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fds is not working in buttonless DFU

Hello All,

I am working on the nrf52810 ,

Using sdk 15.3 .

I am working on the DFU feature on my application.

I have successfully integrated the my application with the buttonless DFU and its working properly.

Now I have added the fds feature to that but its not woking.

if i use fds in my application without buttonless DFU its working properly, but if i integrate fds with dfu its not working.

I have followed some post but not getting main cause.

If anyone know this issue how to solve please let me know .

What modification is required ?

Please check my file below. 

/**
 * Copyright (c) 2014 - 2019, 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.
 *
 */
/** @example examples/ble_peripheral/ble_app_buttonless_dfu
 *
 * @brief Secure DFU Buttonless Service Application main file.
 *
 * This file contains the source code for a sample application using the proprietary
 * Secure DFU Buttonless Service. This is a template application that can be modified
 * to your needs. To extend the functionality of this application, please find
 * locations where the comment "// YOUR_JOB:" is present and read the comments.
 */

#include <stdbool.h>
#include <stdint.h>
#include <string.h>

#include "nrf_dfu_ble_svci_bond_sharing.h"
#include "nrf_svci_async_function.h"
#include "nrf_svci_async_handler.h"

#include "ble_cus.h"

#include "nordic_common.h"
#include "nrf.h"
#include "app_error.h"
#include "ble.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "app_timer.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"
#include "bsp_btn_ble.h"
#include "ble_hci.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_state.h"
#include "ble_dfu.h"
#include "ble_tps.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "fds.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_drv_clock.h"
#include "nrf_power.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_bootloader_info.h"
#include "boards.h"

#include "app_button.h"

#include "bsp.h"
#include "ble_gap.h"


/***  Used for testing FDS ***/
static volatile uint8_t write_flag_fds_test = 0; 
#define FILE_ID_FDS_TEST     0x1111
#define REC_KEY_FDS_TEST     0x2222
/*****************************/


#define DEVICE_NAME                     "NRF_02"  //Nordic_Buttonless                       /**< Name of device. Will be included in the advertising data. */
#define DEVICE_NAME_P                   "Nrf02"  /**< Name of device. Will be included in the advertising data. */

//#define DEVICE_NAME                     "FIND02"  //Nordic_Buttonless                       /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME_P                   "FinD02"  /**< Name of device. Will be included in the advertising data. */

#define MANUFACTURER_NAME               "NordicSemiconductor"                       /**< Manufacturer. Will be passed to Device Information Service. */
#define APP_ADV_INTERVAL                80                                         /**< The advertising interval (in units of 0.625 ms. This value corresponds to 187.5 ms). */
#define APP_ADV_DURATION                BLE_GAP_ADV_TIMEOUT_GENERAL_UNLIMITED      /**< The advertising duration (180 seconds) in units of 10 milliseconds. */

#define ADVERTISING_LED                 BSP_BOARD_LED_3                         /**< Is on when device is advertising. */

#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 MIN_CONN_INTERVAL               MSEC_TO_UNITS(100, UNIT_1_25_MS)            /**< Minimum acceptable connection interval (0.1 seconds). */
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(200, UNIT_1_25_MS)            /**< Maximum acceptable connection interval (0.2 second). */
#define SLAVE_LATENCY                   0                                           /**< Slave latency. */
#define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(4000, UNIT_10_MS)             /**< Connection supervisory timeout (4 seconds). */

#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 TX_POWER_LEVEL                  (4)                                    /**< TX Power Level value. This will be set both in the TX Power service, in the advertising data, and also used to set the radio transmit power. */


#define BUTTON_DETECTION_DELAY          APP_TIMER_TICKS(50) 

#define Single_click_INTERVAL           APP_TIMER_TICKS(1000)
#define NOTIFICATION_INTERVAL           APP_TIMER_TICKS(1000)     


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

BLE_TPS_DEF(m_tps);
NRF_BLE_GATT_DEF(m_gatt);                                                           /**< GATT module instance. */
BLE_CUS_DEF(m_cus);
//NRF_BLE_QWR_DEF(m_qwr);                                                             /**< Context for the Queued Write module.*/

BLE_ADVERTISING_DEF(m_advertising);                                                 /**< Advertising module instance. */


APP_TIMER_DEF(long_button_action);
APP_TIMER_DEF(single_button_action);
APP_TIMER_DEF(Double_button_action);
APP_TIMER_DEF(m_notification_timer_id);

int custom_entry_flag;
static uint8_t m_custom_value = 0;
static uint8_t DEVICE_NAME_MED[7]       = {"FIND00"};

static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID;                            /**< Handle of the current connection. */
//static void advertising_start(bool erase_bonds);                                    /**< Forward declaration of advertising start function */

static uint32_t cnt = 0, temp = 0, advertising_flag = 0;
static uint8_t press_cnt = 0, temp_click = 0;
static uint8_t temp_name_id_lsb;

extern int temp_name_id;
extern int TX_power_variable;
extern int custom_entry_flag;

uint8_t m_deadbeef[] = {54};//,12};//{8,45,69,44,22,45,12,32};
uint8_t *temp_data;

static uint8_t m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET;                   /**< Advertising handle used to identify an advertising set. */
static uint8_t m_enc_advdata[BLE_GAP_ADV_SET_DATA_SIZE_MAX];                    /**< Buffer for storing an encoded advertising set. */
static uint8_t m_enc_scan_response_data[BLE_GAP_ADV_SET_DATA_SIZE_MAX];         /**< Buffer for storing an encoded scan data. */

