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Diffstat (limited to 'src/output/UHD.cpp')
| -rw-r--r-- | src/output/UHD.cpp | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/src/output/UHD.cpp b/src/output/UHD.cpp new file mode 100644 index 0000000..55beacc --- /dev/null +++ b/src/output/UHD.cpp @@ -0,0 +1,474 @@ +/* + Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Her Majesty the + Queen in Right of Canada (Communications Research Center Canada) + + Copyright (C) 2017 + Matthias P. Braendli, matthias.braendli@mpb.li + + http://opendigitalradio.org + */ +/* + This file is part of ODR-DabMod. + + ODR-DabMod is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as + published by the Free Software Foundation, either version 3 of the + License, or (at your option) any later version. + + ODR-DabMod is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with ODR-DabMod. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "output/UHD.h" + +#ifdef HAVE_OUTPUT_UHD + +//#define MDEBUG(fmt, args...) fprintf(LOG, fmt , ## args) +#define MDEBUG(fmt, args...) + +#include "PcDebug.h" +#include "Log.h" +#include "RemoteControl.h" +#include "Utils.h" + +#include <boost/thread/future.hpp> + +#include <uhd/utils/msg.hpp> + +#include <cmath> +#include <iostream> +#include <assert.h> +#include <stdexcept> +#include <stdio.h> +#include <time.h> +#include <errno.h> +#include <unistd.h> +#include <pthread.h> + +using namespace std; + +namespace Output { + +// Maximum number of frames that can wait in frames +static const size_t FRAMES_MAX_SIZE = 8; + +static std::string stringtrim(const std::string &s) +{ + auto wsfront = std::find_if_not(s.begin(), s.end(), + [](int c){ return std::isspace(c);} ); + return std::string(wsfront, + std::find_if_not(s.rbegin(), + std::string::const_reverse_iterator(wsfront), + [](int c){ return std::isspace(c);} ).base()); +} + +static void uhd_msg_handler(uhd::msg::type_t type, const std::string &msg) +{ + if (type == uhd::msg::warning) { + etiLog.level(warn) << "UHD Warning: " << msg; + } + else if (type == uhd::msg::error) { + etiLog.level(error) << "UHD Error: " << msg; + } + else { + // do not print very short U messages and such + if (stringtrim(msg).size() != 1) { + etiLog.level(debug) << "UHD Message: " << msg; + } + } +} + + + +UHD::UHD( + SDRDeviceConfig& config) : + SDRDevice(), + m_conf(config), + m_running(false) +{ + std::stringstream device; + device << m_conf.device; + + if (m_conf.masterClockRate != 0) { + if (device.str() != "") { + device << ","; + } + device << "master_clock_rate=" << m_conf.masterClockRate; + } + + MDEBUG("OutputUHD::OutputUHD(device: %s) @ %p\n", + device.str().c_str(), this); + + /* TODO + RC_ADD_PARAMETER(rxgain, "UHD analog daughterboard RX gain for DPD feedback"); + */ + + uhd::msg::register_handler(uhd_msg_handler); + + uhd::set_thread_priority_safe(); + + etiLog.log(info, "OutputUHD:Creating the usrp device with: %s...", + device.str().c_str()); + + m_usrp = uhd::usrp::multi_usrp::make(device.str()); + + etiLog.log(info, "OutputUHD:Using device: %s...", + m_usrp->get_pp_string().c_str()); + + if (m_conf.masterClockRate != 0.0) { + double master_clk_rate = m_usrp->get_master_clock_rate(); + etiLog.log(debug, "OutputUHD:Checking master clock rate: %f...", + master_clk_rate); + + if (fabs(master_clk_rate - m_conf.masterClockRate) > + (m_conf.masterClockRate * 1e-6)) { + throw std::runtime_error("Cannot set USRP master_clock_rate. Aborted."); + } + } + + MDEBUG("OutputUHD:Setting REFCLK and PPS input...\n"); + + if (m_conf.refclk_src == "gpsdo-ettus") { + m_usrp->set_clock_source("gpsdo"); + } + else { + m_usrp->set_clock_source(m_conf.refclk_src); + } + m_usrp->set_time_source(m_conf.pps_src); + + m_device_time = std::make_shared<USRPTime>(m_usrp, m_conf); + + if (m_conf.subDevice != "") { + m_usrp->set_tx_subdev_spec(uhd::usrp::subdev_spec_t(m_conf.subDevice), + uhd::usrp::multi_usrp::ALL_MBOARDS); + } + + etiLog.level(debug) << "UHD clock source is " << m_usrp->get_clock_source(0); + + etiLog.level(debug) << "UHD time source is " << m_usrp->get_time_source(0); + + m_usrp->set_tx_rate(m_conf.sampleRate); + etiLog.log(debug, "OutputUHD:Set rate to %d. Actual TX Rate: %f sps...", + m_conf.sampleRate, m_usrp->get_tx_rate()); + + if (fabs(m_usrp->get_tx_rate() / m_conf.sampleRate) > + m_conf.sampleRate * 1e-6) { + throw std::runtime_error("Cannot set USRP sample rate. Aborted."); + } + + tune(m_conf.lo_offset, m_conf.frequency); + + m_conf.frequency = m_usrp->get_tx_freq(); + etiLog.level(info) << std::fixed << std::setprecision(3) << + "OutputUHD:Actual TX frequency: " << m_conf.frequency; + + etiLog.level(info) << std::fixed << std::setprecision(3) << + "OutputUHD:Actual RX frequency: " << m_usrp->get_tx_freq(); + + m_usrp->set_tx_gain(m_conf.txgain); + m_conf.txgain = m_usrp->get_tx_gain(); + etiLog.log(debug, "OutputUHD:Actual TX Gain: %f", m_conf.txgain); + + etiLog.log(debug, "OutputUHD:Mute on missing timestamps: %s", + m_conf.muteNoTimestamps ? "enabled" : "disabled"); + + // preparing output thread worker data + // TODO sourceContainsTimestamp = false; + + m_usrp->set_rx_rate(m_conf.sampleRate); + etiLog.log(debug, "OutputUHD:Actual RX Rate: %f sps.", m_usrp->get_rx_rate()); + + m_usrp->set_rx_antenna("RX2"); + etiLog.log(debug, "OutputUHD:Set RX Antenna: %s", + m_usrp->get_rx_antenna().c_str()); + + m_usrp->set_rx_gain(m_conf.rxgain); + etiLog.log(debug, "OutputUHD:Actual RX Gain: %f", m_usrp->get_rx_gain()); + + /* TODO + uhdFeedback = std::make_shared<OutputUHDFeedback>( + m_usrp, m_conf.dpdFeedbackServerPort, m_conf.sampleRate); + */ + + const uhd::stream_args_t stream_args("fc32"); //complex floats + m_rx_stream = m_usrp->get_rx_stream(stream_args); + m_tx_stream = m_usrp->get_tx_stream(stream_args); + + m_running.store(true); + m_async_rx_thread = boost::thread(&UHD::print_async_thread, this); + + MDEBUG("OutputUHD:UHD ready.\n"); +} + +UHD::~UHD() +{ + stop_threads(); +} + +void UHD::tune(double lo_offset, double frequency) +{ + if (lo_offset != 0.0) { + etiLog.level(info) << std::fixed << std::setprecision(3) << + "OutputUHD:Setting freq to " << frequency << + " with LO offset " << lo_offset << "..."; + + const auto tr = uhd::tune_request_t(frequency, lo_offset); + uhd::tune_result_t result = m_usrp->set_tx_freq(tr); + + etiLog.level(debug) << "OutputUHD:" << + std::fixed << std::setprecision(0) << + " Target RF: " << result.target_rf_freq << + " Actual RF: " << result.actual_rf_freq << + " Target DSP: " << result.target_dsp_freq << + " Actual DSP: " << result.actual_dsp_freq; + } + else { + //set the centre frequency + etiLog.level(info) << std::fixed << std::setprecision(3) << + "OutputUHD:Setting freq to " << frequency << "..."; + m_usrp->set_tx_freq(frequency); + } + + // TODO configure LO offset also for RX + m_usrp->set_rx_freq(frequency); +} + +double UHD::get_tx_freq(void) +{ + return m_usrp->get_tx_freq(); +} + +void UHD::set_txgain(double txgain) +{ + m_usrp->set_tx_gain(txgain); + m_conf.txgain = m_usrp->get_tx_gain(); +} + +double UHD::get_txgain(void) +{ + return m_usrp->get_tx_gain(); +} + +void UHD::transmit_frame(const struct FrameData& frame) +{ + const double tx_timeout = 20.0; + const size_t sizeIn = frame.buf.size() / sizeof(complexf); + const complexf* in_data = reinterpret_cast<const complexf*>(&frame.buf[0]); + + size_t usrp_max_num_samps = m_tx_stream->get_max_num_samps(); + size_t num_acc_samps = 0; //number of accumulated samples + while (m_running.load() and (not m_conf.muting) and (num_acc_samps < sizeIn)) { + size_t samps_to_send = std::min(sizeIn - num_acc_samps, usrp_max_num_samps); + + uhd::tx_metadata_t md_tx = md; + + // ensure the the last packet has EOB set if the timestamps has been + // refreshed and need to be reconsidered. + md_tx.end_of_burst = ( + frame.ts.timestamp_valid and + frame.ts.timestamp_refresh and + samps_to_send <= usrp_max_num_samps ); + + //send a single packet + size_t num_tx_samps = m_tx_stream->send( + &in_data[num_acc_samps], + samps_to_send, md_tx, tx_timeout); + etiLog.log(trace, "UHD,sent %zu of %zu", num_tx_samps, samps_to_send); + + num_acc_samps += num_tx_samps; + + md_tx.time_spec = md.time_spec + + uhd::time_spec_t(0, num_tx_samps/m_conf.sampleRate); + + if (num_tx_samps == 0) { + etiLog.log(warn, + "OutputUHD unable to write to device, skipping frame!"); + break; + } + } +} + + +SDRDevice::RunStatistics