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merging interactive command and buttonless dfu base on sdk _17.0.2

base on https://www.u-blox.com/sites/default/files/Add-NordicSemiconductorDFU-to-SDKexample_AppNote_UBX-19050198.pdf

modify some of the code here:

main.c:

/**
 * Copyright (c) 2018 - 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.
 *
 */

/**@brief BLE interactive app example application main file.
 *
 * @detail This application demonstrates how to control a BLE connection using the command line interface.
 *
 * @note This application requires the use of an external ECC library
 *       for public key and shared secret calculation.
 *       Refer to the application's documentation for more details.
 *
 */

#include "sdk_config.h"
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <stddef.h>
#include <ctype.h>
#include "nordic_common.h"
#include "app_timer.h"

#include "nrf_pwr_mgmt.h"

#include "nrf_cli.h"
#include "nrf_cli_uart.h"
#include "nrf_cli_rtt.h"

#include "boards.h"

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

#include "ble_m.h"
#include "cli_m.h"
#include "pm_m.h"
#include "nfc_m.h"
#include "nfc_central_m.h"

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

#include "ble_nus.h"
#include "nrf_ble_qwr.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
//#include "ble_advertising.c"
//#include "ble_conn_state.c"
#include "nrf_soc.h"
#include "nrf_log.h"
#include "sdk_errors.h"
#include "nrf_sdh_ble.h"

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



#define FOUND_DEVICE_REFRESH_TIME APP_TIMER_TICKS(SCAN_LIST_REFRESH_INTERVAL) /**< Time after which the device list is clean and refreshed. */



//#define DEVICE_NAME                     "Nordic_Buttonless"                         /**< 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                300                                         /**< The advertising interval (in units of 0.625 ms. This value corresponds to 187.5 ms). */
#define APP_ADV_DURATION                18000                                       /**< The advertising duration (180 seconds) in units of 10 milliseconds. */

#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 DEAD_BEEF                       0xDEADBEEF        
/**@brief Command line interface instance.
 */
NRF_CLI_UART_DEF(m_cli_uart_transport, 0, 64, 16);
NRF_CLI_DEF(m_cli_uart, "uart_cli:~$ ", &m_cli_uart_transport.transport, '\r', CLI_LOG_QUEUE_SIZE);

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);         
  static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID;  
  static void disconnect(uint16_t conn_handle, void * p_context);
  static void ble_dfu_evt_handler(ble_dfu_buttonless_evt_type_t event);
  static void services_init(void);
  static void advertising_config_get(ble_adv_modes_config_t * p_config);
  static void buttons_leds_init(bool * p_erase_bonds);
  static void bsp_event_handler(bsp_event_t event);
  static void advertising_start(bool erase_bonds);
/**@brief Function for starting a command line interface working on the UART transport layer.
 */
static void cli_uart_start(void)
{
    ret_code_t ret;

    ret = nrf_cli_start(&m_cli_uart);
    APP_ERROR_CHECK(ret);
}


#if NRF_MODULE_ENABLED(CLI_RTT)
NRF_CLI_RTT_DEF(m_cli_rtt_transport);
NRF_CLI_DEF(m_cli_rtt, "rtt_cli:~$ ", &m_cli_rtt_transport.transport, '\n', CLI_LOG_QUEUE_SIZE);

/**@brief Function for starting a command line interface working on the RTT transport layer.
 */
static void cli_rtt_start(void)
{
    ret_code_t ret;

    ret = nrf_cli_init(&m_cli_rtt, NULL, true, true, NRF_LOG_SEVERITY_INFO);
    APP_ERROR_CHECK(ret);

    ret = nrf_cli_start(&m_cli_rtt);
    APP_ERROR_CHECK(ret);
}


#endif // CLI_RTT

/**@brief Function for configuring UART for CLI.
 */
static void cli_uart_cfg(void)
{
    ret_code_t            err_code;
    nrf_drv_uart_config_t uart_config = NRF_DRV_UART_DEFAULT_CONFIG;

    uart_config.pseltxd = TX_PIN_NUMBER;
    uart_config.pselrxd = RX_PIN_NUMBER;
    uart_config.hwfc    = NRF_UART_HWFC_DISABLED;
    err_code            = nrf_cli_init(&m_cli_uart, &uart_config, true, true, NRF_LOG_SEVERITY_INFO);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for handling the adv_list_timer event, which refreshes the connectable devices.
 */
static void adv_list_timer_handle(void * p_context)
{
    if (is_scanning())
    {
        connect_addr_clear();
        scan_device_info_clear();
    }
}


/**@brief Function for initializing logging.
 */
static void log_init(void)
{
    ret_code_t err_code = NRF_LOG_INIT(app_timer_cnt_get);

    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the timer.
 */
static void timer_init(void)
{
    ret_code_t err_code = app_timer_init();

    APP_ERROR_CHECK(err_code);

    // Timer for refreshing scanned devices data.
    APP_TIMER_DEF(adv_list_timer);
    err_code = app_timer_create(&adv_list_timer, APP_TIMER_MODE_REPEATED, adv_list_timer_handle);
    APP_ERROR_CHECK(err_code);

    err_code = app_timer_start(adv_list_timer, FOUND_DEVICE_REFRESH_TIME, NULL);
    APP_ERROR_CHECK(err_code);
}


