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gnss-sdr/src/algorithms/signal_source/adapters/uhd_signal_source.cc

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/*!
* \file uhd_signal_source.cc
* \brief Universal Hardware Driver signal source
* \author Javier Arribas, 2012. jarribas(at)cttc.es
*
* -----------------------------------------------------------------------------
*
* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
* This file is part of GNSS-SDR.
*
* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
* SPDX-License-Identifier: GPL-3.0-or-later
*
* -----------------------------------------------------------------------------
*/
#include "uhd_signal_source.h"
#include "GPS_L1_CA.h"
#include "configuration_interface.h"
#include "gnss_sdr_string_literals.h"
#include "gnss_sdr_valve.h"
#include <glog/logging.h>
#include <uhd/exception.hpp>
#include <uhd/types/device_addr.hpp>
#include <volk/volk.h>
#include <iostream>
#include <utility>
using namespace std::string_literals;
UhdSignalSource::UhdSignalSource(const ConfigurationInterface* configuration,
const std::string& role, unsigned int in_stream, unsigned int out_stream,
Concurrent_Queue<pmt::pmt_t>* queue)
: SignalSourceBase(configuration, role, "UHD_Signal_Source"s), in_stream_(in_stream), out_stream_(out_stream)
{
// DUMP PARAMETERS
const std::string empty;
const std::string default_dump_file("./data/signal_source.dat");
const std::string default_item_type("cshort");
// UHD COMMON PARAMETERS
uhd::device_addr_t dev_addr;
device_address_ = configuration->property(role + ".device_address", empty);
// When left empty, the device discovery routines will search all
// available transports on the system (ethernet, usb...).
// To narrow down the discovery process to a particular device,
// specify a transport key/value pair specific to your device.
if (empty != device_address_) // if not empty
{
dev_addr["addr"] = device_address_;
}
// filter the device by serial number if required (useful for USB devices)
std::string device_serial = configuration->property(role + ".device_serial", empty);
if (empty != device_serial) // if not empty
{
dev_addr["serial"] = device_serial;
}
subdevice_ = configuration->property(role + ".subdevice", empty);
clock_source_ = configuration->property(role + ".clock_source", std::string("internal"));
RF_channels_ = configuration->property(role + ".RF_channels", 1);
sample_rate_ = configuration->property(role + ".sampling_frequency", 4.0e6);
item_type_ = configuration->property(role + ".item_type", default_item_type);
if (RF_channels_ == 1)
{
// Single RF channel UHD operation (backward compatible config file format)
samples_.push_back(configuration->property(role + ".samples", 0));
dump_.push_back(configuration->property(role + ".dump", false));
dump_filename_.push_back(configuration->property(role + ".dump_filename", default_dump_file));
freq_.push_back(configuration->property(role + ".freq", GPS_L1_FREQ_HZ));
gain_.push_back(configuration->property(role + ".gain", 50.0));
IF_bandwidth_hz_.push_back(configuration->property(role + ".IF_bandwidth_hz", sample_rate_ / 2));
}
else
{
// multiple RF channels selected
for (int i = 0; i < RF_channels_; i++)
{
// Single RF channel UHD operation (backward compatible config file format)
samples_.push_back(configuration->property(role + ".samples" + std::to_string(i), 0));
dump_.push_back(configuration->property(role + ".dump" + std::to_string(i), false));
dump_filename_.push_back(configuration->property(role + ".dump_filename" + std::to_string(i), default_dump_file));
freq_.push_back(configuration->property(role + ".freq" + std::to_string(i), GPS_L1_FREQ_HZ));
gain_.push_back(configuration->property(role + ".gain" + std::to_string(i), 50.0));
IF_bandwidth_hz_.push_back(configuration->property(role + ".IF_bandwidth_hz" + std::to_string(i), sample_rate_ / 2));
}
}
// 1. Make the uhd driver instance
// uhd_source_= uhd::usrp::multi_usrp::make(dev_addr);
// single source
// param: device_addr the address to identify the hardware
// param: io_type the desired output data type
// fc64: Complex floating point (64-bit floats) range [-1.0, +1.0].
