C++ sptr::set_clock_source方法代码示例

void uhd_device::set_ref_clk(bool ext_clk)
{
	if (ext_clk)
		usrp_dev->set_clock_source("external");

	return;
}

    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));
    }

int setupUSRP(  uhd::usrp::multi_usrp::sptr&  usrp,
                const float                   center_freq,
                const float                   sample_rate,
                const int                     rx_gain,
                const char*                   dev_addr)
{
  //Initialize the USRP to the specified address
  usrp = uhd::usrp::multi_usrp::make(string(dev_addr));
  //Define the clock reference
  usrp->set_clock_source(__USRP_CLK_SRC);

  //Output some useful information
  cout  << "Using the following USRP device: " << endl
        << usrp->get_pp_string() << endl;

  //Try setting the sample rate.  If the rate we get is not the same as the
  //requested rate, we will return with a warning to ensure the user is aware
  //of the actual sample rate
  usrp->set_rx_rate( sample_rate );

  if( usrp->get_rx_rate() != sample_rate )
  {
    ios_base::fmtflags originalFlags = cout.flags();
    cout.setf(ios_base::left,ios_base::floatfield);
    cout.precision(15);
    cout  << "WARNING! Requested rate = " << sample_rate << endl
          << "WARNING! Actual rate = " << usrp->get_rx_rate() << endl;
    cout.setf(originalFlags);
  }

  //Try setting the center frequency.  Like above, if we get a different
  //frequency than the one we're requesting, we will spit out a warning for the
  //user
  usrp->set_rx_freq( center_freq );

  if( usrp->get_rx_freq() != center_freq )
  {
    ios_base::fmtflags originalFlags = cout.flags();
    cout.setf(ios_base::left,ios_base::floatfield);
    cout.precision(15);
    cout  << "WARNING! Requested frequency = " << center_freq << endl
          << "WARNING! Actual frequency = " << usrp->get_rx_freq() << endl;
    cout.setf(originalFlags);
  }

  //Set the RX gain.  There really shouldn't be any problems here, but the user
  //might request something silly like 50dB of gain when the module can't
  //accomodate.  So we'll perform a similar check here.
  usrp->set_rx_gain( rx_gain );

  if( usrp->get_rx_gain() != rx_gain )
  {
    cout  << "WARNING! Requested gain = " << rx_gain << endl
          << "WARNING! Actual gain = " << usrp->get_rx_gain() << endl;
  }

  //Ensure the LO locked
  vector<string> sensor_names;
  sensor_names = usrp->get_rx_sensor_names(0);
  if( find(sensor_names.begin(), sensor_names.end(), "lo_locked")
      != sensor_names.end() )
  {
    uhd::sensor_value_t lo_locked = usrp->get_rx_sensor("lo_locked",0);
    cout  << "Checking RX: " << endl
          << lo_locked.to_pp_string() << endl;
    UHD_ASSERT_THROW(lo_locked.to_bool());      //We should probably catch this
  }

  return 1;
}