/**@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_handler(void)
{
    ret_code_t err_code;
    err_code = nrf_ble_lesc_request_handler();
    APP_ERROR_CHECK(err_code);
    
#if defined(ADAFRUIT_SHIELD) && (ADAFRUIT_SHIELD == 1)
    nfc_tag_process();
#endif // ADAFRUIT_SHIELD

    nrf_cli_process(&m_cli_uart);
    
#if NRF_MODULE_ENABLED(CLI_RTT)
    nrf_cli_process(&m_cli_rtt);
#endif // CLI_RTT
    
    if (NRF_LOG_PROCESS() == false)
    {
        nrf_pwr_mgmt_run();
    }
}


int main(void)
{

    bool       erase_bonds;
    ret_code_t err_code;

  //err_code = ble_dfu_buttonless_async_svci_init();
    APP_ERROR_CHECK(err_code);



    power_management_init();
    log_init();
    timer_init();
    // Console start
    cli_uart_cfg();
    cli_uart_start();
#if NRF_MODULE_ENABLED(CLI_RTT)
    cli_rtt_start();
#endif // CLI_RTT
    ble_m_init();
    peer_manager_init();
    nfc_pairing_init();
#if NRF_MODULE_ENABLED(ADAFRUIT_SHIELD)
    nfc_central_init();
#endif // ADAFRUIT_SHIELD
    bond_get();

    NRF_LOG_RAW_INFO("BLE app with command line interface example started.\r\n");
    NRF_LOG_RAW_INFO("Press Tab to view all available commands.\r\n");


    APP_ERROR_CHECK(err_code);

    //timers_init();
   // power_management_init();
   // buttons_leds_init(&erase_bonds);
   // ble_stack_init();
    //peer_manager_init();
   // gap_params_init();
    //gatt_init();
   // advertising_init();
    services_init();
    //conn_params_init();

  //  NRF_LOG_INFO("Buttonless DFU Application started.");

    // Start execution.
    //application_timers_start();
   //advertising_start(erase_bonds);




    for (;;)
    {
        idle_state_handler();
    }
}


/**@brief Function for handling DFU events
*
* @details This function is called when entering buttonless DFU
*
* @param[in] event Buttonless DFU event.
*/
static void ble_dfu_buttonless_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\r\n");
 break;
 case BLE_DFU_EVT_BOOTLOADER_ENTER:
 NRF_LOG_INFO("Device will enter bootloader mode\r\n");
 break;
 case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
 NRF_LOG_ERROR("Device failed to enter bootloader mode\r\n");
 break;
 default:
 NRF_LOG_INFO("Unknown event from ble_dfu.\r\n");
 break;
 }
}



/**@brief Function for handling bootloader power management events
*
* @details This function is called to set a persistent register which informs the
* bootloader it should continue or pass control back to the application
*
* @param[in] event Power management event.
*/
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\r\n");
 // Change this code to tailor to your reset strategy.
 // Returning false here means that the device is not ready
 // to jump to DFU mode yet.
 //
 // Here is an example using a variable to delay resetting the device:
 //
 /* if (!im_ready_for_reset
 {
 return false;
 }
 */
 break;
 default:
 // 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\r\n");
 return true;
}

NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0);


static void nrf_qwr_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}
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);

    /* YOUR_JOB: Add code to initialize the services used by the application.
       uint32_t                           err_code;
       ble_xxs_init_t                     xxs_init;
       ble_yys_init_t                     yys_init;

       // Initialize XXX Service.
       memset(&xxs_init, 0, sizeof(xxs_init));

       xxs_init.evt_handler                = NULL;
       xxs_init.is_xxx_notify_supported    = true;
       xxs_init.ble_xx_initial_value.level = 100;

       err_code = ble_bas_init(&m_xxs, &xxs_init);
       APP_ERROR_CHECK(err_code);

       // Initialize YYY Service.
       memset(&yys_init, 0, sizeof(yys_init));
       yys_init.evt_handler                  = on_yys_evt;
       yys_init.ble_yy_initial_value.counter = 0;

       err_code = ble_yy_service_init(&yys_init, &yy_init);
       APP_ERROR_CHECK(err_code);
     */
}



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;
    }
}



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);
    }
}

static void advertising_start(bool erase_bonds)
{
    if (erase_bonds == true)
    {
        delete_bonds();
        // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
    }
    else
    {
        uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
        APP_ERROR_CHECK(err_code);

        NRF_LOG_DEBUG("advertising is started");
    }
}

int main(void)
{

    bool       erase_bonds;
    ret_code_t err_code;

  //err_code = ble_dfu_buttonless_async_svci_init();
    APP_ERROR_CHECK(err_code);



    power_management_init();
    log_init();
    timer_init();
    // Console start
    cli_uart_cfg();
    cli_uart_start();
#if NRF_MODULE_ENABLED(CLI_RTT)
    cli_rtt_start();
#endif // CLI_RTT
    ble_m_init();
    peer_manager_init();
    nfc_pairing_init();
#if NRF_MODULE_ENABLED(ADAFRUIT_SHIELD)
    nfc_central_init();
#endif // ADAFRUIT_SHIELD
    bond_get();

