Code flashing successful but not working!

[siltvm]

Hello,

I am creating a new project that uses the nRF52810 as my controller, and during the development stage, I am using the PCA10040 nRF52832 development board. (I read somewhere that we can flash the nRF52810 code into the nRF52832 PCA10040 development board). My requirement is a simple LED indicator based on delay commands from an APK that uses the Nordic UART service to send and receive data. I added the timer peripheral to the ble_app_uart example project from the directory nRF5_SDK_17.0.2_d674dde\examples\ble_peripheral\ble_app_uart\pca10040e\s112\ses and flashed the code onto the PCA10040 nRF52832 development board to test it. The code works perfectly.

Then I took an nRF52810 custom PCB and connected the JTAG. The board is able to detect and erase the chip. When I flash the code onto the board, the IDE shows "flash successful," but the board is not working. Are there any other conditions for flashing the code into the nRF52810 custom board? Your response is valuable.

SDK version: 17.0.2
SEGGER Embedded Studio version: 5.42a

[billtsai]

Hi,

If your custom board do not have external 32K crystal, you can try to modify these parameters in sdk_config.h

// <o> NRF_SDH_CLOCK_LF_SRC  - SoftDevice clock source.
 
// <0=> NRF_CLOCK_LF_SRC_RC 
// <1=> NRF_CLOCK_LF_SRC_XTAL 
// <2=> NRF_CLOCK_LF_SRC_SYNTH 

#ifndef NRF_SDH_CLOCK_LF_SRC
#define NRF_SDH_CLOCK_LF_SRC 0
#endif

// <o> NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval. 
#ifndef NRF_SDH_CLOCK_LF_RC_CTIV
#define NRF_SDH_CLOCK_LF_RC_CTIV 16
#endif

// <o> NRF_SDH_CLOCK_LF_RC_TEMP_CTIV - SoftDevice calibration timer interval under constant temperature. 
// <i> How often (in number of calibration intervals) the RC oscillator shall be calibrated
// <i>  if the temperature has not changed.

#ifndef NRF_SDH_CLOCK_LF_RC_TEMP_CTIV
#define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2
#endif

// <o> NRF_SDH_CLOCK_LF_ACCURACY  - External clock accuracy used in the LL to compute timing.
 
// <0=> NRF_CLOCK_LF_ACCURACY_250_PPM 
// <1=> NRF_CLOCK_LF_ACCURACY_500_PPM 
// <2=> NRF_CLOCK_LF_ACCURACY_150_PPM 
// <3=> NRF_CLOCK_LF_ACCURACY_100_PPM 
// <4=> NRF_CLOCK_LF_ACCURACY_75_PPM 
// <5=> NRF_CLOCK_LF_ACCURACY_50_PPM 
// <6=> NRF_CLOCK_LF_ACCURACY_30_PPM 
// <7=> NRF_CLOCK_LF_ACCURACY_20_PPM 
// <8=> NRF_CLOCK_LF_ACCURACY_10_PPM 
// <9=> NRF_CLOCK_LF_ACCURACY_5_PPM 
// <10=> NRF_CLOCK_LF_ACCURACY_2_PPM 
// <11=> NRF_CLOCK_LF_ACCURACY_1_PPM 

#ifndef NRF_SDH_CLOCK_LF_ACCURACY
#define NRF_SDH_CLOCK_LF_ACCURACY 1
#endif

[Jared]

This is a good suggestion, can you try this siltvm ?

