NRF51822之动态广播使用
本教程基于nRF51_SDK_10.0.0_dc26b5e\examples\ble_peripheral\ble_app_uart工程
本教程主要是演示
现在演示通过nus来修改ADV中maufacturer data,在disconnect后我们可以看到广播中maufacturer data更新为我们在nus中配置的
在工程增加新代码
#define APP_COMPANY_IDENTIFIER 0x0059 /**< Company identifier for Nordic Semiconductor ASA. as per www.bluetooth.org. */
#define DEFAULT_ADVDATA "libra"
#define ADVDATA_BUFFER_SIZE 24
// advertisement data string
static uint8_t advert_str[ADVDATA_BUFFER_SIZE] = DEFAULT_ADVDATA;
static uint16_t adv_str_len = 5;
static volatile bool update_request = false;
// configure advertisements
void adverts_init(void)
{
uint32_t err_code;
ble_advdata_t advdata;
ble_advdata_t scanrsp;
ble_advdata_manuf_data_t manuf_data;
memset(&advdata, 0, sizeof(advdata));
memset(&scanrsp, 0, sizeof(scanrsp));
manuf_data.company_identifier = APP_COMPANY_IDENTIFIER;
manuf_data.data.p_data = advert_str;
manuf_data.data.size = adv_str_len;
advdata.name_type = BLE_ADVDATA_FULL_NAME;
advdata.include_appearance = false;
advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
advdata.p_manuf_specific_data = &manuf_data;
err_code = ble_advdata_set(&advdata,NULL);
APP_ERROR_CHECK(err_code);
}
// start advertising
void adverts_start(void)
{
uint32_t err_code;
ble_gap_adv_params_t adv_params;
memset(&adv_params, 0, sizeof(adv_params));
//设置广播信道是否开启
adv_params.channel_mask.ch_37_off = 0;
adv_params.channel_mask.ch_38_off = 0;
adv_params.channel_mask.ch_39_off = 0;
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;
adv_params.p_whitelist = NULL;
err_code = sd_ble_gap_adv_start(&adv_params);
APP_ERROR_CHECK(err_code);
}
// check connection state
bool is_connected(void)
{
return (m_conn_handle != BLE_CONN_HANDLE_INVALID);
}
// update advertised data
void adverts_update(uint8_t * adv_str, uint16_t len)
{
if (len > ADVDATA_BUFFER_SIZE) len = ADVDATA_BUFFER_SIZE;
memcpy(advert_str, adv_str, len);
adv_str_len = len;
update_request = true;
}
void adverts_update_check(void)
{
if((update_request)&&(!is_connected()))
{
update_request = false;
sd_ble_gap_adv_stop();
adverts_init();
adverts_start();
}
}
修改工程原来的代码
static void nus_data_handler(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length)
{
for (uint32_t i = 0; i < length; i++)
{
while(app_uart_put(p_data[i]) != NRF_SUCCESS);
}
while(app_uart_put('\n') != NRF_SUCCESS);
////////////////////////////////////////////////////////////////////////
adverts_update(p_data,length);
////////////////////////////////////////////////////////////////////////
}
static void on_ble_evt(ble_evt_t * p_ble_evt)
{
...
case BLE_GAP_EVT_DISCONNECTED:
err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);
m_conn_handle = BLE_CONN_HANDLE_INVALID;
//////////////////////////////////////////////////////////////
adverts_update_check();
/////////////////////////////////////////////////////////////////
break;
...
}
/**@brief Application main function.
*/
int main(void)
{
uint32_t err_code;
bool erase_bonds;
uint8_t start_string[] = START_STRING;
// Initialize.
APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false);
uart_init();
buttons_leds_init(&erase_bonds);
ble_stack_init();
gap_params_init();
services_init();
// advertising_init();
adverts_init();
conn_params_init();
printf("%s",start_string);
// err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
// APP_ERROR_CHECK(err_code);
adverts_start();
// Enter main loop.
for (;;)
{
power_manage();
}
}