    NRF_LOG_RAW_INFO("BLE app with command line interface example started.\r\n");
    NRF_LOG_RAW_INFO("Press Tab to view all available commands.\r\n");


    APP_ERROR_CHECK(err_code);

    //timers_init();
   // power_management_init();
   // buttons_leds_init(&erase_bonds);
   // ble_stack_init();
    //peer_manager_init();
   // gap_params_init();
    //gatt_init();
   // advertising_init();
    services_init();
    //conn_params_init();

  //  NRF_LOG_INFO("Buttonless DFU Application started.");

    // Start execution.
    //application_timers_start();
   //advertising_start(erase_bonds);




    for (;;)
    {
        idle_state_handler();
    }
}


/**@brief Function for handling DFU events
*
* @details This function is called when entering buttonless DFU
*
* @param[in] event Buttonless DFU event.
*/
static void ble_dfu_buttonless_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\r\n");
 break;
 case BLE_DFU_EVT_BOOTLOADER_ENTER:
 NRF_LOG_INFO("Device will enter bootloader mode\r\n");
 break;
 case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
 NRF_LOG_ERROR("Device failed to enter bootloader mode\r\n");
 break;
 default:
 NRF_LOG_INFO("Unknown event from ble_dfu.\r\n");
 break;
 }
}



/**@brief Function for handling bootloader power management events
*
* @details This function is called to set a persistent register which informs the
* bootloader it should continue or pass control back to the application
*
* @param[in] event Power management event.
*/
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\r\n");
 // Change this code to tailor to your reset strategy.
 // Returning false here means that the device is not ready
 // to jump to DFU mode yet.
 //
 // Here is an example using a variable to delay resetting the device:
 //
 /* if (!im_ready_for_reset
 {
 return false;
 }
 */
 break;
 default:
 // 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\r\n");
 return true;
}

NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0);


static void nrf_qwr_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}
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);

    /* YOUR_JOB: Add code to initialize the services used by the application.
       uint32_t                           err_code;
       ble_xxs_init_t                     xxs_init;
       ble_yys_init_t                     yys_init;

       // Initialize XXX Service.
       memset(&xxs_init, 0, sizeof(xxs_init));

       xxs_init.evt_handler                = NULL;
       xxs_init.is_xxx_notify_supported    = true;
       xxs_init.ble_xx_initial_value.level = 100;

       err_code = ble_bas_init(&m_xxs, &xxs_init);
       APP_ERROR_CHECK(err_code);

       // Initialize YYY Service.
       memset(&yys_init, 0, sizeof(yys_init));
       yys_init.evt_handler                  = on_yys_evt;
       yys_init.ble_yy_initial_value.counter = 0;

       err_code = ble_yy_service_init(&yys_init, &yy_init);
       APP_ERROR_CHECK(err_code);
     */
}



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;
    }
}



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);
    }
}

static void advertising_start(bool erase_bonds)
{
    if (erase_bonds == true)
    {
        delete_bonds();
        // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
    }
    else
    {
        uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
        APP_ERROR_CHECK(err_code);

        NRF_LOG_DEBUG("advertising is started");
    }
}

basically i just change the main.c code what the pdf said after inserting some code the interactivecommand works fine but the buttonless dfu still not working anyone know what i miss

I almost have done the all the changes which are needed flashplacement directory sdkconfig................. 

anyone do have clue here 

Parents
  • i have done to fix the code

    if someone need  a step by step guide read 

    https://www.u-blox.com/sites/default/files/Add-NordicSemiconductorDFU-to-SDKexample_AppNote_UBX-19050198.pdf

    begin in 5.2

    it speak 90% right base on this version of this dfu

    here is my solution:

    recommend reading this https://devzone.nordicsemi.com/f/nordic-q-a/48872/how-to-merge-one-application-with-dfu-feature

    sdk version 17.0.2

    main.c  

    /**
     * Copyright (c) 2018 - 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.
     *
     */
    
    /**@brief BLE interactive app example application main file.
     *
     * @detail This application demonstrates how to control a BLE connection using the command line interface.
     *
     * @note This application requires the use of an external ECC library
     *       for public key and shared secret calculation.
     *       Refer to the application's documentation for more details.
     *
     */
    
    #include "sdk_config.h"
    #include <stdint.h>
    #include <stdio.h>
    #include <string.h>
    #include <stdbool.h>
    #include <stddef.h>
    #include <ctype.h>
    #include "nordic_common.h"
    #include "app_timer.h"
    
    #include "nrf_pwr_mgmt.h"
    
    #include "nrf_cli.h"
    #include "nrf_cli_uart.h"
    #include "nrf_cli_rtt.h"
    
    #include "boards.h"
    
    #include "nrf_log.h"
    #include "nrf_log_ctrl.h"
    #include "nrf_log_default_backends.h"
    #include "nrf_ble_lesc.h"
    