/**@brief Struct that contains pointers to the encoded advertising data. */
static ble_gap_adv_data_t m_adv_data =
{
    .adv_data =
    {
        .p_data = m_enc_advdata,
        .len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX
    },
    .scan_rsp_data =
    {
        .p_data = m_enc_scan_response_data,
        .len    = BLE_GAP_ADV_SET_DATA_SIZE_MAX

    }
};

ble_advdata_t advdata;
ble_gap_adv_params_t adv_params;




/*--------------all function decleration --------*/
static void setDeviceName(uint8_t status);
static void tx_power_set(void);
static void bsp_event_handler(bsp_event_t event);
//static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context);
/*----     flash read/write/delete function  ----*/

static ret_code_t fds_test_find_and_delete (void);
static ret_code_t fds_test_init (void);
static ret_code_t fds_read(void);
static ret_code_t fds_test_write(void);
static void my_fds_evt_handler(fds_evt_t const * const p_fds_evt);


/*------- FOR THE UPDATE ADVERTISING VARIABLE FOR SWITCH CASE ------ */
  enum 
  { 
    STATUS_LOW,
    STATUS_MED,
    STATUS_HIGH,
    STATUS_ERR
  };
/*-------------------------------------------------------------------*/

// YOUR_JOB: Use UUIDs for service(s) used in your application.
static ble_uuid_t m_adv_uuids[] = {{BLE_UUID_DEVICE_INFORMATION_SERVICE, BLE_UUID_TYPE_BLE},
                                   {BLE_UUID_TX_POWER_SERVICE, BLE_UUID_TYPE_BLE}
                                  };



/**@brief Function for initializing the TX Power Service.
 */
static void tps_init(void)
{
    ret_code_t     err_code;
    ble_tps_init_t tps_init_obj;

    memset(&tps_init_obj, 0, sizeof(tps_init_obj));
    tps_init_obj.initial_tx_power_level = TX_POWER_LEVEL;

    tps_init_obj.tpl_rd_sec = SEC_JUST_WORKS;

    err_code = ble_tps_init(&m_tps, &tps_init_obj);
    APP_ERROR_CHECK(err_code);
}

/**@brief Handler for shutdown preparation.
 *
 * @details During shutdown procedures, this function will be called at a 1 second interval
 *          untill the function returns true. When the function returns true, it means that the
 *          app is ready to reset to DFU mode.
 *
 * @param[in]   event   Power manager event.
 *
 * @retval  True if shutdown is allowed by this power manager handler, otherwise false.
 */
static bool app_shutdown_handler(nrf_pwr_mgmt_evt_t event)
{
    switch (event)
    {
        case NRF_PWR_MGMT_EVT_PREPARE_DFU:
            NRF_LOG_INFO("Power management wants to reset to DFU mode.");
            // YOUR_JOB: Get ready to reset into DFU mode
            //
            // If you aren't finished with any ongoing tasks, return "false" to
            // signal to the system that reset is impossible at this stage.
            //
            // Here is an example using a variable to delay resetting the device.
            //
            // if (!m_ready_for_reset)
            // {
            //      return false;
            // }
            // else
            //{
            //
            //    // Device ready to enter
            //    uint32_t err_code;
            //    err_code = sd_softdevice_disable();
            //    APP_ERROR_CHECK(err_code);
            //    err_code = app_timer_stop_all();
            //    APP_ERROR_CHECK(err_code);
            //}
            break;

        default:
            // YOUR_JOB: Implement any of the other events available from the power management module:
            //      -NRF_PWR_MGMT_EVT_PREPARE_SYSOFF
            //      -NRF_PWR_MGMT_EVT_PREPARE_WAKEUP
            //      -NRF_PWR_MGMT_EVT_PREPARE_RESET
            return true;
    }

    NRF_LOG_INFO("Power management allowed to reset to DFU mode.");
    return true;
}

//lint -esym(528, m_app_shutdown_handler)
/**@brief Register application shutdown handler with priority 0.
 */
NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0);


static void buttonless_dfu_sdh_state_observer(nrf_sdh_state_evt_t state, void * p_context)
{
    if (state == NRF_SDH_EVT_STATE_DISABLED)
    {
        // Softdevice was disabled before going into reset. Inform bootloader to skip CRC on next boot.
        nrf_power_gpregret2_set(BOOTLOADER_DFU_SKIP_CRC);

        //Go to system off.
        nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
    }
}

/* nrf_sdh state observer. */
NRF_SDH_STATE_OBSERVER(m_buttonless_dfu_state_obs, 0) =
{
    .handler = buttonless_dfu_sdh_state_observer,
};


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_INTERVAL;
    p_config->ble_adv_fast_timeout  = APP_ADV_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);
    }
    
}



// YOUR_JOB: Update this code if you want to do anything given a DFU event (optional).
/**@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 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 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);
}


/**@brief Function for the Timer initialization.
 *
 * @details Initializes the timer module. This creates and starts application timers.
 */
static void timers_init(void)
{

    // Initialize timer module.
    uint32_t err_code = app_timer_init();
    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)
{
    uint32_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);

//    if (advertising_flag == 1)                                              //for normal advert
//    {
//        advertising_flag = 0;
//        err_code = sd_ble_gap_device_name_set(&sec_mode,
//                                              (const uint8_t *)DEVICE_NAME,
//                                              strlen(DEVICE_NAME));
//        APP_ERROR_CHECK(err_code);
//    }
//    else if (advertising_flag == 2)                                              //for panic advert
//    {
//        advertising_flag = 0;
//        err_code = sd_ble_gap_device_name_set(&sec_mode,
//                                              (const uint8_t *)DEVICE_NAME_P,
//                                              strlen(DEVICE_NAME_P));
//        APP_ERROR_CHECK(err_code);
//    }