[siltvm]

yes Jared , I tried this and just modified the parameters in the sdk_config.h file, but my problem is not solved. now am able to debug using the RTT viewer, but after the advertising_start() function, I am getting a fatal error, and i think the board reboots. Are there any other modifications needed for flashing the code into the custom nRF52810 board? My biggest confusion is that the same code works perfectly on the development board.

int main(void)
{
    bool erase_bonds;
    int len1=0;
    char cmd=0;
    
    //uint32_t time_ticks;
    //uint32_t err_code = NRF_SUCCESS;

    // Initialize.
    uart_init();
    NRF_LOG_INFO("UART INTI\n");
    log_init();
    NRF_LOG_INFO("LOG INTI\n");
    timers_init();
    NRF_LOG_INFO("TIMER INTI\n");
    NRF_LOG_INFO("BEFORE ENTER BUTTONS LED INIT \n");
    buttons_leds_init(&erase_bonds);
    NRF_LOG_INFO("BUTTON LED INIT \n");
    indication_gpio_init();
    NRF_LOG_INFO(" INDICATION GPIO INIT \n");
    //ledonoff();
    //nrf_gpio_pin_set(GREEN_LED);
    //nrf_gpio_pin_set(BLUE_LED);
    //while(1)
    //{
    //    nrf_gpio_pin_clear(GREEN_LED);
    //    nrf_gpio_pin_clear(BLUE_LED);
    //    nrf_delay_ms(200);
    //    nrf_gpio_pin_set(GREEN_LED);
    //    nrf_gpio_pin_set(BLUE_LED);



    //}
   
    power_management_init();
    NRF_LOG_INFO(" POWER MANAGEMENT INIT \n");
    ble_stack_init();
    NRF_LOG_INFO(" BLE STACK INIT \n");
    gap_params_init();
    NRF_LOG_INFO(" GAP PARAMS INIT \n");
    gatt_init();
    NRF_LOG_INFO(" GATT INIT  \n");
    services_init();
    NRF_LOG_INFO(" SERVICE  INIT \n");
    advertising_init();
    NRF_LOG_INFO(" ADVERTISING  INIT \n");
    conn_params_init();
    NRF_LOG_INFO(" CONNECTION PARAMS INIT \n");
    // Start execution.
    #ifdef UART_DEBUG
    printf("\r\nUART started.\r\n");
    #endif
    NRF_LOG_INFO("\n uart started \n.");
    NRF_LOG_INFO("Debug logging for UART over RTT started.");
    advertising_start();
    while(1)
    {
       //printf("running inside while \n");
       nrf_delay_ms(100);
       if(ConnectionStatus==1)
       {
         //printf("ConnectionStatus=1 \n");
         nrf_delay_ms(100);
         break;
       }
   
    }
  
    printf(" exit from connection \n");
    while(1)
    {
    nrf_delay_ms(200);
    if(strlen(BLEDataBuff))
    {
     printf("enter in if\n");
     cmd= ble_processcommand(BLEDataBuff);
     ble_commandprocessing(cmd);
     nrf_delay_ms(100);
     memset(BLEDataBuff,0,sizeof(BLEDataBuff));
     printf("exit in if \n");

    }

    }

[Jared]

Hi,

Can you rebuild the project in debug mode and share the log output when it faults?

regards

Jared

[siltvm]

 Jared ,Sure, when I am debugging the code, it stops at NRF_BREAKPOINT_COND in the function app_error_fault_handler(). I am attaching a screenshot for better understanding.

[Jared]

Hi.

Is "Fatal error" something you print out? From the call stack it looks like it's going into the error handler from the UART callback handler. Can you share that code?

regards

Jared

[siltvm]

hi Jared , Sorry for the delayed response, we had a holiday for the past two days. I will share my project code for better clarification. Are there any stack or heap memory allocation dependencies while flashing the code into the nRF52810? It has very little flash memory, approximately 192KB.