// fc32: Complex floating point (32-bit floats) range [-1.0, +1.0].
// sc16: Complex signed integer (16-bit integers) range [-32768, +32767].
// sc8: Complex signed integer (8-bit integers) range [-128, 127].
if (item_type_ == "cbyte")
{
item_size_ = sizeof(lv_8sc_t);
uhd_stream_args_ = uhd::stream_args_t("sc8");
}
else if (item_type_ == "cshort")
{
item_size_ = sizeof(lv_16sc_t);
uhd_stream_args_ = uhd::stream_args_t("sc16");
}
else if (item_type_ == "gr_complex")
{
item_size_ = sizeof(gr_complex);
uhd_stream_args_ = uhd::stream_args_t("fc32");
}
else
{
LOG(WARNING) << item_type_ << " unrecognized item type. Using cshort.";
item_size_ = sizeof(lv_16sc_t);
uhd_stream_args_ = uhd::stream_args_t("sc16");
}
// select the number of channels and the subdevice specifications
for (int i = 0; i < RF_channels_; i++)
{
uhd_stream_args_.channels.push_back(i);
}
// 1.2 Make the UHD source object
uhd_source_ = gr::uhd::usrp_source::make(dev_addr, uhd_stream_args_);
// Set subdevice specification string for USRP family devices. It is composed of:
// <motherboard slot name>:<daughterboard frontend name>
// For motherboards: All USRP family motherboards have a first slot named A:.
// The USRP1 has two daughterboard subdevice slots, known as A: and B:.
// For daughterboards, see http://files.ettus.com/uhd_docs/manual/html/dboards.html
// "0" is valid for DBSRX, DBSRX2, WBX Series
// Dual channel example: "A:0 B:0"
// TODO: Add support for multiple motherboards (i.e. four channels "A:0 B:0 A:1 B1")
uhd_source_->set_subdev_spec(subdevice_, 0);
// 2.1 set sampling clock reference
// Set the clock source for the usrp device.
// Options: internal, external, or MIMO
uhd_source_->set_clock_source(clock_source_);
// 2.2 set the sample rate for the usrp device
uhd_source_->set_samp_rate(sample_rate_);
// the actual sample rate may differ from the rate set
std::cout << "Sampling Rate for the USRP device: " << uhd_source_->get_samp_rate() << " [sps]...\n";
LOG(INFO) << "Sampling Rate for the USRP device: " << uhd_source_->get_samp_rate() << " [sps]...";
std::vector<std::string> sensor_names;
for (int i = 0; i < RF_channels_; i++)
{
std::cout << "UHD RF CHANNEL #" << i << " SETTINGS\n";
// 3. Tune the usrp device to the desired center frequency
uhd_source_->set_center_freq(freq_.at(i), i);
std::cout << "Actual USRP center freq.: " << uhd_source_->get_center_freq(i) << " [Hz]...\n";
LOG(INFO) << "Actual USRP center freq. set to: " << uhd_source_->get_center_freq(i) << " [Hz]...";
// TODO: Assign the remnant IF from the PLL tune error
std::cout << "PLL Frequency tune error: " << uhd_source_->get_center_freq(i) - freq_.at(i) << " [Hz]...\n";
LOG(INFO) << "PLL Frequency tune error: " << uhd_source_->get_center_freq(i) - freq_.at(i) << " [Hz]...";
// 4. set the gain for the daughterboard
uhd_source_->set_gain(gain_.at(i), i);
std::cout << "Actual daughterboard gain set to: " << uhd_source_->get_gain(i) << " dB...\n";
LOG(INFO) << "Actual daughterboard gain set to: " << uhd_source_->get_gain(i) << " dB...";
// 5. Set the bandpass filter on the RF frontend
std::cout << "Setting RF bandpass filter bandwidth to: " << IF_bandwidth_hz_.at(i) << " [Hz]...\n";