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

    /* YOUR_JOB: Use an appearance value matching the application's use case.
       err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_);
       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 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 handling the YYY Service events.
 * YOUR_JOB implement a service handler function depending on the event the service you are using can generate
 *
 * @details This function will be called for all YY Service events which are passed to
 *          the application.
 *
 * @param[in]   p_yy_service   YY Service structure.
 * @param[in]   p_evt          Event received from the YY Service.
 *
 *
   static void on_yys_evt(ble_yy_service_t     * p_yy_service,
                          ble_yy_service_evt_t * p_evt)
   {
    switch (p_evt->evt_type)
    {
        case BLE_YY_NAME_EVT_WRITE:
            APPL_LOG("[APPL]: charact written with value %s. ", p_evt->params.char_xx.value.p_str);
            break;

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

/**@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 notification_timeout_handler(void * p_context)
{
    UNUSED_PARAMETER(p_context);
    ret_code_t err_code;
    
    // Increment the value of m_custom_value before nortifing it.
    m_custom_value++;
    
    err_code = ble_cus_custom_value_update(&m_cus, m_custom_value);
    APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling the Custom Service Service events.
 *
 * @details This function will be called for all Custom Service events which are passed to
 *          the application.
 *
 * @param[in]   p_cus_service  Custom Service structure.
 * @param[in]   p_evt          Event received from the Custom Service.
 *
 */
static void on_cus_evt(ble_cus_t     * p_cus_service,
                       ble_cus_evt_t * p_evt)
{
    ret_code_t err_code;
    
    switch(p_evt->evt_type)
    {
        case BLE_CUS_EVT_NOTIFICATION_ENABLED:
             
             err_code = app_timer_start(m_notification_timer_id, NOTIFICATION_INTERVAL, NULL);
             APP_ERROR_CHECK(err_code);
             break;

        case BLE_CUS_EVT_NOTIFICATION_DISABLED:
            // Stop the application timer that is triggering the notifications
            err_code = app_timer_stop(m_notification_timer_id);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_CUS_EVT_CONNECTED:
            break;

        case BLE_CUS_EVT_DISCONNECTED:
            break;
        case BLE_CUS_EVT_SERVO_CTR_VALUE_RECEIVED:
            break;    

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

/**@brief Function for initializing services that will be used by the application.
 */
static void cus_init(void)
{
            /* YOUR_JOB: Add code to initialize the services used by the application.*/
        ret_code_t                         err_code;
        ble_cus_init_t                     cus_init;

         // Initialize CUS Service init structure to zero.
        memset(&cus_init, 0, sizeof(cus_init));
        cus_init.evt_handler                = on_cus_evt;
    
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cus_init.custom_value_char_attr_md.cccd_write_perm);
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cus_init.custom_value_char_attr_md.read_perm);
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cus_init.custom_value_char_attr_md.write_perm);
    
        err_code = ble_cus_init(&m_cus, &cus_init);
        APP_ERROR_CHECK(err_code);	
}

/**@brief Function for initializing services that will be used by the application.
 */
static void services_init(void)
{
    uint32_t                  err_code;
    //nrf_ble_qwr_init_t        qwr_init  = {0};
    ble_dfu_buttonless_init_t dfus_init = {0};

    // Initialize Queued Write Module.
//    qwr_init.error_handler = nrf_qwr_error_handler;

//    err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
//    APP_ERROR_CHECK(err_code);

    dfus_init.evt_handler = ble_dfu_evt_handler;

    err_code = ble_dfu_buttonless_init(&dfus_init);
    APP_ERROR_CHECK(err_code);
    
    tps_init();
    cus_init();
}




/**@brief Function for handling the Connection Parameters Module.
 *
 * @details This function will be called for all events in the Connection Parameters Module which
 *          are passed to the application.
 *          @note All this function does is to disconnect. This could have been done by simply
 *                setting the disconnect_on_fail config parameter, but instead we use the event
 *                handler mechanism to demonstrate its use.
 *
 * @param[in] p_evt  Event received from the Connection Parameters Module.
 */
static void on_conn_params_evt(ble_conn_params_evt_t * p_evt)
{
    uint32_t err_code;

    if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED)
    {
        err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
        APP_ERROR_CHECK(err_code);
        
    }
}


/**@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)
{
    uint32_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                    = on_conn_params_evt;
    cp_init.error_handler                  = conn_params_error_handler;

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


/**@brief Function for putting the chip into sleep mode.
 *
 * @note This function will not return.
 */
static void sleep_mode_enter(void)
{
    uint32_t 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);

    //Disable SoftDevice. It is required to be able to write to GPREGRET2 register (SoftDevice API blocks it).
    //GPREGRET2 register holds the information about skipping CRC check on next boot.
    err_code = nrf_sdh_disable_request();
    APP_ERROR_CHECK(err_code);
}


/**@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)
{
    uint32_t err_code;

    switch (ble_adv_evt)
    {
        case BLE_ADV_EVT_FAST:
            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_ADV_EVT_IDLE:
            sleep_mode_enter();
            break;

        default:
            break;
    }
}

static void advertising_init(void)
{
    ret_code_t    err_code;
    //ble_advdata_t advdata;
    //ble_advdata_t srdata;

    //ble_uuid_t adv_uuids[] = {{LBS_UUID_SERVICE, m_lbs.uuid_type}};

    // Build and set advertising data.
    memset(&advdata, 0, sizeof(advdata));

    advdata.name_type          = BLE_ADVDATA_FULL_NAME;
 //   advdata.short_name_len     = 8;
//    advdata.include_appearance = true;                                  // changed to true to false
//    advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
    
