HANDLE_INVALID)//连接状态
		{
				err_code = sd_ble_gap_disconnect(m_conn_handle,
																				 BLE_HCI_REMOTE_DEV_TERMINATION_DUE_TO_POWER_OFF);
				if (err_code != NRF_ERROR_INVALID_STATE)
				{
						APP_ERROR_CHECK(err_code);
				}
		}else//非连接状态
		{
				m_pwm_stop();
				err_code = sd_ble_gap_adv_stop(m_advertising.adv_handle);
				APP_ERROR_CHECK(err_code);
				NRF_LOG_INFO("Normal low power stop adv.");
		}
}
/**@brief Function for application main entry.
 */
int main(void)
{
    bool erase_bonds = false;
		ret_code_t err_code;
	
    // Initialize.
    log_init();
	
	  // Initialize the async SVCI interface to bootloader before any interrupts are enabled.
//    err_code = ble_dfu_buttonless_async_svci_init();
//    APP_ERROR_CHECK(err_code);
	
    timers_init();
		sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
//    buttons_leds_init(&erase_bonds);
    power_management_init();
    ble_stack_init();
    scheduler_init();
    gap_params_init();
    gatt_init();
    advertising_init();
    services_init();
//    sensor_simulator_init();
    conn_params_init();
		buffer_init();
    peer_manager_init();

    // Start execution. 
    NRF_LOG_INFO("HID Mouse example started.");
    timers_start();
		advertising_start(erase_bonds);

		m_platform_init();
		m_twi_init();       //TWI init
		m_pwm_common_init();//PWM init
		m_paw3003_check();
		m_button_init();
		m_paw3003_init();
		m_system_timer_init();
		m_led_timer_init();

    // Enter main loop.
    for (;;)
    {
				m_application_handle();
				m_led_handle();
        idle_state_handle();
    }
}


/**
 * @}
 */

Parents
  • Hello again. I took a look at your code and believe that your code is based on the HID Keyboard Application. I don't see any obvious problem with the part that handle Caps Lock behavior, as it is pretty much the same with the base example.

    Therefore I would like to clarify your situation and expectation first.

    1. Is your custom board an actual keyboard? If so, when you say you pushed the "CapsLk" key, is it on the custom board, or on another keyboard; and does the host OS receive the change?

    2. Have you modify the example code to log using RTT instead of UART yet? Simplest way to check would just be resetting the board, and see if RTT is printing anything.

    3. Is your expectation the same as documented in the following link? https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/ble_sdk_app_hids_keyboard.html
    The expectation should be that, when CapsLock is turned on, whether by your custom keyboard, or a different keyboard, or in the host OS itself, two things will happen. One, "CAPSON" and "capsof" are sent by application to the host (same as the "hello" behavior); two, "Caps Lock is turned Off/On" is printed to the logger, either UART or RTT.

  • Actually, when I download HID_Keyboard example in my custom board there will print "CAPS ON" or "CAPSOFF" after pressing "CapsLk" button.

    BTW, I have closed the bsp files.

    Here is the HID_Keyboard example codes.

    /**
     * Copyright (c) 2012 - 2020, Nordic Semiconductor ASA
     *
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without modification,
     * are permitted provided that the following conditions are met:
     *
     * 1. Redistributions of source code must retain the above copyright notice, this
     *    list of conditions and the following disclaimer.
     *
     * 2. Redistributions in binary form, except as embedded into a Nordic
     *    Semiconductor ASA integrated circuit in a product or a software update for
     *    such product, must reproduce the above copyright notice, this list of
     *    conditions and the following disclaimer in the documentation and/or other
     *    materials provided with the distribution.
     *
     * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
     *    contributors may be used to endorse or promote products derived from this
     *    software without specific prior written permission.
     *
     * 4. This software, with or without modification, must only be used with a
     *    Nordic Semiconductor ASA integrated circuit.
     *
     * 5. Any software provided in binary form under this license must not be reverse
     *    engineered, decompiled, modified and/or disassembled.
     *
     * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
     * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
     * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
     * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
     * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     */
    /** @file
     *
     * @defgroup ble_sdk_app_hids_keyboard_main main.c
     * @{
     * @ingroup ble_sdk_app_hids_keyboard
     * @brief HID Keyboard Sample Application main file.
     *
     * This file contains is the source code for a sample application using the HID, Battery and Device
     * Information Services for implementing a simple keyboard functionality.
     * Pressing Button 0 will send text 'hello' to the connected peer. On receiving output report,
     * it toggles the state of LED 2 on the mother board based on whether or not Caps Lock is on.
     * This application uses the @ref app_scheduler.
     *
     * Also it would accept pairing requests from any peer device.
     */
    
    #include <stdint.h>
    #include <string.h>
    #include "nordic_common.h"
    #include "nrf.h"
    #include "nrf_assert.h"
    #include "app_error.h"
    #include "ble.h"
    #include "ble_err.h"
    #include "ble_hci.h"
    #include "ble_srv_common.h"
    #include "ble_advertising.h"
    #include "ble_advdata.h"
    #include "ble_hids.h"
    #include "ble_bas.h"
    #include "ble_dis.h"
    #include "ble_conn_params.h"
    #include "sensorsim.h"
    #include "bsp_btn_ble.h"
    #include "app_scheduler.h"
    #include "nrf_sdh.h"
    #include "nrf_sdh_soc.h"
    #include "nrf_sdh_ble.h"
    #include "app_timer.h"
    #include "peer_manager.h"
    #include "fds.h"
    #include "ble_conn_state.h"
    #include "nrf_ble_gatt.h"
    #include "nrf_ble_qwr.h"
    #include "nrf_pwr_mgmt.h"
    #include "peer_manager_handler.h"
    
    #include "nrf_log.h"
    #include "nrf_log_ctrl.h"
    #include "nrf_log_default_backends.h"
    
    
    #define SHIFT_BUTTON_ID                     1                                          /**< Button used as 'SHIFT' Key. */
    
    #define DEVICE_NAME                         "Nordic_Keyboard"                          /**< Name of device. Will be included in the advertising data. */
    #define MANUFACTURER_NAME                   "NordicSemiconductor"                      /**< Manufacturer. Will be passed to Device Information Service. */
    
    #define APP_BLE_OBSERVER_PRIO               3                                          /**< Application's BLE observer priority. You shouldn't need to modify this value. */
    #define APP_BLE_CONN_CFG_TAG                1                                          /**< A tag identifying the SoftDevice BLE configuration. */
    
    #define BATTERY_LEVEL_MEAS_INTERVAL         APP_TIMER_TICKS(2000)                      /**< Battery level measurement interval (ticks). */
    #define MIN_BATTERY_LEVEL                   81                                         /**< Minimum simulated battery level. */
    #define MAX_BATTERY_LEVEL                   100                                        /**< Maximum simulated battery level. */
    #define BATTERY_LEVEL_INCREMENT             1                                          /**< Increment between each simulated battery level measurement. */
    
    #define PNP_ID_VENDOR_ID_SOURCE             0x02                                       /**< Vendor ID Source. */
    #define PNP_ID_VENDOR_ID                    0x1915                                     /**< Vendor ID. */
    #define PNP_ID_PRODUCT_ID                   0xEEEE                                     /**< Product ID. */
    #define PNP_ID_PRODUCT_VERSION              0x0001                                     /**< Product Version. */
    
    #define APP_ADV_FAST_INTERVAL               0x0028                                     /**< Fast advertising interval (in units of 0.625 ms. This value corresponds to 25 ms.). */
    #define APP_ADV_SLOW_INTERVAL               0x0C80                                     /**< Slow advertising interval (in units of 0.625 ms. This value corrsponds to 2 seconds). */
    
    #define APP_ADV_FAST_DURATION               3000                                       /**< The advertising duration of fast advertising in units of 10 milliseconds. */
    #define APP_ADV_SLOW_DURATION               18000                                      /**< The advertising duration of slow advertising in units of 10 milliseconds. */
    
    
    /*lint -emacro(524, MIN_CONN_INTERVAL) // Loss of precision */
    #define MIN_CONN_INTERVAL                   MSEC_TO_UNITS(7.5, UNIT_1_25_MS)           /**< Minimum connection interval (7.5 ms) */
    #define MAX_CONN_INTERVAL                   MSEC_TO_UNITS(30, UNIT_1_25_MS)            /**< Maximum connection interval (30 ms). */
    #define SLAVE_LATENCY                       6                                          /**< Slave latency. */
    #define CONN_SUP_TIMEOUT                    MSEC_TO_UNITS(430, UNIT_10_MS)             /**< Connection supervisory timeout (430 ms). */
    
    #define FIRST_CONN_PARAMS_UPDATE_DELAY      APP_TIMER_TICKS(5000)                      /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
    #define NEXT_CONN_PARAMS_UPDATE_DELAY       APP_TIMER_TICKS(30000)                     /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
    #define MAX_CONN_PARAMS_UPDATE_COUNT        3                                          /**< Number of attempts before giving up the connection parameter negotiation. */
    
    #define SEC_PARAM_BOND                      1                                          /**< Perform bonding. */
    #define SEC_PARAM_MITM                      0                                          /**< Man In The Middle protection not required. */
    #define SEC_PARAM_LESC                      0                                          /**< LE Secure Connections not enabled. */
    #define SEC_PARAM_KEYPRESS                  0                                          /**< Keypress notifications not enabled. */
    #define SEC_PARAM_IO_CAPABILITIES           BLE_GAP_IO_CAPS_NONE                       /**< No I/O capabilities. */
    #define SEC_PARAM_OOB                       0                                          /**< Out Of Band data not available. */
    #define SEC_PARAM_MIN_KEY_SIZE              7                                          /**< Minimum encryption key size. */
    #define SEC_PARAM_MAX_KEY_SIZE              16                                         /**< Maximum encryption key size. */
    
    #define OUTPUT_REPORT_INDEX                 0                                          /**< Index of Output Report. */
    #define OUTPUT_REPORT_MAX_LEN               1                                          /**< Maximum length of Output Report. */
    #define INPUT_REPORT_KEYS_INDEX             0                                          /**< Index of Input Report. */
    #define OUTPUT_REPORT_BIT_MASK_CAPS_LOCK    0x02                                       /**< CAPS LOCK bit in Output Report (based on 'LED Page (0x08)' of the Universal Serial Bus HID Usage Tables). */
    #define INPUT_REP_REF_ID                    0                                          /**< Id of reference to Keyboard Input Report. */
    #define OUTPUT_REP_REF_ID                   0                                          /**< Id of reference to Keyboard Output Report. */
    #define FEATURE_REP_REF_ID                  0                                          /**< ID of reference to Keyboard Feature Report. */
    #define FEATURE_REPORT_MAX_LEN              2                                          /**< Maximum length of Feature Report. */
    #define FEATURE_REPORT_INDEX                0                                          /**< Index of Feature Report. */
    
    #define MAX_BUFFER_ENTRIES                  5                                          /**< Number of elements that can be enqueued */
    
    #define BASE_USB_HID_SPEC_VERSION           0x0101                                     /**< Version number of base USB HID Specification implemented by this application. */
    
    #define INPUT_REPORT_KEYS_MAX_LEN           8                                          /**< Maximum length of the Input Report characteristic. */
    
    #define DEAD_BEEF                           0xDEADBEEF                                 /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
    
    #define SCHED_MAX_EVENT_DATA_SIZE           APP_TIMER_SCHED_EVENT_DATA_SIZE            /**< Maximum size of scheduler events. */
    #ifdef SVCALL_AS_NORMAL_FUNCTION
    #define SCHED_QUEUE_SIZE                    20                                         /**< Maximum number of events in the scheduler queue. More is needed in case of Serialization. */
    #else
    #define SCHED_QUEUE_SIZE                    10                                         /**< Maximum number of events in the scheduler queue. */
    #endif
    
    #define MODIFIER_KEY_POS                    0                                          /**< Position of the modifier byte in the Input Report. */
    #define SCAN_CODE_POS                       2                                          /**< The start position of the key scan code in a HID Report. */
    #define SHIFT_KEY_CODE                      0x02                                       /**< Key code indicating the press of the Shift Key. */
    
    #define MAX_KEYS_IN_ONE_REPORT              (INPUT_REPORT_KEYS_MAX_LEN - SCAN_CODE_POS)/**< Maximum number of key presses that can be sent in one Input Report. */
    
    
    /**Buffer queue access macros
     *
     * @{ */
    /** Initialization of buffer list */
    #define BUFFER_LIST_INIT()     \
        do                         \
        {                          \
            buffer_list.rp    = 0; \
            buffer_list.wp    = 0; \
            buffer_list.count = 0; \
        } while (0)
    
    /** Provide status of data list is full or not */
    #define BUFFER_LIST_FULL() \
        ((MAX_BUFFER_ENTRIES == buffer_list.count - 1) ? true : false)
    
    /** Provides status of buffer list is empty or not */
    #define BUFFER_LIST_EMPTY() \
        ((0 == buffer_list.count) ? true : false)
    
    #define BUFFER_ELEMENT_INIT(i)                 \
        do                                         \
        {                                          \
            buffer_list.buffer[(i)].p_data = NULL; \
        } while (0)
    
    /** @} */
    
    /** Abstracts buffer element */
    typedef struct hid_key_buffer
    {
        uint8_t      data_offset; /**< Max Data that can be buffered for all entries */
        uint8_t      data_len;    /**< Total length of data */
        uint8_t    * p_data;      /**< Scanned key pattern */
        ble_hids_t * p_instance;  /**< Identifies peer and service instance */
    } buffer_entry_t;
    
    STATIC_ASSERT(sizeof(buffer_entry_t) % 4 == 0);
    
    /** Circular buffer list */
    typedef struct
    {
        buffer_entry_t buffer[MAX_BUFFER_ENTRIES]; /**< Maximum number of entries that can enqueued in the list */
        uint8_t        rp;                         /**< Index to the read location */
        uint8_t        wp;                         /**< Index to write location */
        uint8_t        count;                      /**< Number of elements in the list */
    } buffer_list_t;
    
    STATIC_ASSERT(sizeof(buffer_list_t) % 4 == 0);
    
    
    APP_TIMER_DEF(m_battery_timer_id);                                  /**< Battery timer. */
    BLE_HIDS_DEF(m_hids,                                                /**< Structure used to identify the HID service. */
                 NRF_SDH_BLE_TOTAL_LINK_COUNT,
                 INPUT_REPORT_KEYS_MAX_LEN,
                 OUTPUT_REPORT_MAX_LEN,
                 FEATURE_REPORT_MAX_LEN);
    BLE_BAS_DEF(m_bas);                                                 /**< Structure used to identify the battery service. */
    NRF_BLE_GATT_DEF(m_gatt);                                           /**< GATT module instance. */
    NRF_BLE_QWR_DEF(m_qwr);                                             /**< Context for the Queued Write module.*/
    BLE_ADVERTISING_DEF(m_advertising);                                 /**< Advertising module instance. */
    
    static bool              m_in_boot_mode = false;                    /**< Current protocol mode. */
    static uint16_t          m_conn_handle  = BLE_CONN_HANDLE_INVALID;  /**< Handle of the current connection. */
    static sensorsim_cfg_t   m_battery_sim_cfg;                         /**< Battery Level sensor simulator configuration. */
    static sensorsim_state_t m_battery_sim_state;                       /**< Battery Level sensor simulator state. */
    static bool              m_caps_on = false;                         /**< Variable to indicate if Caps Lock is turned on. */
    static pm_peer_id_t      m_peer_id;                                 /**< Device reference handle to the current bonded central. */
    static buffer_list_t     buffer_list;                               /**< List to enqueue not just data to be sent, but also related information like the handle, connection handle etc */
    
    static ble_uuid_t m_adv_uuids[] = {{BLE_UUID_HUMAN_INTERFACE_DEVICE_SERVICE, BLE_UUID_TYPE_BLE}};
    
    static uint8_t m_sample_key_press_scan_str[] = /**< Key pattern to be sent when the key press button has been pushed. */
    {
        0x51,       /* Key h */
        0x08,       /* Key e */
        0x0f,       /* Key l */
        0x0f,       /* Key l */
        0x12,       /* Key o */
        0x28        /* Key Return */
    };
    
    static uint8_t m_caps_on_key_scan_str[] = /**< Key pattern to be sent when the output report has been written with the CAPS LOCK bit set. */
    {
        0x06,       /* Key C */
        0x04,       /* Key a */
        0x13,       /* Key p */
        0x16,       /* Key s */
        0x12,       /* Key o */
        0x11,       /* Key n */
    };
    
    static uint8_t m_caps_off_key_scan_str[] = /**< Key pattern to be sent when the output report has been written with the CAPS LOCK bit cleared. */
    {
        0x06,       /* Key C */
        0x04,       /* Key a */
        0x13,       /* Key p */
        0x16,       /* Key s */
        0x12,       /* Key o */
        0x09,       /* Key f */
    };
    
    
    static void keys_send(uint8_t key_pattern_len, uint8_t * p_key_pattern);
    static void on_hids_evt(ble_hids_t * p_hids, ble_hids_evt_t * p_evt);
    
    /**@brief Callback function for asserts in the SoftDevice.
     *
     * @details This function will be called in case of an assert in the SoftDevice.
     *
     * @warning This handler is an example only and does not fit a final product. You need to analyze
     *          how your product is supposed to react in case of Assert.
     * @warning On assert from the SoftDevice, the system can only recover on reset.
     *
     * @param[in]   line_num   Line number of the failing ASSERT call.
     * @param[in]   file_name  File name of the failing ASSERT call.
     */
    void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
    {
        app_error_handler(DEAD_BEEF, line_num, p_file_name);
    }
    
    
    /**@brief Function for setting filtered whitelist.
     *
     * @param[in] skip  Filter passed to @ref pm_peer_id_list.
     */
    static void whitelist_set(pm_peer_id_list_skip_t skip)
    {
        pm_peer_id_t peer_ids[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
        uint32_t     peer_id_count = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
    
        ret_code_t err_code = pm_peer_id_list(peer_ids, &peer_id_count, PM_PEER_ID_INVALID, skip);
        APP_ERROR_CHECK(err_code);
    
        NRF_LOG_INFO("\tm_whitelist_peer_cnt %d, MAX_PEERS_WLIST %d",
                       peer_id_count + 1,
                       BLE_GAP_WHITELIST_ADDR_MAX_COUNT);
    
        err_code = pm_whitelist_set(peer_ids, peer_id_count);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for setting filtered device identities.
     *
     * @param[in] skip  Filter passed to @ref pm_peer_id_list.
     */
    static void identities_set(pm_peer_id_list_skip_t skip)
    {
        pm_peer_id_t peer_ids[BLE_GAP_DEVICE_IDENTITIES_MAX_COUNT];
        uint32_t     peer_id_count = BLE_GAP_DEVICE_IDENTITIES_MAX_COUNT;
    
        ret_code_t err_code = pm_peer_id_list(peer_ids, &peer_id_count, PM_PEER_ID_INVALID, skip);
        APP_ERROR_CHECK(err_code);
    
        err_code = pm_device_identities_list_set(peer_ids, peer_id_count);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Clear bond information from persistent storage.
     */
    static void delete_bonds(void)
    {
        ret_code_t err_code;
    
        NRF_LOG_INFO("Erase bonds!");
    
        err_code = pm_peers_delete();
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for starting advertising.
     */
    static void advertising_start(bool erase_bonds)
    {
        if (erase_bonds == true)
        {
            delete_bonds();
            // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
        }
        else
        {
            whitelist_set(PM_PEER_ID_LIST_SKIP_NO_ID_ADDR);
    
            ret_code_t ret = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
            APP_ERROR_CHECK(ret);
        }
    }
    
    
    /**@brief Function for handling Peer Manager events.
     *
     * @param[in] p_evt  Peer Manager event.
     */
    static void pm_evt_handler(pm_evt_t const * p_evt)
    {
        pm_handler_on_pm_evt(p_evt);
        pm_handler_flash_clean(p_evt);
    
        switch (p_evt->evt_id)
        {
            case PM_EVT_CONN_SEC_SUCCEEDED:
                m_peer_id = p_evt->peer_id;
                break;
    
            case PM_EVT_PEERS_DELETE_SUCCEEDED:
                advertising_start(false);
                break;
    
            case PM_EVT_PEER_DATA_UPDATE_SUCCEEDED:
                if (     p_evt->params.peer_data_update_succeeded.flash_changed
                     && (p_evt->params.peer_data_update_succeeded.data_id == PM_PEER_DATA_ID_BONDING))
                {
                    NRF_LOG_INFO("New Bond, add the peer to the whitelist if possible");
                    // Note: You should check on what kind of white list policy your application should use.
    
