/***********************************************************************
* Tune RX and TX routine
**********************************************************************/
static double tune_rx_and_tx(uhd::usrp::multi_usrp::sptr usrp, const double tx_lo_freq, const double rx_offset)
{
//tune the transmitter with no cordic
uhd::tune_request_t tx_tune_req(tx_lo_freq);
tx_tune_req.dsp_freq_policy = uhd::tune_request_t::POLICY_MANUAL;
tx_tune_req.dsp_freq = 0;
usrp->set_tx_freq(tx_tune_req);
//tune the receiver
double rx_freq = usrp->get_tx_freq() - rx_offset;
double min_fe_rx_freq = usrp->get_fe_rx_freq_range().start();
double max_fe_rx_freq = usrp->get_fe_rx_freq_range().stop();
uhd::tune_request_t rx_tune_req(rx_freq);
rx_tune_req.dsp_freq_policy = uhd::tune_request_t::POLICY_MANUAL;
rx_tune_req.dsp_freq = 0;
if (rx_freq < min_fe_rx_freq)
rx_tune_req.dsp_freq = rx_freq - min_fe_rx_freq;
else if (rx_freq > max_fe_rx_freq)
rx_tune_req.dsp_freq = rx_freq - max_fe_rx_freq;
usrp->set_rx_freq(rx_tune_req);
//wait for the LOs to become locked
boost::this_thread::sleep(boost::posix_time::milliseconds(50));
boost::system_time start = boost::get_system_time();
while (not usrp->get_tx_sensor("lo_locked").to_bool() or not usrp->get_rx_sensor("lo_locked").to_bool())
{
if (boost::get_system_time() > start + boost::posix_time::milliseconds(100))
throw std::runtime_error("timed out waiting for TX and/or RX LO to lock");
}
return usrp->get_tx_freq();
}
/***********************************************************************
* Tune RX and TX routine
**********************************************************************/
static double tune_rx_and_tx(
uhd::usrp::multi_usrp::sptr usrp, const double tx_lo_freq, const double rx_offset)
{
// tune the transmitter with no cordic
uhd::tune_request_t tx_tune_req(tx_lo_freq);
tx_tune_req.dsp_freq_policy = uhd::tune_request_t::POLICY_MANUAL;
tx_tune_req.dsp_freq = 0;
usrp->set_tx_freq(tx_tune_req);
// tune the receiver
double rx_freq = usrp->get_tx_freq() - rx_offset;
double min_fe_rx_freq = usrp->get_fe_rx_freq_range().start();
double max_fe_rx_freq = usrp->get_fe_rx_freq_range().stop();
uhd::tune_request_t rx_tune_req(rx_freq);
rx_tune_req.dsp_freq_policy = uhd::tune_request_t::POLICY_MANUAL;
rx_tune_req.dsp_freq = 0;
if (rx_freq < min_fe_rx_freq)
rx_tune_req.dsp_freq = rx_freq - min_fe_rx_freq;
else if (rx_freq > max_fe_rx_freq)
rx_tune_req.dsp_freq = rx_freq - max_fe_rx_freq;
usrp->set_rx_freq(rx_tune_req);
wait_for_lo_lock(usrp);
return usrp->get_tx_freq();
}
bool uhd_device::setTxFreq(double wFreq)
{
uhd::tune_result_t tr = usrp_dev->set_tx_freq(wFreq);
LOG(INFO) << "\n" << tr.to_pp_string();
tx_freq = usrp_dev->get_tx_freq();
return true;
}
/***********************************************************************
* Function to find optimal RX gain setting (for the current frequency)
**********************************************************************/
UHD_INLINE void set_optimal_rx_gain(
uhd::usrp::multi_usrp::sptr usrp,
uhd::rx_streamer::sptr rx_stream,
double wave_freq = 0.0)
{
const double gain_step = 3.0;
const double gain_compression_threshold = gain_step * 0.5;
const double actual_rx_rate = usrp->get_rx_rate();
const double actual_tx_freq = usrp->get_tx_freq();
const double actual_rx_freq = usrp->get_rx_freq();
const double bb_tone_freq = actual_tx_freq - actual_rx_freq + wave_freq;
const size_t nsamps = size_t(actual_rx_rate / default_fft_bin_size);
std::vector<samp_type> buff(nsamps);
uhd::gain_range_t rx_gain_range = usrp->get_rx_gain_range();
double rx_gain = rx_gain_range.start() + gain_step;
double curr_dbrms = 0.0;
double prev_dbrms = 0.0;
double delta = 0.0;
// No sense in setting the gain where this is no gain range
if (rx_gain_range.stop() - rx_gain_range.start() < gain_step)
return;
// The algorithm below cycles through the RX gain range
// looking for the point where the signal begins to get
// clipped and the gain begins to be compressed. It does
// this by looking for the gain setting where the increase
// in the tone is less than the gain step by more than the
// gain compression threshold (curr - prev < gain - threshold).