/**
 * 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_uart_over_ble_main main.c
 * @{
 * @ingroup  ble_sdk_app_nus_eval
 * @brief    UART over BLE application main file.
 *
 * This file contains the source code for a sample application that uses the Nordic UART service.
 * This application uses the @ref srvlib_conn_params module.
 */


#include <stdint.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf.h"
#include "ble_hci.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 "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "app_timer.h"
#include "ble_nus.h"
#include "app_uart.h"
#include "app_util_platform.h"
#include "bsp_btn_ble.h"
#include "nrf_pwr_mgmt.h"

#if defined (UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined (UARTE_PRESENT)
#include "nrf_uarte.h"
#endif

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

//********ADDED_HEADER_FILES********//

#include "nrf_delay.h"
#include "nrf_drv_timer.h"
#include "bsp.h"
#include "app_error.h"


//********END************************//


//***************#DEFINES**********//

#define UART_DEBUG
#define TIME_MINITUE "MINITUE"
#define BLUE_LED 12 
#define GREEN_LED 11
#define VIBRATOR 26

//****************END***************//



//**************VARIABLE_DECLARATIONS********//

char BLEDataBuff[64];
char BLETempData[256];
uint8_t ConnectionStatus=0;

//**************END*******************//

//***************INSTANCE_DECLEARATIONS*******//

const nrf_drv_timer_t TIMER_LED = NRF_DRV_TIMER_INSTANCE(1);

//****************END**************************//


typedef enum BLE_COMMANDS
{
  BLE_MINITUE=1,
  BLE_SEC,
  BLE_LED,
  
}BLE_COMMANDS;

#define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */

#define DEVICE_NAME                     "Nordic_UART"                               /**< Name of device. Will be included in the advertising data. */
#define NUS_SERVICE_UUID_TYPE           BLE_UUID_TYPE_VENDOR_BEGIN                  /**< UUID type for the Nordic UART Service (vendor specific). */

#define APP_BLE_OBSERVER_PRIO           3                                           /**< Application's BLE observer priority. You shouldn't need to modify this value. */

#define APP_ADV_INTERVAL                64                                          /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */

#define APP_ADV_DURATION                18000                                       /**< The advertising duration (180 seconds) in units of 10 milliseconds. */

#define MIN_CONN_INTERVAL               MSEC_TO_UNITS(20, UNIT_1_25_MS)             /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(75, UNIT_1_25_MS)             /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY                   0                                           /**< Slave latency. */
#define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(4000, UNIT_10_MS)             /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#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 DEAD_BEEF                       0xDEADBEEF                                  /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */

#define UART_TX_BUF_SIZE                256                                         /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE                256                                         /**< UART RX buffer size. */


BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT);                                   /**< BLE NUS service instance. */
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 uint16_t   m_conn_handle          = BLE_CONN_HANDLE_INVALID;                 /**< Handle of the current connection. */
static uint16_t   m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3;            /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
static ble_uuid_t m_adv_uuids[]          =                                          /**< Universally unique service identifier. */
{
    {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}
};


/**@brief Function for assert macro callback.
 *
 * @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 analyse
 *          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] p_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 initializing the timer module.
 */
static void timers_init(void)
{
    ret_code_t err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);
}

/**@brief Function for the GAP initialization.
 *
 * @details This function will set up all the necessary GAP (Generic Access Profile) parameters of
 *          the device. It also sets the permissions and appearance.
 */
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);

    err_code = sd_ble_gap_device_name_set(&sec_mode,
                                          (const uint8_t *) DEVICE_NAME,
                                          strlen(DEVICE_NAME));
    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 data from the Nordic UART Service.
 *
 * @details This function will process the data received from the Nordic UART BLE Service and send
 *          it to the UART module.
 *
 * @param[in] p_evt       Nordic UART Service event.
 */
/**@snippet [Handling the data received over BLE] */
static void nus_data_handler(ble_nus_evt_t * p_evt)
{


    memset(BLEDataBuff,0,sizeof(BLEDataBuff));

    if (p_evt->type == BLE_NUS_EVT_RX_DATA)
    {
        uint32_t err_code;

        NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
        printf("Received data from BLE NUS. Writing data on UART.");
        NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);

        for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++)
        {
           BLEDataBuff[i]=(p_evt->params.rx_data.p_data[i]);
            //do
            //{
            //    err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
            //    if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY))
            //    {
            //        NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
            //        printf("Failed receiving NUS message. Error 0x%x. ", err_code);
            //        APP_ERROR_CHECK(err_code);
            //    }
            //} while (err_code == NRF_ERROR_BUSY);
        }
        //if (p_evt->params.rx_data.p_data[p_evt->params.rx_data.length - 1] == '\r')
        //{
        //    while (app_uart_put('\n') == NRF_ERROR_BUSY);
        //}