                    whitelist_set(PM_PEER_ID_LIST_SKIP_NO_ID_ADDR);
                }
                break;
    
            default:
                break;
        }
    }
    
    
    /**@brief Function for handling Service errors.
     *
     * @details A pointer to this function will be passed to each service which may need to inform the
     *          application about an error.
     *
     * @param[in]   nrf_error   Error code containing information about what went wrong.
     */
    static void service_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for handling advertising errors.
     *
     * @param[in] nrf_error  Error code containing information about what went wrong.
     */
    static void ble_advertising_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for performing a battery measurement, and update the Battery Level characteristic in the Battery Service.
     */
    static void battery_level_update(void)
    {
        ret_code_t err_code;
        uint8_t  battery_level;
    
    		static uint8_t * p_key = m_sample_key_press_scan_str;
        static uint8_t   size  = 0;
    
        battery_level = (uint8_t)sensorsim_measure(&m_battery_sim_state, &m_battery_sim_cfg);
    
        err_code = ble_bas_battery_level_update(&m_bas, battery_level, BLE_CONN_HANDLE_ALL);
        if ((err_code != NRF_SUCCESS) &&
            (err_code != NRF_ERROR_BUSY) &&
            (err_code != NRF_ERROR_RESOURCES) &&
            (err_code != NRF_ERROR_FORBIDDEN) &&
            (err_code != NRF_ERROR_INVALID_STATE) &&
            (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
           )
        {
            APP_ERROR_HANDLER(err_code);
        }
    		
    		
    		if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
    		{
    				keys_send(1, p_key);
    				p_key++;
    				size++;
    				if (size == MAX_KEYS_IN_ONE_REPORT)
    				{
    						p_key = m_sample_key_press_scan_str;
    						size  = 0;
    				}
    		}
    }
    
    
    /**@brief Function for handling the Battery measurement timer timeout.
     *
     * @details This function will be called each time the battery level measurement timer expires.
     *
     * @param[in]   p_context   Pointer used for passing some arbitrary information (context) from the
     *                          app_start_timer() call to the timeout handler.
     */
    static void battery_level_meas_timeout_handler(void * p_context)
    {
        UNUSED_PARAMETER(p_context);
        battery_level_update();
    }
    
    
    /**@brief Function for the Timer initialization.
     *
     * @details Initializes the timer module.
     */
    static void timers_init(void)
    {
        ret_code_t err_code;
    
        err_code = app_timer_init();
        APP_ERROR_CHECK(err_code);
    
        // Create battery timer.
        err_code = app_timer_create(&m_battery_timer_id,
                                    APP_TIMER_MODE_REPEATED,
                                    battery_level_meas_timeout_handler);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for the GAP initialization.
     *
     * @details This function sets up all the necessary GAP (Generic Access Profile) parameters of the
     *          device including the device name, appearance, and the preferred connection parameters.
     */
    static void gap_params_init(void)
    {
        ret_code_t              err_code;
        ble_gap_conn_params_t   gap_conn_params;
        ble_gap_conn_sec_mode_t sec_mode;
    
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
    
        err_code = sd_ble_gap_device_name_set(&sec_mode,
                                              (const uint8_t *)DEVICE_NAME,
                                              strlen(DEVICE_NAME));
        APP_ERROR_CHECK(err_code);
    
        err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_HID_KEYBOARD);
        APP_ERROR_CHECK(err_code);
    
        memset(&gap_conn_params, 0, sizeof(gap_conn_params));
    
        gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
        gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
        gap_conn_params.slave_latency     = SLAVE_LATENCY;
        gap_conn_params.conn_sup_timeout  = CONN_SUP_TIMEOUT;
    
        err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the GATT module.
     */
    static void gatt_init(void)
    {
        ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling Queued Write Module errors.
     *
     * @details A pointer to this function will be passed to each service which may need to inform the
     *          application about an error.
     *
     * @param[in]   nrf_error   Error code containing information about what went wrong.
     */
    static void nrf_qwr_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for initializing the Queued Write Module.
     */
    static void qwr_init(void)
    {
        ret_code_t         err_code;
        nrf_ble_qwr_init_t qwr_init_obj = {0};
    
        qwr_init_obj.error_handler = nrf_qwr_error_handler;
    
        err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing Device Information Service.
     */
    static void dis_init(void)
    {
        ret_code_t       err_code;
        ble_dis_init_t   dis_init_obj;
        ble_dis_pnp_id_t pnp_id;
    
        pnp_id.vendor_id_source = PNP_ID_VENDOR_ID_SOURCE;
        pnp_id.vendor_id        = PNP_ID_VENDOR_ID;
        pnp_id.product_id       = PNP_ID_PRODUCT_ID;
        pnp_id.product_version  = PNP_ID_PRODUCT_VERSION;
    
        memset(&dis_init_obj, 0, sizeof(dis_init_obj));
    
        ble_srv_ascii_to_utf8(&dis_init_obj.manufact_name_str, MANUFACTURER_NAME);
        dis_init_obj.p_pnp_id = &pnp_id;
    
        dis_init_obj.dis_char_rd_sec = SEC_JUST_WORKS;
    
        err_code = ble_dis_init(&dis_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing Battery Service.
     */
    static void bas_init(void)
    {
        ret_code_t     err_code;
        ble_bas_init_t bas_init_obj;
    
        memset(&bas_init_obj, 0, sizeof(bas_init_obj));
    
        bas_init_obj.evt_handler          = NULL;
        bas_init_obj.support_notification = true;
        bas_init_obj.p_report_ref         = NULL;
        bas_init_obj.initial_batt_level   = 100;
    
        bas_init_obj.bl_rd_sec        = SEC_JUST_WORKS;
        bas_init_obj.bl_cccd_wr_sec   = SEC_JUST_WORKS;
        bas_init_obj.bl_report_rd_sec = SEC_JUST_WORKS;
    
        err_code = ble_bas_init(&m_bas, &bas_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing HID Service.
     */
    static void hids_init(void)
    {
        ret_code_t                    err_code;
        ble_hids_init_t               hids_init_obj;
        ble_hids_inp_rep_init_t     * p_input_report;
        ble_hids_outp_rep_init_t    * p_output_report;
        ble_hids_feature_rep_init_t * p_feature_report;
        uint8_t                       hid_info_flags;
    
        static ble_hids_inp_rep_init_t     input_report_array[1];
        static ble_hids_outp_rep_init_t    output_report_array[1];
        static ble_hids_feature_rep_init_t feature_report_array[1];
        static uint8_t                     report_map_data[] =
        {
            0x05, 0x01,       // Usage Page (Generic Desktop)
            0x09, 0x06,       // Usage (Keyboard)
            0xA1, 0x01,       // Collection (Application)
            0x05, 0x07,       // Usage Page (Key Codes)
            0x19, 0xe0,       // Usage Minimum (224)
            0x29, 0xe7,       // Usage Maximum (231)
            0x15, 0x00,       // Logical Minimum (0)
            0x25, 0x01,       // Logical Maximum (1)
            0x75, 0x01,       // Report Size (1)
            0x95, 0x08,       // Report Count (8)
            0x81, 0x02,       // Input (Data, Variable, Absolute)
    
            0x95, 0x01,       // Report Count (1)
            0x75, 0x08,       // Report Size (8)
            0x81, 0x01,       // Input (Constant) reserved byte(1)
    
            0x95, 0x05,       // Report Count (5)
            0x75, 0x01,       // Report Size (1)
            0x05, 0x08,       // Usage Page (Page# for LEDs)
            0x19, 0x01,       // Usage Minimum (1)
            0x29, 0x05,       // Usage Maximum (5)
            0x91, 0x02,       // Output (Data, Variable, Absolute), Led report
            0x95, 0x01,       // Report Count (1)
            0x75, 0x03,       // Report Size (3)
            0x91, 0x01,       // Output (Data, Variable, Absolute), Led report padding
    
            0x95, 0x06,       // Report Count (6)
            0x75, 0x08,       // Report Size (8)
            0x15, 0x00,       // Logical Minimum (0)
            0x25, 0x65,       // Logical Maximum (101)
            0x05, 0x07,       // Usage Page (Key codes)
            0x19, 0x00,       // Usage Minimum (0)
            0x29, 0x65,       // Usage Maximum (101)
            0x81, 0x00,       // Input (Data, Array) Key array(6 bytes)
    
            0x09, 0x05,       // Usage (Vendor Defined)
            0x15, 0x00,       // Logical Minimum (0)
            0x26, 0xFF, 0x00, // Logical Maximum (255)
            0x75, 0x08,       // Report Size (8 bit)
            0x95, 0x02,       // Report Count (2)
            0xB1, 0x02,       // Feature (Data, Variable, Absolute)
    
            0xC0              // End Collection (Application)
        };
    
        memset((void *)input_report_array, 0, sizeof(ble_hids_inp_rep_init_t));
        memset((void *)output_report_array, 0, sizeof(ble_hids_outp_rep_init_t));
        memset((void *)feature_report_array, 0, sizeof(ble_hids_feature_rep_init_t));
    
        // Initialize HID Service
        p_input_report                      = &input_report_array[INPUT_REPORT_KEYS_INDEX];
        p_input_report->max_len             = INPUT_REPORT_KEYS_MAX_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_output_report                      = &output_report_array[OUTPUT_REPORT_INDEX];
        p_output_report->max_len             = OUTPUT_REPORT_MAX_LEN;
        p_output_report->rep_ref.report_id   = OUTPUT_REP_REF_ID;
        p_output_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_OUTPUT;
    
        p_output_report->sec.wr = SEC_JUST_WORKS;
        p_output_report->sec.rd = SEC_JUST_WORKS;
    
        p_feature_report                      = &feature_report_array[FEATURE_REPORT_INDEX];
        p_feature_report->max_len             = FEATURE_REPORT_MAX_LEN;
        p_feature_report->rep_ref.report_id   = FEATURE_REP_REF_ID;
        p_feature_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_FEATURE;
    
        p_feature_report->sec.rd              = SEC_JUST_WORKS;
        p_feature_report->sec.wr              = SEC_JUST_WORKS;
    
        hid_info_flags = HID_INFO_FLAG_REMOTE_WAKE_MSK | HID_INFO_FLAG_NORMALLY_CONNECTABLE_MSK;
    
        memset(&hids_init_obj, 0, sizeof(hids_init_obj));
    
        hids_init_obj.evt_handler                    = on_hids_evt;
        hids_init_obj.error_handler                  = service_error_handler;
        hids_init_obj.is_kb                          = true;
        hids_init_obj.is_mouse                       = false;
        hids_init_obj.inp_rep_count                  = 1;
        hids_init_obj.p_inp_rep_array                = input_report_array;
        hids_init_obj.outp_rep_count                 = 1;
        hids_init_obj.p_outp_rep_array               = output_report_array;
        hids_init_obj.feature_rep_count              = 1;
        hids_init_obj.p_feature_rep_array            = feature_report_array;
        hids_init_obj.rep_map.data_len               = sizeof(report_map_data);
        hids_init_obj.rep_map.p_data                 = report_map_data;
        hids_init_obj.hid_information.bcd_hid        = BASE_USB_HID_SPEC_VERSION;
        hids_init_obj.hid_information.b_country_code = 0;
        hids_init_obj.hid_information.flags          = hid_info_flags;
        hids_init_obj.included_services_count        = 0;
        hids_init_obj.p_included_services_array      = NULL;
    
        hids_init_obj.rep_map.rd_sec         = SEC_JUST_WORKS;
        hids_init_obj.hid_information.rd_sec = SEC_JUST_WORKS;
    
        hids_init_obj.boot_kb_inp_rep_sec.cccd_wr = SEC_JUST_WORKS;
        hids_init_obj.boot_kb_inp_rep_sec.rd      = SEC_JUST_WORKS;
    
        hids_init_obj.boot_kb_outp_rep_sec.rd = SEC_JUST_WORKS;
        hids_init_obj.boot_kb_outp_rep_sec.wr = SEC_JUST_WORKS;
    
        hids_init_obj.protocol_mode_rd_sec = SEC_JUST_WORKS;
        hids_init_obj.protocol_mode_wr_sec = SEC_JUST_WORKS;
        hids_init_obj.ctrl_point_wr_sec    = SEC_JUST_WORKS;
    
        err_code = ble_hids_init(&m_hids, &hids_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing services that will be used by the application.
     */
    static void services_init(void)
    {
        qwr_init();
        dis_init();
        bas_init();
        hids_init();
    }
    
    
    /**@brief Function for initializing the battery sensor simulator.
     */
    static void sensor_simulator_init(void)
    {
        m_battery_sim_cfg.min          = MIN_BATTERY_LEVEL;
        m_battery_sim_cfg.max          = MAX_BATTERY_LEVEL;
        m_battery_sim_cfg.incr         = BATTERY_LEVEL_INCREMENT;
        m_battery_sim_cfg.start_at_max = true;
    
        sensorsim_init(&m_battery_sim_state, &m_battery_sim_cfg);
    }
    
    
    /**@brief Function for handling a Connection Parameters error.
     *
     * @param[in]   nrf_error   Error code containing information about what went wrong.
     */
    static void conn_params_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for initializing the Connection Parameters module.
     */
    static void conn_params_init(void)
    {
        ret_code_t             err_code;
        ble_conn_params_init_t cp_init;
    
        memset(&cp_init, 0, sizeof(cp_init));
    
        cp_init.p_conn_params                  = NULL;
        cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
        cp_init.next_conn_params_update_delay  = NEXT_CONN_PARAMS_UPDATE_DELAY;
        cp_init.max_conn_params_update_count   = MAX_CONN_PARAMS_UPDATE_COUNT;
        cp_init.start_on_notify_cccd_handle    = BLE_GATT_HANDLE_INVALID;
        cp_init.disconnect_on_fail             = false;
        cp_init.evt_handler                    = NULL;
        cp_init.error_handler                  = conn_params_error_handler;
    
        err_code = ble_conn_params_init(&cp_init);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for starting timers.
     */
    static void timers_start(void)
    {
        ret_code_t err_code;
    
        err_code = app_timer_start(m_battery_timer_id, BATTERY_LEVEL_MEAS_INTERVAL, NULL);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief   Function for transmitting a key scan Press & Release Notification.
     *
     * @warning This handler is an example only. You need to analyze how you wish to send the key
     *          release.
     *
     * @param[in]  p_instance     Identifies the service for which Key Notifications are requested.
     * @param[in]  p_key_pattern  Pointer to key pattern.
     * @param[in]  pattern_len    Length of key pattern. 0 < pattern_len < 7.
     * @param[in]  pattern_offset Offset applied to Key Pattern for transmission.
     * @param[out] actual_len     Provides actual length of Key Pattern transmitted, making buffering of
     *                            rest possible if needed.
     * @return     NRF_SUCCESS on success, NRF_ERROR_RESOURCES in case transmission could not be
     *             completed due to lack of transmission buffer or other error codes indicating reason
     *             for failure.
     *
     * @note       In case of NRF_ERROR_RESOURCES, remaining pattern that could not be transmitted
     *             can be enqueued \ref buffer_enqueue function.
     *             In case a pattern of 'cofFEe' is the p_key_pattern, with pattern_len as 6 and
     *             pattern_offset as 0, the notifications as observed on the peer side would be
     *             1>    'c', 'o', 'f', 'F', 'E', 'e'
     *             2>    -  , 'o', 'f', 'F', 'E', 'e'
     *             3>    -  ,   -, 'f', 'F', 'E', 'e'
     *             4>    -  ,   -,   -, 'F', 'E', 'e'
     *             5>    -  ,   -,   -,   -, 'E', 'e'
     *             6>    -  ,   -,   -,   -,   -, 'e'
     *             7>    -  ,   -,   -,   -,   -,  -
     *             Here, '-' refers to release, 'c' refers to the key character being transmitted.
     *             Therefore 7 notifications will be sent.
     *             In case an offset of 4 was provided, the pattern notifications sent will be from 5-7
     *             will be transmitted.
     */
    static uint32_t send_key_scan_press_release(ble_hids_t * p_hids,
                                                uint8_t    * p_key_pattern,
                                                uint16_t     pattern_len,
                                                uint16_t     pattern_offset,
                                                uint16_t   * p_actual_len)
    {
        ret_code_t err_code;
        uint16_t offset;
        uint16_t data_len;
        uint8_t  data[INPUT_REPORT_KEYS_MAX_LEN];
    
        // HID Report Descriptor enumerates an array of size 6, the pattern hence shall not be any
        // longer than this.
        STATIC_ASSERT((INPUT_REPORT_KEYS_MAX_LEN - 2) == 6);
    
        ASSERT(pattern_len <= (INPUT_REPORT_KEYS_MAX_LEN - 2));
    
        offset   = pattern_offset;
        data_len = pattern_len;
    
        do
        {
            // Reset the data buffer.
            memset(data, 0, sizeof(data));
    
            // Copy the scan code.
            memcpy(data + SCAN_CODE_POS + offset, p_key_pattern + offset, data_len - offset);
    
    //        if (bsp_button_is_pressed(SHIFT_BUTTON_ID))
    //        {
    //            data[MODIFIER_KEY_POS] |= SHIFT_KEY_CODE;
    //        }
    //				data[MODIFIER_KEY_POS] |= SHIFT_KEY_CODE;
    
            if (!m_in_boot_mode)
            {
                err_code = ble_hids_inp_rep_send(p_hids,
                                                 INPUT_REPORT_KEYS_INDEX,
                                                 INPUT_REPORT_KEYS_MAX_LEN,
                                                 data,
                                                 m_conn_handle);
            }
            else
            {
                err_code = ble_hids_boot_kb_inp_rep_send(p_hids,
                                                         INPUT_REPORT_KEYS_MAX_LEN,
                                                         data,
                                                         m_conn_handle);
            }
    
            if (err_code != NRF_SUCCESS)
            {
                break;
            }
    
            offset++;
        }
        while (offset <= data_len);
    
        *p_actual_len = offset;
    
        return err_code;
    }
    
    
    /**@brief   Function for initializing the buffer queue used to key events that could not be
     *          transmitted
     *
     * @warning This handler is an example only. You need to analyze how you wish to buffer or buffer at
     *          all.
     *
     * @note    In case of HID keyboard, a temporary buffering could be employed to handle scenarios
     *          where encryption is not yet enabled or there was a momentary link loss or there were no
     *          Transmit buffers.
     */
    static void buffer_init(void)
    {
        uint32_t buffer_count;
    
        BUFFER_LIST_INIT();
    
        for (buffer_count = 0; buffer_count < MAX_BUFFER_ENTRIES; buffer_count++)
        {
            BUFFER_ELEMENT_INIT(buffer_count);
        }
    }
    
    
    /**@brief Function for enqueuing key scan patterns that could not be transmitted either completely
     *        or partially.
     *
     * @warning This handler is an example only. You need to analyze how you wish to send the key
     *          release.
     *
     * @param[in]  p_hids         Identifies the service for which Key Notifications are buffered.
     * @param[in]  p_key_pattern  Pointer to key pattern.
     * @param[in]  pattern_len    Length of key pattern.
     * @param[in]  offset         Offset applied to Key Pattern when requesting a transmission on
     *                            dequeue, @ref buffer_dequeue.
     * @return     NRF_SUCCESS on success, else an error code indicating reason for failure.
     */
    static uint32_t buffer_enqueue(ble_hids_t * p_hids,
                                   uint8_t    * p_key_pattern,
                                   uint16_t     pattern_len,
                                   uint16_t     offset)
    {
        buffer_entry_t * element;
        uint32_t         err_code = NRF_SUCCESS;
    
        if (BUFFER_LIST_FULL())
        {
            // Element cannot be buffered.
            err_code = NRF_ERROR_NO_MEM;
        }
        else
        {
            // Make entry of buffer element and copy data.
            element              = &buffer_list.buffer[(buffer_list.wp)];
            element->p_instance  = p_hids;
            element->p_data      = p_key_pattern;
            element->data_offset = offset;
            element->data_len    = pattern_len;
    
            buffer_list.count++;
            buffer_list.wp++;
    
            if (buffer_list.wp == MAX_BUFFER_ENTRIES)
            {
                buffer_list.wp = 0;
            }
        }
    
        return err_code;
    }
    
    
    /**@brief   Function to dequeue key scan patterns that could not be transmitted either completely of
     *          partially.
     *
     * @warning This handler is an example only. You need to analyze how you wish to send the key
     *          release.
     *
     * @param[in]  tx_flag   Indicative of whether the dequeue should result in transmission or not.
     * @note       A typical example when all keys are dequeued with transmission is when link is
     *             disconnected.
     *
     * @return     NRF_SUCCESS on success, else an error code indicating reason for failure.
     */
    static uint32_t buffer_dequeue(bool tx_flag)
    {
        buffer_entry_t * p_element;
        uint32_t         err_code = NRF_SUCCESS;
        uint16_t         actual_len;
    
        if (BUFFER_LIST_EMPTY())
        {
            err_code = NRF_ERROR_NOT_FOUND;
        }
        else
        {
            bool remove_element = true;
    
            p_element = &buffer_list.buffer[(buffer_list.rp)];
    
            if (tx_flag)
            {
                err_code = send_key_scan_press_release(p_element->p_instance,
                                                       p_element->p_data,
                                                       p_element->data_len,
                                                       p_element->data_offset,
                                                       &actual_len);
                // An additional notification is needed for release of all keys, therefore check
                // is for actual_len <= element->data_len and not actual_len < element->data_len
                if ((err_code == NRF_ERROR_RESOURCES) && (actual_len <= p_element->data_len))
                {
                    // Transmission could not be completed, do not remove the entry, adjust next data to
                    // be transmitted
                    p_element->data_offset = actual_len;
                    remove_element         = false;
                }
            }
    
            if (remove_element)
            {
                BUFFER_ELEMENT_INIT(buffer_list.rp);
    
                buffer_list.rp++;
                buffer_list.count--;
    
                if (buffer_list.rp == MAX_BUFFER_ENTRIES)
                {
                    buffer_list.rp = 0;
                }
            }
        }
    
        return err_code;
    }
    
    
    /**@brief Function for sending sample key presses to the peer.
     *
     * @param[in]   key_pattern_len   Pattern length.
     * @param[in]   p_key_pattern     Pattern to be sent.
     */
    static void keys_send(uint8_t key_pattern_len, uint8_t * p_key_pattern)
    {
        ret_code_t err_code;
        uint16_t actual_len;
    
        err_code = send_key_scan_press_release(&m_hids,
                                               p_key_pattern,
                                               key_pattern_len,
                                               0,
                                               &actual_len);
        // An additional notification is needed for release of all keys, therefore check
        // is for actual_len <= key_pattern_len and not actual_len < key_pattern_len.
        if ((err_code == NRF_ERROR_RESOURCES) && (actual_len <= key_pattern_len))
        {
            // Buffer enqueue routine return value is not intentionally checked.
            // Rationale: Its better to have a a few keys missing than have a system
            // reset. Recommendation is to work out most optimal value for
            // MAX_BUFFER_ENTRIES to minimize chances of buffer queue full condition
            UNUSED_VARIABLE(buffer_enqueue(&m_hids, p_key_pattern, key_pattern_len, actual_len));
        }
    
    
        if ((err_code != NRF_SUCCESS) &&
            (err_code != NRF_ERROR_INVALID_STATE) &&
            (err_code != NRF_ERROR_RESOURCES) &&
            (err_code != NRF_ERROR_BUSY) &&
            (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
           )
        {
            APP_ERROR_HANDLER(err_code);
        }
    }
    