// Initialize prev_dbrms value
usrp->set_rx_gain(rx_gain);
capture_samples(usrp, rx_stream, buff, nsamps);
prev_dbrms = compute_tone_dbrms(buff, bb_tone_freq/actual_rx_rate);
rx_gain += gain_step;
// Find RX gain where signal begins to clip
while (rx_gain <= rx_gain_range.stop())
{
usrp->set_rx_gain(rx_gain);
capture_samples(usrp, rx_stream, buff, nsamps);
curr_dbrms = compute_tone_dbrms(buff, bb_tone_freq/actual_rx_rate);
delta = curr_dbrms - prev_dbrms;
// check if the gain is compressed beyone the threshold
if (delta < gain_step - gain_compression_threshold)
break; // if so, we are done
prev_dbrms = curr_dbrms;
rx_gain += gain_step;
}
// The rx_gain value at this point is the gain setting where clipping
// occurs or the gain setting that is just beyond the gain range.
// The gain is reduced by 2 steps to make sure it is within the range and
// under the point where it is clipped with enough room to make adjustments.
rx_gain -= 2 * gain_step;
// Make sure the gain is within the range.
rx_gain = rx_gain_range.clip(rx_gain);
// Finally, set the gain.
usrp->set_rx_gain(rx_gain);
}
void get_tx_parameters(uhd::usrp::multi_usrp::sptr usrp, size_t mboard, std::ostream & os)
{
using namespace std;
namespace radio = uhd::usrp;
size_t nchan = 0;
// CONFIGURATION SUB_DEVICE
os << std::endl << "********** TX Sub Device ***********" << std::endl;
// Get sub device specification
os << std::endl << "-----> Get TX Subdevice" << std::endl;
try
{
os << "TX Subdevice Specification: ";
radio::subdev_spec_t tx_subdev = usrp->get_tx_subdev_spec(mboard);
os << tx_subdev.to_pp_string() << endl;
}
catch(uhd::runtime_error &e)
{
os << " Exception occurred : " << e.code() << endl;
}
// Number of tx channels
os << std::endl << "-----> Get number of TX channels" << std::endl;
try
{
size_t num_tx = usrp->get_tx_num_channels();
os << "Number of TX channels: " ;
os << num_tx << endl;
}
catch (uhd::runtime_error &e)
{
os << " Exception occurred : " << e.code() << endl;
}
// TX Device Name
os << std::endl << "-----> Get TX Subdevice Name" << std::endl;
try
{
os << "TX Subdevice Name: ";
string tx_name = usrp->get_tx_subdev_name(nchan);
os << tx_name << endl;
}
catch (uhd::runtime_error &e)
{
os << " Exception occurred : " << e.code() << endl;
}
// TX SAMPLE RATE
os << std::endl << "********** TX Sample Rate ***********" << std::endl;
// Get Current TX rate
os << std::endl << "-----> Get TX Rate" << std::endl;
try
{
os << "TX Rate: " ;
double tx_rate = usrp->get_tx_rate(nchan);
os << tx_rate << endl;
}
catch (uhd::runtime_error &e)
{
os << " Exception occurred : " << e.code() << endl;
}
// Get list of TX rates
os << std::endl << "-----> Get TX Rate List" << std::endl;
try
{
os << "TX Rate List: " ;
uhd::meta_range_t tx_rates = usrp->get_tx_rates(nchan);
os << "Start: " << tx_rates.start() << " Stop: " << tx_rates.stop() << " Step: " << tx_rates.step() << endl;
os << tx_rates.to_pp_string() << endl;
}
catch (uhd::runtime_error &e)
{