    #include "ble_m.h"
    #include "cli_m.h"
    #include "pm_m.h"
    #include "nfc_m.h"
    #include "nfc_central_m.h"
    
    #include "nrf_dfu_ble_svci_bond_sharing.h"
    #include "nrf_svci_async_function.h"
    #include "nrf_svci_async_handler.h"
    #include "ble_dfu.h"
    #include "nrf_bootloader_info.h"
    
    #include "ble_nus.h"
    #include "nrf_ble_qwr.h"
    #include "ble_advdata.h"
    #include "ble_advertising.h"
    //#include "ble_advertising.c"
    //#include "ble_conn_state.c"
    #include "nrf_soc.h"
    #include "nrf_log.h"
    #include "sdk_errors.h"
    #include "nrf_sdh_ble.h"
    
    #include "nrf_dfu_ble_svci_bond_sharing.h"
    #include "nrf_svci_async_function.h"
    #include "nrf_svci_async_handler.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 "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 "ble_gap.h"
    
    
    
    #define FOUND_DEVICE_REFRESH_TIME APP_TIMER_TICKS(SCAN_LIST_REFRESH_INTERVAL) /**< Time after which the device list is clean and refreshed. */
    
    
    
    //#define DEVICE_NAME                     "Nordic_Buttonless"                         /**< 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                300                                         /**< The advertising interval (in units of 0.625 ms. This value corresponds to 187.5 ms). */
    #define APP_ADV_DURATION                18000                                       /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
    
    #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 DEAD_BEEF                       0xDEADBEEF        
    /**@brief Command line interface instance.
     */
    NRF_CLI_UART_DEF(m_cli_uart_transport, 0, 64, 16);
    NRF_CLI_DEF(m_cli_uart, "uart_cli:~$ ", &m_cli_uart_transport.transport, '\r', CLI_LOG_QUEUE_SIZE);
    
    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);         
      static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID;  
      static void disconnect(uint16_t conn_handle, void * p_context);
      static void ble_dfu_evt_handler(ble_dfu_buttonless_evt_type_t event);
      static void services_init(void);
      static void advertising_config_get(ble_adv_modes_config_t * p_config);
      static void buttons_leds_init(bool * p_erase_bonds);
      static void bsp_event_handler(bsp_event_t event);
      static void advertising_start(bool erase_bonds);
    /**@brief Function for starting a command line interface working on the UART transport layer.
     */
    static void cli_uart_start(void)
    {
        ret_code_t ret;
    
        ret = nrf_cli_start(&m_cli_uart);
        APP_ERROR_CHECK(ret);
    }
    
    
    #if NRF_MODULE_ENABLED(CLI_RTT)
    NRF_CLI_RTT_DEF(m_cli_rtt_transport);
    NRF_CLI_DEF(m_cli_rtt, "rtt_cli:~$ ", &m_cli_rtt_transport.transport, '\n', CLI_LOG_QUEUE_SIZE);
    
    /**@brief Function for starting a command line interface working on the RTT transport layer.
     */
    static void cli_rtt_start(void)
    {
        ret_code_t ret;
    
        ret = nrf_cli_init(&m_cli_rtt, NULL, true, true, NRF_LOG_SEVERITY_INFO);
        APP_ERROR_CHECK(ret);
    
        ret = nrf_cli_start(&m_cli_rtt);
        APP_ERROR_CHECK(ret);
    }
    
    
    #endif // CLI_RTT
    
    /**@brief Function for configuring UART for CLI.
     */
    static void cli_uart_cfg(void)
    {
        ret_code_t            err_code;
        nrf_drv_uart_config_t uart_config = NRF_DRV_UART_DEFAULT_CONFIG;
    
        uart_config.pseltxd = TX_PIN_NUMBER;
        uart_config.pselrxd = RX_PIN_NUMBER;
        uart_config.hwfc    = NRF_UART_HWFC_DISABLED;
        err_code            = nrf_cli_init(&m_cli_uart, &uart_config, true, true, NRF_LOG_SEVERITY_INFO);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling the adv_list_timer event, which refreshes the connectable devices.
     */
    static void adv_list_timer_handle(void * p_context)
    {
        if (is_scanning())
        {
            connect_addr_clear();
            scan_device_info_clear();
        }
    }
    
    
    /**@brief Function for initializing logging.
     */
    static void log_init(void)
    {
        ret_code_t err_code = NRF_LOG_INIT(app_timer_cnt_get);
    
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the timer.
     */
    static void timer_init(void)
    {
        ret_code_t err_code = app_timer_init();
    
        APP_ERROR_CHECK(err_code);
    
        // Timer for refreshing scanned devices data.
        APP_TIMER_DEF(adv_list_timer);
        err_code = app_timer_create(&adv_list_timer, APP_TIMER_MODE_REPEATED, adv_list_timer_handle);
        APP_ERROR_CHECK(err_code);
    
        err_code = app_timer_start(adv_list_timer, FOUND_DEVICE_REFRESH_TIME, NULL);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@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_handler(void)
    {
        ret_code_t err_code;
        err_code = nrf_ble_lesc_request_handler();
        APP_ERROR_CHECK(err_code);
        