    
    /**@brief Function for handling the HID Report Characteristic Write event.
     *
     * @param[in]   p_evt   HID service event.
     */
    static void on_hid_rep_char_write(ble_hids_evt_t * p_evt)
    {
        if (p_evt->params.char_write.char_id.rep_type == BLE_HIDS_REP_TYPE_OUTPUT)
        {
            ret_code_t err_code;
            uint8_t  report_val;
            uint8_t  report_index = p_evt->params.char_write.char_id.rep_index;
    
            if (report_index == OUTPUT_REPORT_INDEX)
            {
                // This code assumes that the output report is one byte long. Hence the following
                // static assert is made.
                STATIC_ASSERT(OUTPUT_REPORT_MAX_LEN == 1);
    
                err_code = ble_hids_outp_rep_get(&m_hids,
                                                 report_index,
                                                 OUTPUT_REPORT_MAX_LEN,
                                                 0,
                                                 m_conn_handle,
                                                 &report_val);
                APP_ERROR_CHECK(err_code);
    
                if (!m_caps_on && ((report_val & OUTPUT_REPORT_BIT_MASK_CAPS_LOCK) != 0))
                {
                    // Caps Lock is turned On.
                    NRF_LOG_INFO("Caps Lock is turned On!");
                    err_code = bsp_indication_set(BSP_INDICATE_ALERT_3);
                    APP_ERROR_CHECK(err_code);
    
                    keys_send(sizeof(m_caps_on_key_scan_str), m_caps_on_key_scan_str);
                    m_caps_on = true;
                }
                else if (m_caps_on && ((report_val & OUTPUT_REPORT_BIT_MASK_CAPS_LOCK) == 0))
                {
                    // Caps Lock is turned Off .
                    NRF_LOG_INFO("Caps Lock is turned Off!");
                    err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF);
                    APP_ERROR_CHECK(err_code);
    
                    keys_send(sizeof(m_caps_off_key_scan_str), m_caps_off_key_scan_str);
                    m_caps_on = false;
                }
                else
                {
                    // The report received is not supported by this application. Do nothing.
                }
            }
        }
    }
    
    
    /**@brief Function for putting the chip into sleep mode.
     *
     * @note This function will not return.
     */
    static void sleep_mode_enter(void)
    {
        ret_code_t err_code;
    
        err_code = bsp_indication_set(BSP_INDICATE_IDLE);
        APP_ERROR_CHECK(err_code);
    
        // Prepare wakeup buttons.
        err_code = bsp_btn_ble_sleep_mode_prepare();
        APP_ERROR_CHECK(err_code);
    
        // Go to system-off mode (this function will not return; wakeup will cause a reset).
        err_code = sd_power_system_off();
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling HID events.
     *
     * @details This function will be called for all HID events which are passed to the application.
     *
     * @param[in]   p_hids  HID service structure.
     * @param[in]   p_evt   Event received from the HID service.
     */
    static void on_hids_evt(ble_hids_t * p_hids, ble_hids_evt_t * p_evt)
    {
        switch (p_evt->evt_type)
        {
            case BLE_HIDS_EVT_BOOT_MODE_ENTERED:
                m_in_boot_mode = true;
                break;
    
            case BLE_HIDS_EVT_REPORT_MODE_ENTERED:
                m_in_boot_mode = false;
                break;
    
            case BLE_HIDS_EVT_REP_CHAR_WRITE:
                on_hid_rep_char_write(p_evt);
                break;
    
            case BLE_HIDS_EVT_NOTIF_ENABLED:
                break;
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief Function for handling advertising events.
     *
     * @details This function will be called for advertising events which are passed to the application.
     *
     * @param[in] ble_adv_evt  Advertising event.
     */
    static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
    {
        ret_code_t err_code;
    
        switch (ble_adv_evt)
        {
            case BLE_ADV_EVT_DIRECTED_HIGH_DUTY:
                NRF_LOG_INFO("High Duty Directed advertising.");
                err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_DIRECTED);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_DIRECTED:
                NRF_LOG_INFO("Directed advertising.");
                err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_DIRECTED);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_FAST:
                NRF_LOG_INFO("Fast advertising.");
                err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_SLOW:
                NRF_LOG_INFO("Slow advertising.");
                err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_SLOW);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_FAST_WHITELIST:
                NRF_LOG_INFO("Fast advertising with whitelist.");
                err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_WHITELIST);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_SLOW_WHITELIST:
                NRF_LOG_INFO("Slow advertising with whitelist.");
                err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_WHITELIST);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_IDLE:
                sleep_mode_enter();
                break;
    
            case BLE_ADV_EVT_WHITELIST_REQUEST:
            {
                ble_gap_addr_t whitelist_addrs[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
                ble_gap_irk_t  whitelist_irks[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
                uint32_t       addr_cnt = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
                uint32_t       irk_cnt  = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
    
                err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt,
                                            whitelist_irks,  &irk_cnt);
                APP_ERROR_CHECK(err_code);
                NRF_LOG_DEBUG("pm_whitelist_get returns %d addr in whitelist and %d irk whitelist",
                              addr_cnt, irk_cnt);
    
                // Set the correct identities list (no excluding peers with no Central Address Resolution).
                identities_set(PM_PEER_ID_LIST_SKIP_NO_IRK);
    
                // Apply the whitelist.
                err_code = ble_advertising_whitelist_reply(&m_advertising,
                                                           whitelist_addrs,
                                                           addr_cnt,
                                                           whitelist_irks,
                                                           irk_cnt);
                APP_ERROR_CHECK(err_code);
            } break; //BLE_ADV_EVT_WHITELIST_REQUEST
    
            case BLE_ADV_EVT_PEER_ADDR_REQUEST:
            {
                pm_peer_data_bonding_t peer_bonding_data;
    
                // Only Give peer address if we have a handle to the bonded peer.
                if (m_peer_id != PM_PEER_ID_INVALID)
                {
                    err_code = pm_peer_data_bonding_load(m_peer_id, &peer_bonding_data);
                    if (err_code != NRF_ERROR_NOT_FOUND)
                    {
                        APP_ERROR_CHECK(err_code);
    
                        // Manipulate identities to exclude peers with no Central Address Resolution.
                        identities_set(PM_PEER_ID_LIST_SKIP_ALL);
    
                        ble_gap_addr_t * p_peer_addr = &(peer_bonding_data.peer_ble_id.id_addr_info);
                        err_code = ble_advertising_peer_addr_reply(&m_advertising, p_peer_addr);
                        APP_ERROR_CHECK(err_code);
                    }
                }
            } break; //BLE_ADV_EVT_PEER_ADDR_REQUEST
    
            default:
                break;
        }
    }
    
    
    /**@brief Function for handling BLE events.
     *
     * @param[in]   p_ble_evt   Bluetooth stack event.
     * @param[in]   p_context   Unused.
     */
    static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
    {
        ret_code_t err_code;
    
        switch (p_ble_evt->header.evt_id)
        {
            case BLE_GAP_EVT_CONNECTED:
                NRF_LOG_INFO("Connected");
                err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
                APP_ERROR_CHECK(err_code);
                m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
                err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_GAP_EVT_DISCONNECTED:
                NRF_LOG_INFO("Disconnected");
                // Dequeue all keys without transmission.
                (void) buffer_dequeue(false);
    
                m_conn_handle = BLE_CONN_HANDLE_INVALID;
    
                // Reset m_caps_on variable. Upon reconnect, the HID host will re-send the Output
                // report containing the Caps lock state.
                m_caps_on = false;
                // disabling alert 3. signal - used for capslock ON
                err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF);
                APP_ERROR_CHECK(err_code);
    
                break; // BLE_GAP_EVT_DISCONNECTED
    
            case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
            {
                NRF_LOG_DEBUG("PHY update request.");
                ble_gap_phys_t const phys =
                {
                    .rx_phys = BLE_GAP_PHY_AUTO,
                    .tx_phys = BLE_GAP_PHY_AUTO,
                };
                err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
                APP_ERROR_CHECK(err_code);
            } break;
    
            case BLE_GATTS_EVT_HVN_TX_COMPLETE:
                // Send next key event
                (void) buffer_dequeue(true);
                break;
    
            case BLE_GATTC_EVT_TIMEOUT:
                // Disconnect on GATT Client timeout event.
                NRF_LOG_DEBUG("GATT Client Timeout.");
                err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
                                                 BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_GATTS_EVT_TIMEOUT:
                // Disconnect on GATT Server timeout event.
                NRF_LOG_DEBUG("GATT Server Timeout.");
                err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
                                                 BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                APP_ERROR_CHECK(err_code);
                break;
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief Function for initializing the BLE stack.
     *
     * @details Initializes the SoftDevice and the BLE event interrupt.
     */
    static void ble_stack_init(void)
    {
        ret_code_t err_code;
    
        err_code = nrf_sdh_enable_request();
        APP_ERROR_CHECK(err_code);
    
        // Configure the BLE stack using the default settings.
        // Fetch the start address of the application RAM.
        uint32_t ram_start = 0;
        err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
        APP_ERROR_CHECK(err_code);
    
        // Enable BLE stack.
        err_code = nrf_sdh_ble_enable(&ram_start);
        APP_ERROR_CHECK(err_code);
    
        // Register a handler for BLE events.
        NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
    }
    
    
    /**@brief Function for the Event Scheduler initialization.
     */
    static void scheduler_init(void)
    {
        APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);
    }
    
    
    /**@brief Function for handling events from the BSP module.
     *
     * @param[in]   event   Event generated by button press.
     */
    static void bsp_event_handler(bsp_event_t event)
    {
        uint32_t         err_code;
        static uint8_t * p_key = m_sample_key_press_scan_str;
        static uint8_t   size  = 0;
    
        switch (event)
        {
            case BSP_EVENT_SLEEP:
                sleep_mode_enter();
                break;
    
            case BSP_EVENT_DISCONNECT:
                err_code = sd_ble_gap_disconnect(m_conn_handle,
                                                 BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                if (err_code != NRF_ERROR_INVALID_STATE)
                {
                    APP_ERROR_CHECK(err_code);
                }
                break;
    
            case BSP_EVENT_WHITELIST_OFF:
                if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
                {
                    err_code = ble_advertising_restart_without_whitelist(&m_advertising);
                    if (err_code != NRF_ERROR_INVALID_STATE)
                    {
                        APP_ERROR_CHECK(err_code);
                    }
                }
                break;
    
            case BSP_EVENT_KEY_0:
    //            if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
    //            {
    //                keys_send(1, p_key);
    //                p_key++;
    //                size++;
    //                if (size == MAX_KEYS_IN_ONE_REPORT)
    //                {
    //                    p_key = m_sample_key_press_scan_str;
    //                    size  = 0;
    //                }
    //            }
                break;
    
            default:
                break;
        }
    }
    
    
    /**@brief Function for the Peer Manager initialization.
     */
    static void peer_manager_init(void)
    {
        ble_gap_sec_params_t sec_param;
        ret_code_t           err_code;
    
        err_code = pm_init();
        APP_ERROR_CHECK(err_code);
    
        memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));
    
        // Security parameters to be used for all security procedures.
        sec_param.bond           = SEC_PARAM_BOND;
        sec_param.mitm           = SEC_PARAM_MITM;
        sec_param.lesc           = SEC_PARAM_LESC;
        sec_param.keypress       = SEC_PARAM_KEYPRESS;
        sec_param.io_caps        = SEC_PARAM_IO_CAPABILITIES;
        sec_param.oob            = SEC_PARAM_OOB;
        sec_param.min_key_size   = SEC_PARAM_MIN_KEY_SIZE;
        sec_param.max_key_size   = SEC_PARAM_MAX_KEY_SIZE;
        sec_param.kdist_own.enc  = 1;
        sec_param.kdist_own.id   = 1;
        sec_param.kdist_peer.enc = 1;
        sec_param.kdist_peer.id  = 1;
    
        err_code = pm_sec_params_set(&sec_param);
        APP_ERROR_CHECK(err_code);
    
        err_code = pm_register(pm_evt_handler);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the Advertising functionality.
     */
    static void advertising_init(void)
    {
        uint32_t               err_code;
        uint8_t                adv_flags;
        ble_advertising_init_t init;
    
        memset(&init, 0, sizeof(init));
    
        adv_flags                            = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
        init.advdata.name_type               = BLE_ADVDATA_FULL_NAME;
        init.advdata.include_appearance      = true;
        init.advdata.flags                   = adv_flags;
        init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
        init.advdata.uuids_complete.p_uuids  = m_adv_uuids;
    
        init.config.ble_adv_whitelist_enabled          = true;
        init.config.ble_adv_directed_high_duty_enabled = true;
        init.config.ble_adv_directed_enabled           = false;
        init.config.ble_adv_directed_interval          = 0;
        init.config.ble_adv_directed_timeout           = 0;
        init.config.ble_adv_fast_enabled               = true;
        init.config.ble_adv_fast_interval              = APP_ADV_FAST_INTERVAL;
        init.config.ble_adv_fast_timeout               = APP_ADV_FAST_DURATION;
        init.config.ble_adv_slow_enabled               = true;
        init.config.ble_adv_slow_interval              = APP_ADV_SLOW_INTERVAL;
        init.config.ble_adv_slow_timeout               = APP_ADV_SLOW_DURATION;
    
        init.evt_handler   = on_adv_evt;
        init.error_handler = ble_advertising_error_handler;
    
        err_code = ble_advertising_init(&m_advertising, &init);
        APP_ERROR_CHECK(err_code);
    
        ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
    }
    
    
    /**@brief Function for initializing buttons and leds.
     *
     * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
     */
    static void buttons_leds_init(bool * p_erase_bonds)
    {
        ret_code_t err_code;
        bsp_event_t startup_event;
    
        err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
        APP_ERROR_CHECK(err_code);
    
        err_code = bsp_btn_ble_init(NULL, &startup_event);
        APP_ERROR_CHECK(err_code);
    
        *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
    }
    
    
    /**@brief Function for initializing the nrf log module.
     */
    static void log_init(void)
    {
        ret_code_t err_code = NRF_LOG_INIT(NULL);
        APP_ERROR_CHECK(err_code);
    
        NRF_LOG_DEFAULT_BACKENDS_INIT();
    }
    
    
    /**@brief Function for initializing power management.
     */
    static void power_management_init(void)
    {
        ret_code_t err_code;
        err_code = nrf_pwr_mgmt_init();
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling the idle state (main loop).
     *
     * @details If there is no pending log operation, then sleep until next the next event occurs.
     */
    static void idle_state_handle(void)
    {
        app_sched_execute();
        if (NRF_LOG_PROCESS() == false)
        {
            nrf_pwr_mgmt_run();
        }
    }
    
    
    /**@brief Function for application main entry.
     */
    int main(void)
    {
        bool erase_bonds = true;
    
        // Initialize.
        log_init();
        timers_init();
    //    buttons_leds_init(&erase_bonds);
        power_management_init();
        ble_stack_init();
        scheduler_init();
        gap_params_init();
        gatt_init();
        advertising_init();
        services_init();
        sensor_simulator_init();
        conn_params_init();
        buffer_init();
        peer_manager_init();
    
        // Start execution.
        NRF_LOG_INFO("HID Keyboard example started.");
        timers_start();
        advertising_start(erase_bonds);
    
        // Enter main loop.
        for (;;)
        {
            idle_state_handle();
    	
        }
    }
    
    
    /**
     * @}
     */
    

  • Hi Taylor, I just went through your code line by line and nothing is obviously wrong to me... I guess my next step would be just trying what you are trying to do, merging HID Keyboard and HID Mouse example. Just to be sure. If that somehow work, would it be helpful to you?

    I also do realize you are putting DFU example and some (removed) custom behavior in the mix. However I don't think it would affected the HID behavior at all so I will not involve it yet. I guess maybe I can put your peer manager conditional in.

  • Hi , forget what I said about me writing code. The problem is just a minor one. You didn't change the HID output report ID for the Caps Lock LED. Just change OUTPUT_REP_REF_ID to 4.

    If this fix your problem, please help verify this reply as an answer.

  • Hi, Hieu

    I have changed OUTPUT_REP_REF_ID to 4, but still have no print "CAPS ON" or "CAPS OFF" when I pushed CapsLk button.

    Did I delete some important code?