os << " Exception occurred : " << e.code() << endl;
}
// TX FREQUENCIES
os << std::endl << "********** TX Frequencies ***********" << std::endl;
// Current TX frequency
os << std::endl << "-----> Get TX Center Frequency" << std::endl;
try
{
os << "TX Freq: ";
double tx_freq = usrp->get_tx_freq(nchan);
os << tx_freq << endl;
}
catch (uhd::runtime_error &e)
{
os << " Exception occurred : " << e.code() << endl;
}
// TX Frequency Range
os << std::endl << "-----> Get TX Center Frequency Range" << std::endl;
try
{
os << "TX Frequency Range: ";
uhd::freq_range_t tx_freq_range = usrp->get_tx_freq_range(nchan);
os << "Start: " << tx_freq_range.start() << " Stop: " << tx_freq_range.stop() << " Step: " << tx_freq_range.step() << endl;
os << tx_freq_range.to_pp_string() << endl;
}
catch (uhd::runtime_error &e)
{
os << " Exception occurred : " << e.code() << endl;
}
// Front end TX frequency range
os << std::endl << "-----> Get TX RF Front End Center Frequency Range" << std::endl;
try
{
os << "TX Front End Frequency Range: ";
uhd::freq_range_t tx_fe_freq_range = usrp->get_fe_tx_freq_range(nchan);
os << "Start: " << tx_fe_freq_range.start() << " Stop: " << tx_fe_freq_range.stop() << " Step: " << tx_fe_freq_range.step() << endl;
os << tx_fe_freq_range.to_pp_string() << endl;
}
catch (uhd::runtime_error &e)
{
os << " Exception occurred : " << e.code() << endl;
}
// TX GAIN
os << std::endl << "********** TX Gain ***********" << std::endl;
// Total combined gain
os << endl << "-----> Get TX Total Gain" << endl;
os << "TX Total Gain: " ;
try
{
double tx_total_gain = usrp->get_tx_gain(nchan);
os << tx_total_gain << endl;
}
catch(uhd::runtime_error &e)
{
os << "Exception code: " << e.code() << endl;
}
// List of all gain elements
os << std::endl << "-----> Get TX gain names" << std::endl;
std::vector<std::string> tx_gain_names = usrp->get_tx_gain_names(nchan);
os << "Tx Gain Names: " << std::endl;
for (int index =0; index < tx_gain_names.size(); index++)
{
// Name
os << "\t" << tx_gain_names[index] << endl;
}
for (int index =0; index < tx_gain_names.size(); index++)
{
// Name
os << "\t" << "Name: " << tx_gain_names[index] << " Value: ";
// Value
try
{
double element_gain = usrp->get_tx_gain(tx_gain_names[index], nchan);
os << element_gain << endl;
}
catch(uhd::runtime_error &e)
{
os << "Exception code while getting value: " << e.code() << endl;
}
}
// Gain ranges for each of the gain elements
os << std::endl << "-----> Get TX element gain ranges" << std::endl;
for (int index =0; index < tx_gain_names.size(); index++)
{
// Name
os << "\t" << "Name: " << tx_gain_names[index] << " Value: ";
// Value
try
{
uhd::gain_range_t element_gain_range = usrp->get_tx_gain_range(tx_gain_names[index], nchan);
os << "Start: " << element_gain_range.start() << " End: " << element_gain_range.stop() << " Step: " << element_gain_range.step() << endl;
}
catch(uhd::runtime_error &e)
{
os << "Exception code while getting value: " << e.code() << endl;
}
}
// Total Gain range