    #if defined(ADAFRUIT_SHIELD) && (ADAFRUIT_SHIELD == 1)
        nfc_tag_process();
    #endif // ADAFRUIT_SHIELD
    
        nrf_cli_process(&m_cli_uart);
        
    #if NRF_MODULE_ENABLED(CLI_RTT)
        nrf_cli_process(&m_cli_rtt);
    #endif // CLI_RTT
        
        if (NRF_LOG_PROCESS() == false)
        {
            nrf_pwr_mgmt_run();
        }
    }
    
    
    int main(void)
    {
    
        bool       erase_bonds;
        ret_code_t err_code;
    
      //
        APP_ERROR_CHECK(err_code);
    
    
    
    
        power_management_init();
        log_init();
    
    
        err_code = ble_dfu_buttonless_async_svci_init();
        timer_init();
        // Console start
        cli_uart_cfg();
        cli_uart_start();
    #if NRF_MODULE_ENABLED(CLI_RTT)
        cli_rtt_start();
    #endif // CLI_RTT
        ble_m_init();
        peer_manager_init();
        nfc_pairing_init();
    #if NRF_MODULE_ENABLED(ADAFRUIT_SHIELD)
        nfc_central_init();
    #endif // ADAFRUIT_SHIELD
        bond_get();
    
        NRF_LOG_RAW_INFO("BLE app with command line interface example started.\r\n");
        NRF_LOG_RAW_INFO("Press Tab to view all available commands.\r\n");
    
    
        APP_ERROR_CHECK(err_code);
    
        //timers_init();
       // power_management_init();
       // buttons_leds_init(&erase_bonds);
       // ble_stack_init();
        //peer_manager_init();
       // gap_params_init();
        //gatt_init();
       // advertising_init();
        services_init();
        //conn_params_init();
    
      //  NRF_LOG_INFO("Buttonless DFU Application started.");
    
        // Start execution.
        //application_timers_start();
       //advertising_start(erase_bonds);
    
    
    
    
        for (;;)
        {
            idle_state_handler();
        }
    }
    
    
    /**@brief Function for handling DFU events
    *
    * @details This function is called when entering buttonless DFU
    *
    * @param[in] event Buttonless DFU event.
    */
    static void ble_dfu_buttonless_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\r\n");
     break;
     case BLE_DFU_EVT_BOOTLOADER_ENTER:
     NRF_LOG_INFO("Device will enter bootloader mode\r\n");
     break;
     case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
     NRF_LOG_ERROR("Device failed to enter bootloader mode\r\n");
     break;
     default:
     NRF_LOG_INFO("Unknown event from ble_dfu.\r\n");
     break;
     }
    }
    
    
    
    /**@brief Function for handling bootloader power management events
    *
    * @details This function is called to set a persistent register which informs the
    * bootloader it should continue or pass control back to the application
    *
    * @param[in] event Power management event.
    */
    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\r\n");
     // Change this code to tailor to your reset strategy.
     // Returning false here means that the device is not ready
     // to jump to DFU mode yet.
     //
     // Here is an example using a variable to delay resetting the device:
     //
     /* if (!im_ready_for_reset
     {
     return false;
     }
     */
     break;
     default:
     // 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\r\n");
     return true;
    }
    
    NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0);
    
    
    static void nrf_qwr_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    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);
    
        /* YOUR_JOB: Add code to initialize the services used by the application.
           uint32_t                           err_code;
           ble_xxs_init_t                     xxs_init;
           ble_yys_init_t                     yys_init;
    
           // Initialize XXX Service.
           memset(&xxs_init, 0, sizeof(xxs_init));
    
           xxs_init.evt_handler                = NULL;
           xxs_init.is_xxx_notify_supported    = true;
           xxs_init.ble_xx_initial_value.level = 100;
    
           err_code = ble_bas_init(&m_xxs, &xxs_init);
           APP_ERROR_CHECK(err_code);
    
           // Initialize YYY Service.
           memset(&yys_init, 0, sizeof(yys_init));
           yys_init.evt_handler                  = on_yys_evt;
           yys_init.ble_yy_initial_value.counter = 0;
    
           err_code = ble_yy_service_init(&yys_init, &yy_init);
           APP_ERROR_CHECK(err_code);
         */
    }
    
    
    
    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;
        }
    }
    
    
    
    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);
        }
    }
    
    static void advertising_start(bool erase_bonds)
    {
        if (erase_bonds == true)
        {
            delete_bonds();
            // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
        }
        else
        {
            uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
            APP_ERROR_CHECK(err_code);
    
            NRF_LOG_DEBUG("advertising is started");
        }
    }

    same as the old one but change

     err_code = ble_dfu_buttonless_async_svci_init();

    under log_init();

    also 

    In sdk_config.h you will need to increase the NRF_SDH_BLE_VS_UUID_COUNT by 1 to accommodate the DFU service UUID which is a vendor-specific UUID. 

    we can edit the required change as mentioned in the degbug terminal.