    /**
     * Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
     *
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without modification,
     * are permitted provided that the following conditions are met:
     *
     * 1. Redistributions of source code must retain the above copyright notice, this
     *    list of conditions and the following disclaimer.
     *
     * 2. Redistributions in binary form, except as embedded into a Nordic
     *    Semiconductor ASA integrated circuit in a product or a software update for
     *    such product, must reproduce the above copyright notice, this list of
     *    conditions and the following disclaimer in the documentation and/or other
     *    materials provided with the distribution.
     *
     * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
     *    contributors may be used to endorse or promote products derived from this
     *    software without specific prior written permission.
     *
     * 4. This software, with or without modification, must only be used with a
     *    Nordic Semiconductor ASA integrated circuit.
     *
     * 5. Any software provided in binary form under this license must not be reverse
     *    engineered, decompiled, modified and/or disassembled.
     *
     * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
     * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
     * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
     * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
     * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     */
    /** @file
     *
     * @defgroup ble_sdk_app_hids_mouse_main main.c
     * @{
     * @ingroup ble_sdk_app_hids_mouse
     * @brief HID Mouse Sample Application main file.
     *
     * This file contains is the source code for a sample application using the HID, Battery and Device
     * Information Service for implementing a simple mouse functionality. This application uses the
     * @ref app_scheduler.
     *
     * Also it would accept pairing requests from any peer device. This implementation of the
     * application will not know whether a connected central is a known device or not.
     */
    
    #include <stdint.h>
    #include <string.h>
    #include "nordic_common.h"
    #include "nrf.h"
    #include "nrf_sdm.h"
    #include "app_error.h"
    #include "ble.h"
    #include "ble_err.h"
    #include "ble_hci.h"
    #include "ble_srv_common.h"
    #include "ble_advdata.h"
    #include "ble_hids.h"
    #include "ble_bas.h"
    #include "ble_dis.h"
    #include "ble_conn_params.h"
    #include "sensorsim.h"
    //#include "bsp_btn_ble.h"
    #include "app_scheduler.h"
    #include "nrf_sdh.h"
    #include "nrf_sdh_soc.h"
    #include "nrf_sdh_ble.h"
    #include "app_timer.h"
    #include "peer_manager.h"
    #include "ble_advertising.h"
    #include "fds.h"
    #include "ble_conn_state.h"
    #include "nrf_ble_gatt.h"
    #include "nrf_ble_qwr.h"
    #include "nrf_pwr_mgmt.h"
    #include "peer_manager_handler.h"
    
    #include "usr_io_def.h"
    #include "usr_twi.h"
    #include "m_hid_app.h"
    #include "nrf_drv_saadc.h"
    #include "usr_led.h"
    #include "ble_dfu.h"
    
    #include "nrf_log.h"
    #include "nrf_log_ctrl.h"
    #include "nrf_log_default_backends.h"
    
    #define DEVICE_NAME                     "nRF5_Mouse"                                /**< Name of device. Will be included in the advertising data. */
    #define MANUFACTURER_NAME               "NordicSemiconductor"                       /**< Manufacturer. Will be passed to Device Information Service. */
    
    #define APP_BLE_OBSERVER_PRIO           3                                           /**< Application's BLE observer priority. You shouldn't need to modify this value. */
    #define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */
    
    #define BATTERY_LEVEL_MEAS_INTERVAL     APP_TIMER_TICKS(2000)                      /**< Battery level measurement interval (ticks). */
    #define MIN_BATTERY_LEVEL               81                                          /**< Minimum simulated battery level. */
    #define MAX_BATTERY_LEVEL               100                                         /**< Maximum simulated battery level. */
    #define BATTERY_LEVEL_INCREMENT         1                                           /**< Increment between each simulated battery level measurement. */
    
    #define PNP_ID_VENDOR_ID_SOURCE         0x02                                        /**< Vendor ID Source. */
    #define PNP_ID_VENDOR_ID                0x1915                                      /**< Vendor ID. */
    #define PNP_ID_PRODUCT_ID               0xEEEE                                      /**< Product ID. */
    #define PNP_ID_PRODUCT_VERSION          0x0001                                      /**< Product Version. */
    
    /*lint -emacro(524, MIN_CONN_INTERVAL) // Loss of precision */
    #define MIN_CONN_INTERVAL               MSEC_TO_UNITS(7.5, UNIT_1_25_MS)            /**< Minimum connection interval (7.5 ms). */
    #define MAX_CONN_INTERVAL               MSEC_TO_UNITS(15, UNIT_1_25_MS)             /**< Maximum connection interval (15 ms). */
    #define SLAVE_LATENCY                   20                                          /**< Slave latency. */
    #define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(3000, UNIT_10_MS)             /**< Connection supervisory timeout (3000 ms). */
    
    #define FIRST_CONN_PARAMS_UPDATE_DELAY  APP_TIMER_TICKS(5000)                       /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
    #define NEXT_CONN_PARAMS_UPDATE_DELAY   APP_TIMER_TICKS(30000)                      /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
    #define MAX_CONN_PARAM_UPDATE_COUNT     3                                           /**< Number of attempts before giving up the connection parameter negotiation. */
    
    #define SEC_PARAM_BOND                  1                                           /**< Perform bonding. */
    #define SEC_PARAM_MITM                  0                                           /**< Man In The Middle protection not required. */
    #define SEC_PARAM_LESC                  0                                           /**< LE Secure Connections not enabled. */
    #define SEC_PARAM_KEYPRESS              0                                           /**< Keypress notifications not enabled. */
    #define SEC_PARAM_IO_CAPABILITIES       BLE_GAP_IO_CAPS_NONE                        /**< No I/O capabilities. */
    #define SEC_PARAM_OOB                   0                                           /**< Out Of Band data not available. */
    #define SEC_PARAM_MIN_KEY_SIZE          7                                           /**< Minimum encryption key size. */
    #define SEC_PARAM_MAX_KEY_SIZE          16                                          /**< Maximum encryption key size. */
    
    #define SWIFT_PAIR_SUPPORTED            1                                           /**< Swift Pair feature is supported. */
    #if SWIFT_PAIR_SUPPORTED == 1
    #define MICROSOFT_VENDOR_ID             0x0006                                      /**< Microsoft Vendor ID.*/
    #define MICROSOFT_BEACON_ID             0x03                                        /**< Microsoft Beacon ID, used to indicate that Swift Pair feature is supported. */
    #define MICROSOFT_BEACON_SUB_SCENARIO   0x00                                        /**< Microsoft Beacon Sub Scenario, used to indicate how the peripheral will pair using Swift Pair feature. */
    #define RESERVED_RSSI_BYTE              0x80                                        /**< Reserved RSSI byte, used to maintain forwards and backwards compatibility. */
    #endif
    
    //ADC define
    #define ADC_REF_VOLTAGE_IN_MILLIVOLTS   600                               /**< Reference voltage (in milli volts) used by ADC while doing conversion. */
    #define ADC_PRE_SCALING_COMPENSATION    6                                 /**< The ADC is configured to use VDD with 1/3 prescaling as input. And hence the result of conversion is to be multiplied by 3 to get the actual value of the battery voltage.*/
    #define DIODE_FWD_VOLT_DROP_MILLIVOLTS  0                               /**< Typical forward voltage drop of the diode . */
    #define ADC_RES_10BIT                   1024                              /**< Maximum digital value for 10-bit ADC conversion. */
    #define ADC_RESULT_IN_MILLI_VOLTS(ADC_VALUE)\
            ((((ADC_VALUE) * ADC_REF_VOLTAGE_IN_MILLIVOLTS) / ADC_RES_10BIT) * ADC_PRE_SCALING_COMPENSATION)
    
    //HID MAP define
    #define MOVEMENT_SPEED                  5                                           /**< Number of pixels by which the cursor is moved each time a button is pushed. */
    #define INPUT_REPORT_COUNT              4                                           /**< Number of input reports in this application. */
    #define INPUT_REP_BUTTONS_LEN           3                                           /**< Length of Mouse Input Report containing button data. */
    #define INPUT_REP_MOVEMENT_LEN          3                                           /**< Length of Mouse Input Report containing movement data. */
    #define INPUT_REP_MEDIA_PLAYER_LEN      1                                           /**< Length of Mouse Input Report containing media player data. */
    #define INPUT_REP_BUTTONS_INDEX         0                                           /**< Index of Mouse Input Report containing button data. */
    #define INPUT_REP_MOVEMENT_INDEX        1                                           /**< Index of Mouse Input Report containing movement data. */
    #define INPUT_REP_MPLAYER_INDEX         2                                           /**< Index of Mouse Input Report containing media player data. */
    #define INPUT_REP_REF_BUTTONS_ID        1                                           /**< Id of reference to Mouse Input Report containing button data. */
    #define INPUT_REP_REF_MOVEMENT_ID       2                                           /**< Id of reference to Mouse Input Report containing movement data. */
    #define INPUT_REP_REF_MPLAYER_ID        3                                           /**< Id of reference to Mouse Input Report containing media player data. */
    
    #define OUTPUT_REPORT_INDEX                 0                                          /**< Index of Output Report. */
    #define OUTPUT_REPORT_MAX_LEN               1                                          /**< Maximum length of Output Report. */
    #define INPUT_REPORT_KEYS_INDEX             3                                          /**< Index of Input Report. */
    #define OUTPUT_REPORT_BIT_MASK_CAPS_LOCK    0x02                                       /**< CAPS LOCK bit in Output Report (based on 'LED Page (0x08)' of the Universal Serial Bus HID Usage Tables). */
    #define INPUT_REP_REF_ID                    4                                          /**< Id of reference to Keyboard Input Report. */
    #define OUTPUT_REP_REF_ID                   4                                          /**< Id of reference to Keyboard Output Report. */
    #define FEATURE_REP_REF_ID                  0                                          /**< ID of reference to Keyboard Feature Report. */
    #define FEATURE_REPORT_MAX_LEN              2                                          /**< Maximum length of Feature Report. */
    #define FEATURE_REPORT_INDEX                0
    
    #define MAX_BUFFER_ENTRIES                  5  
    
    #define INPUT_REPORT_KEYS_MAX_LEN           8
    
    
    #define BASE_USB_HID_SPEC_VERSION       0x0101                                      /**< Version number of base USB HID Specification implemented by this application. */
    
    #define SCHED_MAX_EVENT_DATA_SIZE       APP_TIMER_SCHED_EVENT_DATA_SIZE             /**< Maximum size of scheduler events. */
    #ifdef SVCALL_AS_NORMAL_FUNCTION
    #define SCHED_QUEUE_SIZE                20                                          /**< Maximum number of events in the scheduler queue. More is needed in case of Serialization. */
    #else
    #define SCHED_QUEUE_SIZE                10                                          /**< Maximum number of events in the scheduler queue. */
    #endif
    
    #define DEAD_BEEF                       0xDEADBEEF                                  /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
    
    #define APP_ADV_FAST_INTERVAL           0x0028                                      /**< Fast advertising interval (in units of 0.625 ms. This value corresponds to 25 ms.). */
    #define APP_ADV_SLOW_INTERVAL           0x00A0                                      /**< Slow advertising interval (in units of 0.625 ms. This value corresponds to 100 ms.). */
    
    #define APP_ADV_FAST_DURATION           1000    //3000                                    /**< The advertising duration of fast advertising in units of 10 milliseconds. */
    #define APP_ADV_SLOW_DURATION           12000   //18000                                    /**< The advertising duration of slow advertising in units of 10 milliseconds. */
    
    
    APP_TIMER_DEF(m_battery_timer_id);                                                  /**< Battery timer. */
    BLE_BAS_DEF(m_bas);                                                                 /**< Battery service instance. */
    BLE_HIDS_DEF(m_hids,                                                                /**< HID service instance. */
                 NRF_SDH_BLE_TOTAL_LINK_COUNT,
                 INPUT_REP_BUTTONS_LEN,
                 INPUT_REP_MOVEMENT_LEN,
                 INPUT_REP_MEDIA_PLAYER_LEN);
    NRF_BLE_GATT_DEF(m_gatt);                                                           /**< GATT module instance. */
    NRF_BLE_QWR_DEF(m_qwr);                                                             /**< Context for the Queued Write module.*/
    BLE_ADVERTISING_DEF(m_advertising);                                                 /**< Advertising module instance. */
    
    static nrf_saadc_value_t m_adc_buf;
    
    static bool              m_in_boot_mode = false;                                    /**< Current protocol mode. */
    static uint16_t          m_conn_handle  = BLE_CONN_HANDLE_INVALID;                  /**< Handle of the current connection. */
    static pm_peer_id_t      m_peer_id;                                                 /**< Device reference handle to the current bonded central. */
    static ble_uuid_t        m_adv_uuids[] =                                            /**< Universally unique service identifiers. */
    {
        {BLE_UUID_HUMAN_INTERFACE_DEVICE_SERVICE, BLE_UUID_TYPE_BLE}
    };
    
    /** @} */
    
    /** Abstracts buffer element */
    typedef struct hid_key_buffer
    {
        uint8_t      data_offset; /**< Max Data that can be buffered for all entries */
        uint8_t      data_len;    /**< Total length of data */
        uint8_t    * p_data;      /**< Scanned key pattern */
        ble_hids_t * p_instance;  /**< Identifies peer and service instance */
    } buffer_entry_t;
    
    STATIC_ASSERT(sizeof(buffer_entry_t) % 4 == 0);
    
    /** Circular buffer list */
    typedef struct
    {
        buffer_entry_t buffer[MAX_BUFFER_ENTRIES]; /**< Maximum number of entries that can enqueued in the list */
        uint8_t        rp;                         /**< Index to the read location */
        uint8_t        wp;                         /**< Index to write location */
        uint8_t        count;                      /**< Number of elements in the list */
    } buffer_list_t;
    
    STATIC_ASSERT(sizeof(buffer_list_t) % 4 == 0);
    
    static buffer_list_t     buffer_list;                               /**< List to enqueue not just data to be sent, but also related information like the handle, connection handle etc */
    //Key
    static bool              m_caps_on = false;                         /**< Variable to indicate if Caps Lock is turned on. */
    static uint8_t m_sample_key_press_scan_str[] = /**< Key pattern to be sent when the key press button has been pushed. */
    {
        0x5d,       /* Key h */
        0x08,       /* Key e */
        0x0f,       /* Key l */
        0x0f,       /* Key l */
        0x12,       /* Key o */
        0x51        /* Key Return */
    };
    
    static uint8_t m_caps_on_key_scan_str[] = /**< Key pattern to be sent when the output report has been written with the CAPS LOCK bit set. */
    {
        0x06,       /* Key C */
        0x04,       /* Key a */
        0x13,       /* Key p */
        0x16,       /* Key s */
        0x12,       /* Key o */
        0x11,       /* Key n */
    };
    
    static uint8_t m_caps_off_key_scan_str[] = /**< Key pattern to be sent when the output report has been written with the CAPS LOCK bit cleared. */
    {
        0x06,       /* Key C */
        0x04,       /* Key a */
        0x13,       /* Key p */
        0x16,       /* Key s */
        0x12,       /* Key o */
        0x09,       /* Key f */
    };
    /** @} */
    
    #if SWIFT_PAIR_SUPPORTED == 1
    static uint8_t m_sp_payload[] =                                                     /**< Payload of advertising data structure for Microsoft Swift Pair feature. */
    {
        MICROSOFT_BEACON_ID,
        MICROSOFT_BEACON_SUB_SCENARIO,
        RESERVED_RSSI_BYTE
    };
    static ble_advdata_manuf_data_t m_sp_manuf_advdata =                                /**< Advertising data structure for Microsoft Swift Pair feature. */
    {
        .company_identifier = MICROSOFT_VENDOR_ID,
        .data               =
        {
            .size   = sizeof(m_sp_payload),
            .p_data = &m_sp_payload[0]
        }
    };
    static ble_advdata_t m_sp_advdata;
    #endif
    
    static void on_hids_evt(ble_hids_t * p_hids, ble_hids_evt_t * p_evt);
    
    /**@brief Callback function for asserts in the SoftDevice.
     *
     * @details This function will be called in case of an assert in the SoftDevice.
     *
     * @warning This handler is an example only and does not fit a final product. You need to analyze
     *          how your product is supposed to react in case of Assert.
     * @warning On assert from the SoftDevice, the system can only recover on reset.
     *
     * @param[in]   line_num   Line number of the failing ASSERT call.
     * @param[in]   file_name  File name of the failing ASSERT call.
     */
    void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
    {
        app_error_handler(DEAD_BEEF, line_num, p_file_name);
    }
    
    
    /**@brief Function for setting filtered whitelist.
     *
     * @param[in] skip  Filter passed to @ref pm_peer_id_list.
     */
    static void whitelist_set(pm_peer_id_list_skip_t skip)
    {
        pm_peer_id_t peer_ids[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
        uint32_t     peer_id_count = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
    
        ret_code_t err_code = pm_peer_id_list(peer_ids, &peer_id_count, PM_PEER_ID_INVALID, skip);
        APP_ERROR_CHECK(err_code);
    
        NRF_LOG_INFO("\tm_whitelist_peer_cnt %d, MAX_PEERS_WLIST %d",
                       peer_id_count + 1,
                       BLE_GAP_WHITELIST_ADDR_MAX_COUNT);
    
        err_code = pm_whitelist_set(peer_ids, peer_id_count);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for setting filtered device identities.
     *
     * @param[in] skip  Filter passed to @ref pm_peer_id_list.
     */
    static void identities_set(pm_peer_id_list_skip_t skip)
    {
        pm_peer_id_t peer_ids[BLE_GAP_DEVICE_IDENTITIES_MAX_COUNT];
        uint32_t     peer_id_count = BLE_GAP_DEVICE_IDENTITIES_MAX_COUNT;
    
        ret_code_t err_code = pm_peer_id_list(peer_ids, &peer_id_count, PM_PEER_ID_INVALID, skip);
        APP_ERROR_CHECK(err_code);
    
        err_code = pm_device_identities_list_set(peer_ids, peer_id_count);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Clear bond information from persistent storage.
     */
    static void delete_bonds(void)
    {
        ret_code_t err_code;
    
        NRF_LOG_INFO("Erase bonds!");
    
        err_code = pm_peers_delete();
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for starting advertising.
     */
    static void advertising_start(bool erase_bonds)
    {
        if (erase_bonds == true)
        {
            delete_bonds();
            // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
        }
        else
        {
            whitelist_set(PM_PEER_ID_LIST_SKIP_NO_ID_ADDR);
    
            ret_code_t ret = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
            APP_ERROR_CHECK(ret);
        }
    }
    
    
    /**@brief Function for handling Peer Manager events.
     *
     * @param[in] p_evt  Peer Manager event.
     */
    static void pm_evt_handler(pm_evt_t const * p_evt)
    {
        pm_handler_on_pm_evt(p_evt);
        pm_handler_flash_clean(p_evt);
    
        switch (p_evt->evt_id)
        {
            case PM_EVT_CONN_SEC_SUCCEEDED:
                m_peer_id = p_evt->peer_id;
    						m_hid_data.peer_manage = true;
                break;
    
            case PM_EVT_PEERS_DELETE_SUCCEEDED:
                advertising_start(false);
                break;
    
            case PM_EVT_PEER_DATA_UPDATE_SUCCEEDED:
                if (     p_evt->params.peer_data_update_succeeded.flash_changed
                     && (p_evt->params.peer_data_update_succeeded.data_id == PM_PEER_DATA_ID_BONDING))
                {
                    NRF_LOG_INFO("New Bond, add the peer to the whitelist if possible");
                    // Note: You should check on what kind of white list policy your application should use.
    
                    whitelist_set(PM_PEER_ID_LIST_SKIP_NO_ID_ADDR);
                }
                break;
    				case PM_EVT_CONN_SEC_CONFIG_REQ:
    					  {
    								pm_conn_sec_config_t config = {.allow_repairing = true};
    								pm_conn_sec_config_reply(p_evt->conn_handle, &config);
    					  }
    						break;
            default:
                break;
        }
    }
    
    
    /**@brief Function for handling Service errors.
     *
     * @details A pointer to this function will be passed to each service which may need to inform the
     *          application about an error.
     *
     * @param[in]   nrf_error   Error code containing information about what went wrong.
     */
    static void service_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for handling advertising errors.
     *
     * @param[in] nrf_error  Error code containing information about what went wrong.
     */
    static void ble_advertising_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    /**@brief Function for handling the ADC interrupt.
     *
     * @details  This function will fetch the conversion result from the ADC, convert the value into
     *           percentage and send it to peer.
     */
    void saadc_event_handler(nrf_drv_saadc_evt_t const * p_event)
    {
        if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
        {
            nrf_saadc_value_t adc_result;
            uint16_t batt_lvl_in_milli_volts;
    
            adc_result = p_event->data.done.p_buffer[0];
    				
            batt_lvl_in_milli_volts =
                (ADC_RESULT_IN_MILLI_VOLTS(adc_result) + DIODE_FWD_VOLT_DROP_MILLIVOLTS)*2;
    				if(batt_lvl_in_milli_volts>=4100) m_hid_data.battery_level=100;
    				else if((batt_lvl_in_milli_volts>=3900)&((batt_lvl_in_milli_volts<4100))) m_hid_data.battery_level=75;
    				else if((batt_lvl_in_milli_volts>=3700)&((batt_lvl_in_milli_volts<3900))) m_hid_data.battery_level=50;
    				else if((batt_lvl_in_milli_volts>=3550)&((batt_lvl_in_milli_volts<3700))) m_hid_data.battery_level=25;
    				else if(batt_lvl_in_milli_volts<3550) m_hid_data.battery_level=0;
    				
    				if(batt_lvl_in_milli_volts<=3450)
    				{
    						if(m_hid_data.ble_status != DEVICE_LOW_POWER_WAIT)
    						{
    								m_hid_data.ble_status = DEVICE_LOW_POWER;
    						}
    				}else if(batt_lvl_in_milli_volts>=3600)
    				{
    						if(m_hid_data.ble_status == DEVICE_LOW_POWER_WAIT)
    						{
    								m_hid_data.ble_status = DEVICE_LOW_POWER_EXIT;
    						}
    				}
            NRF_LOG_INFO("HID DEVICE Battery Level : %d [mV]  %d%%", batt_lvl_in_milli_volts,m_hid_data.battery_level);
        }
        else if (p_event->type == NRF_DRV_SAADC_EVT_CALIBRATEDONE)
        {
            NRF_LOG_INFO("HID SAADC calibration complete");
        }
    }
    /**@brief Function for performing a battery measurement, and update the Battery Level characteristic in the Battery Service.
     */
    static void battery_level_update(void)
    {
        ret_code_t err_code;
    	
    		static uint8_t * p_key = m_sample_key_press_scan_str;
        static uint8_t   size  = 0;
    
        err_code = nrf_drv_saadc_buffer_convert(&m_adc_buf, 1);
        APP_ERROR_CHECK(err_code);
        
        err_code = nrf_drv_saadc_sample();
        APP_ERROR_CHECK(err_code);	
    	
        err_code = ble_bas_battery_level_update(&m_bas, m_hid_data.battery_level, BLE_CONN_HANDLE_ALL);
        if ((err_code != NRF_SUCCESS) &&
            (err_code != NRF_ERROR_BUSY) &&
            (err_code != NRF_ERROR_RESOURCES) &&
            (err_code != NRF_ERROR_FORBIDDEN) &&
            (err_code != NRF_ERROR_INVALID_STATE) &&
            (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
           )
        {
            APP_ERROR_HANDLER(err_code);
        }
    }
    
