添加廣播內容 和 動態廣播

添加廣播內容。這種直接把內容廣播出去，發現者不必連接就能獲取數據。

媒介一：通過 ble_advdata_manuf_data_t （廣播內容添加MAC地址）

媒介二：通過 ble_advdata_service_data_t  （添加動態廣播內容）

實現動態廣播的方法是：  廣播->停止廣播->修改參數->重啓廣播

程序實現：

#define APP_COMPANY_IDENTIFIER         0x4D48
#define ADVDATA_BUFFER_SIZE            6
static uint8_t  manuf_str[ADVDATA_BUFFER_SIZE] = {0};
static uint16_t manuf_str_len = 6;

#define SERVICE_UUID  0xB000
static uint8_t  service_str[4] = {1,2,3,4};
static uint16_t service_str_len = 4;

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;

    //get MAC
    ble_gap_addr_t gap_address;
    sd_ble_gap_address_get(&gap_address);
    manuf_str[0] = gap_address.addr[5];
    manuf_str[1] = gap_address.addr[4];
    manuf_str[2] = gap_address.addr[3];
    manuf_str[3] = gap_address.addr[2];
    manuf_str[4] = gap_address.addr[1];
    manuf_str[5] = gap_address.addr[0];

    ble_advdata_manuf_data_t   manuf_data;
    manuf_data.company_identifier = APP_COMPANY_IDENTIFIER;
    manuf_data.data.size = manuf_str_len;
    manuf_data.data.p_data = manuf_str;
    advdata.p_manuf_specific_data   = &manuf_data;

    ble_advdata_service_data_t service_data;
    service_data.service_uuid = SERVICE_UUID;
    service_data.data.p_data = service_str;
    service_data.data.size = service_str_len;
    advdata.p_service_data_array = &service_data;
    advdata.service_data_count = 1;//可以多個，下面介紹

    ble_advdata_t   scanrsp;
    memset(&scanrsp, 0, sizeof(scanrsp)); 
    scanrsp.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    scanrsp.uuids_complete.p_uuids  = m_adv_uuids;
    scanrsp.p_tx_power_level = &tx_power_level;

    ble_adv_modes_config_t options = {0};
    options.ble_adv_fast_enabled  = BLE_ADV_FAST_ENABLED;
    options.ble_adv_fast_interval = APP_ADV_INTERVAL;
    options.ble_adv_fast_timeout  = APP_ADV_TIMEOUT_IN_SECONDS;
    err_code = ble_advertising_init(&advdata, &scanrsp, &options, on_adv_evt, NULL);
    APP_ERROR_CHECK(err_code);

    service_str[3]++;//每次調用，數組最後一個加1

}

int main(void)
{
    uint32_t err_code;
    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
    ble_stack_init();
    gap_params_init();
    services_init();
    advertising_init();
    conn_params_init();
    err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
    APP_ERROR_CHECK(err_code);
    while(1)
    {
power_manage();
    }
}

運行程序，在手機nrf Master Control中可以發現廣播內容中多了 Manufacturer data 和 Service data

本實驗動態廣播通過按鍵事件觸發

每觸發一次按鍵事件，都發現Service data中的data[3]會加1

補充：廣播多個Service data 。由於直接廣播的數據只有 個，所以放到掃描迴應的方式廣播。

ble_advdata_service_data_t service_data[2];
service_data[0].service_uuid = SERVICE_UUID;
service_data[0].data.p_data = service_str;
service_data[0].data.size = service_str_len;
service_data[1].service_uuid = SERVICE_UUID;
service_data[1].data.p_data = service_str;
service_data[1].data.size = service_str_len;
scanrsp.p_service_data_array = service_data;
scanrsp.service_data_count = 2;