UHD::get_run_statistics(void) +{ + RunStatistics rs; + rs.num_underruns = num_underflows; + rs.num_overruns = num_overflows; + rs.num_late_packets = num_late_packets; + rs.num_frames_modulated = num_frames_modulated; + return rs; +} + +double UHD::get_real_secs(void) +{ + return m_usrp->get_time_now().get_real_secs(); +} + +void UHD::set_rxgain(double rxgain) +{ + m_usrp->set_rx_gain(m_conf.rxgain); + m_conf.rxgain = m_usrp->get_rx_gain(); +} + +double UHD::get_rxgain() +{ + return m_usrp->get_rx_gain(); +} + +size_t UHD::receive_frame( + complexf *buf, + size_t num_samples, + struct frame_timestamp& ts, + double timeout_secs) +{ + uhd::stream_cmd_t cmd( + uhd::stream_cmd_t::stream_mode_t::STREAM_MODE_NUM_SAMPS_AND_DONE); + cmd.num_samps = num_samples; + cmd.stream_now = false; + cmd.time_spec = uhd::time_spec_t(ts.timestamp_sec, ts.pps_offset()); + + m_rx_stream->issue_stream_cmd(cmd); + + uhd::rx_metadata_t md; + + constexpr double timeout = 60; + size_t samples_read = m_rx_stream->recv(buf, num_samples, md, timeout); + + // Update the ts with the effective receive TS + ts.timestamp_sec = md.time_spec.get_full_secs(); + ts.timestamp_pps = md.time_spec.get_frac_secs() * 16384000.0; + return samples_read; +} + +// Return true if GPS and reference clock inputs are ok +bool UHD::is_clk_source_ok(void) +{ + bool ok = true; + + if (refclk_loss_needs_check()) { + try { + if (not m_usrp->get_mboard_sensor("ref_locked", 0).to_bool()) { + ok = false; + + etiLog.level(alert) << + "OutputUHD: External reference clock lock lost !"; + + if (m_conf.refclk_lock_loss_behaviour == CRASH) { + throw std::runtime_error( + "OutputUHD: External reference clock lock lost."); + } + } + } + catch (uhd::lookup_error &e) { + suppress_refclk_loss_check = true; + etiLog.log(warn, "OutputUHD: This USRP does not have mboard " + "sensor for ext clock loss. Check disabled."); + } + } + + if (m_device_time) { + ok |= m_device_time->verify_time(); + } + + return ok; +} + +const char* UHD::device_name(void) +{ + return "UHD"; +} + + +bool UHD::refclk_loss_needs_check() const +{ + if (suppress_refclk_loss_check) { + return false; + } + return m_conf.refclk_src != "internal"; +} + +void UHD::stop_threads() +{ + m_running.store(false); + if (m_async_rx_thread.joinable()) { + m_async_rx_thread.join(); + } +} + + + +void UHD::print_async_thread() +{ + while (m_running.load()) { + uhd::async_metadata_t async_md; + if (m_usrp->get_device()->recv_async_msg(async_md, 1)) { + const char* uhd_async_message = ""; + bool failure = false; + switch (async_md.event_code) { + case uhd::async_metadata_t::EVENT_CODE_BURST_ACK: + break; + case uhd::async_metadata_t::EVENT_CODE_UNDERFLOW: + uhd_async_message = "Underflow"; + num_underflows++; + break; + case uhd::async_metadata_t::EVENT_CODE_SEQ_ERROR: + uhd_async_message = "Packet loss between host and device."; + failure = true; + break; + case uhd::async_metadata_t::EVENT_CODE_TIME_ERROR: + uhd_async_message = "Packet had time that was late."; + num_late_packets++; + break; + case uhd::async_metadata_t::EVENT_CODE_UNDERFLOW_IN_PACKET: + uhd_async_message = "Underflow occurred inside a packet."; + failure = true; + break; + case uhd::async_metadata_t::EVENT_CODE_SEQ_ERROR_IN_BURST: + uhd_async_message = "Packet loss within a burst."; + failure = true; + break; + default: + uhd_async_message = "unknown event code"; + failure = true; + break; + } + + if (failure) { + etiLog.level(alert) << + "Received Async UHD Message '" << + uhd_async_message << "' at time " << + md.time_spec.get_real_secs(); + } + } + + auto time_now = std::chrono::steady_clock::now(); + if (last_print_time + std::chrono::seconds(1) < time_now) { + const double usrp_time = + m_usrp->get_time_now().get_real_secs(); + + if ( (num_underflows > num_underflows_previous) or + (num_late_packets > num_late_packets_previous)) { + etiLog.log(info, + "OutputUHD status (usrp time: %f): " + "%d underruns and %d late packets since last status.\n", + usrp_time, + num_underflows, num_late_packets); + } + + num_underflows_previous = num_underflows; + num_late_packets_previous = num_late_packets; + + last_print_time = time_now; + } + } +} + +} // namespace Output + +#endif // HAVE_OUTPUT_UHD + |