         #ifdef UART_DEBUG
          int length = strlen(BLEDataBuff);
          printf("\nlength : %d\n",length);
          printf("\nBLEDataBuff : %s\n ",BLEDataBuff);
        #endif
        
    }

}
/**@snippet [Handling the data received over BLE] */


/**@brief Function for initializing services that will be used by the application.
 */
static void services_init(void)
{
    uint32_t           err_code;
    ble_nus_init_t     nus_init;
    nrf_ble_qwr_init_t qwr_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);

    // Initialize NUS.
    memset(&nus_init, 0, sizeof(nus_init));

    nus_init.data_handler = nus_data_handler;

    err_code = ble_nus_init(&m_nus, &nus_init);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling an event from 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 errors from the Connection Parameters module.
 *
 * @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);

    // 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 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;
    }
}


/**@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;

    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:
            NRF_LOG_INFO("Connected");
            printf("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);
            ConnectionStatus=1;
            break;

        case BLE_GAP_EVT_DISCONNECTED:
            NRF_LOG_INFO("Disconnected");
            printf("Disconnected");
            // LED indication will be changed when advertising starts.
            m_conn_handle = BLE_CONN_HANDLE_INVALID;
            ConnectionStatus=0;
            break;

        case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
        {
            NRF_LOG_DEBUG("PHY update request.");
            printf("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_GAP_EVT_SEC_PARAMS_REQUEST:
            // Pairing not supported
            err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GATTS_EVT_SYS_ATTR_MISSING:
            // No system attributes have been stored.
            err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GATTC_EVT_TIMEOUT:
            // Disconnect on GATT Client timeout event.
            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.
            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 the SoftDevice initialization.
 *
 * @details This function initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void)
{
    NRF_LOG_INFO("ENTER IN BLE STACK INIT \n ");
    ret_code_t err_code;
    
    err_code = nrf_sdh_enable_request();
    NRF_LOG_INFO("NRF SDH ENABLE REQUEST : %d\n ",err_code);
    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 handling events from the GATT library. */
void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt)
{
    if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED))
    {
        m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
        NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
        printf("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
    }
    NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
                  p_gatt->att_mtu_desired_central,
                  p_gatt->att_mtu_desired_periph);
     printf("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
                  p_gatt->att_mtu_desired_central,
                  p_gatt->att_mtu_desired_periph);
}


/**@brief Function for initializing the GATT library. */
void gatt_init(void)
{
    ret_code_t err_code;

    err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling events from the BSP module.
 *
 * @param[in]   event   Event generated by button press.
 */
void bsp_event_handler(bsp_event_t event)
{
    uint32_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;

        default:
            break;
    }
}


/**@brief   Function for handling app_uart events.
 *
 * @details This function will receive a single character from the app_uart module and append it to
 *          a string. The string will be be sent over BLE when the last character received was a
 *          'new line' '\n' (hex 0x0A) or if the string has reached the maximum data length.
 */
/**@snippet [Handling the data received over UART] */
void uart_event_handle(app_uart_evt_t * p_event)
{
    static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
    static uint8_t index = 0;
    uint32_t       err_code;

    switch (p_event->evt_type)
    {
        case APP_UART_DATA_READY:
            UNUSED_VARIABLE(app_uart_get(&data_array[index]));
            index++;

            if ((data_array[index - 1] == '\n') ||
                (data_array[index - 1] == '\r') ||
                (index >= m_ble_nus_max_data_len))
            {
                if (index > 1)
                {
                    NRF_LOG_DEBUG("Ready to send data over BLE NUS");
                    printf("Ready to send data over BLE NUS");
                    NRF_LOG_HEXDUMP_DEBUG(data_array, index);

