NRF52843主机和从机的参数

1.主机参数

// 作为主机时扫描外围设备的参数
static ble_gap_scan_params_t m_scan_param =                 /**< Scan parameters requested for scanning and connection. */
{
    .active        = 0x01,
    .interval      = NRF_BLE_SCAN_SCAN_INTERVAL,    // 扫描间隔
    .window        = NRF_BLE_SCAN_SCAN_WINDOW,      // 扫描窗口
    .filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,
    .timeout       = NRF_BLE_SCAN_SCAN_DURATION,
    .scan_phys     = BLE_GAP_PHY_1MBPS,             // PYH的速率
    .extended      = true,
};

// 作为主机连接时的参数
typedef struct
{
  uint16_t min_conn_interval;         /**< Minimum Connection Interval in 1.25 ms units, see @ref BLE_GAP_CP_LIMITS.*/
  uint16_t max_conn_interval;         /**< Maximum Connection Interval in 1.25 ms units, see @ref BLE_GAP_CP_LIMITS.*/
  uint16_t slave_latency;             /**< Slave Latency in number of connection events, see @ref BLE_GAP_CP_LIMITS.*/
  uint16_t conn_sup_timeout;          /**< Connection Supervision Timeout in 10 ms units, see @ref BLE_GAP_CP_LIMITS.*/
} ble_gap_conn_params_t;

/**@brief Function for setting the default connection parameters.
 *
 * @param[out] p_scan_ctx    Pointer to the Scanning Module instance.
 */
static void nrf_ble_scan_default_conn_param_set(nrf_ble_scan_t * const p_scan_ctx)
{
    p_scan_ctx->conn_params.conn_sup_timeout =
        (uint16_t)MSEC_TO_UNITS(NRF_BLE_SCAN_SUPERVISION_TIMEOUT, UNIT_10_MS);
    p_scan_ctx->conn_params.min_conn_interval =
        (uint16_t)MSEC_TO_UNITS(NRF_BLE_SCAN_MIN_CONNECTION_INTERVAL, UNIT_1_25_MS);
    p_scan_ctx->conn_params.max_conn_interval =
        (uint16_t)MSEC_TO_UNITS(NRF_BLE_SCAN_MAX_CONNECTION_INTERVAL, UNIT_1_25_MS);
    p_scan_ctx->conn_params.slave_latency =
        (uint16_t)NRF_BLE_SCAN_SLAVE_LATENCY;
}

2.从机参数

// 作为从机时的广播参数
/**@brief Function for initializing the advertising functionality.
 */
static void advertising_init(void)
{
    ret_code_t             err_code;
    ble_advertising_init_t init;

    memset(&init, 0, sizeof(init));

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

    init.config.ble_adv_fast_enabled  = true;
    init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
    init.config.ble_adv_fast_timeout  = APP_ADV_DURATION;

    init.evt_handler = on_adv_evt;

    err_code = ble_advertising_init(&m_advertising, &init);
    APP_ERROR_CHECK(err_code);

    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}