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  • NRF51822之发射功率

    设置蓝牙的TX Power

    使用的函数sd_ble_gap_tx_power_set(int8_t tx_power);

     
    参看例子为 S110/ble_app_proximity
    #define TX_POWER_LEVEL                      (4)                                              /**< TX Power Level value. This will be set both in the TX Power service, in the advertising data, and also used to set the radio transmit power. */
     
    static void gap_params_init(void)
    {
        uint32_t                err_code;
        ble_gap_conn_params_t   gap_conn_params;
        ble_gap_conn_sec_mode_t sec_mode;
    
        BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
       
        err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *)DEVICE_NAME, strlen(DEVICE_NAME));
        APP_ERROR_CHECK(err_code);
    
        err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_GENERIC_KEYRING);
        APP_ERROR_CHECK(err_code);
       
        memset(&gap_conn_params, 0, sizeof(gap_conn_params));
    
        gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
        gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
        gap_conn_params.slave_latency     = SLAVE_LATENCY;
        gap_conn_params.conn_sup_timeout  = CONN_SUP_TIMEOUT;
    
        err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
        APP_ERROR_CHECK(err_code);
    
        err_code = sd_ble_gap_tx_power_set(TX_POWER_LEVEL);
        APP_ERROR_CHECK(err_code);
    }

    可以设置的输出的功率为 accepted values are -40, -30, -20, -16, -12, -8, -4, 0, and 4 dBm

    /**@brief Set the radio's transmit power.
    *
    * @param[in] tx_power Radio transmit power in dBm (accepted values are -40, -30, -20, -16, -12, -8, -4, 0, and 4 dBm).
    *
    * @note -40 dBm will not actually give -40 dBm, but will instead be remapped to -30 dBm.
    *
    * @return @ref NRF_SUCCESS Successfully changed the transmit power.
    * @return @ref NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied.
    * @return @ref NRF_ERROR_BUSY The stack is busy, process pending events and retry.
    */
    SVCALL(SD_BLE_GAP_TX_POWER_SET, uint32_t, sd_ble_gap_tx_power_set(int8_t tx_power));
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  • 原文地址:https://www.cnblogs.com/libra13179/p/5377107.html
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