NRF51822之修改设备名(掉电不保存)

主要代码

/**@brief Function for handling the Application's BLE Stack events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 */
static void on_ble_evt(ble_evt_t * p_ble_evt)
{
    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;            
            break;

        case BLE_GAP_EVT_DISCONNECTED:
            
            m_conn_handle = BLE_CONN_HANDLE_INVALID; // Set connection handle to 0xFFFF                      
            advertising_init();//利用这个函数底层调用sd_ble_gap_device_name_get函数来获取设备名称
            advertising_start();
            break;
            
        case BLE_GAP_EVT_TIMEOUT:
            if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISING)
            {                
                advertising_start();
            }
            break;
            
        default:
            // No implementation needed.
            break;
    }
}

/**@brief Function for initializing the Advertising functionality.
 */
static void advertising_init(void)
{
    uint32_t      err_code;
    ble_advdata_t advdata;
    
    memset(&advdata, 0, sizeof(advdata));

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

    err_code = ble_advdata_set(&advdata,NULL);
    APP_ERROR_CHECK(err_code);
}




/**@brief Function for starting advertising.
 */
static void advertising_start(void)
{
    uint32_t             err_code;
    ble_gap_adv_params_t adv_params;
 
    // Start advertising
    memset(&adv_params, 0, sizeof(adv_params));

    adv_params.type        = BLE_GAP_ADV_TYPE_ADV_IND;
    adv_params.p_peer_addr = NULL;
    adv_params.fp          = BLE_GAP_ADV_FP_ANY;
    adv_params.interval    = APP_ADV_INTERVAL;
    adv_params.timeout     = APP_ADV_TIMEOUT_IN_SECONDS;

    err_code = sd_ble_gap_adv_start(&adv_params);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for stopping advertising.
 */
static void advertising_stop(void)
{
    uint32_t err_code;

    err_code = sd_ble_gap_adv_stop();
    APP_ERROR_CHECK(err_code);

}

需要注意的原来的广播中预留可以作为设备名的大小长度。

如果不想每次在 BLE_GAP_EVT_DISCONNECTED中 都进行一次advertising_init。只要有修改的时候继续的话

 

static volatile bool update_request = false;

static void devic_name_on_ble_evt(ble_evt_t * p_ble_evt)
{
    ble_gatts_evt_write_t * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write;
    
    if((p_evt_write->context.char_uuid.uuid == BLE_UUID_GAP_CHARACTERISTIC_DEVICE_NAME) \
        && (p_ble_evt->header.evt_id == BLE_GATTS_EVT_WRITE))
    {
        update_request = true;
    }
}


static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
{
    devic_name_on_ble_evt(p_ble_evt);
    ...
}

/**@brief Function for handling the Application's BLE Stack events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 */
static void on_ble_evt(ble_evt_t * p_ble_evt)
{
    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;            
            break;

        case BLE_GAP_EVT_DISCONNECTED:
            
            m_conn_handle = BLE_CONN_HANDLE_INVALID; // Set connection handle to 0xFFFF      
            if(update_request == true)
            {
                advertising_init();    
                update_request = false;
            }
            
            advertising_start();
            break;
            
        case BLE_GAP_EVT_TIMEOUT:
            if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISING)
            {                
                advertising_start();
            }
            break;
            
        default:
            // No implementation needed.
            break;
    }
}