//    advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
//    advdata.uuids_complete.p_uuids  = m_adv_uuids;

//    memset(&srdata, 0, sizeof(srdata));
//    srdata.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
//    srdata.uuids_complete.p_uuids  = adv_uuids;

    err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
    APP_ERROR_CHECK(err_code);

//    err_code = ble_advdata_encode(&srdata, m_adv_data.scan_rsp_data.p_data, &m_adv_data.scan_rsp_data.len);
//    APP_ERROR_CHECK(err_code);

    //ble_gap_adv_params_t adv_params;

    // Set advertising parameters.
    memset(&adv_params, 0, sizeof(adv_params));

    adv_params.primary_phy     = BLE_GAP_PHY_1MBPS;
    adv_params.duration        = APP_ADV_DURATION;
    adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
    adv_params.p_peer_addr     = NULL;
    adv_params.filter_policy   = BLE_GAP_ADV_FP_ANY;
    adv_params.interval        = APP_ADV_INTERVAL;

    err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &adv_params);
    APP_ERROR_CHECK(err_code);
}

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

    err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG);
    APP_ERROR_CHECK(err_code);
}

/**@brief Function for stopping advertising.
 */
static void advertising_stop(void)
{
    ret_code_t           err_code;

    err_code = sd_ble_gap_adv_stop(m_adv_handle);
    APP_ERROR_CHECK(err_code);
}
/**@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)
{
    uint32_t err_code = NRF_SUCCESS;

    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_DISCONNECTED:
            // LED indication will be changed when advertising starts.
            //bsp_board_led_off(ADVERTISING_LED);
//            bsp_board_init(BSP_INIT_LEDS);
//            bsp_board_led_off(ADVERTISING_LED);

            
            //advertising_flag = 1;

//            gap_params_init();
//            advertising_init();
//            advertising_start();                  //start normal advertising
             //setDeviceName(STATUS_MED);
            
            if(custom_entry_flag == 1)
            {
                     NRF_LOG_INFO("temp_name_id = %x\r\n", temp_name_id);
        
              // m_deadbeef[0] = temp_name_id;
              //NRF_LOG_INFO("m_deadbeef = %x\r\n", m_deadbeef[0]);

                err_code =fds_test_init();
                APP_ERROR_CHECK(err_code);
                err_code = fds_test_find_and_delete();
                APP_ERROR_CHECK(err_code);

                m_deadbeef[0] = temp_name_id;

                NRF_LOG_INFO("m_deadbeef = %x\r\n", m_deadbeef[0]);

                err_code =fds_test_write();
                APP_ERROR_CHECK(err_code);

            
                //while (write_flag_fds_test==1);
                err_code = fds_read();
                APP_ERROR_CHECK(err_code);

                temp_name_id_lsb = temp_name_id;
                temp_name_id = temp_name_id/10;
                NRF_LOG_INFO("temp_name_id = %d\r\n", temp_name_id);
                temp_name_id_lsb = temp_name_id_lsb%10;
                NRF_LOG_INFO("temp_name_id_lsb = %d\r\n", temp_name_id_lsb);

                //  gap_params_init();
                //  advertising_init();
                //   advertising_start();

                custom_entry_flag = 2;
                setDeviceName(STATUS_MED);
            }
                           
            if(custom_entry_flag != 2) //default advt
            {
              err_code =fds_test_init();
              APP_ERROR_CHECK(err_code);
              //while (write_flag_fds_test==1);
              err_code = fds_read();
              APP_ERROR_CHECK(err_code);

              

              temp_name_id_lsb = temp_name_id;
              temp_name_id = temp_name_id/10;
              NRF_LOG_INFO("temp_name_id = %d\r\n", temp_name_id);
              temp_name_id_lsb = temp_name_id_lsb%10;
              NRF_LOG_INFO("temp_name_id_lsb = %d\r\n", temp_name_id_lsb);
//              gap_params_init();
//              advertising_init();
//              advertising_start();
              setDeviceName(STATUS_MED);
            
            }

            break;

        case BLE_GAP_EVT_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);

//            bsp_board_init(BSP_INIT_LEDS);
//            bsp_board_led_on(ADVERTISING_LED);

            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_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);

    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()
{
    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 handling events from the BSP module.
 *
 * @param[in]   event   Event generated when button is pressed.
 */
static void bsp_event_handler(bsp_event_t event)
{
    uint32_t err_code;

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

        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; // BSP_EVENT_DISCONNECT

        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; // BSP_EVENT_KEY_0

        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)
{
    uint32_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 the Power manager.
 */
static void log_init(void)
{
    uint32_t err_code = NRF_LOG_INIT(NULL);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEFAULT_BACKENDS_INIT();
}


/**@brief   Function for initializing the GATT module.
 * @details The GATT module handles ATT_MTU and Data Length update procedures automatically.
 */
static void gatt_init(void)
{
    ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
    APP_ERROR_CHECK(err_code);
}




static void power_management_init(void)
{
    uint32_t err_code = nrf_pwr_mgmt_init();
    APP_ERROR_CHECK(err_code);
}


/////////////////////////////////////*********************************************************

#if USE_BSP == 0

#define PIN_0 0

APP_TIMER_DEF(m_button_action);

#define BUTTON_STATE_POLL_INTERVAL_MS  10UL

#define LONG_PRESS(MS)    (uint32_t)(MS)/BUTTON_STATE_POLL_INTERVAL_MS 
 

/**********************************************************************************************/

/**@brief Function for handling events from the button handler module.
 *
 .
 * @param[in] p_context   Unused.
 */
void single_click_timeout_handler(void * p_context)
{
      uint32_t err_code;

      if(press_cnt  ==  2)
      {
        NRF_LOG_INFO("double Button press"); 
        
        press_cnt=0;
              