    plus nrf_log_logging and NRF_LOG_BACKEND_RTT_ENABLED should be enable in sdk_config.h file.

    int main(void)
    {
    
        bool       erase_bonds;
        ret_code_t err_code;
    
      //
        APP_ERROR_CHECK(err_code);
    
    
    
    
        power_management_init();
        log_init();
    
    
        err_code = ble_dfu_buttonless_async_svci_init();
        timer_init();
        // Console start
        cli_uart_cfg();
        cli_uart_start();
    #if NRF_MODULE_ENABLED(CLI_RTT)
        cli_rtt_start();
    #endif // CLI_RTT
        ble_m_init();
        peer_manager_init();
        nfc_pairing_init();
    #if NRF_MODULE_ENABLED(ADAFRUIT_SHIELD)
        nfc_central_init();
    #endif // ADAFRUIT_SHIELD
        bond_get();
    
        NRF_LOG_RAW_INFO("BLE app with command line interface example started.\r\n");
        NRF_LOG_RAW_INFO("Press Tab to view all available commands.\r\n");
    
    
        APP_ERROR_CHECK(err_code);
    
        //timers_init();
       // power_management_init();
       // buttons_leds_init(&erase_bonds);
       // ble_stack_init();
        //peer_manager_init();
       // gap_params_init();
        //gatt_init();
       // advertising_init();
        services_init();
        //conn_params_init();
    
      //  NRF_LOG_INFO("Buttonless DFU Application started.");
    
        // Start execution.
        //application_timers_start();
       //advertising_start(erase_bonds);
    
    
    
    
        for (;;)
        {
            idle_state_handler();
        }
    }
    

    also giving upload the  sdk_config.h for future use or someone need it

    2251.sdk_config.h

Reply
  • i have done to fix the code

    if someone need  a step by step guide read 

    https://www.u-blox.com/sites/default/files/Add-NordicSemiconductorDFU-to-SDKexample_AppNote_UBX-19050198.pdf

    begin in 5.2

    it speak 90% right base on this version of this dfu

    here is my solution:

    recommend reading this https://devzone.nordicsemi.com/f/nordic-q-a/48872/how-to-merge-one-application-with-dfu-feature

    sdk version 17.0.2

    main.c  

    /**
     * Copyright (c) 2018 - 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.
     *
     */
    
    /**@brief BLE interactive app example application main file.
     *
     * @detail This application demonstrates how to control a BLE connection using the command line interface.
     *
     * @note This application requires the use of an external ECC library
     *       for public key and shared secret calculation.
     *       Refer to the application's documentation for more details.
     *
     */
    
    #include "sdk_config.h"
    #include <stdint.h>
    #include <stdio.h>
    #include <string.h>
    #include <stdbool.h>
    #include <stddef.h>
    #include <ctype.h>
    #include "nordic_common.h"
    #include "app_timer.h"
    
    #include "nrf_pwr_mgmt.h"
    
    #include "nrf_cli.h"
    #include "nrf_cli_uart.h"
    #include "nrf_cli_rtt.h"
    
    #include "boards.h"
    
    #include "nrf_log.h"
    #include "nrf_log_ctrl.h"
    #include "nrf_log_default_backends.h"
    #include "nrf_ble_lesc.h"
    
    #include "ble_m.h"
    #include "cli_m.h"
    #include "pm_m.h"
    #include "nfc_m.h"
    #include "nfc_central_m.h"
    
    #include "nrf_dfu_ble_svci_bond_sharing.h"
    #include "nrf_svci_async_function.h"
    #include "nrf_svci_async_handler.h"
    #include "ble_dfu.h"
    #include "nrf_bootloader_info.h"
    
    #include "ble_nus.h"
    #include "nrf_ble_qwr.h"
    #include "ble_advdata.h"
    #include "ble_advertising.h"
    //#include "ble_advertising.c"
    //#include "ble_conn_state.c"
    #include "nrf_soc.h"
    #include "nrf_log.h"
    #include "sdk_errors.h"
    #include "nrf_sdh_ble.h"
    
    #include "nrf_dfu_ble_svci_bond_sharing.h"
    #include "nrf_svci_async_function.h"
    #include "nrf_svci_async_handler.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 "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 "ble_gap.h"
    
    
    
    #define FOUND_DEVICE_REFRESH_TIME APP_TIMER_TICKS(SCAN_LIST_REFRESH_INTERVAL) /**< Time after which the device list is clean and refreshed. */
    
    
    
    //#define DEVICE_NAME                     "Nordic_Buttonless"                         /**< 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                300                                         /**< The advertising interval (in units of 0.625 ms. This value corresponds to 187.5 ms). */
    #define APP_ADV_DURATION                18000                                       /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
    
    #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 DEAD_BEEF                       0xDEADBEEF        
    /**@brief Command line interface instance.
     */
    NRF_CLI_UART_DEF(m_cli_uart_transport, 0, 64, 16);
    NRF_CLI_DEF(m_cli_uart, "uart_cli:~$ ", &m_cli_uart_transport.transport, '\r', CLI_LOG_QUEUE_SIZE);
    