    /**@brief Function for handling the Battery measurement timer timeout.
     *
     * @details This function will be called each time the battery level measurement timer expires.
     *
     * @param[in]   p_context   Pointer used for passing some arbitrary information (context) from the
     *                          app_start_timer() call to the timeout handler.
     */
    static void battery_level_meas_timeout_handler(void * p_context)
    {
        UNUSED_PARAMETER(p_context);
        battery_level_update();
    }
    
    
    /**@brief Function for the Timer initialization.
     *
     * @details Initializes the timer module.
     */
    static void timers_init(void)
    {
        ret_code_t err_code;
    
        err_code = app_timer_init();
        APP_ERROR_CHECK(err_code);
    
        err_code = nrf_drv_saadc_init(NULL, saadc_event_handler);
        APP_ERROR_CHECK(err_code);
    
        nrf_saadc_channel_config_t config =
            NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN2);
    
        config.burst = NRF_SAADC_BURST_ENABLED;
    
        err_code = nrf_drv_saadc_channel_init(0, &config);
        APP_ERROR_CHECK(err_code);
    
        err_code = nrf_drv_saadc_calibrate_offset();
        APP_ERROR_CHECK(err_code);	
    	
        // Create battery timer.
        err_code = app_timer_create(&m_battery_timer_id,
                                    APP_TIMER_MODE_REPEATED,
                                    battery_level_meas_timeout_handler);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for the GAP initialization.
     *
     * @details This function sets up all the necessary GAP (Generic Access Profile) parameters of the
     *          device including the device name, appearance, and the preferred connection parameters.
     */
    static void gap_params_init(void)
    {
        ret_code_t              err_code;
        ble_gap_conn_params_t   gap_conn_params;
        ble_gap_conn_sec_mode_t sec_mode;
    
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
    
        err_code = sd_ble_gap_device_name_set(&sec_mode,
                                              (const uint8_t *)DEVICE_NAME,
                                              strlen(DEVICE_NAME));
        APP_ERROR_CHECK(err_code);
    
        err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_HID_MOUSE);
        APP_ERROR_CHECK(err_code);
    
        memset(&gap_conn_params, 0, sizeof(gap_conn_params));
    
        gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
        gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
        gap_conn_params.slave_latency     = SLAVE_LATENCY;
        gap_conn_params.conn_sup_timeout  = CONN_SUP_TIMEOUT;
    
        err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the GATT module.
     */
    static void gatt_init(void)
    {
        ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling Queued Write Module errors.
     *
     * @details A pointer to this function will be passed to each service which may need to inform the
     *          application about an error.
     *
     * @param[in]   nrf_error   Error code containing information about what went wrong.
     */
    static void nrf_qwr_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for initializing the Queued Write Module.
     */
    static void qwr_init(void)
    {
        ret_code_t         err_code;
        nrf_ble_qwr_init_t qwr_init_obj = {0};
    
        qwr_init_obj.error_handler = nrf_qwr_error_handler;
    
        err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing Device Information Service.
     */
    static void dis_init(void)
    {
        ret_code_t       err_code;
        ble_dis_init_t   dis_init_obj;
        ble_dis_pnp_id_t pnp_id;
    
        pnp_id.vendor_id_source = PNP_ID_VENDOR_ID_SOURCE;
        pnp_id.vendor_id        = PNP_ID_VENDOR_ID;
        pnp_id.product_id       = PNP_ID_PRODUCT_ID;
        pnp_id.product_version  = PNP_ID_PRODUCT_VERSION;
    
        memset(&dis_init_obj, 0, sizeof(dis_init_obj));
    
        ble_srv_ascii_to_utf8(&dis_init_obj.manufact_name_str, MANUFACTURER_NAME);
        dis_init_obj.p_pnp_id = &pnp_id;
    
        dis_init_obj.dis_char_rd_sec = SEC_JUST_WORKS;
    
        err_code = ble_dis_init(&dis_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing Battery Service.
     */
    static void bas_init(void)
    {
        ret_code_t     err_code;
        ble_bas_init_t bas_init_obj;
    
        memset(&bas_init_obj, 0, sizeof(bas_init_obj));
    
        bas_init_obj.evt_handler          = NULL;
        bas_init_obj.support_notification = true;
        bas_init_obj.p_report_ref         = NULL;
        bas_init_obj.initial_batt_level   = 100;
    
        bas_init_obj.bl_rd_sec        = SEC_JUST_WORKS;
        bas_init_obj.bl_cccd_wr_sec   = SEC_JUST_WORKS;
        bas_init_obj.bl_report_rd_sec = SEC_JUST_WORKS;
    
        err_code = ble_bas_init(&m_bas, &bas_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    /**@brief Function for initializing DFU Service.
     */
    static void advertising_config_get(ble_adv_modes_config_t * p_config)
    {
        memset(p_config, 0, sizeof(ble_adv_modes_config_t));
    
        p_config->ble_adv_fast_enabled  = true;
        p_config->ble_adv_fast_interval = APP_ADV_FAST_INTERVAL;
        p_config->ble_adv_fast_timeout  = APP_ADV_FAST_DURATION;
    }
    static void disconnect(uint16_t conn_handle, void * p_context)
    {
        UNUSED_PARAMETER(p_context);
    
        ret_code_t err_code = sd_ble_gap_disconnect(conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
        if (err_code != NRF_SUCCESS)
        {
            NRF_LOG_WARNING("Failed to disconnect connection. Connection handle: %d Error: %d", conn_handle, err_code);
        }
        else
        {
            NRF_LOG_DEBUG("Disconnected connection handle %d", conn_handle);
        }
    }
    /**@brief Function for handling dfu events from the Buttonless Secure DFU service
     *
     * @param[in]   event   Event from the Buttonless Secure DFU service.
     */
    static void ble_dfu_evt_handler(ble_dfu_buttonless_evt_type_t event)
    {
        switch (event)
        {
            case BLE_DFU_EVT_BOOTLOADER_ENTER_PREPARE:
            {
                NRF_LOG_INFO("Device is preparing to enter bootloader mode.");
    
                // Prevent device from advertising on disconnect.
                ble_adv_modes_config_t config;
                advertising_config_get(&config);
                config.ble_adv_on_disconnect_disabled = true;
                ble_advertising_modes_config_set(&m_advertising, &config);
    
                // Disconnect all other bonded devices that currently are connected.
                // This is required to receive a service changed indication
                // on bootup after a successful (or aborted) Device Firmware Update.
                uint32_t conn_count = ble_conn_state_for_each_connected(disconnect, NULL);
                NRF_LOG_INFO("Disconnected %d links.", conn_count);
                break;
            }
    
            case BLE_DFU_EVT_BOOTLOADER_ENTER:
                // YOUR_JOB: Write app-specific unwritten data to FLASH, control finalization of this
                //           by delaying reset by reporting false in app_shutdown_handler
                NRF_LOG_INFO("Device will enter bootloader mode.");
                break;
    
            case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
                NRF_LOG_ERROR("Request to enter bootloader mode failed asynchroneously.");
                // YOUR_JOB: Take corrective measures to resolve the issue
                //           like calling APP_ERROR_CHECK to reset the device.
                break;
    
            case BLE_DFU_EVT_RESPONSE_SEND_ERROR:
                NRF_LOG_ERROR("Request to send a response to client failed.");
                // YOUR_JOB: Take corrective measures to resolve the issue
                //           like calling APP_ERROR_CHECK to reset the device.
                APP_ERROR_CHECK(false);
                break;
    
            default:
                NRF_LOG_ERROR("Unknown event from ble_dfu_buttonless.");
                break;
        }
    }
    /**@brief Function for initializing DFU Service.
     */
    static void dfu_init(void)
    {
    		uint32_t           err_code;
    		
    		ble_dfu_buttonless_init_t dfus_init = {0};
    		
    		dfus_init.evt_handler = ble_dfu_evt_handler;
        err_code = ble_dfu_buttonless_init(&dfus_init);
        APP_ERROR_CHECK(err_code);
    }
    
    /**@brief Function for initializing HID Service.
     */
    static void hids_init(void)
    {
        ret_code_t                    err_code;
        ble_hids_init_t               hids_init_obj;
        ble_hids_inp_rep_init_t     * p_input_report;
        ble_hids_outp_rep_init_t    * p_output_report;
        ble_hids_feature_rep_init_t * p_feature_report;
        uint8_t                       hid_info_flags;
    
        static ble_hids_inp_rep_init_t     input_report_array[INPUT_REPORT_COUNT];
        static ble_hids_outp_rep_init_t    output_report_array[1];
        static ble_hids_feature_rep_init_t feature_report_array[1];
        static uint8_t rep_map_data[] =
        {
            0x05, 0x01, // Usage Page (Generic Desktop)
            0x09, 0x02, // Usage (Mouse)
    
            0xA1, 0x01, // Collection (Application)
    
            // Report ID 1: Mouse buttons + scroll/pan
            0x85, 0x01,       // Report Id 1
            0x09, 0x01,       // Usage (Pointer)
            0xA1, 0x00,       // Collection (Physical)
            0x95, 0x05,       // Report Count (3)
            0x75, 0x01,       // Report Size (1)
            0x05, 0x09,       // Usage Page (Buttons)
            0x19, 0x01,       // Usage Minimum (01)
            0x29, 0x05,       // Usage Maximum (05)
            0x15, 0x00,       // Logical Minimum (0)
            0x25, 0x01,       // Logical Maximum (1)
            0x81, 0x02,       // Input (Data, Variable, Absolute)
            0x95, 0x01,       // Report Count (1)
            0x75, 0x03,       // Report Size (3)
            0x81, 0x01,       // Input (Constant) for padding
            0x75, 0x08,       // Report Size (8)
            0x95, 0x01,       // Report Count (1)
            0x05, 0x01,       // Usage Page (Generic Desktop)
            0x09, 0x38,       // Usage (Wheel)
            0x15, 0x81,       // Logical Minimum (-127)
            0x25, 0x7F,       // Logical Maximum (127)
            0x81, 0x06,       // Input (Data, Variable, Relative)
            0x05, 0x0C,       // Usage Page (Consumer)
            0x0A, 0x38, 0x02, // Usage (AC Pan)
            0x95, 0x01,       // Report Count (1)
            0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
            0xC0,             // End Collection (Physical)
    
            // Report ID 2: Mouse motion
            0x85, 0x02,       // Report Id 2
            0x09, 0x01,       // Usage (Pointer)
            0xA1, 0x00,       // Collection (Physical)
            0x75, 0x0C,       // Report Size (12)
            0x95, 0x02,       // Report Count (2)
            0x05, 0x01,       // Usage Page (Generic Desktop)
            0x09, 0x30,       // Usage (X)
            0x09, 0x31,       // Usage (Y)
            0x16, 0x01, 0xF8, // Logical maximum (2047)
            0x26, 0xFF, 0x07, // Logical minimum (-2047)
            0x81, 0x06,       // Input (Data, Variable, Relative)
            0xC0,             // End Collection (Physical)
            0xC0,             // End Collection (Application)
    
            // Report ID 3: Advanced buttons
            0x05, 0x0C,       // Usage Page (Consumer)
            0x09, 0x01,       // Usage (Consumer Control)
            0xA1, 0x01,       // Collection (Application)
            0x85, 0x03,       // Report Id (3)
            0x15, 0x00,       // Logical minimum (0)
            0x25, 0x01,       // Logical maximum (1)
            0x75, 0x01,       // Report Size (1)
            0x95, 0x01,       // Report Count (1)
    
            0x09, 0xCD,       // Usage (Play/Pause)
            0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
            0x0A, 0x83, 0x01, // Usage (AL Consumer Control Configuration)
            0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
            0x09, 0xB5,       // Usage (Scan Next Track)
            0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
            0x09, 0xB6,       // Usage (Scan Previous Track)
            0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
    
            0x09, 0xEA,       // Usage (Volume Down)
            0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
            0x09, 0xE9,       // Usage (Volume Up)
            0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
            0x0A, 0x25, 0x02, // Usage (AC Forward)
            0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
            0x0A, 0x24, 0x02, // Usage (AC Back)
            0x81, 0x06,       // Input (Data,Value,Relative,Bit Field)
            0xC0,              // End Collection
    
    				// Report ID 4: Key board
            0x05, 0x01,       // Usage Page (Generic Desktop)
            0x09, 0x06,       // Usage (Keyboard)
            0xA1, 0x01,       // Collection (Application)
    				0x85, 0x04,       // Report Id (4)
            0x05, 0x07,       // Usage Page (Key Codes)
            0x19, 0xe0,       // Usage Minimum (224)
            0x29, 0xe7,       // Usage Maximum (231)
            0x15, 0x00,       // Logical Minimum (0)
            0x25, 0x01,       // Logical Maximum (1)
            0x75, 0x01,       // Report Size (1)
            0x95, 0x08,       // Report Count (8)
            0x81, 0x02,       // Input (Data, Variable, Absolute)
    
            0x95, 0x01,       // Report Count (1)
            0x75, 0x08,       // Report Size (8)
            0x81, 0x01,       // Input (Constant) reserved byte(1)
    
            0x95, 0x05,       // Report Count (5)
            0x75, 0x01,       // Report Size (1)
            0x05, 0x08,       // Usage Page (Page# for LEDs)
            0x19, 0x01,       // Usage Minimum (1)
            0x29, 0x05,       // Usage Maximum (5)
            0x91, 0x02,       // Output (Data, Variable, Absolute), Led report
            0x95, 0x01,       // Report Count (1)
            0x75, 0x03,       // Report Size (3)
            0x91, 0x01,       // Output (Data, Variable, Absolute), Led report padding
    
            0x95, 0x06,       // Report Count (6)
            0x75, 0x08,       // Report Size (8)
            0x15, 0x00,       // Logical Minimum (0)
            0x25, 0x65,       // Logical Maximum (101)
            0x05, 0x07,       // Usage Page (Key codes)
            0x19, 0x00,       // Usage Minimum (0)
            0x29, 0x65,       // Usage Maximum (101)
            0x81, 0x00,       // Input (Data, Array) Key array(6 bytes)
    
            0x09, 0x05,       // Usage (Vendor Defined)
            0x15, 0x00,       // Logical Minimum (0)
            0x26, 0xFF, 0x00, // Logical Maximum (255)
            0x75, 0x08,       // Report Size (8 bit)
            0x95, 0x02,       // Report Count (2)
            0xB1, 0x02,       // Feature (Data, Variable, Absolute)
    
            0xC0              // End Collection (Application)
    		
        };
    		//Key
        memset((void *)input_report_array, 0, sizeof(ble_hids_inp_rep_init_t));
        memset((void *)output_report_array, 0, sizeof(ble_hids_outp_rep_init_t));
        memset((void *)feature_report_array, 0, sizeof(ble_hids_feature_rep_init_t));
    		
        // Initialize HID Service.
        p_input_report                      = &input_report_array[INPUT_REP_BUTTONS_INDEX];
        p_input_report->max_len             = INPUT_REP_BUTTONS_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_BUTTONS_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_input_report                      = &input_report_array[INPUT_REP_MOVEMENT_INDEX];
        p_input_report->max_len             = INPUT_REP_MOVEMENT_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_MOVEMENT_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_input_report                      = &input_report_array[INPUT_REP_MPLAYER_INDEX];
        p_input_report->max_len             = INPUT_REP_MEDIA_PLAYER_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_MPLAYER_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;		
    		
    		//Key
        p_input_report                      = &input_report_array[INPUT_REPORT_KEYS_INDEX];
        p_input_report->max_len             = INPUT_REPORT_KEYS_MAX_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_output_report                      = &output_report_array[OUTPUT_REPORT_INDEX];
        p_output_report->max_len             = OUTPUT_REPORT_MAX_LEN;
        p_output_report->rep_ref.report_id   = OUTPUT_REP_REF_ID;
        p_output_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_OUTPUT;
    
        p_output_report->sec.wr = SEC_JUST_WORKS;
        p_output_report->sec.rd = SEC_JUST_WORKS;
    
        p_feature_report                      = &feature_report_array[FEATURE_REPORT_INDEX];
        p_feature_report->max_len             = FEATURE_REPORT_MAX_LEN;
        p_feature_report->rep_ref.report_id   = FEATURE_REP_REF_ID;
        p_feature_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_FEATURE;
    
        p_feature_report->sec.rd              = SEC_JUST_WORKS;
        p_feature_report->sec.wr              = SEC_JUST_WORKS;		
    
        hid_info_flags = HID_INFO_FLAG_REMOTE_WAKE_MSK | HID_INFO_FLAG_NORMALLY_CONNECTABLE_MSK;
    
        memset(&hids_init_obj, 0, sizeof(hids_init_obj));
    
        hids_init_obj.evt_handler                    = on_hids_evt;
        hids_init_obj.error_handler                  = service_error_handler;
        hids_init_obj.is_kb                          = true;
        hids_init_obj.is_mouse                       = true;
        hids_init_obj.inp_rep_count                  = INPUT_REPORT_COUNT;
        hids_init_obj.p_inp_rep_array                = input_report_array;
        hids_init_obj.outp_rep_count                 = 1;
        hids_init_obj.p_outp_rep_array               = output_report_array;
        hids_init_obj.feature_rep_count              = 1;
        hids_init_obj.p_feature_rep_array            = feature_report_array;
        hids_init_obj.rep_map.data_len               = sizeof(rep_map_data);
        hids_init_obj.rep_map.p_data                 = rep_map_data;
        hids_init_obj.hid_information.bcd_hid        = BASE_USB_HID_SPEC_VERSION;
        hids_init_obj.hid_information.b_country_code = 0;
        hids_init_obj.hid_information.flags          = hid_info_flags;
        hids_init_obj.included_services_count        = 0;
        hids_init_obj.p_included_services_array      = NULL;
    
        hids_init_obj.rep_map.rd_sec         = SEC_JUST_WORKS;
        hids_init_obj.hid_information.rd_sec = SEC_JUST_WORKS;
    		//Key
        hids_init_obj.boot_kb_inp_rep_sec.cccd_wr = SEC_JUST_WORKS;
        hids_init_obj.boot_kb_inp_rep_sec.rd      = SEC_JUST_WORKS;
    
        hids_init_obj.boot_kb_outp_rep_sec.rd = SEC_JUST_WORKS;
        hids_init_obj.boot_kb_outp_rep_sec.wr = SEC_JUST_WORKS;
    
        hids_init_obj.boot_mouse_inp_rep_sec.cccd_wr = SEC_JUST_WORKS;
        hids_init_obj.boot_mouse_inp_rep_sec.wr      = SEC_JUST_WORKS;
        hids_init_obj.boot_mouse_inp_rep_sec.rd      = SEC_JUST_WORKS;
    
        hids_init_obj.protocol_mode_rd_sec = SEC_JUST_WORKS;
        hids_init_obj.protocol_mode_wr_sec = SEC_JUST_WORKS;
        hids_init_obj.ctrl_point_wr_sec    = SEC_JUST_WORKS;
    
        err_code = ble_hids_init(&m_hids, &hids_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing services that will be used by the application.
     */
    static void services_init(void)
    {
        qwr_init();
        dis_init();
        bas_init();
        hids_init();
    		dfu_init();
    }
    
    /**@brief Function for initializing the battery sensor simulator.
     */
    //static void sensor_simulator_init(void)
    //{
    //    m_battery_sim_cfg.min          = MIN_BATTERY_LEVEL;
    //    m_battery_sim_cfg.max          = MAX_BATTERY_LEVEL;
    //    m_battery_sim_cfg.incr         = BATTERY_LEVEL_INCREMENT;
    //    m_battery_sim_cfg.start_at_max = true;
    
    //    sensorsim_init(&m_battery_sim_state, &m_battery_sim_cfg);
    //}
    
    
    /**@brief Function for handling a Connection Parameters error.
     *
     * @param[in]   nrf_error   Error code containing information about what went wrong.
     */
    static void conn_params_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    
    
    /**@brief Function for initializing the Connection Parameters module.
     */
    static void conn_params_init(void)
    {
        ret_code_t             err_code;
        ble_conn_params_init_t cp_init;
    
        memset(&cp_init, 0, sizeof(cp_init));
    
        cp_init.p_conn_params                  = NULL;
        cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
        cp_init.next_conn_params_update_delay  = NEXT_CONN_PARAMS_UPDATE_DELAY;
        cp_init.max_conn_params_update_count   = MAX_CONN_PARAM_UPDATE_COUNT;
        cp_init.start_on_notify_cccd_handle    = BLE_GATT_HANDLE_INVALID;
        cp_init.disconnect_on_fail             = false;
        cp_init.evt_handler                    = NULL;
        cp_init.error_handler                  = conn_params_error_handler;
    
        err_code = ble_conn_params_init(&cp_init);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for starting timers.
     */
    static void timers_start(void)
    {
        ret_code_t err_code;
    
        err_code = app_timer_start(m_battery_timer_id, BATTERY_LEVEL_MEAS_INTERVAL, NULL);
        APP_ERROR_CHECK(err_code);
    }
    