uhd_source_->set_bandwidth(IF_bandwidth_hz_.at(i), i);
// set the antenna (optional)
// uhd_source_->set_antenna(ant);
// We should wait? #include <boost/thread.hpp>
// boost::this_thread::sleep(boost::posix_time::seconds(1));
// Check out the status of the lo_locked sensor (boolean for LO lock state)
sensor_names = uhd_source_->get_sensor_names(i);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked") != sensor_names.end())
{
uhd::sensor_value_t lo_locked = uhd_source_->get_sensor("lo_locked", i);
std::cout << "Check for front-end " << lo_locked.to_pp_string() << " is ... ";
if (lo_locked.to_bool() == true)
{
std::cout << "Locked\n";
}
else
{
std::cout << "UNLOCKED!\n";
}
// UHD_ASSERT_THROW(lo_locked.to_bool());
}
}
for (int i = 0; i < RF_channels_; i++)
{
if (samples_.at(i) != 0ULL)
{
LOG(INFO) << "RF_channel " << i << " Send STOP signal after " << samples_.at(i) << " samples";
valve_.emplace_back(gnss_sdr_make_valve(item_size_, samples_.at(i), queue));
DLOG(INFO) << "valve(" << valve_.at(i)->unique_id() << ")";
}
if (dump_.at(i))
{
LOG(INFO) << "RF_channel " << i << "Dumping output into file " << dump_filename_.at(i);
file_sink_.push_back(gr::blocks::file_sink::make(item_size_, dump_filename_.at(i).c_str()));
DLOG(INFO) << "file_sink(" << file_sink_.at(i)->unique_id() << ")";
}
}
if (in_stream_ > 0)
{
LOG(ERROR) << "A signal source does not have an input stream";
}
if (out_stream_ > 1)
{
LOG(ERROR) << "This implementation only supports one output stream";
}
}
void UhdSignalSource::connect(gr::top_block_sptr top_block)
{
for (int i = 0; i < RF_channels_; i++)
{
if (samples_.at(i) != 0ULL)
{
top_block->connect(uhd_source_, i, valve_.at(i), 0);
DLOG(INFO) << "connected usrp source to valve RF Channel " << i;
if (dump_.at(i))
{
top_block->connect(valve_.at(i), 0, file_sink_.at(i), 0);
DLOG(INFO) << "connected valve to file sink RF Channel " << i;
}
}
else
{
if (dump_.at(i))
{
top_block->connect(uhd_source_, i, file_sink_.at(i), 0);
DLOG(INFO) << "connected usrp source to file sink RF Channel " << i;
}
}
}
}
void UhdSignalSource::disconnect(gr::top_block_sptr top_block)
{
uhd_source_->stop();
for (int i = 0; i < RF_channels_; i++)
{
if (samples_.at(i) != 0ULL)
{
top_block->disconnect(uhd_source_, i, valve_.at(i), 0);
LOG(INFO) << "UHD source disconnected";
if (dump_.at(i))
{
top_block->disconnect(valve_.at(i), 0, file_sink_.at(i), 0);
}
}
else
{
if (dump_.at(i))
{
top_block->disconnect(uhd_source_, i, file_sink_.at(i), 0);
}
}
}
}
gr::basic_block_sptr UhdSignalSource::get_left_block()
{
LOG(WARNING) << "Trying to get signal source left block.";
// return gr_basic_block_sptr();
return gr::uhd::usrp_source::sptr();
}
gr::basic_block_sptr UhdSignalSource::get_right_block()
{
return get_right_block(0);
}
gr::basic_block_sptr UhdSignalSource::get_right_block(int RF_channel)
{
// TODO: There is a incoherence here: Multichannel UHD is a single block with multiple outputs, but if the sample limit is enabled, the output is a multiple block!
if (samples_.at(RF_channel) != 0ULL)
{
return valve_.at(RF_channel);
}
return uhd_source_;
}
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