        /***************************/
        err_code = sd_ble_gap_adv_stop(m_adv_handle);     //stop advertising
        APP_ERROR_CHECK(err_code);
//        advertising_stop();

        advertising_flag = 2;

          err_code = fds_read();
          APP_ERROR_CHECK(err_code);

          /********************************----------SORTING ID IN BITS-------------*************************************/
            
          temp_name_id_lsb = temp_name_id;
          temp_name_id = temp_name_id/10;
          NRF_LOG_INFO("temp_name_id = %d\r\n", temp_name_id);
          temp_name_id_lsb = temp_name_id_lsb%10;
          NRF_LOG_INFO("temp_name_id_lsb = %d\r\n", temp_name_id_lsb);

//        gap_params_init();
//        advertising_init();
//
//        advertising_start();                  //panic normal advertising
        setDeviceName(STATUS_MED);
        /***************************/
      }
      else
      {
        press_cnt = 0;
        if( temp_click == 0)
        {          
          temp_click = 1;
          NRF_LOG_INFO("single button press");

          app_timer_stop(single_button_action);
          APP_ERROR_CHECK(err_code);

          /***************************/
          advertising_flag = 1;
          
          err_code = fds_read();
          APP_ERROR_CHECK(err_code);

          /********************************----------SORTING ID IN BITS-------------*************************************/
            
          temp_name_id_lsb = temp_name_id;
          temp_name_id = temp_name_id/10;
          NRF_LOG_INFO("temp_name_id = %d\r\n", temp_name_id);
          temp_name_id_lsb = temp_name_id_lsb%10;
          NRF_LOG_INFO("temp_name_id_lsb = %d\r\n", temp_name_id_lsb);
//          gap_params_init();
//          advertising_init();
//
//          advertising_start();                  //start normal advertising
          setDeviceName(STATUS_MED);
          //tx_power_set();
          /***************************/
        }
      }

      
      return;
}

/**********************************************************************************************/

/**@brief Function for the button handler module.
 *
 .
 * @param[in] p_context   Unused.
 */
void button_press_timeout_handler(void * p_context)
{ 
     uint32_t err_code;
     static uint32_t cnt;


     if (app_button_is_pushed(0))
     {
         cnt++;
         if ( cnt >= LONG_PRESS(2000))
         {
             cnt = 0;
             temp_click = 0;

             NRF_LOG_INFO("Long Button press");

             err_code = sd_ble_gap_adv_stop(m_adv_handle);     //stop advertising
             APP_ERROR_CHECK(err_code);

//             advertising_stop();
         }
         else
         {
            err_code = app_timer_start(long_button_action, 
                                       APP_TIMER_TICKS(BUTTON_STATE_POLL_INTERVAL_MS),
                                       NULL);
            APP_ERROR_CHECK(err_code);
         }
     }
     else
     {
          cnt = 0 ;
          press_cnt++;
          if(press_cnt==1)
          {
            err_code = app_timer_start(single_button_action, 
                                   Single_click_INTERVAL,
                                   NULL);
            APP_ERROR_CHECK(err_code);
          }

     }
     
    return;
}

/*void button_timeout_handler(void * p_context)
{ 
     uint32_t err_code;
     static uint32_t cnt = 0, flag = 0,temp=0;

     if ((app_button_is_pushed(0)))
     {
         cnt++;
         if ( (cnt >= LONG_PRESS(2000)) && (flag == 1 ))
         {
             cnt = 0;
             flag = 2;

             NRF_LOG_INFO("Long Button press");
             NRF_LOG_INFO("stop advertising...");

             err_code = sd_ble_gap_adv_stop(m_adv_handle);     //stop advertising
             //uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_IDLE);   //stop****************
             APP_ERROR_CHECK(err_code);
             
             return;
         }
         else
         {
              err_code = app_timer_start(m_button_action, 
                                         APP_TIMER_TICKS(BUTTON_STATE_POLL_INTERVAL_MS),
                                         NULL);
              APP_ERROR_CHECK(err_code);
         }
     }
     else if((flag == 2 && temp == 1) ||  temp == 0 )
     {

          cnt = 0;                         // reset counter variable
          flag = 1;
          temp = 1;

          NRF_LOG_INFO("Short button press");
          NRF_LOG_INFO("advertising.......");

          gap_params_init();
          advertising_init();

          advertising_start();            //start advertising
          return;
     }

}*/

void button_callback(uint8_t pin_no, uint8_t button_action)
{
      uint32_t err_code;

      
      if ((pin_no == BUTTON_1) && (button_action == APP_BUTTON_PUSH))
      {
          err_code = app_timer_start(long_button_action, 
                                     APP_TIMER_TICKS(BUTTON_STATE_POLL_INTERVAL_MS),
                                     NULL);
          APP_ERROR_CHECK(err_code);
      }
}
/**@brief Function for initializing the button handler module.
 */
static void buttons_init(void)
{

      uint32_t err_code;
      
      static app_button_cfg_t  button_cfg;

      button_cfg.pin_no         = BUTTON_1;
      button_cfg.button_handler = button_callback;
      button_cfg.pull_cfg       = NRF_GPIO_PIN_PULLUP;
      button_cfg.active_state   = APP_BUTTON_ACTIVE_LOW;
      
      err_code = app_button_init(&button_cfg, 1, 100);
      APP_ERROR_CHECK(err_code);
      
      err_code = app_button_enable();
      APP_ERROR_CHECK(err_code);

