C++ sptr::set_tx_gain方法代码示例

/***********************************************************************
 * Set standard defaults for devices
 **********************************************************************/
static inline void set_optimum_defaults(uhd::usrp::multi_usrp::sptr usrp){
    uhd::property_tree::sptr tree = usrp->get_device()->get_tree();
    // Will work on 1st subdev, top-level must make sure it's the right one
    uhd::usrp::subdev_spec_t subdev_spec = usrp->get_rx_subdev_spec();

    const uhd::fs_path mb_path = "/mboards/0";
    const std::string mb_name = tree->access<std::string>(mb_path / "name").get();
    if (mb_name.find("USRP2") != std::string::npos or mb_name.find("N200") != std::string::npos or mb_name.find("N210") != std::string::npos  or mb_name.find("X300") != std::string::npos  or mb_name.find("X310") != std::string::npos){
        usrp->set_tx_rate(12.5e6);
        usrp->set_rx_rate(12.5e6);
    }
    else if (mb_name.find("B100") != std::string::npos){
        usrp->set_tx_rate(4e6);
        usrp->set_rx_rate(4e6);
    }
    else if (mb_name.find("E100") != std::string::npos or mb_name.find("E110") != std::string::npos){
        usrp->set_tx_rate(4e6);
        usrp->set_rx_rate(8e6);
    }
    else{
        throw std::runtime_error("self-calibration is not supported for this hardware");
    }

    const uhd::fs_path tx_fe_path = "/mboards/0/dboards/" + subdev_spec[0].db_name + "/tx_frontends/0";
    const std::string tx_name = tree->access<std::string>(tx_fe_path / "name").get();
    if (tx_name.find("WBX") != std::string::npos){
        usrp->set_tx_gain(0);
    }
    else if (tx_name.find("SBX") != std::string::npos){
        usrp->set_tx_gain(0);
    }
    else if (tx_name.find("CBX") != std::string::npos){
        usrp->set_tx_gain(0);
    }
    else if (tx_name.find("RFX") != std::string::npos){
        usrp->set_tx_gain(0);
    }
    else{
        throw std::runtime_error("self-calibration is not supported for this hardware");
    }

    const uhd::fs_path rx_fe_path = "/mboards/0/dboards/" + subdev_spec[0].db_name + "/rx_frontends/0";
    const std::string rx_name = tree->access<std::string>(rx_fe_path / "name").get();
    if (rx_name.find("WBX") != std::string::npos){
        usrp->set_rx_gain(25);
    }
    else if (rx_name.find("SBX") != std::string::npos){
        usrp->set_rx_gain(25);
    }
    else if (rx_name.find("CBX") != std::string::npos){
        usrp->set_rx_gain(25);
    }
    else if (rx_name.find("RFX") != std::string::npos){
        usrp->set_rx_gain(25);
    }
    else{
        throw std::runtime_error("self-calibration is not supported for this hardware");
    }

}

/***********************************************************************
 * Transmit thread
 **********************************************************************/
static void tx_thread(uhd::usrp::multi_usrp::sptr usrp, const double tx_wave_freq, const double tx_wave_ampl)
{
    uhd::set_thread_priority_safe();

    // set max TX gain
    usrp->set_tx_gain(usrp->get_tx_gain_range().stop());

    //create a transmit streamer
    uhd::stream_args_t stream_args("fc32"); //complex floats
    uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);

    //setup variables and allocate buffer
    uhd::tx_metadata_t md;
    md.has_time_spec = false;
    std::vector<samp_type> buff(tx_stream->get_max_num_samps()*10);

    //values for the wave table lookup
    size_t index = 0;
    const double tx_rate = usrp->get_tx_rate();
    const size_t step = boost::math::iround(wave_table_len * tx_wave_freq / tx_rate);
    wave_table table(tx_wave_ampl);

    //fill buff and send until interrupted
    while (not boost::this_thread::interruption_requested())
    {
        for (size_t i = 0; i < buff.size(); i++)
            buff[i] = table(index += step);
        tx_stream->send(&buff.front(), buff.size(), md);
    }

    //send a mini EOB packet
    md.end_of_burst = true;
    tx_stream->send("", 0, md);
}

double uhd_device::setTxGain(double db)
{
	usrp_dev->set_tx_gain(db);
	tx_gain = usrp_dev->get_tx_gain();

	LOG(INFO) << "Set TX gain to " << tx_gain << "dB";

	return tx_gain;
}

int setup_device(uhd::usrp::multi_usrp::sptr usrp, double rx_gain, double tx_gain, double freq, double rate){

    //create a usrp device
    std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;

    usrp->set_rx_rate(rate);
    usrp->set_rx_freq(freq);
    usrp->set_rx_gain(rx_gain);
	usrp->set_tx_rate(rate);
	usrp->set_tx_freq(freq);
	usrp->set_tx_gain(tx_gain);

}

    Uhd(const std::vector<size_t> channels, const double tx_rate, const double tx_center_freq, const double tx_gain)
    {
        uhd::set_thread_priority_safe();

        for(const auto ch : channels)
        {
            usrp = uhd::usrp::multi_usrp::make(std::string(""));
            usrp->set_clock_source("internal");
            usrp->set_tx_rate(tx_rate, ch);
            usrp->set_tx_freq(uhd::tune_request_t(tx_center_freq), ch);
            usrp->set_tx_gain(tx_gain, ch);
        }
        usrp->set_time_now(uhd::time_spec_t(0.0));
    }

void uhd_device::init_gains()
{
	uhd::gain_range_t range;

	range = usrp_dev->get_tx_gain_range();
	tx_gain_min = range.start();
	tx_gain_max = range.stop();

	range = usrp_dev->get_rx_gain_range();
	rx_gain_min = range.start();
	rx_gain_max = range.stop();

	usrp_dev->set_tx_gain((tx_gain_min + tx_gain_max) / 2);
	usrp_dev->set_rx_gain((rx_gain_min + rx_gain_max) / 2);

	tx_gain = usrp_dev->get_tx_gain();
	rx_gain = usrp_dev->get_rx_gain();

	return;
}