Nordic 52832 修改蓝牙发射功率

1.功率范围

（最大）4dB、（默认）0dB、-4dB、-8dB、-12dB、-16dB、-20dB、-30dB、（最小）-40dB

2.功率 与 信号强度、功耗、传输距离 成正比

3.功率修改

static void advertising_init(void)
{
    uint32_t               err_code;
    ble_advertising_init_t init;
	uint8_t tx_power_level=-40;                         //功率定义

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

    init.advdata.name_type          = BLE_ADVDATA_FULL_NAME;
    init.advdata.include_appearance = false;
    init.advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
	init.advdata.p_tx_power_level = &tx_power_level;    //显示功率
	
    init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    init.srdata.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);

    //设置发射功率
	err_code =sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV,
                                m_advertising.adv_handle,tx_power_level);
	APP_ERROR_CHECK(err_code);
}

4.核心实现函数

SVCALL(SD_BLE_GAP_TX_POWER_SET, uint32_t, 
sd_ble_gap_tx_power_set(uint8_t role, uint16_t handle, int8_t tx_power));