    /**@brief   Function for transmitting a key scan Press & Release Notification.
     *
     * @warning This handler is an example only. You need to analyze how you wish to send the key
     *          release.
     *
     * @param[in]  p_instance     Identifies the service for which Key Notifications are requested.
     * @param[in]  p_key_pattern  Pointer to key pattern.
     * @param[in]  pattern_len    Length of key pattern. 0 < pattern_len < 7.
     * @param[in]  pattern_offset Offset applied to Key Pattern for transmission.
     * @param[out] actual_len     Provides actual length of Key Pattern transmitted, making buffering of
     *                            rest possible if needed.
     * @return     NRF_SUCCESS on success, NRF_ERROR_RESOURCES in case transmission could not be
     *             completed due to lack of transmission buffer or other error codes indicating reason
     *             for failure.
     *
     * @note       In case of NRF_ERROR_RESOURCES, remaining pattern that could not be transmitted
     *             can be enqueued \ref buffer_enqueue function.
     *             In case a pattern of 'cofFEe' is the p_key_pattern, with pattern_len as 6 and
     *             pattern_offset as 0, the notifications as observed on the peer side would be
     *             1>    'c', 'o', 'f', 'F', 'E', 'e'
     *             2>    -  , 'o', 'f', 'F', 'E', 'e'
     *             3>    -  ,   -, 'f', 'F', 'E', 'e'
     *             4>    -  ,   -,   -, 'F', 'E', 'e'
     *             5>    -  ,   -,   -,   -, 'E', 'e'
     *             6>    -  ,   -,   -,   -,   -, 'e'
     *             7>    -  ,   -,   -,   -,   -,  -
     *             Here, '-' refers to release, 'c' refers to the key character being transmitted.
     *             Therefore 7 notifications will be sent.
     *             In case an offset of 4 was provided, the pattern notifications sent will be from 5-7
     *             will be transmitted.
     */
    static uint32_t send_key_scan_press_release(ble_hids_t * p_hids,
                                                uint8_t    * p_key_pattern,
                                                uint16_t     pattern_len,
                                                uint16_t     pattern_offset,
                                                uint16_t   * p_actual_len)
    {
        ret_code_t err_code;
        uint16_t offset;
        uint16_t data_len;
        uint8_t  data[INPUT_REPORT_KEYS_MAX_LEN];
    
        // HID Report Descriptor enumerates an array of size 6, the pattern hence shall not be any
        // longer than this.
        STATIC_ASSERT((INPUT_REPORT_KEYS_MAX_LEN - 2) == 6);
    
        ASSERT(pattern_len <= (INPUT_REPORT_KEYS_MAX_LEN - 2));
    
        offset   = pattern_offset;
        data_len = pattern_len;
    
        do
        {
            // Reset the data buffer.
            memset(data, 0, sizeof(data));
    
            // Copy the scan code.
            memcpy(data + SCAN_CODE_POS + offset, p_key_pattern + offset, data_len - offset);
    
    				//Shift button
    //        if (bsp_button_is_pressed(SHIFT_BUTTON_ID))
    //        {
    //            data[MODIFIER_KEY_POS] |= SHIFT_KEY_CODE;
    //        }
    //				data[MODIFIER_KEY_POS] |= SHIFT_KEY_CODE;
    
            if (!m_in_boot_mode)
            {
                err_code = ble_hids_inp_rep_send(p_hids,
                                                 INPUT_REPORT_KEYS_INDEX,
                                                 INPUT_REPORT_KEYS_MAX_LEN,
                                                 data,
                                                 m_conn_handle);
            }
            else
            {
                err_code = ble_hids_boot_kb_inp_rep_send(p_hids,
                                                         INPUT_REPORT_KEYS_MAX_LEN,
                                                         data,
                                                         m_conn_handle);
            }
    
            if (err_code != NRF_SUCCESS)
            {
                break;
            }
    
            offset++;
        }
        while (offset <= data_len);
    
        *p_actual_len = offset;
    
        return err_code;
    }
    
    
    /**@brief   Function for initializing the buffer queue used to key events that could not be
     *          transmitted
     *
     * @warning This handler is an example only. You need to analyze how you wish to buffer or buffer at
     *          all.
     *
     * @note    In case of HID keyboard, a temporary buffering could be employed to handle scenarios
     *          where encryption is not yet enabled or there was a momentary link loss or there were no
     *          Transmit buffers.
     */
    static void buffer_init(void)
    {
        uint32_t buffer_count;
    
        BUFFER_LIST_INIT();
    
        for (buffer_count = 0; buffer_count < MAX_BUFFER_ENTRIES; buffer_count++)
        {
            BUFFER_ELEMENT_INIT(buffer_count);
        }
    }
    
    
    /**@brief Function for enqueuing key scan patterns that could not be transmitted either completely
     *        or partially.
     *
     * @warning This handler is an example only. You need to analyze how you wish to send the key
     *          release.
     *
     * @param[in]  p_hids         Identifies the service for which Key Notifications are buffered.
     * @param[in]  p_key_pattern  Pointer to key pattern.
     * @param[in]  pattern_len    Length of key pattern.
     * @param[in]  offset         Offset applied to Key Pattern when requesting a transmission on
     *                            dequeue, @ref buffer_dequeue.
     * @return     NRF_SUCCESS on success, else an error code indicating reason for failure.
     */
    static uint32_t buffer_enqueue(ble_hids_t * p_hids,
                                   uint8_t    * p_key_pattern,
                                   uint16_t     pattern_len,
                                   uint16_t     offset)
    {
        buffer_entry_t * element;
        uint32_t         err_code = NRF_SUCCESS;
    
        if (BUFFER_LIST_FULL())
        {
            // Element cannot be buffered.
            err_code = NRF_ERROR_NO_MEM;
        }
        else
        {
            // Make entry of buffer element and copy data.
            element              = &buffer_list.buffer[(buffer_list.wp)];
            element->p_instance  = p_hids;
            element->p_data      = p_key_pattern;
            element->data_offset = offset;
            element->data_len    = pattern_len;
    
            buffer_list.count++;
            buffer_list.wp++;
    
            if (buffer_list.wp == MAX_BUFFER_ENTRIES)
            {
                buffer_list.wp = 0;
            }
        }
    
        return err_code;
    }
    /**@brief   Function to dequeue key scan patterns that could not be transmitted either completely of
     *          partially.
     *
     * @warning This handler is an example only. You need to analyze how you wish to send the key
     *          release.
     *
     * @param[in]  tx_flag   Indicative of whether the dequeue should result in transmission or not.
     * @note       A typical example when all keys are dequeued with transmission is when link is
     *             disconnected.
     *
     * @return     NRF_SUCCESS on success, else an error code indicating reason for failure.
     */
    static uint32_t buffer_dequeue(bool tx_flag)
    {
        buffer_entry_t * p_element;
        uint32_t         err_code = NRF_SUCCESS;
        uint16_t         actual_len;
    
        if (BUFFER_LIST_EMPTY())
        {
            err_code = NRF_ERROR_NOT_FOUND;
        }
        else
        {
            bool remove_element = true;
    
            p_element = &buffer_list.buffer[(buffer_list.rp)];
    
            if (tx_flag)
            {
                err_code = send_key_scan_press_release(p_element->p_instance,
                                                       p_element->p_data,
                                                       p_element->data_len,
                                                       p_element->data_offset,
                                                       &actual_len);
                // An additional notification is needed for release of all keys, therefore check
                // is for actual_len <= element->data_len and not actual_len < element->data_len
                if ((err_code == NRF_ERROR_RESOURCES) && (actual_len <= p_element->data_len))
                {
                    // Transmission could not be completed, do not remove the entry, adjust next data to
                    // be transmitted
                    p_element->data_offset = actual_len;
                    remove_element         = false;
                }
            }
    
            if (remove_element)
            {
                BUFFER_ELEMENT_INIT(buffer_list.rp);
    
                buffer_list.rp++;
                buffer_list.count--;
    
                if (buffer_list.rp == MAX_BUFFER_ENTRIES)
                {
                    buffer_list.rp = 0;
                }
            }
        }
    
        return err_code;
    }
    /**@brief Function for sending sample key presses to the peer.
     *
     * @param[in]   key_pattern_len   Pattern length.
     * @param[in]   p_key_pattern     Pattern to be sent.
     */
    void keys_send(uint8_t key_pattern_len, uint8_t * p_key_pattern)
    {
        ret_code_t err_code;
        uint16_t actual_len;
    
    		if (m_hid_data.peer_manage == true)
    		{
    				err_code = send_key_scan_press_release(&m_hids,
    																							 p_key_pattern,
    																							 key_pattern_len,
    																							 0,
    																							 &actual_len);
    				// An additional notification is needed for release of all keys, therefore check
    				// is for actual_len <= key_pattern_len and not actual_len < key_pattern_len.
    				if ((err_code == NRF_ERROR_RESOURCES) && (actual_len <= key_pattern_len))
    				{
    						// Buffer enqueue routine return value is not intentionally checked.
    						// Rationale: Its better to have a a few keys missing than have a system
    						// reset. Recommendation is to work out most optimal value for
    						// MAX_BUFFER_ENTRIES to minimize chances of buffer queue full condition
    						UNUSED_VARIABLE(buffer_enqueue(&m_hids, p_key_pattern, key_pattern_len, actual_len));
    				}
    
    
    				if ((err_code != NRF_SUCCESS) &&
    						(err_code != NRF_ERROR_INVALID_STATE) &&
    						(err_code != NRF_ERROR_RESOURCES) &&
    						(err_code != NRF_ERROR_BUSY) &&
    						(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
    					 )
    				{
    						APP_ERROR_HANDLER(err_code);
    				}
    		}
    }
    /**@brief Function for handling the HID Report Characteristic Write event.
     *
     * @param[in]   p_evt   HID service event.
     */
    static void on_hid_rep_char_write(ble_hids_evt_t * p_evt)
    {
        if (p_evt->params.char_write.char_id.rep_type == BLE_HIDS_REP_TYPE_OUTPUT)
        {
            ret_code_t err_code;
            uint8_t  report_val;
            uint8_t  report_index = p_evt->params.char_write.char_id.rep_index;
    
            if (report_index == OUTPUT_REPORT_INDEX)
            {
                // This code assumes that the output report is one byte long. Hence the following
                // static assert is made.
                STATIC_ASSERT(OUTPUT_REPORT_MAX_LEN == 1);
    
                err_code = ble_hids_outp_rep_get(&m_hids,
                                                 report_index,
                                                 OUTPUT_REPORT_MAX_LEN,
                                                 0,
                                                 m_conn_handle,
                                                 &report_val);
                APP_ERROR_CHECK(err_code);
    
                if (!m_caps_on && ((report_val & OUTPUT_REPORT_BIT_MASK_CAPS_LOCK) != 0))
                {
                    // Caps Lock is turned On.
                    NRF_LOG_INFO("Caps Lock is turned On!");
    //                err_code = bsp_indication_set(BSP_INDICATE_ALERT_3);
    //                APP_ERROR_CHECK(err_code);
    
                    keys_send(sizeof(m_caps_on_key_scan_str), m_caps_on_key_scan_str);
                    m_caps_on = true;
                }
                else if (m_caps_on && ((report_val & OUTPUT_REPORT_BIT_MASK_CAPS_LOCK) == 0))
                {
                    // Caps Lock is turned Off .
                    NRF_LOG_INFO("Caps Lock is turned Off!");
    //                err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF);
    //                APP_ERROR_CHECK(err_code);
    
                    keys_send(sizeof(m_caps_off_key_scan_str), m_caps_off_key_scan_str);
                    m_caps_on = false;
                }
                else
                {
                    // The report received is not supported by this application. Do nothing.
                }
            }
        }
    }
    /**@brief Function for putting the chip into sleep mode.
     *
     * @note This function will not return.
     */
    //static void sleep_mode_enter(void)
    //{
    //    ret_code_t err_code;
    
    //    err_code = bsp_indication_set(BSP_INDICATE_IDLE);
    //    APP_ERROR_CHECK(err_code);
    
    //    // Prepare wakeup buttons.
    //    err_code = bsp_btn_ble_sleep_mode_prepare();
    //    APP_ERROR_CHECK(err_code);
    
    //    // Go to system-off mode (this function will not return; wakeup will cause a reset).
    //    err_code = sd_power_system_off();
    //    APP_ERROR_CHECK(err_code);
    //}
    
    
    /**@brief Function for handling HID events.
     *
     * @details This function will be called for all HID events which are passed to the application.
     *
     * @param[in]   p_hids  HID service structure.
     * @param[in]   p_evt   Event received from the HID service.
     */
    static void on_hids_evt(ble_hids_t * p_hids, ble_hids_evt_t * p_evt)
    {
        switch (p_evt->evt_type)
        {
            case BLE_HIDS_EVT_BOOT_MODE_ENTERED:
                m_in_boot_mode = true;
                break;
    
            case BLE_HIDS_EVT_REPORT_MODE_ENTERED:
                m_in_boot_mode = false;
                break;
    
    				case BLE_HIDS_EVT_REP_CHAR_WRITE:
                on_hid_rep_char_write(p_evt);
                break;
    				
            case BLE_HIDS_EVT_NOTIF_ENABLED:
                break;
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief Function for handling advertising events.
     *
     * @details This function will be called for advertising events which are passed to the application.
     *
     * @param[in] ble_adv_evt  Advertising event.
     */
    static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
    {
        ret_code_t err_code;
    
        switch (ble_adv_evt)
        {
            case BLE_ADV_EVT_DIRECTED_HIGH_DUTY:
                NRF_LOG_INFO("Directed advertising.");
    //            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_DIRECTED);
    //            APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_FAST:
                NRF_LOG_INFO("Fast advertising.");
    //            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    //            APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_SLOW:
                NRF_LOG_INFO("Slow advertising.");
    #if SWIFT_PAIR_SUPPORTED == 1
                m_sp_advdata.p_manuf_specific_data = NULL;
                err_code = ble_advertising_advdata_update(&m_advertising, &m_sp_advdata, NULL);
                APP_ERROR_CHECK(err_code);
    #endif
    //            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_SLOW);
    //            APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_FAST_WHITELIST:
                NRF_LOG_INFO("Fast advertising with whitelist.");
    //            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_WHITELIST);
    //            APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_SLOW_WHITELIST:
                NRF_LOG_INFO("Slow advertising with whitelist.");
    //            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING_WHITELIST);
    //            APP_ERROR_CHECK(err_code);
                err_code = ble_advertising_restart_without_whitelist(&m_advertising);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_ADV_EVT_IDLE:
    //            err_code = bsp_indication_set(BSP_INDICATE_IDLE);
    //            APP_ERROR_CHECK(err_code);
    //            sleep_mode_enter();
    						NRF_LOG_INFO("Device stop advertising.");
    						m_hid_data.ble_status = DEVICE_ADV_STOP;
                break;
    
            case BLE_ADV_EVT_WHITELIST_REQUEST:
            {
                ble_gap_addr_t whitelist_addrs[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
                ble_gap_irk_t  whitelist_irks[BLE_GAP_WHITELIST_ADDR_MAX_COUNT];
                uint32_t       addr_cnt = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
                uint32_t       irk_cnt  = BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
    
                err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt,
                                            whitelist_irks,  &irk_cnt);
                APP_ERROR_CHECK(err_code);
                NRF_LOG_DEBUG("pm_whitelist_get returns %d addr in whitelist and %d irk whitelist",
                               addr_cnt,
                               irk_cnt);
    
                // Set the correct identities list (no excluding peers with no Central Address Resolution).
                identities_set(PM_PEER_ID_LIST_SKIP_NO_IRK);
    
                // Apply the whitelist.
                err_code = ble_advertising_whitelist_reply(&m_advertising,
                                                           whitelist_addrs,
                                                           addr_cnt,
                                                           whitelist_irks,
                                                           irk_cnt);
                APP_ERROR_CHECK(err_code);
            }
            break;
    
            case BLE_ADV_EVT_PEER_ADDR_REQUEST:
            {
                pm_peer_data_bonding_t peer_bonding_data;
    
                // Only Give peer address if we have a handle to the bonded peer.
                if (m_peer_id != PM_PEER_ID_INVALID)
                {
    
                    err_code = pm_peer_data_bonding_load(m_peer_id, &peer_bonding_data);
                    if (err_code != NRF_ERROR_NOT_FOUND)
                    {
                        APP_ERROR_CHECK(err_code);
    
                        // Manipulate identities to exclude peers with no Central Address Resolution.
                        identities_set(PM_PEER_ID_LIST_SKIP_ALL);
    
                        ble_gap_addr_t * p_peer_addr = &(peer_bonding_data.peer_ble_id.id_addr_info);
                        err_code = ble_advertising_peer_addr_reply(&m_advertising, p_peer_addr);
                        APP_ERROR_CHECK(err_code);
                    }
    
                }
                break;
            }
    
            default:
                break;
        }
    }
    
    
    /**@brief Function for handling BLE events.
     *
     * @param[in]   p_ble_evt   Bluetooth stack event.
     * @param[in]   p_context   Unused.
     */
    static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
    {
        ret_code_t err_code;
    
        switch (p_ble_evt->header.evt_id)
        {
            case BLE_GAP_EVT_CONNECTED:
                NRF_LOG_INFO("Connected");				
    //            err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    //            APP_ERROR_CHECK(err_code);
    
                m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
    
                err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
                APP_ERROR_CHECK(err_code);
    						if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
    						{
    								m_hid_data.ble_status = DEVICE_CONNECTED;
    						}
                break;
    
            case BLE_GAP_EVT_DISCONNECTED:
    					
    						if(m_hid_data.ble_status == DEVICE_LOW_POWER_WAIT)
    						{
    								sd_ble_gap_adv_stop(m_advertising.adv_handle);
    								NRF_LOG_INFO("Disconnected low power stop adv.");
    						}else
    						{
    								m_hid_data.ble_status = DEVICE_DISCONNECTED;
    								NRF_LOG_INFO("Disconnected timeout.");
    						}
                // LED indication will be changed when advertising starts.
    						(void) buffer_dequeue(false);
    						// Reset m_caps_on variable. Upon reconnect, the HID host will re-send the Output
                // report containing the Caps lock state.
    						m_hid_data.peer_manage = false;
                m_conn_handle = BLE_CONN_HANDLE_INVALID;
    						m_caps_on = false;
                break;
    
            case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
            {
                NRF_LOG_DEBUG("PHY update request.");
                ble_gap_phys_t const phys =
                {
                    .rx_phys = BLE_GAP_PHY_AUTO,
                    .tx_phys = BLE_GAP_PHY_AUTO,
                };
                err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
                APP_ERROR_CHECK(err_code);
            } break;
    				
            case BLE_GATTS_EVT_HVN_TX_COMPLETE:
                // Send next key event
                (void) buffer_dequeue(true);
                break;
    
            case BLE_GATTC_EVT_TIMEOUT:
                // Disconnect on GATT Client timeout event.
                NRF_LOG_DEBUG("GATT Client Timeout.");
                err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
                                                 BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                APP_ERROR_CHECK(err_code);
                break;
    
            case BLE_GATTS_EVT_TIMEOUT:
                // Disconnect on GATT Server timeout event.
                NRF_LOG_DEBUG("GATT Server Timeout.");
                err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
                                                 BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
                APP_ERROR_CHECK(err_code);
                break;
    
            default:
                // No implementation needed.
                break;
        }
    }
    
    
    /**@brief Function for initializing the BLE stack.
     *
     * @details Initializes the SoftDevice and the BLE event interrupt.
     */
    static void ble_stack_init(void)
    {
        ret_code_t err_code;
    
        err_code = nrf_sdh_enable_request();
        APP_ERROR_CHECK(err_code);
    
        // Configure the BLE stack using the default settings.
        // Fetch the start address of the application RAM.
        uint32_t ram_start = 0;
        err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
        APP_ERROR_CHECK(err_code);
    
        // Enable BLE stack.
        err_code = nrf_sdh_ble_enable(&ram_start);
        APP_ERROR_CHECK(err_code);
    
        // Register a handler for BLE events.
        NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
    }
    
    
    /**@brief Function for the Peer Manager initialization.
     */
    static void peer_manager_init(void)
    {
        ble_gap_sec_params_t sec_param;
        ret_code_t           err_code;
    
        err_code = pm_init();
        APP_ERROR_CHECK(err_code);
    
        memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));
    