                    do
                    {
                        uint16_t length = (uint16_t)index;
                        err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
                        if ((err_code != NRF_ERROR_INVALID_STATE) &&
                            (err_code != NRF_ERROR_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                            APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);
                }

                index = 0;
            }
            break;

        case APP_UART_COMMUNICATION_ERROR:
            APP_ERROR_HANDLER(p_event->data.error_communication);
            break;

        case APP_UART_FIFO_ERROR:
            APP_ERROR_HANDLER(p_event->data.error_code);
            break;

        default:
            break;
    }
}
/**@snippet [Handling the data received over UART] */


/**@brief  Function for initializing the UART module.
 */
/**@snippet [UART Initialization] */
static void uart_init(void)
{
    uint32_t                     err_code;
    app_uart_comm_params_t const comm_params =
    {
        .rx_pin_no    = RX_PIN_NUMBER,
        .tx_pin_no    = TX_PIN_NUMBER,
        .rts_pin_no   = RTS_PIN_NUMBER,
        .cts_pin_no   = CTS_PIN_NUMBER,
        .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
        .use_parity   = false,
#if defined (UART_PRESENT)
        .baud_rate    = NRF_UART_BAUDRATE_115200
#else
        .baud_rate    = NRF_UARTE_BAUDRATE_115200
#endif
    };

    APP_UART_FIFO_INIT(&comm_params,
                       UART_RX_BUF_SIZE,
                       UART_TX_BUF_SIZE,
                       uart_event_handle,
                       APP_IRQ_PRIORITY_LOWEST,
                       err_code);
    APP_ERROR_CHECK(err_code);
}
/**@snippet [UART Initialization] */


/**@brief Function for initializing the Advertising functionality.
 */
static void advertising_init(void)
{
    uint32_t               err_code;
    ble_advertising_init_t init;

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

    init.advdata.name_type          = BLE_ADVDATA_FULL_NAME;
    init.advdata.include_appearance = false;
    init.advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

    init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    init.srdata.uuids_complete.p_uuids  = m_adv_uuids;

    init.config.ble_adv_fast_enabled  = true;
    init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
    init.config.ble_adv_fast_timeout  = APP_ADV_DURATION;
    init.evt_handler = on_adv_evt;

    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)
{
    NRF_LOG_INFO(" ENTER BUTTON LEDS INIT\n");
    bsp_event_t startup_event;

    uint32_t err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
    //NRF_LOG_INFO(" BSP INIT ERROR CODE : %d\n",err_code);
    APP_ERROR_CHECK(err_code);
    

    err_code = bsp_btn_ble_init(NULL, &startup_event);
    //NRF_LOG_INFO("BSP_BTN_BLE_INIT : %d\n ",err_code);
    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)
{
    if (NRF_LOG_PROCESS() == false)
    {
        nrf_pwr_mgmt_run();
    }
}


/**@brief Function for starting advertising.
 */
static void advertising_start(void)
{
    uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
    NRF_LOG_INFO("ble_advertising_start : %d\n",0);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for processing ble data (test_function)
 * function name :- process_bledata
 * parameter     :- bledata
 * process_bledata function is responsible for checking the data from ble 
   if the data matches with certain keywords do led blinking 
 * return value :- nill 
 */

void process_bledata(char *bledata)
{

 #ifdef UART_DEBUG
 printf("\n enter in process bledata \n");
 #endif
  
 if (strstr(bledata,"BLUE") != NULL)
     {
       printf("RED LED GLOW \n");
       nrf_gpio_pin_set(BLUE_LED);
       nrf_delay_ms(200);
       nrf_gpio_pin_clear(BLUE_LED);

     }

 else if(strstr(bledata,"GREEN") != NULL)
     {
       printf("GREEN LED GLOW \n");
       nrf_gpio_pin_set(GREEN_LED);
       nrf_delay_ms(200);
       nrf_gpio_pin_clear(GREEN_LED);