      /*Enable an app timer instance to detect long button press*/

      err_code = app_timer_create(&long_button_action, APP_TIMER_MODE_SINGLE_SHOT, button_press_timeout_handler);
      APP_ERROR_CHECK(err_code);

      err_code = app_timer_create(&single_button_action, APP_TIMER_MODE_SINGLE_SHOT, single_click_timeout_handler);
      APP_ERROR_CHECK(err_code);
}
#endif //USE_BSP


//*********************************************************************************************////////////////////////////////////////////


/**@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)
{
    if (NRF_LOG_PROCESS() == false)
    {
        nrf_pwr_mgmt_run();
    }
}


/**@brief Function for changing the tx power.
 */
static void tx_power_set(void)
{
    ret_code_t err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, TX_POWER_LEVEL);
    APP_ERROR_CHECK(err_code);
    ble_tps_tx_power_level_set(&m_tps, TX_POWER_LEVEL);
}

#define DEVICE_NAME_LOW "123"
//uint8_t DEVICE_NAME_MED[7]= {"FIND_00"};//{0x65,'i','n','d','_','1','1'};
#define DEVICE_NAME_HIGH "789"
#define DEVICE_NAME_ERR "987"



static void setDeviceName(uint8_t status)
{
    ble_gap_conn_sec_mode_t sec_mode;
    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
    

    if( advertising_flag == 1)
    {
      DEVICE_NAME_MED[2]= 0x4E;
     // setDeviceName(STATUS_MED);
    }
    else if (advertising_flag == 2)
    {
      DEVICE_NAME_MED[2]= 0x6E;
     // setDeviceName(STATUS_MED);
    }

    DEVICE_NAME_MED[4]=0x30 + temp_name_id;
    DEVICE_NAME_MED[5]=0x30 + temp_name_id_lsb;

    // Set the device name
    switch(status)
    {
        case STATUS_LOW:
            sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME_LOW, strlen(DEVICE_NAME_LOW));
            bsp_board_led_on(BSP_BOARD_LED_1);
            break;
        case STATUS_MED:
            sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME_MED, 7);
            bsp_board_led_on(BSP_BOARD_LED_3);
            break;
        case STATUS_HIGH:
            sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME_HIGH, strlen(DEVICE_NAME_HIGH));
            bsp_board_led_on(BSP_BOARD_LED_2);
            break;
        case STATUS_ERR:
            sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME_ERR, strlen(DEVICE_NAME_ERR));
            bsp_board_led_on(BSP_BOARD_LED_0);
            break;   
    }

    // Encode the advertising packet and start advertising
    ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
    sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &adv_params);
    sd_ble_gap_adv_stop(m_adv_handle);
    sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG);
}


/****************************************---------------Flash read write function-------------------******************************************************/


static void my_fds_evt_handler(fds_evt_t const * const p_fds_evt)
{
    switch (p_fds_evt->id)
    {
        case FDS_EVT_INIT:
            if (p_fds_evt->result != FDS_SUCCESS)
            {
                // Initialization failed.
            }
            break;
				case FDS_EVT_WRITE:
						if (p_fds_evt->result == FDS_SUCCESS)
						{
							write_flag_fds_test=1;
						}
						break;
        default:
            break;
    }
}
static ret_code_t fds_test_write(void)
{
		
		//static uint32_t const m_deadbeef[2] = {0xDEADBEEF,0xBAADF00D};
//		static uint8_t const m_deadbeef[8] = {0x00,0xA2,0xA3,0xA4,0x22,45,12,32};
		fds_record_t        record;
		fds_record_desc_t   record_desc;

		// Set up data.
		

//for (int x = 0; x<8;x++)
//{
  //m_deadbeef[0] = array_update[2];
//}



		// Set up record.
		record.file_id              = FILE_ID_FDS_TEST;
		record.key                  = REC_KEY_FDS_TEST;

      temp_data = m_deadbeef[0];

		record.data.p_data       = &temp_data;
		//record.data.length_words   = sizeof(m_deadbeef)/sizeof(uint32_t);
		record.data.length_words   = sizeof(m_deadbeef)/sizeof(uint8_t);
				
                                record_desc.record_id =1;
		ret_code_t ret = fds_record_write(&record_desc, &record);
		if (ret != FDS_SUCCESS)
		{
				return ret;
		}
		 NRF_LOG_INFO("Writing Record ID = %d \r\n",record_desc.record_id);
		return NRF_SUCCESS;
}

static ret_code_t fds_read(void)
{

bsp_board_init(BSP_INIT_LEDS);
bsp_board_led_on(ADVERTISING_LED);


		fds_flash_record_t  flash_record;
		fds_record_desc_t   record_desc;
		fds_find_token_t    ftok ={0};//Important, make sure you zero init the ftok token
		//uint32_t *data;
		uint8_t *data;
		uint32_t err_code;
                uint8_t i=0;
		
		NRF_LOG_INFO("Start searching... \r\n");
		// Loop until all records with the given key and file ID have been found.
		//while (fds_record_find(FILE_ID_FDS_TEST, REC_KEY_FDS_TEST, &record_desc, &ftok) == FDS_SUCCESS)
                while (fds_record_find_in_file(FILE_ID_FDS_TEST, &record_desc, &ftok) == FDS_SUCCESS)
		{
				err_code = fds_record_open(&record_desc, &flash_record);
				if ( err_code != FDS_SUCCESS)
				{
					return err_code;		
				}
				