    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);         
      static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID;  
      static void disconnect(uint16_t conn_handle, void * p_context);
      static void ble_dfu_evt_handler(ble_dfu_buttonless_evt_type_t event);
      static void services_init(void);
      static void advertising_config_get(ble_adv_modes_config_t * p_config);
      static void buttons_leds_init(bool * p_erase_bonds);
      static void bsp_event_handler(bsp_event_t event);
      static void advertising_start(bool erase_bonds);
    /**@brief Function for starting a command line interface working on the UART transport layer.
     */
    static void cli_uart_start(void)
    {
        ret_code_t ret;
    
        ret = nrf_cli_start(&m_cli_uart);
        APP_ERROR_CHECK(ret);
    }
    
    
    #if NRF_MODULE_ENABLED(CLI_RTT)
    NRF_CLI_RTT_DEF(m_cli_rtt_transport);
    NRF_CLI_DEF(m_cli_rtt, "rtt_cli:~$ ", &m_cli_rtt_transport.transport, '\n', CLI_LOG_QUEUE_SIZE);
    
    /**@brief Function for starting a command line interface working on the RTT transport layer.
     */
    static void cli_rtt_start(void)
    {
        ret_code_t ret;
    
        ret = nrf_cli_init(&m_cli_rtt, NULL, true, true, NRF_LOG_SEVERITY_INFO);
        APP_ERROR_CHECK(ret);
    
        ret = nrf_cli_start(&m_cli_rtt);
        APP_ERROR_CHECK(ret);
    }
    
    
    #endif // CLI_RTT
    
    /**@brief Function for configuring UART for CLI.
     */
    static void cli_uart_cfg(void)
    {
        ret_code_t            err_code;
        nrf_drv_uart_config_t uart_config = NRF_DRV_UART_DEFAULT_CONFIG;
    
        uart_config.pseltxd = TX_PIN_NUMBER;
        uart_config.pselrxd = RX_PIN_NUMBER;
        uart_config.hwfc    = NRF_UART_HWFC_DISABLED;
        err_code            = nrf_cli_init(&m_cli_uart, &uart_config, true, true, NRF_LOG_SEVERITY_INFO);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for handling the adv_list_timer event, which refreshes the connectable devices.
     */
    static void adv_list_timer_handle(void * p_context)
    {
        if (is_scanning())
        {
            connect_addr_clear();
            scan_device_info_clear();
        }
    }
    
    
    /**@brief Function for initializing logging.
     */
    static void log_init(void)
    {
        ret_code_t err_code = NRF_LOG_INIT(app_timer_cnt_get);
    
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@brief Function for initializing the timer.
     */
    static void timer_init(void)
    {
        ret_code_t err_code = app_timer_init();
    
        APP_ERROR_CHECK(err_code);
    
        // Timer for refreshing scanned devices data.
        APP_TIMER_DEF(adv_list_timer);
        err_code = app_timer_create(&adv_list_timer, APP_TIMER_MODE_REPEATED, adv_list_timer_handle);
        APP_ERROR_CHECK(err_code);
    
        err_code = app_timer_start(adv_list_timer, FOUND_DEVICE_REFRESH_TIME, NULL);
        APP_ERROR_CHECK(err_code);
    }
    
    
    /**@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_handler(void)
    {
        ret_code_t err_code;
        err_code = nrf_ble_lesc_request_handler();
        APP_ERROR_CHECK(err_code);
        
    #if defined(ADAFRUIT_SHIELD) && (ADAFRUIT_SHIELD == 1)
        nfc_tag_process();
    #endif // ADAFRUIT_SHIELD
    
        nrf_cli_process(&m_cli_uart);
        
    #if NRF_MODULE_ENABLED(CLI_RTT)
        nrf_cli_process(&m_cli_rtt);
    #endif // CLI_RTT
        
        if (NRF_LOG_PROCESS() == false)
        {
            nrf_pwr_mgmt_run();
        }
    }
    
    
    int main(void)
    {
    
        bool       erase_bonds;
        ret_code_t err_code;
    
      //
        APP_ERROR_CHECK(err_code);
    
    
    
    
        power_management_init();
        log_init();
    
    
        err_code = ble_dfu_buttonless_async_svci_init();
        timer_init();
        // Console start
        cli_uart_cfg();
        cli_uart_start();
    #if NRF_MODULE_ENABLED(CLI_RTT)
        cli_rtt_start();
    #endif // CLI_RTT
        ble_m_init();
        peer_manager_init();
        nfc_pairing_init();
    #if NRF_MODULE_ENABLED(ADAFRUIT_SHIELD)
        nfc_central_init();
    #endif // ADAFRUIT_SHIELD
        bond_get();
    
        NRF_LOG_RAW_INFO("BLE app with command line interface example started.\r\n");
        NRF_LOG_RAW_INFO("Press Tab to view all available commands.\r\n");
    
    
        APP_ERROR_CHECK(err_code);
    
        //timers_init();
       // power_management_init();
       // buttons_leds_init(&erase_bonds);
       // ble_stack_init();
        //peer_manager_init();
       // gap_params_init();
        //gatt_init();
       // advertising_init();
        services_init();
        //conn_params_init();
    
