- 两种广播模式，一种短广播间隔并且可连接，一种长广播间隔并且不可连接。
- 长广播间隔可以更新广播数据。
- 有限发现模式 BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE 的两个关键宏定义：BLE_GAP_ADV_TIMEOUT_LIMITED_MAX（182 秒） 、BLE_GAP_ADV_TIMEOUT_HIGH_DUTY_MAX（1.28秒）
#define APP_COMPANY_IDENTIFIER 0x0201 /* Bluetooth sig company identifier */
#define APP_ADVERTISING_INFO_LENGTH 16
#define ADV_ENCODED_AD_TYPE_LEN 1 /**< Length of encoded ad type in advertisement data. */
#define ADV_ENCODED_AD_TYPE_LEN_LEN 1 /**< Length of the 'length field' of each ad type in advertisement data. */
#define ADV_FLAGS_LEN 1 /**< Length of flags field that will be placed in advertisement data. */
#define ADV_ENCODED_FLAGS_LEN (ADV_ENCODED_AD_TYPE_LEN + \
ADV_ENCODED_AD_TYPE_LEN_LEN + \
ADV_FLAGS_LEN) /**< Length of flags field in advertisement packet. (1 byte for encoded ad type plus 1 byte for length of flags plus the length of the flags itself). */
#define ADV_ENCODED_COMPANY_ID_LEN 2 /**< Length of the encoded Company Identifier in the Manufacturer Specific Data part of the advertisement data. */
#define ADV_ADDL_MANUF_DATA_LEN (APP_CFG_ADV_DATA_LEN - \
( \
ADV_ENCODED_FLAGS_LEN + \
( \
ADV_ENCODED_AD_TYPE_LEN + \
ADV_ENCODED_AD_TYPE_LEN_LEN + \
ADV_ENCODED_COMPANY_ID_LEN \
) \
) \
) /**< Length of Manufacturer Specific Data field that will be placed on the air during advertisement. This is computed based on the value of APP_CFG_ADV_DATA_LEN (required advertisement data length). */
#define CONNECTABLE_ADV_INTERVAL MSEC_TO_UNITS(400, UNIT_0_625_MS)
#define CONNECTABLE_ADV_DURATION 0
static uint8_t m_advertising_info[APP_ADVERTISING_INFO_LENGTH] = {0};
static ble_gap_adv_params_t m_adv_params; /**< Parameters to be passed to the stack when starting advertising. */
static uint8_t m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET; /**< Advertising handle used to identify an advertising set. */
static uint8_t m_enc_advdata[BLE_GAP_ADV_SET_DATA_SIZE_MAX]; /**< Buffer for storing an encoded advertising set. */
static bool m_is_non_connectable_mode = true;
bool now_is_connectable_mode(void)
{
return (m_is_non_connectable_mode == false);
}
/**@brief Struct that contains pointers to the encoded advertising data. */
static ble_gap_adv_data_t m_adv_data =
{
.adv_data =
{
.p_data = m_enc_advdata,
.len = BLE_GAP_ADV_SET_DATA_SIZE_MAX
},
.scan_rsp_data =
{
.p_data = NULL,
.len = 0
}
};
/**@brief Function for initializing the connectable advertisement parameters.
*
* @details This function initializes the advertisement parameters to values that will put
* the application in connectable mode.
*
*/
static void connectable_adv_init(void)
{
// Initialize advertising parameters (used when starting advertising).
memset(&m_adv_params, 0, sizeof(m_adv_params));
m_adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
m_adv_params.duration = CONNECTABLE_ADV_DURATION;
m_adv_params.p_peer_addr = NULL;
m_adv_params.filter_policy = BLE_GAP_ADV_FP_ANY;
m_adv_params.interval = CONNECTABLE_ADV_INTERVAL;
m_adv_params.primary_phy = BLE_GAP_PHY_1MBPS;
}
/**@brief Function for initializing the non-connectable advertisement parameters.
*
* @details This function initializes the advertisement parameters to values that will put
* the application in non-connectable mode.
*
*/
static void non_connectable_adv_init(void)
{
// Initialize advertising parameters (used when starting advertising).
memset(&m_adv_params, 0, sizeof(m_adv_params));
m_adv_params.properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_SCANNABLE_UNDIRECTED;
m_adv_params.duration = BLE_GAP_ADV_TIMEOUT_LIMITED_MAX ;
m_adv_params.p_peer_addr = NULL;
m_adv_params.filter_policy = BLE_GAP_ADV_FP_ANY;
m_adv_params.interval = MSEC_TO_UNITS(4000, UNIT_0_625_MS);
m_adv_params.primary_phy = BLE_GAP_PHY_1MBPS;
}
#if 1
/**@brief Function for initializing the Advertisement packet.
*
* @details This function initializes the data that is to be placed in an advertisement packet in
* both connectable and non-connectable modes.
*
*/
static void advertising_init(void)
{
ret_code_t err_code;
ble_advdata_t advdata;
ble_advdata_manuf_data_t manuf_data;
uint8_t flags;
APP_ERROR_CHECK_BOOL(sizeof(flags) == ADV_FLAGS_LEN); // Assert that these two values of the same.
if(now_is_connectable_mode())
{
flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
}
else
{
flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
}
// Build and set advertising data is here
memset(&advdata, 0, sizeof(advdata));
manuf_data.company_identifier = APP_COMPANY_IDENTIFIER;
manuf_data.data.size = APP_ADVERTISING_INFO_LENGTH;
manuf_data.data.p_data = m_advertising_info;
advdata.name_type = BLE_ADVDATA_FULL_NAME;
advdata.include_appearance = false;
advdata.flags = flags;
advdata.p_manuf_specific_data = &manuf_data;
err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data, &m_adv_data.adv_data.len);
if(err_code) { NRF_LOG_INFO("ble_advdata_encode: %d", err_code); }
APP_ERROR_CHECK(err_code);
err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &m_adv_params);
if(err_code) { NRF_LOG_INFO("sd_ble_gap_adv_set_configure: %d", err_code); }
APP_ERROR_CHECK(err_code);
}
/**@brief Function for starting advertising.
*/
void advertising_start(void)
{
ret_code_t err_code;
err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG);
if(err_code) { NRF_LOG_INFO("sd_ble_gap_adv_start: %d", err_code); }
APP_ERROR_CHECK(err_code);
}
/**@brief Function for stop advertising.
*/
void advertising_stop(void)
{
uint32_t err_code = sd_ble_gap_adv_stop(m_adv_handle);
if(err_code) { NRF_LOG_INFO("sd_ble_gap_adv_stop: %d", err_code); }
APP_ERROR_CHECK(err_code);
}
void advertising_update(void)
{
if(now_is_connectable_mode())
{
connectable_adv_init();
}
else
{
non_connectable_adv_init();
}
advertising_init();
}