        // Security parameters to be used for all security procedures.
        sec_param.bond           = SEC_PARAM_BOND;
        sec_param.mitm           = SEC_PARAM_MITM;
        sec_param.lesc           = SEC_PARAM_LESC;
        sec_param.keypress       = SEC_PARAM_KEYPRESS;
        sec_param.io_caps        = SEC_PARAM_IO_CAPABILITIES;
        sec_param.oob            = SEC_PARAM_OOB;
        sec_param.min_key_size   = SEC_PARAM_MIN_KEY_SIZE;
        sec_param.max_key_size   = SEC_PARAM_MAX_KEY_SIZE;
        sec_param.kdist_own.enc  = 1;
        sec_param.kdist_own.id   = 1;
        sec_param.kdist_peer.enc = 1;
        sec_param.kdist_peer.id  = 1;
    
        err_code = pm_sec_params_set(&sec_param);
        APP_ERROR_CHECK(err_code);
    
        err_code = pm_register(pm_evt_handler);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the Advertising functionality.
     */
    static void advertising_init(void)
    {
        ret_code_t             err_code;
        uint8_t                adv_flags;
        ble_advertising_init_t init;
    
        memset(&init, 0, sizeof(init));
    
        adv_flags                            = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
        init.advdata.name_type               = BLE_ADVDATA_FULL_NAME;
        init.advdata.include_appearance      = true;
        init.advdata.flags                   = adv_flags;
        init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
        init.advdata.uuids_complete.p_uuids  = m_adv_uuids;
    #if SWIFT_PAIR_SUPPORTED == 1
        init.advdata.p_manuf_specific_data = &m_sp_manuf_advdata;
        memcpy(&m_sp_advdata, &init.advdata, sizeof(m_sp_advdata));
    #endif
    
        init.config.ble_adv_whitelist_enabled          = true;
        init.config.ble_adv_directed_high_duty_enabled = true;
        init.config.ble_adv_directed_enabled           = false;
        init.config.ble_adv_directed_interval          = 0;
        init.config.ble_adv_directed_timeout           = 0;
        init.config.ble_adv_fast_enabled               = true;
        init.config.ble_adv_fast_interval              = APP_ADV_FAST_INTERVAL;
        init.config.ble_adv_fast_timeout               = APP_ADV_FAST_DURATION;
        init.config.ble_adv_slow_enabled               = true;
        init.config.ble_adv_slow_interval              = APP_ADV_SLOW_INTERVAL;
        init.config.ble_adv_slow_timeout               = APP_ADV_SLOW_DURATION;
    
        init.evt_handler   = on_adv_evt;
        init.error_handler = ble_advertising_error_handler;
    
        err_code = ble_advertising_init(&m_advertising, &init);
        APP_ERROR_CHECK(err_code);
    
        ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
    }
    
    
    /**@brief Function for the Event Scheduler initialization.
     */
    static void scheduler_init(void)
    {
        APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);
    }
    
    
    /**@brief Function for sending a Mouse Movement.
     *
     * @param[in]   x_delta   Horizontal movement.
     * @param[in]   y_delta   Vertical movement.
     */
    void mouse_movement_send(int16_t x_delta, int16_t y_delta)
    {
        ret_code_t err_code;
    
    		if (m_hid_data.peer_manage == true)
    		{
    				if (m_in_boot_mode)
    				{
    						x_delta = MIN(x_delta, 0x00ff);
    						y_delta = MIN(y_delta, 0x00ff);
    
    						err_code = ble_hids_boot_mouse_inp_rep_send(&m_hids,
    																												0x00,
    																												(int8_t)x_delta,
    																												(int8_t)y_delta,
    																												0,
    																												NULL,
    																												m_conn_handle);
    				}
    				else
    				{
    						uint8_t buffer[INPUT_REP_MOVEMENT_LEN];
    
    						APP_ERROR_CHECK_BOOL(INPUT_REP_MOVEMENT_LEN == 3);
    
    						x_delta = MIN(x_delta, 0x0fff);
    						y_delta = MIN(y_delta, 0x0fff);
    
    						buffer[0] = x_delta & 0x00ff;
    						buffer[1] = ((y_delta & 0x000f) << 4) | ((x_delta & 0x0f00) >> 8);
    						buffer[2] = (y_delta & 0x0ff0) >> 4;
    
    						err_code = ble_hids_inp_rep_send(&m_hids,
    																						 INPUT_REP_MOVEMENT_INDEX,
    																						 INPUT_REP_MOVEMENT_LEN,
    																						 buffer,
    																						 m_conn_handle);
    				}
    
    				if ((err_code != NRF_SUCCESS) &&
    						(err_code != NRF_ERROR_INVALID_STATE) &&
    						(err_code != NRF_ERROR_RESOURCES) &&
    						(err_code != NRF_ERROR_BUSY) &&
    						(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
    					 )
    				{
    						APP_ERROR_HANDLER(err_code);
    				}
    				
    		}
    }
    /**@brief Function for media data.
     * 
     * @param[in]   control --- hid media data
     *
    */  
    void m_button_media_player_control(uint8_t control)
    {
    		uint32_t err_code;
    		uint8_t buffer[1];
    		buffer[0] = control;
    		if (m_hid_data.peer_manage == true)
    		{
    				err_code = ble_hids_inp_rep_send( &m_hids,
    																					INPUT_REP_MPLAYER_INDEX,
    																					1,
    																					buffer,
    																					m_conn_handle);
    				if(( err_code != NRF_SUCCESS ) &&
    					 ( err_code != NRF_ERROR_INVALID_STATE ) &&
    					 ( err_code != NRF_ERROR_RESOURCES ) &&
    					 ( err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING ))
    					{
    						APP_ERROR_HANDLER( err_code );
    					}
    					
    				buffer[0] = 0;
    				err_code = ble_hids_inp_rep_send( &m_hids,
    																					INPUT_REP_MPLAYER_INDEX,
    																					1,
    																					buffer,
    																					m_conn_handle);
    				if(( err_code != NRF_SUCCESS ) &&
    					 ( err_code != NRF_ERROR_INVALID_STATE ) &&
    					 ( err_code != NRF_ERROR_RESOURCES ) &&
    					 ( err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING ))
    					{
    						APP_ERROR_HANDLER( err_code );
    					}
    		}
    }
    /**@brief Function for buttons
     * 
     * @param[in]   buttons --- hid media data
     *
     * @details click 1 2 4 左 右 中
                wheel  -127 to +127 上下滑动
    						pan    -127 to +127 左右滑动
    */  
    void mouse_buttons_send(int8_t click, int8_t wheel, int8_t pan)
    {
    		 uint32_t err_code;
    	 
    		uint8_t buffer[INPUT_REP_BUTTONS_LEN];
    	
    		if (m_hid_data.peer_manage == true)
    		{
    	 
    				APP_ERROR_CHECK_BOOL(INPUT_REP_BUTTONS_LEN == 3);
    				
    				NRF_LOG_INFO("mouse_buttons_send\r\n");
    				buffer[0] = click;
    				buffer[1] = wheel;
    				buffer[2] = pan;
    			 
    				err_code = ble_hids_inp_rep_send(	&m_hids, 
    																					INPUT_REP_BUTTONS_INDEX, 
    																					INPUT_REP_BUTTONS_LEN, 
    																					buffer,
    																					m_conn_handle);
    			 
    					if ((err_code != NRF_SUCCESS) &&
    							(err_code != NRF_ERROR_INVALID_STATE) &&
    							(err_code != NRF_ERROR_RESOURCES) &&
    							(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
    						 )
    					{
    							APP_ERROR_HANDLER(err_code);
    					}
    		}
    }
    /**@brief Function for handling events from the BSP module.
     *
     * @param[in]   event   Event generated by button press.
     */
    //static void bsp_event_handler(bsp_event_t event)
    //{
    //    ret_code_t err_code;
    
    //    switch (event)
    //    {
    //        case BSP_EVENT_SLEEP:
    //            sleep_mode_enter();
    //            break;
    
    //        case BSP_EVENT_DISCONNECT:
    //            err_code = sd_ble_gap_disconnect(m_conn_handle,
    //                                             BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    //            if (err_code != NRF_ERROR_INVALID_STATE)
    //            {
    //                APP_ERROR_CHECK(err_code);
    //            }
    //            break;
    
    //        case BSP_EVENT_WHITELIST_OFF:
    //            if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
    //            {
    //                err_code = ble_advertising_restart_without_whitelist(&m_advertising);
    //                if (err_code != NRF_ERROR_INVALID_STATE)
    //                {
    //                    APP_ERROR_CHECK(err_code);
    //                }
    //            }
    //            break;
    
    //        case BSP_EVENT_KEY_0:
    //            if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
    //            {
    //                mouse_movement_send(-MOVEMENT_SPEED, 0);
    //            }
    //            break;
    
    //        case BSP_EVENT_KEY_1:
    //            if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
    //            {
    //                mouse_movement_send(0, -MOVEMENT_SPEED);
    //            }
    //            break;
    
    //        case BSP_EVENT_KEY_2:
    //            if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
    //            {
    //                mouse_movement_send(MOVEMENT_SPEED, 0);
    //            }
    //            break;
    
    //        case BSP_EVENT_KEY_3:
    //            if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
    //            {
    //                mouse_movement_send(0, MOVEMENT_SPEED);
    //            }
    //            break;
    
    //        default:
    //            break;
    //    }
    //}
    
    
    /**@brief Function for initializing buttons and leds.
     *
     * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
     */
    //static void buttons_leds_init(bool * p_erase_bonds)
    //{
    //    ret_code_t err_code;
    //    bsp_event_t startup_event;
    
    //    err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
    
    //    APP_ERROR_CHECK(err_code);
    
    //    err_code = bsp_btn_ble_init(NULL, &startup_event);
    //    APP_ERROR_CHECK(err_code);
    
    //    *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
    //}
    
    
    /**@brief Function for initializing the nrf log module.
     */
    static void log_init(void)
    {
        ret_code_t err_code = NRF_LOG_INIT(NULL);
        APP_ERROR_CHECK(err_code);
    
        NRF_LOG_DEFAULT_BACKENDS_INIT();
    }
    
    
    /**@brief Function for initializing power management.
     */
    static void power_management_init(void)
    {
        ret_code_t err_code;
        err_code = nrf_pwr_mgmt_init();
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling the idle state (main loop).
     *
     * @details If there is no pending log operation, then sleep until next the next event occurs.
     */
    static void idle_state_handle(void)
    {
        app_sched_execute();
        if (NRF_LOG_PROCESS() == false)
        {
            nrf_pwr_mgmt_run();
        }
    }
    
    /**@brief Function for start advertising.
     */
    void m_adv_start(void)
    {
    		advertising_start(false);
    }
    /**@brief Function for disconnect.
     */
    void m_adv_disconnect(void)
    {
    		ret_code_t err_code;
    		if (m_conn_handle != BLE_CONN_HANDLE_INVALID)//连接状态
    		{
    				err_code = sd_ble_gap_disconnect(m_conn_handle,
    																				 BLE_HCI_REMOTE_DEV_TERMINATION_DUE_TO_POWER_OFF);
    				if (err_code != NRF_ERROR_INVALID_STATE)
    				{
    						APP_ERROR_CHECK(err_code);
    				}
    		}else//非连接状态
    		{
    				m_pwm_stop();
    				err_code = sd_ble_gap_adv_stop(m_advertising.adv_handle);
    				APP_ERROR_CHECK(err_code);
    				NRF_LOG_INFO("Normal low power stop adv.");
    		}
    }
    /**@brief Function for application main entry.
     */
    int main(void)
    {
        bool erase_bonds = false;
    		ret_code_t err_code;
    	
        // Initialize.
        log_init();
    	
    	  // Initialize the async SVCI interface to bootloader before any interrupts are enabled.
    //    err_code = ble_dfu_buttonless_async_svci_init();
    //    APP_ERROR_CHECK(err_code);
    	
        timers_init();
    		sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
    //    buttons_leds_init(&erase_bonds);
        power_management_init();
        ble_stack_init();
        scheduler_init();
        gap_params_init();
        gatt_init();
        advertising_init();
        services_init();
    //    sensor_simulator_init();
        conn_params_init();
    		buffer_init();
        peer_manager_init();
    
        // Start execution. 
        NRF_LOG_INFO("HID Mouse example started.");
        timers_start();
    		advertising_start(erase_bonds);
    
    		m_platform_init();
    		m_twi_init();       //TWI init
    		m_pwm_common_init();//PWM init
    		m_paw3003_check();
    		m_button_init();
    		m_paw3003_init();
    		m_system_timer_init();
    		m_led_timer_init();
    
        // Enter main loop.
        for (;;)
        {
    				m_application_handle();
    				m_led_handle();
            idle_state_handle();
        }
    }
    
    
    /**
     * @}
     */
    

  • Hi Taylor,

    No you didn't remove anything too important. It is just the references to the removed code was (very) slightly distracting.

    In any cases, I just reviewed all of your newest codes which is relevant to hids_init() through a line by line comparison with my current implementation.
    Once again, no obvious problems...
    There is one bad BLE_HIDS_DEF setup. However, I have a very similar mistake there until this review, and printing CAPSON/capsof worked for me last week, so I don't think that is the problem...
    The difference between your mistake and mine is due to you basing on mouse example, and me basing on keyboard example.

    Would you mind trying the following steps? The steps might seem a little too brainless, but I feel like the problem is a minor thing somewhere hiding from our mind. After all, I did reproduce your bug, and simply changing OUTPUT_REP_REF_ID fixed it.

    1. Erase the board completely before flashing, retry

    2. Update BLE_HIDS_DEF following my code below, retry

    3. .. just use my entire code below, retry

    #define INPUT_REPORT_COUNT              4   /**< Number of input reports in this application. */
    
    #define INPUT_REP_REF_BUTTONS_ID        1   /**< Id of reference to Mouse Input Report containing button data. */
    #define INPUT_REP_BUTTONS_INDEX         0   /**< Index of Mouse Input Report containing button data. */
    #define INPUT_REP_BUTTONS_LEN           3   /**< Length of Mouse Input Report containing button data. */
    
    #define INPUT_REP_REF_MOVEMENT_ID       2   /**< Id of reference to Mouse Input Report containing movement data. */
    #define INPUT_REP_MOVEMENT_INDEX        1   /**< Index of Mouse Input Report containing movement data. */
    #define INPUT_REP_MOVEMENT_LEN          3   /**< Length of Mouse Input Report containing movement data. */
    
    #define INPUT_REP_REF_MPLAYER_ID        3   /**< Id of reference to Mouse Input Report containing media player data. */
    #define INPUT_REP_MPLAYER_INDEX         2   /**< Index of Mouse Input Report containing media player data. */
    #define INPUT_REP_MEDIA_PLAYER_LEN      1   /**< Length of Mouse Input Report containing media player data. */
    
    #define INPUT_REP_REF_ID                4   /**< Id of reference to Keyboard Input Report. */
    #define INPUT_REPORT_KEYS_INDEX         3   /**< Index of Input Report. */
    #define INPUT_REPORT_KEYS_MAX_LEN       8   /**< Maximum length of the Input Report characteristic. */
    
    #define OUTPUT_REP_REF_ID               4   /**< Id of reference to Keyboard Output Report. */
    #define OUTPUT_REPORT_INDEX             0   /**< Index of Output Report. */
    #define OUTPUT_REPORT_MAX_LEN           1   /**< Maximum length of Output Report. */
    
    BLE_HIDS_DEF(m_hids,                        /**< Structure used to identify the HID service. */
                 NRF_SDH_BLE_TOTAL_LINK_COUNT,
                 INPUT_REP_BUTTONS_LEN,
                 INPUT_REP_MOVEMENT_LEN,
                 INPUT_REP_MEDIA_PLAYER_LEN,
                 INPUT_REPORT_KEYS_MAX_LEN,
                 OUTPUT_REPORT_MAX_LEN,
                 FEATURE_REPORT_MAX_LEN);
    
    static void hids_init(void)
    {
        ret_code_t                    err_code;
        ble_hids_init_t               hids_init_obj;
        ble_hids_inp_rep_init_t     * p_input_report;
        ble_hids_outp_rep_init_t    * p_output_report;
        ble_hids_feature_rep_init_t * p_feature_report;
        uint8_t                       hid_info_flags;
    
        static ble_hids_inp_rep_init_t     input_report_array[INPUT_REPORT_COUNT];
        static ble_hids_outp_rep_init_t    output_report_array[1];
        static ble_hids_feature_rep_init_t feature_report_array[1];
        static uint8_t rep_map_data[] =
        {
    
            0x05, 0x01,       // Usage Page (Generic Desktop)
            0x09, 0x02,       // Usage (Mouse)
            0xA1, 0x01,       // Collection (Application)
    
            // Report ID 1: Mouse buttons + scroll/pan
            0x85, 0x01,           // Report Id 1
            0x09, 0x01,           // Usage (Pointer)
            0xA1, 0x00,           // Collection (Physical)
                                      // Begin of 1.Button
            0x95, 0x05,               // Report Count (3)
            0x75, 0x01,               // Report Size (1)
            0x05, 0x09,               // Usage Page (Buttons)
            0x19, 0x01,               // Usage Minimum (01)
            0x29, 0x05,               // Usage Maximum (05)
            0x15, 0x00,               // Logical Minimum (0)
            0x25, 0x01,               // Logical Maximum (1)
            0x81, 0x02,               // Input (Data, Variable, Absolute)
    
            0x95, 0x01,               // Report Count (1)
            0x75, 0x03,               // Report Size (3)
            0x81, 0x01,               // Input (Constant) for padding
                                      // End of 1.Button
    
                                      // Begin of 1 Wheel
            0x75, 0x08,               // Report Size (8)
            0x95, 0x01,               // Report Count (1)
            0x05, 0x01,               // Usage Page (Generic Desktop)
            0x09, 0x38,               // Usage (Wheel)
            0x15, 0x81,               // Logical Minimum (-127)
            0x25, 0x7F,               // Logical Maximum (127)
            0x81, 0x06,               // Input (Data, Variable, Relative)
                                      // End of 1.Wheel
    
                                      // Begin of 1.AC_Pan
            0x05, 0x0C,               // Usage Page (Consumer)
            0x0A, 0x38, 0x02,         // Usage (AC Pan)
            0x95, 0x01,               // Report Count (1)
            0x81, 0x06,               // Input (Data,Value,Relative,Bit Field)
                                      // End of 1.AC_Pan
    
            0xC0,                 // End Collection (Physical)
                                  // End of 1.
    
            // Report ID 2: Mouse motion
            0x85, 0x02,           // Report Id 2
            0x09, 0x01,           // Usage (Pointer)
            0xA1, 0x00,           // Collection (Physical)
    
                                      // Begin of 2.XY
            0x75, 0x0C,               // Report Size (12)
            0x95, 0x02,               // Report Count (2)
            0x05, 0x01,               // Usage Page (Generic Desktop)
            0x09, 0x30,               // Usage (X)
            0x09, 0x31,               // Usage (Y)
            0x16, 0x01, 0xF8,         // Logical maximum (2047)
            0x26, 0xFF, 0x07,         // Logical minimum (-2047)
            0x81, 0x06,               // Input (Data, Variable, Relative)
                                      // End of 2.XY
    
            0xC0,                 // End Collection (Physical)
                                  // End of 2.
    
            0xC0,             // End Collection (Application)
    
            // Report ID 3: Advanced buttons
            0x05, 0x0C,       // Usage Page (Consumer)
            0x09, 0x01,       // Usage (Consumer Control)
    
                              // Begin of 2.
            0xA1, 0x01,       // Collection (Application)
    
            0x85, 0x03,           // Report Id (3)
            0x15, 0x00,           // Logical minimum (0)
            0x25, 0x01,           // Logical maximum (1)
            0x75, 0x01,           // Report Size (1)
            0x95, 0x01,           // Report Count (1)
    
            0x09, 0xCD,           // Usage (Play/Pause)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x0A, 0x83, 0x01,     // Usage (AL Consumer Control Configuration)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x09, 0xB5,           // Usage (Scan Next Track)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x09, 0xB6,           // Usage (Scan Previous Track)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
    
    
            0x09, 0xEA,           // Usage (Volume Down)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x09, 0xE9,           // Usage (Volume Up)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x0A, 0x25, 0x02,     // Usage (AC Forward)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x0A, 0x24, 0x02,     // Usage (AC Back)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
    
            0xC0,             // End Collection
                              // End of 2.
    