				NRF_LOG_INFO("Found Record ID = %d\r\n",record_desc.record_id);
				NRF_LOG_INFO("Data = ");
				//data = (uint32_t *) flash_record.p_data;
				data = (uint8_t *) flash_record.p_data;
				for (uint8_t i=0;i<flash_record.p_header->length_words;i++)
				{
					NRF_LOG_INFO("%d ",(data[i]));
				}
				NRF_LOG_INFO("\r\n");
                                NRF_LOG_INFO("%d ",(data[i]));
                                temp_name_id = data[0];
//                                data[2]= 45;
//                                NRF_LOG_INFO("0x%8x ",data[2]);
//                                NRF_LOG_INFO("0x%8x ",data[3]);
//                                if(record_desc.record_id == 1)
//                                {
//                                  for (uint8_t i=0;i<flash_record.p_header->length_words;i++)
//                                  {
//                                        NRF_LOG_INFO("%x",data[i]);
//                                  }
//                                  //NRF_LOG_INFO("0x%8x ",data[2]);
//                                }
                                //fds_record_find_in_file()
				// Access the record through the flash_record structure.
				// Close the record when done.
				err_code = fds_record_close(&record_desc);
				if (err_code != FDS_SUCCESS)
				{
					return err_code;	
				}
		}
		return NRF_SUCCESS;
		
}

static ret_code_t fds_test_find_and_delete (void)
{

		fds_record_desc_t   record_desc;
		fds_find_token_t    ftok;
	
		ftok.page=0;
		ftok.p_addr=NULL;
		// Loop and find records with same ID and rec key and mark them as deleted. 
		while (fds_record_find(FILE_ID_FDS_TEST, REC_KEY_FDS_TEST, &record_desc, &ftok) == FDS_SUCCESS)
		{
			fds_record_delete(&record_desc);
			NRF_LOG_INFO("Deleted record ID: %d \r\n",record_desc.record_id);
		}
		// call the garbage collector to empty them, don't need to do this all the time, this is just for demonstration
		ret_code_t ret = fds_gc();
		if (ret != FDS_SUCCESS)
		{
				return ret;
		}
		return NRF_SUCCESS;
}

static ret_code_t fds_test_init (void)
{
	
		ret_code_t ret = fds_register(my_fds_evt_handler);
		if (ret != FDS_SUCCESS)
		{
					return ret;
				
		}
		ret = fds_init();
		if (ret != FDS_SUCCESS)
		{
				return ret;
		}
		
		return NRF_SUCCESS;
		
}




/****************************************----------------------------------******************************************************/


/**@brief Function for application main entry.
 */
int main(void)
{
    bool       erase_bonds;
    ret_code_t err_code;

    log_init();
    //bsp_board_init(BSP_INIT_LEDS);
    
    timers_init();
//    power_management_init();

#if USE_BSP == 0
    buttons_init();
#else
    buttons_leds_init(&erase_bonds);
#endif
    
    // 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);

    ble_stack_init();
    gap_params_init();
    gatt_init();
    advertising_init();
    services_init();
    conn_params_init();
    peer_manager_init();
    //tx_power_set();
    //bsp_board_led_off(BSP_INIT_LEDS);


/***************************/
//          advertising_flag = 1;
//
////          gap_params_init();
////          advertising_init();
////
////          advertising_start();                  //start normal advertising
//          setDeviceName(STATUS_MED);

    NRF_LOG_INFO("Buttonless DFU Application started.");
    err_code =fds_test_init();
    APP_ERROR_CHECK(err_code);
    // Enter main loop.
    for (;;)
    {
       // idle_state_handle();
    }
}

/**
 * @}
 */

Waiting for your valuable response.

Regards,

Rohit

Parents
  • Hello,

    FDS is initialized by the peer manager so you should avoid initializing it twice. Also, all FDS users should be registered before FDS init. So , fds_test_init() should be called before pm_init(), and it should not call fds_init().

  • Thanks for your valuable and detail response.

    Thanks for clearing my issue.

    i have made changes as per your suggestion.

    now fds is working.

    Additionally I have modified nrf_dfu_type.h like below

    for the app data preservation as 4KB

    Is it correct way? to preserve data after dfu?

    Waiting for your response...

    Regards,

    Rohit

  • Rohit said:

    i have try that in debug mode it is working but if i generate the dfu zip file and load with mobile (OAD)

    Then it is not advertising ..after all change...

     Can you debug the app after DFU to see why it's not advertising? Maybe it ends up in the app error handler.

    Rohit said:
    so i should try with 0x2000?

     It must match the number of FDS pages you have. Check the FDS settings in sdk_config.h 

    Regards,

    Vidar

  • In sdk_config.h file i have (fds setting)

    // <e> FDS_ENABLED - fds - Flash data storage module
    //==========================================================
    #ifndef FDS_ENABLED
    #define FDS_ENABLED 1
    #endif
    // <h> Pages - Virtual page settings
    
    // <i> Configure the number of virtual pages to use and their size.
    //==========================================================
    // <o> FDS_VIRTUAL_PAGES - Number of virtual flash pages to use. 
    // <i> One of the virtual pages is reserved by the system for garbage collection.
    // <i> Therefore, the minimum is two virtual pages: one page to store data and one page to be used by the system for garbage collection.
    // <i> The total amount of flash memory that is used by FDS amounts to @ref FDS_VIRTUAL_PAGES * @ref FDS_VIRTUAL_PAGE_SIZE * 4 bytes.
    
    #ifndef FDS_VIRTUAL_PAGES
    #define FDS_VIRTUAL_PAGES 3
    #endif
    
    // <o> FDS_VIRTUAL_PAGE_SIZE  - The size of a virtual flash page.
     