try
{
os << endl << "-----> Get TX Total Gain Range" << endl;
uhd::gain_range_t tx_total_gain_range = usrp->get_tx_gain_range(nchan);
os << "TX Total Gain Range: " ;
os << "Start: " << tx_total_gain_range.start() << " End: " << tx_total_gain_range.stop() << " Step: " << tx_total_gain_range.step() << endl;
}
catch(uhd::runtime_error &e)
{
os << "Exception code: " << e.code() <<endl;
}
// ANTENNA FUNCTIONS
os << std::endl << "********** TX ANTENNA ***********" << std::endl;
// Current Tx Antenna
os << std::endl << "-----> Get TX Antenna" << std::endl;
try
{
os << "TX Antenna: " ;
string tx_antenna = usrp->get_tx_antenna(nchan);
os << tx_antenna << endl;
}
catch(uhd::runtime_error &e)
{
os << "Exception code: " << e.code() <<endl;
}
// TX Antenna choices
os << std::endl << "-----> Get Tx Antenna List" << std::endl;
try
{
os << "TX Antennas : " << std::endl;
std::vector<std::string> tx_antennas = usrp->get_tx_antennas(nchan);
for (int index =0; index < tx_antennas.size(); index++)
os << "\t" << tx_antennas[index] << std::endl;
}
catch(uhd::runtime_error &e)
{
os << "Exception code: " << e.code() <<endl;
}
// TX BANDWIDTH FUNCTIONS
os << std::endl << "********** TX BANDWIDTH ***********" << std::endl;
// Current TX Bandwidth
os << endl << "-----> Get TX Bandwidth" << endl;
try
{
os << "TX Bandwidth " ;
double tx_bandwidth = usrp->get_tx_bandwidth(nchan);
os << tx_bandwidth << endl;
}
catch (uhd::runtime_error &e)
{
os << "Exception occured " << e.code() << endl;
}
// TX Bandwidth Range
os << endl << "-----> Get TX Bandwidth Range" << endl;
try
{
os << "TX Bandwidth Range: " ;
uhd::gain_range_t tx_bandwidth_range = usrp->get_tx_bandwidth_range(nchan);
os << "Start: " << tx_bandwidth_range .start() << " End: " << tx_bandwidth_range .stop() << " Step: " << tx_bandwidth_range .step() << endl;
}
catch(uhd::runtime_error &e)
{
os << "Exception code: " << e.code() <<endl;
}
// TX DBOARD INTERFACE OBJECT
os << std::endl << "********** TX DBOARD INTERFACE ***********" << std::endl;
// TX Dboard Interface
os << endl << "-----> Get tx_dboard_iface()" << endl;
try
{
os << "TX Dboard Interface " ;
uhd::usrp::dboard_iface::sptr tx_dboard_iface = usrp->get_tx_dboard_iface(nchan);
os << tx_dboard_iface << endl;
}
catch (uhd::runtime_error &e)
{
os << "Exception occured " << e.code() << endl;
}
// TX _SENSORS
os << std::endl << "********** TX Sensors ***********" << std::endl;
// List of all available sensors
os << std::endl << "-----> Get TX Sensors Name" << std::endl;
std::vector<std::string> tx_sensor_names = usrp->get_tx_sensor_names(nchan);
os << "Sensor Names: " << std::endl;
for (int index =0; index < tx_sensor_names.size(); index++)
{
// Name
os << "\t" << tx_sensor_names[index] << ": ";
// Value
try
{
uhd::sensor_value_t tx_sensor_value = usrp->get_tx_sensor(tx_sensor_names[index], nchan);
os << tx_sensor_value.to_pp_string()<< std::endl;
}
catch(uhd::runtime_error &e)
{
os << "Exception occured " << e.code() << endl;
}
}
}