      //  NRF_LOG_INFO("Buttonless DFU Application started.");
    
        // Start execution.
        //application_timers_start();
       //advertising_start(erase_bonds);
    
    
    
    
        for (;;)
        {
            idle_state_handler();
        }
    }
    
    
    /**@brief Function for handling DFU events
    *
    * @details This function is called when entering buttonless DFU
    *
    * @param[in] event Buttonless DFU event.
    */
    static void ble_dfu_buttonless_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\r\n");
     break;
     case BLE_DFU_EVT_BOOTLOADER_ENTER:
     NRF_LOG_INFO("Device will enter bootloader mode\r\n");
     break;
     case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
     NRF_LOG_ERROR("Device failed to enter bootloader mode\r\n");
     break;
     default:
     NRF_LOG_INFO("Unknown event from ble_dfu.\r\n");
     break;
     }
    }
    
    
    
    /**@brief Function for handling bootloader power management events
    *
    * @details This function is called to set a persistent register which informs the
    * bootloader it should continue or pass control back to the application
    *
    * @param[in] event Power management event.
    */
    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\r\n");
     // Change this code to tailor to your reset strategy.
     // Returning false here means that the device is not ready
     // to jump to DFU mode yet.
     //
     // Here is an example using a variable to delay resetting the device:
     //
     /* if (!im_ready_for_reset
     {
     return false;
     }
     */
     break;
     default:
     // 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\r\n");
     return true;
    }
    
    NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0);
    
    
    static void nrf_qwr_error_handler(uint32_t nrf_error)
    {
        APP_ERROR_HANDLER(nrf_error);
    }
    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);
    
        /* YOUR_JOB: Add code to initialize the services used by the application.
           uint32_t                           err_code;
           ble_xxs_init_t                     xxs_init;
           ble_yys_init_t                     yys_init;
    
           // Initialize XXX Service.
           memset(&xxs_init, 0, sizeof(xxs_init));
    
           xxs_init.evt_handler                = NULL;
           xxs_init.is_xxx_notify_supported    = true;
           xxs_init.ble_xx_initial_value.level = 100;
    
           err_code = ble_bas_init(&m_xxs, &xxs_init);
           APP_ERROR_CHECK(err_code);
    
           // Initialize YYY Service.
           memset(&yys_init, 0, sizeof(yys_init));
           yys_init.evt_handler                  = on_yys_evt;
           yys_init.ble_yy_initial_value.counter = 0;
    
           err_code = ble_yy_service_init(&yys_init, &yy_init);
           APP_ERROR_CHECK(err_code);
         */
    }
    
    
    
    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;
        }
    }
    
    
    
    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);
        }
    }
    
    static void advertising_start(bool erase_bonds)
    {
        if (erase_bonds == true)
        {
            delete_bonds();
            // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
        }
        else
        {
            uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
            APP_ERROR_CHECK(err_code);
    
            NRF_LOG_DEBUG("advertising is started");
        }
    }

    same as the old one but change

     err_code = ble_dfu_buttonless_async_svci_init();

    under log_init();

    also 

    In sdk_config.h you will need to increase the NRF_SDH_BLE_VS_UUID_COUNT by 1 to accommodate the DFU service UUID which is a vendor-specific UUID. 

    we can edit the required change as mentioned in the degbug terminal.

    plus nrf_log_logging and NRF_LOG_BACKEND_RTT_ENABLED should be enable in sdk_config.h file.

    int main(void)
    {
    
        bool       erase_bonds;
        ret_code_t err_code;
    
      //
        APP_ERROR_CHECK(err_code);
    
    
    
    
        power_management_init();
        log_init();
    
    
        err_code = ble_dfu_buttonless_async_svci_init();
        timer_init();
        // Console start
        cli_uart_cfg();
        cli_uart_start();
    #if NRF_MODULE_ENABLED(CLI_RTT)
        cli_rtt_start();
    #endif // CLI_RTT
        ble_m_init();
        peer_manager_init();
        nfc_pairing_init();
    #if NRF_MODULE_ENABLED(ADAFRUIT_SHIELD)
        nfc_central_init();
    #endif // ADAFRUIT_SHIELD
        bond_get();
    
        NRF_LOG_RAW_INFO("BLE app with command line interface example started.\r\n");
        NRF_LOG_RAW_INFO("Press Tab to view all available commands.\r\n");
    
    
        APP_ERROR_CHECK(err_code);
    
        //timers_init();
       // power_management_init();
       // buttons_leds_init(&erase_bonds);
       // ble_stack_init();
        //peer_manager_init();
       // gap_params_init();
        //gatt_init();
       // advertising_init();
        services_init();
        //conn_params_init();
    
      //  NRF_LOG_INFO("Buttonless DFU Application started.");
    
        // Start execution.
        //application_timers_start();
       //advertising_start(erase_bonds);
    
    
    
    
        for (;;)
        {
            idle_state_handler();
        }
    }
    

    also giving upload the  sdk_config.h for future use or someone need it

    2251.sdk_config.h

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