    
    // <i> Expressed in number of 4-byte words.
    // <i> By default, a virtual page is the same size as a physical page.
    // <i> The size of a virtual page must be a multiple of the size of a physical page.
    // <1024=> 1024 
    // <2048=> 2048 
    
    #ifndef FDS_VIRTUAL_PAGE_SIZE
    #define FDS_VIRTUAL_PAGE_SIZE 1024
    #endif
    
    // <o> FDS_VIRTUAL_PAGES_RESERVED - The number of virtual flash pages that are used by other modules. 
    // <i> FDS module stores its data in the last pages of the flash memory.
    // <i> By setting this value, you can move flash end address used by the FDS.
    // <i> As a result the reserved space can be used by other modules.
    
    #ifndef FDS_VIRTUAL_PAGES_RESERVED
    #define FDS_VIRTUAL_PAGES_RESERVED 0
    #endif
    
    // </h> 
    //==========================================================
    
    // <h> Backend - Backend configuration
    
    // <i> Configure which nrf_fstorage backend is used by FDS to write to flash.
    //==========================================================
    // <o> FDS_BACKEND  - FDS flash backend.
     
    
    // <i> NRF_FSTORAGE_SD uses the nrf_fstorage_sd backend implementation using the SoftDevice API. Use this if you have a SoftDevice present.
    // <i> NRF_FSTORAGE_NVMC uses the nrf_fstorage_nvmc implementation. Use this setting if you don't use the SoftDevice.
    // <1=> NRF_FSTORAGE_NVMC 
    // <2=> NRF_FSTORAGE_SD 
    
    #ifndef FDS_BACKEND
    #define FDS_BACKEND 2
    #endif
    
    // </h> 
    //==========================================================
    
    // <h> Queue - Queue settings
    
    //==========================================================
    // <o> FDS_OP_QUEUE_SIZE - Size of the internal queue. 
    // <i> Increase this value if you frequently get synchronous FDS_ERR_NO_SPACE_IN_QUEUES errors.
    
    #ifndef FDS_OP_QUEUE_SIZE
    #define FDS_OP_QUEUE_SIZE 4
    #endif
    
    // </h> 
    //==========================================================
    
    // <h> CRC - CRC functionality
    
    //==========================================================
    // <e> FDS_CRC_CHECK_ON_READ - Enable CRC checks.
    
    // <i> Save a record's CRC when it is written to flash and check it when the record is opened.
    // <i> Records with an incorrect CRC can still be 'seen' by the user using FDS functions, but they cannot be opened.
    // <i> Additionally, they will not be garbage collected until they are deleted.
    //==========================================================
    #ifndef FDS_CRC_CHECK_ON_READ
    #define FDS_CRC_CHECK_ON_READ 0
    #endif
    // <o> FDS_CRC_CHECK_ON_WRITE  - Perform a CRC check on newly written records.
     
    
    // <i> Perform a CRC check on newly written records.
    // <i> This setting can be used to make sure that the record data was not altered while being written to flash.
    // <1=> Enabled 
    // <0=> Disabled 
    
    #ifndef FDS_CRC_CHECK_ON_WRITE
    #define FDS_CRC_CHECK_ON_WRITE 0
    #endif
    
    // </e>
    
    // </h> 
    //==========================================================
    
    // <h> Users - Number of users
    
    //==========================================================
    // <o> FDS_MAX_USERS - Maximum number of callbacks that can be registered. 
    #ifndef FDS_MAX_USERS
    #define FDS_MAX_USERS 4
    #endif
    
    // </h> 
    //==========================================================

    We have to see fds virtual page = 3 is there...
     and if i set DFU_APP_DATA_RESERVED = 0x2000 then

    in app debug window it is showing insufficient resource .

    fds virtual page =3 means we have to set 0x3000 or 0xc00?

    1kb is equivalent to what value(DFU_APP_DATA_RESERVED )?

    what modification is required ?

    please provide your input...

    Regards,

    Rohit

  • Hi Rohit, 

    You need to reserve 0x3000 bytes when you have 3 allocated 3 virtual FDS pages. But maybe you should reduce it to 2 pages since you are running out of flash. 

    Rohit said:
    app debug window it is showing insufficient resource .

     The error indicates that the new image is too big to fit into the 'Free' area between Softdevice end and app data region start, see Dual-bank and single-bank updates. Maybe you are using the pca10040e_ble_debug configuration of the bootloader?  It takes up more flash than the pca10040e_ble configuration.

    Regards,

    Vidar

  • Thanks for information

    Maybe you are using the pca10040e_ble_debug configuration of the bootloader?  It takes up more flash than the pca10040e_ble configuration.

    Okay..

    You need to reserve 0x3000 bytes when you have 3 allocated 3 virtual FDS pages. But maybe you should reduce it to 2 pages since you are running out of flash. 

    okay i will try this

    if i set 0x1000 then actually how many bytes it will store with setting fds virtual pages = 1 ?

    waiting for your response..

    Regards,

    Rohit

  • Hi Vidar,

    Thanks for suggestion. Its worked.

    In my side i have reduced some services used in the code and loaded the zip file through OAD.

    Now it is retrieving data that store previously.

    But if i wanted to make DFU again then it is not happening showing GATT error .

    How to solve this problem because previously without fds it working and multiple DFU is happening.

    How to solve this issue ? Is related to setting of app preserve data memory?.

    Waiting for your reply.

    Regards,

    Rohit

Reply
  • Hi Vidar,

    Thanks for suggestion. Its worked.

    In my side i have reduced some services used in the code and loaded the zip file through OAD.

    Now it is retrieving data that store previously.

    But if i wanted to make DFU again then it is not happening showing GATT error .

    How to solve this problem because previously without fds it working and multiple DFU is happening.

    How to solve this issue ? Is related to setting of app preserve data memory?.

    Waiting for your reply.

    Regards,

    Rohit

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