            // Report ID 4: Key board
            0x05, 0x01,       // Usage Page (Generic Desktop)
            0x09, 0x06,       // Usage (Keyboard)
            0xA1, 0x01,       // Collection (Application)
    
            0x85, 0x04,           // Report Id (4)
            0x05, 0x07,           // Usage Page (Key Codes)
            0x19, 0xe0,           // Usage Minimum (224)
            0x29, 0xe7,           // Usage Maximum (231)
            0x15, 0x00,           // Logical Minimum (0)
            0x25, 0x01,           // Logical Maximum (1)
            0x75, 0x01,           // Report Size (1)
            0x95, 0x08,           // Report Count (8)
            0x81, 0x02,           // Input (Data, Variable, Absolute)
    
            0x95, 0x01,           // Report Count (1)
            0x75, 0x08,           // Report Size (8)
            0x81, 0x01,           // Input (Constant) reserved byte(1)
    
            0x95, 0x05,           // Report Count (5)
            0x75, 0x01,           // Report Size (1)
            0x05, 0x08,           // Usage Page (Page# for LEDs)
            0x19, 0x01,           // Usage Minimum (1)
            0x29, 0x05,           // Usage Maximum (5)
            0x91, 0x02,           // Output (Data, Variable, Absolute), Led report
            0x95, 0x01,           // Report Count (1)
            0x75, 0x03,           // Report Size (3)
            0x91, 0x01,           // Output (Data, Variable, Absolute), Led report padding
    
            0x95, 0x06,           // Report Count (6)
            0x75, 0x08,           // Report Size (8)
            0x15, 0x00,           // Logical Minimum (0)
            0x25, 0x65,           // Logical Maximum (101)
            0x05, 0x07,           // Usage Page (Key codes)
            0x19, 0x00,           // Usage Minimum (0)
            0x29, 0x65,           // Usage Maximum (101)
            0x81, 0x00,           // Input (Data, Array) Key array(6 bytes)
    
            0x09, 0x05,           // Usage (Vendor Defined)
            0x15, 0x00,           // Logical Minimum (0)
            0x26, 0xFF, 0x00,     // Logical Maximum (255)
            0x75, 0x08,           // Report Size (8 bit)
            0x95, 0x02,           // Report Count (2)
            0xB1, 0x02,           // Feature (Data, Variable, Absolute)
    
            0xC0              // End Collection (Application)
    
        };
        //Key
        memset((void *)input_report_array, 0, sizeof(ble_hids_inp_rep_init_t));
        memset((void *)output_report_array, 0, sizeof(ble_hids_outp_rep_init_t));
        memset((void *)feature_report_array, 0, sizeof(ble_hids_feature_rep_init_t));
    
        // Initialize HID Service
        p_input_report                      = &input_report_array[INPUT_REP_BUTTONS_INDEX];
        p_input_report->max_len             = INPUT_REP_BUTTONS_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_BUTTONS_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_input_report                      = &input_report_array[INPUT_REP_MOVEMENT_INDEX];
        p_input_report->max_len             = INPUT_REP_MOVEMENT_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_MOVEMENT_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_input_report                      = &input_report_array[INPUT_REP_MPLAYER_INDEX];
        p_input_report->max_len             = INPUT_REP_MEDIA_PLAYER_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_MPLAYER_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        //Key
        p_input_report                      = &input_report_array[INPUT_REPORT_KEYS_INDEX];
        p_input_report->max_len             = INPUT_REPORT_KEYS_MAX_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_output_report                      = &output_report_array[OUTPUT_REPORT_INDEX];
        p_output_report->max_len             = OUTPUT_REPORT_MAX_LEN;
        p_output_report->rep_ref.report_id   = OUTPUT_REP_REF_ID;
        p_output_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_OUTPUT;
    
        p_output_report->sec.wr = SEC_JUST_WORKS;
        p_output_report->sec.rd = SEC_JUST_WORKS;
    
        p_feature_report                      = &feature_report_array[FEATURE_REPORT_INDEX];
        p_feature_report->max_len             = FEATURE_REPORT_MAX_LEN;
        p_feature_report->rep_ref.report_id   = FEATURE_REP_REF_ID;
        p_feature_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_FEATURE;
    
        p_feature_report->sec.rd              = SEC_JUST_WORKS;
        p_feature_report->sec.wr              = SEC_JUST_WORKS;
    
        hid_info_flags = HID_INFO_FLAG_REMOTE_WAKE_MSK | HID_INFO_FLAG_NORMALLY_CONNECTABLE_MSK;
    
        memset(&hids_init_obj, 0, sizeof(hids_init_obj));
    
        hids_init_obj.evt_handler                    = on_hids_evt;
        hids_init_obj.error_handler                  = service_error_handler;
        hids_init_obj.is_kb                          = true;
        hids_init_obj.is_mouse                       = true;
        hids_init_obj.inp_rep_count                  = INPUT_REPORT_COUNT;
        hids_init_obj.p_inp_rep_array                = input_report_array;
        hids_init_obj.outp_rep_count                 = 1;
        hids_init_obj.p_outp_rep_array               = output_report_array;
        hids_init_obj.feature_rep_count              = 1;
        hids_init_obj.p_feature_rep_array            = feature_report_array;
        hids_init_obj.rep_map.data_len               = sizeof(rep_map_data);
        hids_init_obj.rep_map.p_data                 = rep_map_data;
        hids_init_obj.hid_information.bcd_hid        = BASE_USB_HID_SPEC_VERSION;
        hids_init_obj.hid_information.b_country_code = 0;
        hids_init_obj.hid_information.flags          = hid_info_flags;
        hids_init_obj.included_services_count        = 0;
        hids_init_obj.p_included_services_array      = NULL;
    
        hids_init_obj.rep_map.rd_sec         = SEC_JUST_WORKS;
        hids_init_obj.hid_information.rd_sec = SEC_JUST_WORKS;
    
        //Key
        hids_init_obj.boot_kb_inp_rep_sec.cccd_wr = SEC_JUST_WORKS;
        hids_init_obj.boot_kb_inp_rep_sec.rd      = SEC_JUST_WORKS;
    
        hids_init_obj.boot_kb_outp_rep_sec.rd = SEC_JUST_WORKS;
        hids_init_obj.boot_kb_outp_rep_sec.wr = SEC_JUST_WORKS;
    
        hids_init_obj.boot_mouse_inp_rep_sec.cccd_wr = SEC_JUST_WORKS;
        hids_init_obj.boot_mouse_inp_rep_sec.wr      = SEC_JUST_WORKS;
        hids_init_obj.boot_mouse_inp_rep_sec.rd      = SEC_JUST_WORKS;
    
        hids_init_obj.protocol_mode_rd_sec = SEC_JUST_WORKS;
        hids_init_obj.protocol_mode_wr_sec = SEC_JUST_WORKS;
        hids_init_obj.ctrl_point_wr_sec    = SEC_JUST_WORKS;
    
        err_code = ble_hids_init(&m_hids, &hids_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    

Reply
  • Hi Taylor,

    No you didn't remove anything too important. It is just the references to the removed code was (very) slightly distracting.

    In any cases, I just reviewed all of your newest codes which is relevant to hids_init() through a line by line comparison with my current implementation.
    Once again, no obvious problems...
    There is one bad BLE_HIDS_DEF setup. However, I have a very similar mistake there until this review, and printing CAPSON/capsof worked for me last week, so I don't think that is the problem...
    The difference between your mistake and mine is due to you basing on mouse example, and me basing on keyboard example.

    Would you mind trying the following steps? The steps might seem a little too brainless, but I feel like the problem is a minor thing somewhere hiding from our mind. After all, I did reproduce your bug, and simply changing OUTPUT_REP_REF_ID fixed it.

    1. Erase the board completely before flashing, retry

    2. Update BLE_HIDS_DEF following my code below, retry

    3. .. just use my entire code below, retry

    #define INPUT_REPORT_COUNT              4   /**< Number of input reports in this application. */
    
    #define INPUT_REP_REF_BUTTONS_ID        1   /**< Id of reference to Mouse Input Report containing button data. */
    #define INPUT_REP_BUTTONS_INDEX         0   /**< Index of Mouse Input Report containing button data. */
    #define INPUT_REP_BUTTONS_LEN           3   /**< Length of Mouse Input Report containing button data. */
    
    #define INPUT_REP_REF_MOVEMENT_ID       2   /**< Id of reference to Mouse Input Report containing movement data. */
    #define INPUT_REP_MOVEMENT_INDEX        1   /**< Index of Mouse Input Report containing movement data. */
    #define INPUT_REP_MOVEMENT_LEN          3   /**< Length of Mouse Input Report containing movement data. */
    
    #define INPUT_REP_REF_MPLAYER_ID        3   /**< Id of reference to Mouse Input Report containing media player data. */
    #define INPUT_REP_MPLAYER_INDEX         2   /**< Index of Mouse Input Report containing media player data. */
    #define INPUT_REP_MEDIA_PLAYER_LEN      1   /**< Length of Mouse Input Report containing media player data. */
    
    #define INPUT_REP_REF_ID                4   /**< Id of reference to Keyboard Input Report. */
    #define INPUT_REPORT_KEYS_INDEX         3   /**< Index of Input Report. */
    #define INPUT_REPORT_KEYS_MAX_LEN       8   /**< Maximum length of the Input Report characteristic. */
    
    #define OUTPUT_REP_REF_ID               4   /**< Id of reference to Keyboard Output Report. */
    #define OUTPUT_REPORT_INDEX             0   /**< Index of Output Report. */
    #define OUTPUT_REPORT_MAX_LEN           1   /**< Maximum length of Output Report. */
    
    BLE_HIDS_DEF(m_hids,                        /**< Structure used to identify the HID service. */
                 NRF_SDH_BLE_TOTAL_LINK_COUNT,
                 INPUT_REP_BUTTONS_LEN,
                 INPUT_REP_MOVEMENT_LEN,
                 INPUT_REP_MEDIA_PLAYER_LEN,
                 INPUT_REPORT_KEYS_MAX_LEN,
                 OUTPUT_REPORT_MAX_LEN,
                 FEATURE_REPORT_MAX_LEN);
    
    static void hids_init(void)
    {
        ret_code_t                    err_code;
        ble_hids_init_t               hids_init_obj;
        ble_hids_inp_rep_init_t     * p_input_report;
        ble_hids_outp_rep_init_t    * p_output_report;
        ble_hids_feature_rep_init_t * p_feature_report;
        uint8_t                       hid_info_flags;
    
        static ble_hids_inp_rep_init_t     input_report_array[INPUT_REPORT_COUNT];
        static ble_hids_outp_rep_init_t    output_report_array[1];
        static ble_hids_feature_rep_init_t feature_report_array[1];
        static uint8_t rep_map_data[] =
        {
    
            0x05, 0x01,       // Usage Page (Generic Desktop)
            0x09, 0x02,       // Usage (Mouse)
            0xA1, 0x01,       // Collection (Application)
    
            // Report ID 1: Mouse buttons + scroll/pan
            0x85, 0x01,           // Report Id 1
            0x09, 0x01,           // Usage (Pointer)
            0xA1, 0x00,           // Collection (Physical)
                                      // Begin of 1.Button
            0x95, 0x05,               // Report Count (3)
            0x75, 0x01,               // Report Size (1)
            0x05, 0x09,               // Usage Page (Buttons)
            0x19, 0x01,               // Usage Minimum (01)
            0x29, 0x05,               // Usage Maximum (05)
            0x15, 0x00,               // Logical Minimum (0)
            0x25, 0x01,               // Logical Maximum (1)
            0x81, 0x02,               // Input (Data, Variable, Absolute)
    
            0x95, 0x01,               // Report Count (1)
            0x75, 0x03,               // Report Size (3)
            0x81, 0x01,               // Input (Constant) for padding
                                      // End of 1.Button
    
                                      // Begin of 1 Wheel
            0x75, 0x08,               // Report Size (8)
            0x95, 0x01,               // Report Count (1)
            0x05, 0x01,               // Usage Page (Generic Desktop)
            0x09, 0x38,               // Usage (Wheel)
            0x15, 0x81,               // Logical Minimum (-127)
            0x25, 0x7F,               // Logical Maximum (127)
            0x81, 0x06,               // Input (Data, Variable, Relative)
                                      // End of 1.Wheel
    
                                      // Begin of 1.AC_Pan
            0x05, 0x0C,               // Usage Page (Consumer)
            0x0A, 0x38, 0x02,         // Usage (AC Pan)
            0x95, 0x01,               // Report Count (1)
            0x81, 0x06,               // Input (Data,Value,Relative,Bit Field)
                                      // End of 1.AC_Pan
    
            0xC0,                 // End Collection (Physical)
                                  // End of 1.
    
            // Report ID 2: Mouse motion
            0x85, 0x02,           // Report Id 2
            0x09, 0x01,           // Usage (Pointer)
            0xA1, 0x00,           // Collection (Physical)
    
                                      // Begin of 2.XY
            0x75, 0x0C,               // Report Size (12)
            0x95, 0x02,               // Report Count (2)
            0x05, 0x01,               // Usage Page (Generic Desktop)
            0x09, 0x30,               // Usage (X)
            0x09, 0x31,               // Usage (Y)
            0x16, 0x01, 0xF8,         // Logical maximum (2047)
            0x26, 0xFF, 0x07,         // Logical minimum (-2047)
            0x81, 0x06,               // Input (Data, Variable, Relative)
                                      // End of 2.XY
    
            0xC0,                 // End Collection (Physical)
                                  // End of 2.
    
            0xC0,             // End Collection (Application)
    
            // Report ID 3: Advanced buttons
            0x05, 0x0C,       // Usage Page (Consumer)
            0x09, 0x01,       // Usage (Consumer Control)
    
                              // Begin of 2.
            0xA1, 0x01,       // Collection (Application)
    
            0x85, 0x03,           // Report Id (3)
            0x15, 0x00,           // Logical minimum (0)
            0x25, 0x01,           // Logical maximum (1)
            0x75, 0x01,           // Report Size (1)
            0x95, 0x01,           // Report Count (1)
    
            0x09, 0xCD,           // Usage (Play/Pause)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x0A, 0x83, 0x01,     // Usage (AL Consumer Control Configuration)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x09, 0xB5,           // Usage (Scan Next Track)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x09, 0xB6,           // Usage (Scan Previous Track)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
    
    
            0x09, 0xEA,           // Usage (Volume Down)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x09, 0xE9,           // Usage (Volume Up)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x0A, 0x25, 0x02,     // Usage (AC Forward)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
            0x0A, 0x24, 0x02,     // Usage (AC Back)
            0x81, 0x06,           // Input (Data,Value,Relative,Bit Field)
    
            0xC0,             // End Collection
                              // End of 2.
    
            // Report ID 4: Key board
            0x05, 0x01,       // Usage Page (Generic Desktop)
            0x09, 0x06,       // Usage (Keyboard)
            0xA1, 0x01,       // Collection (Application)
    
            0x85, 0x04,           // Report Id (4)
            0x05, 0x07,           // Usage Page (Key Codes)
            0x19, 0xe0,           // Usage Minimum (224)
            0x29, 0xe7,           // Usage Maximum (231)
            0x15, 0x00,           // Logical Minimum (0)
            0x25, 0x01,           // Logical Maximum (1)
            0x75, 0x01,           // Report Size (1)
            0x95, 0x08,           // Report Count (8)
            0x81, 0x02,           // Input (Data, Variable, Absolute)
    
            0x95, 0x01,           // Report Count (1)
            0x75, 0x08,           // Report Size (8)
            0x81, 0x01,           // Input (Constant) reserved byte(1)
    
            0x95, 0x05,           // Report Count (5)
            0x75, 0x01,           // Report Size (1)
            0x05, 0x08,           // Usage Page (Page# for LEDs)
            0x19, 0x01,           // Usage Minimum (1)
            0x29, 0x05,           // Usage Maximum (5)
            0x91, 0x02,           // Output (Data, Variable, Absolute), Led report
            0x95, 0x01,           // Report Count (1)
            0x75, 0x03,           // Report Size (3)
            0x91, 0x01,           // Output (Data, Variable, Absolute), Led report padding
    
            0x95, 0x06,           // Report Count (6)
            0x75, 0x08,           // Report Size (8)
            0x15, 0x00,           // Logical Minimum (0)
            0x25, 0x65,           // Logical Maximum (101)
            0x05, 0x07,           // Usage Page (Key codes)
            0x19, 0x00,           // Usage Minimum (0)
            0x29, 0x65,           // Usage Maximum (101)
            0x81, 0x00,           // Input (Data, Array) Key array(6 bytes)
    
            0x09, 0x05,           // Usage (Vendor Defined)
            0x15, 0x00,           // Logical Minimum (0)
            0x26, 0xFF, 0x00,     // Logical Maximum (255)
            0x75, 0x08,           // Report Size (8 bit)
            0x95, 0x02,           // Report Count (2)
            0xB1, 0x02,           // Feature (Data, Variable, Absolute)
    
            0xC0              // End Collection (Application)
    
        };
        //Key
        memset((void *)input_report_array, 0, sizeof(ble_hids_inp_rep_init_t));
        memset((void *)output_report_array, 0, sizeof(ble_hids_outp_rep_init_t));
        memset((void *)feature_report_array, 0, sizeof(ble_hids_feature_rep_init_t));
    
        // Initialize HID Service
        p_input_report                      = &input_report_array[INPUT_REP_BUTTONS_INDEX];
        p_input_report->max_len             = INPUT_REP_BUTTONS_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_BUTTONS_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_input_report                      = &input_report_array[INPUT_REP_MOVEMENT_INDEX];
        p_input_report->max_len             = INPUT_REP_MOVEMENT_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_MOVEMENT_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_input_report                      = &input_report_array[INPUT_REP_MPLAYER_INDEX];
        p_input_report->max_len             = INPUT_REP_MEDIA_PLAYER_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_MPLAYER_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        //Key
        p_input_report                      = &input_report_array[INPUT_REPORT_KEYS_INDEX];
        p_input_report->max_len             = INPUT_REPORT_KEYS_MAX_LEN;
        p_input_report->rep_ref.report_id   = INPUT_REP_REF_ID;
        p_input_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_INPUT;
    
        p_input_report->sec.cccd_wr = SEC_JUST_WORKS;
        p_input_report->sec.wr      = SEC_JUST_WORKS;
        p_input_report->sec.rd      = SEC_JUST_WORKS;
    
        p_output_report                      = &output_report_array[OUTPUT_REPORT_INDEX];
        p_output_report->max_len             = OUTPUT_REPORT_MAX_LEN;
        p_output_report->rep_ref.report_id   = OUTPUT_REP_REF_ID;
        p_output_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_OUTPUT;
    
        p_output_report->sec.wr = SEC_JUST_WORKS;
        p_output_report->sec.rd = SEC_JUST_WORKS;
    
        p_feature_report                      = &feature_report_array[FEATURE_REPORT_INDEX];
        p_feature_report->max_len             = FEATURE_REPORT_MAX_LEN;
        p_feature_report->rep_ref.report_id   = FEATURE_REP_REF_ID;
        p_feature_report->rep_ref.report_type = BLE_HIDS_REP_TYPE_FEATURE;
    
        p_feature_report->sec.rd              = SEC_JUST_WORKS;
        p_feature_report->sec.wr              = SEC_JUST_WORKS;
    
        hid_info_flags = HID_INFO_FLAG_REMOTE_WAKE_MSK | HID_INFO_FLAG_NORMALLY_CONNECTABLE_MSK;
    
        memset(&hids_init_obj, 0, sizeof(hids_init_obj));
    
        hids_init_obj.evt_handler                    = on_hids_evt;
        hids_init_obj.error_handler                  = service_error_handler;
        hids_init_obj.is_kb                          = true;
        hids_init_obj.is_mouse                       = true;
        hids_init_obj.inp_rep_count                  = INPUT_REPORT_COUNT;
        hids_init_obj.p_inp_rep_array                = input_report_array;
        hids_init_obj.outp_rep_count                 = 1;
        hids_init_obj.p_outp_rep_array               = output_report_array;
        hids_init_obj.feature_rep_count              = 1;
        hids_init_obj.p_feature_rep_array            = feature_report_array;
        hids_init_obj.rep_map.data_len               = sizeof(rep_map_data);
        hids_init_obj.rep_map.p_data                 = rep_map_data;
        hids_init_obj.hid_information.bcd_hid        = BASE_USB_HID_SPEC_VERSION;
        hids_init_obj.hid_information.b_country_code = 0;
        hids_init_obj.hid_information.flags          = hid_info_flags;
        hids_init_obj.included_services_count        = 0;
        hids_init_obj.p_included_services_array      = NULL;
    
        hids_init_obj.rep_map.rd_sec         = SEC_JUST_WORKS;
        hids_init_obj.hid_information.rd_sec = SEC_JUST_WORKS;
    
        //Key
        hids_init_obj.boot_kb_inp_rep_sec.cccd_wr = SEC_JUST_WORKS;
        hids_init_obj.boot_kb_inp_rep_sec.rd      = SEC_JUST_WORKS;
    
        hids_init_obj.boot_kb_outp_rep_sec.rd = SEC_JUST_WORKS;
        hids_init_obj.boot_kb_outp_rep_sec.wr = SEC_JUST_WORKS;
    
        hids_init_obj.boot_mouse_inp_rep_sec.cccd_wr = SEC_JUST_WORKS;
        hids_init_obj.boot_mouse_inp_rep_sec.wr      = SEC_JUST_WORKS;
        hids_init_obj.boot_mouse_inp_rep_sec.rd      = SEC_JUST_WORKS;
    
        hids_init_obj.protocol_mode_rd_sec = SEC_JUST_WORKS;
        hids_init_obj.protocol_mode_wr_sec = SEC_JUST_WORKS;
        hids_init_obj.ctrl_point_wr_sec    = SEC_JUST_WORKS;
    
        err_code = ble_hids_init(&m_hids, &hids_init_obj);
        APP_ERROR_CHECK(err_code);
    }
    

Children
No Data
Related