     }

 else 
    {
       
      printf("unwanted data : %s\n",bledata);
    }

}


/**@brief Function for led configuration 
 * function name :- indication_led_init
 * parameter     :- nill
 * indication_led_init function is responsible for configuring the leds   
 * return value :- nill 
 */
void indication_gpio_init()
{

  nrf_gpio_cfg_output(GREEN_LED);
  nrf_gpio_cfg_output(BLUE_LED);
  //nrf_gpio_cfg_output(VIBRATOR);


}

void ledonoff()
{

 nrf_gpio_cfg_output(GREEN_LED);
 nrf_gpio_cfg_output(BLUE_LED);
 while(1)
 {
 nrf_gpio_pin_clear(GREEN_LED);
 nrf_gpio_pin_clear(BLUE_LED);
 //nrf_gpio_pin_clear(VIBRATOR);
 nrf_delay_ms(200);
 nrf_gpio_pin_set(GREEN_LED);
 nrf_gpio_pin_set(BLUE_LED);
 }



}

/**
 * @brief Handler for timer events.
 */
void timer_led_event_handler(nrf_timer_event_t event_type, void* p_context)
{
    static uint32_t i;
    int j=0;
    uint32_t led_to_invert = ((i++) % LEDS_NUMBER);

    switch (event_type)
    {
        case NRF_TIMER_EVENT_COMPARE0:
             nrf_gpio_pin_clear(GREEN_LED);
             nrf_gpio_pin_clear(BLUE_LED);
             //nrf_gpio_pin_clear(VIBRATOR);
             nrf_delay_ms(200);
             nrf_gpio_pin_set(GREEN_LED);
             nrf_gpio_pin_set(BLUE_LED);
             //nrf_gpio_pin_set(VIBRATOR);
             // nrf_gpio_pin_set(BLUE_LED);
           //  nrf_delay_ms(200);
            // nrf_gpio_pin_clear(BLUE_LED);
            //bsp_board_led_invert(led_to_invert);
           // nrf_gpio_pin_toggle(GREEN_LED);
            //nrf_gpio_pin_toggle(BLUE_LED);
            
            
            break;

        default:
            //Do nothing.
            break;
    }
}

/**@brief Function for minitue to milliseconds conversion  
 * function name :- minituetomilli
 * parameter     :- bledatabuff
 * the function is responsible for converting mintue to millisecond conversion   
 * return value :- converted milliseconds 
 */
uint32_t  minitue_to_milli(char *data)
{
    printf("received data: %s\n", data);
    int minit = 0;
    minit = atoi(data);
    printf("minit: %d\n", minit);
    
    uint32_t milliseconds = minit * 60000; // convert minutes to milliseconds
    printf("milliseconds: %d\n", milliseconds);
    return milliseconds;
}



/**@brief Function for setting timer   
 * function name :- timer_setting
 * parameter     :- BLETempData
 * the function is responsible for setting the trigger intervel of timer    
 * return value :- nill
 */
void timer_setting(char *data)
{
  printf("enter inside timer settings\n");
  char *token;
  uint32_t time_ticks;
  uint32_t err_code = NRF_SUCCESS;
 // int milliseconds =0;
  uint32_t time_ms=0;
  token = strtok(data + strlen(TIME_MINITUE), ",");
  printf("token = %s",token);
  time_ms=minitue_to_milli(token);
  printf(" time_ms : %d\n",time_ms);
  nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
  err_code = nrf_drv_timer_init(&TIMER_LED, &timer_cfg, timer_led_event_handler);
  printf(" nrf_drv_timer_init : %d\n",err_code);
  APP_ERROR_CHECK(err_code);

  time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_LED, time_ms);
  printf("time_ticks : %d\n",time_ticks);

  nrf_drv_timer_extended_compare(
  &TIMER_LED, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);

  nrf_drv_timer_enable(&TIMER_LED);


}



/**@brief Function for processsing ble commands    
 * function name :- ble_processcommand
 * parameter     :- cmd
 * the function is responsible for calling the functions based on commands      
 * return value :- nill 
 */
void ble_commandprocessing(char command)
{

  printf("enter inside ble command processing \n ");
  switch(command)
  {
    case BLE_MINITUE  :   printf("enter in timer settngs \n");
                          timer_setting(BLETempData);
                          break;

  }


}


/**@brief Function for processsing ble commands    
 * function name :- ble_processcommand
 * parameter     :- BLETempData
 * the function is responsible for processing ble commands     
 * return value :- enum value of matched keyword in bluetooth command
 */
char ble_processcommand(char *data)
{

 printf(" enter inside ble processcommand\n ");
 memcpy(BLETempData,data,strlen(data));
 nrf_delay_ms(100);
 if (strstr(data,TIME_MINITUE) != NULL)
 return BLE_MINITUE;



}

/**@brief Application main function.
 */
int main(void)
{
    bool erase_bonds;
    int len1=0;
    char cmd=0;
    
    //uint32_t time_ticks;
    //uint32_t err_code = NRF_SUCCESS;

    // Initialize.
    uart_init();
    NRF_LOG_INFO("UART INTI\n");
    log_init();
    NRF_LOG_INFO("LOG INTI\n");
    timers_init();
    NRF_LOG_INFO("TIMER INTI\n");
    NRF_LOG_INFO("BEFORE ENTER BUTTONS LED INIT \n");
    buttons_leds_init(&erase_bonds);
    NRF_LOG_INFO("BUTTON LED INIT \n");
    indication_gpio_init();
    NRF_LOG_INFO(" INDICATION GPIO INIT \n");
    //ledonoff();
    //nrf_gpio_pin_set(GREEN_LED);
    //nrf_gpio_pin_set(BLUE_LED);
    //while(1)
    //{
    //    nrf_gpio_pin_clear(GREEN_LED);
    //    nrf_gpio_pin_clear(BLUE_LED);
    //    nrf_delay_ms(200);
    //    nrf_gpio_pin_set(GREEN_LED);
    //    nrf_gpio_pin_set(BLUE_LED);



    //}
   
    power_management_init();
    NRF_LOG_INFO(" POWER MANAGEMENT INIT \n");
    ble_stack_init();
    NRF_LOG_INFO(" BLE STACK INIT \n");
    gap_params_init();
    NRF_LOG_INFO(" GAP PARAMS INIT \n");
    gatt_init();
    NRF_LOG_INFO(" GATT INIT  \n");
    services_init();
    NRF_LOG_INFO(" SERVICE  INIT \n");
    advertising_init();
    NRF_LOG_INFO(" ADVERTISING  INIT \n");
    conn_params_init();
    NRF_LOG_INFO(" CONNECTION PARAMS INIT \n");
    // Start execution.
    #ifdef UART_DEBUG
    printf("\r\nUART started.\r\n");
    #endif
    NRF_LOG_INFO("\n uart started \n.");
    NRF_LOG_INFO("Debug logging for UART over RTT started.");
    advertising_start();
    NRF_LOG_INFO("ADVERTISING STARTED \n.");
    while(1)
    {
       //printf("running inside while \n");
       nrf_delay_ms(100);
       if(ConnectionStatus==1)
       {
         //printf("ConnectionStatus=1 \n");
         nrf_delay_ms(100);
         break;
       }
   
    }
  
    printf(" exit from connection \n");
    while(1)
    {
    nrf_delay_ms(200);
    if(strlen(BLEDataBuff))
    {
     printf("enter in if\n");
     cmd= ble_processcommand(BLEDataBuff);
     ble_commandprocessing(cmd);
     nrf_delay_ms(100);
     memset(BLEDataBuff,0,sizeof(BLEDataBuff));
     printf("exit in if \n");

    }

    }
   
    
    
    while (1)
    {
        __WFI();
    }
   
}


/**
 * @}
 */