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//
// Copyright 2016 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include <uhd/usrp/multi_usrp.hpp>
#include <uhd/utils/safe_main.hpp>
#include <uhd/utils/thread.hpp>
#include <boost/format.hpp>
#include <boost/program_options.hpp>
#include <chrono>
#include <iostream>
#include <thread>
namespace po = boost::program_options;
void print_notes(void)
{
// Helpful notes
std::cout << boost::format(
"**************************************Helpful Notes on Clock/PPS "
"Selection**************************************\n");
std::cout << boost::format("As you can see, the default 10 MHz Reference and 1 PPS "
"signals are now from the GPSDO.\n");
std::cout << boost::format(
"If you would like to use the internal reference(TCXO) in other applications, "
"you must configure that explicitly.\n");
std::cout << boost::format(
"You can no longer select the external SMAs for 10 MHz or 1 PPS signaling.\n");
std::cout << boost::format(
"********************************************************************************"
"********************************\n");
}
int UHD_SAFE_MAIN(int argc, char* argv[])
{
std::string args;
// Set up program options
po::options_description desc("Allowed options");
// clang-format off
desc.add_options()
("help", "help message")
("args", po::value<std::string>(&args)->default_value(""), "USRP device arguments")
;
// clang-format on
po::variables_map vm;
po::store(po::parse_command_line(argc, argv, desc), vm);
po::notify(vm);
// Print the help message
if (vm.count("help")) {
std::cout << boost::format("Synchronize USRP to GPS %s") % desc << std::endl;
return EXIT_FAILURE;
}
// Create a USRP device
std::cout << boost::format("\nCreating the USRP device with: %s...\n") % args;
uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args);
std::cout << boost::format("Using Device: %s\n") % usrp->get_pp_string();
try {
size_t num_mboards = usrp->get_num_mboards();
size_t num_gps_locked = 0;
for (size_t mboard = 0; mboard < num_mboards; mboard++) {
std::cout << "Synchronizing mboard " << mboard << ": "
<< usrp->get_mboard_name(mboard) << std::endl;
// Set references to GPSDO
usrp->set_clock_source("gpsdo", mboard);
usrp->set_time_source("gpsdo", mboard);
std::cout << std::endl;
print_notes();
std::cout << std::endl;
// Check for 10 MHz lock
std::vector<std::string> sensor_names = usrp->get_mboard_sensor_names(mboard);
if (std::find(sensor_names.begin(), sensor_names.end(), "ref_locked")
!= sensor_names.end()) {
std::cout << "Waiting for reference lock..." << std::flush;
bool ref_locked = false;
for (int i = 0; i < 30 and not ref_locked; i++) {
ref_locked = usrp->get_mboard_sensor("ref_locked", mboard).to_bool();
if (not ref_locked) {
std::cout << "." << std::flush;
std::this_thread::sleep_for(std::chrono::seconds(1));
}
}
if (ref_locked) {
std::cout << "LOCKED" << std::endl;
} else {
std::cout << "FAILED" << std::endl;
std::cout << "Failed to lock to GPSDO 10 MHz Reference. Exiting."
<< std::endl;
exit(EXIT_FAILURE);
}
} else {
std::cout << boost::format(
"ref_locked sensor not present on this board.\n");
}
// Wait for GPS lock
bool gps_locked = usrp->get_mboard_sensor("gps_locked", mboard).to_bool();
if (gps_locked) {
num_gps_locked++;
std::cout << boost::format("GPS Locked\n");
} else {
std::cerr
<< "WARNING: GPS not locked - time will not be accurate until locked"
<< std::endl;
}
// Set to GPS time
uhd::time_spec_t gps_time = uhd::time_spec_t(
int64_t(usrp->get_mboard_sensor("gps_time", mboard).to_int()));
usrp->set_time_next_pps(gps_time + 1.0, mboard);
// Wait for it to apply
// The wait is 2 seconds because N-Series has a known issue where
// the time at the last PPS does not properly update at the PPS edge
// when the time is actually set.
std::this_thread::sleep_for(std::chrono::seconds(2));
// Check times
gps_time = uhd::time_spec_t(
int64_t(usrp->get_mboard_sensor("gps_time", mboard).to_int()));
uhd::time_spec_t time_last_pps = usrp->get_time_last_pps(mboard);
std::cout << "USRP time: "
<< (boost::format("%0.9f") % time_last_pps.get_real_secs())
<< std::endl;
std::cout << "GPSDO time: "
<< (boost::format("%0.9f") % gps_time.get_real_secs()) << std::endl;
if (gps_time.get_real_secs() == time_last_pps.get_real_secs())
std::cout << std::endl
<< "SUCCESS: USRP time synchronized to GPS time" << std::endl
<< std::endl;
else
std::cerr << std::endl
<< "ERROR: Failed to synchronize USRP time to GPS time"
<< std::endl
<< std::endl;
}
if (num_gps_locked == num_mboards and num_mboards > 1) {
// Check to see if all USRP times are aligned
// First, wait for PPS.
uhd::time_spec_t time_last_pps = usrp->get_time_last_pps();
while (time_last_pps == usrp->get_time_last_pps()) {
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
// Sleep a little to make sure all devices have seen a PPS edge
std::this_thread::sleep_for(std::chrono::milliseconds(200));
// Compare times across all mboards
bool all_matched = true;
uhd::time_spec_t mboard0_time = usrp->get_time_last_pps(0);
for (size_t mboard = 1; mboard < num_mboards; mboard++) {
uhd::time_spec_t mboard_time = usrp->get_time_last_pps(mboard);
if (mboard_time != mboard0_time) {
all_matched = false;
std::cerr << (boost::format("ERROR: Times are not aligned: USRP "
"0=%0.9f, USRP %d=%0.9f")
% mboard0_time.get_real_secs() % mboard
% mboard_time.get_real_secs())
<< std::endl;
}
}
if (all_matched) {
std::cout << "SUCCESS: USRP times aligned" << std::endl << std::endl;
} else {
std::cout << "ERROR: USRP times are not aligned" << std::endl
<< std::endl;
}
}
} catch (std::exception& e) {
std::cout << boost::format("\nError: %s") % e.what();
std::cout << boost::format(
"This could mean that you have not installed the GPSDO correctly.\n\n");
std::cout << boost::format("Visit one of these pages if the problem persists:\n");
std::cout << boost::format(
" * N2X0/E1X0: http://files.ettus.com/manual/page_gpsdo.html");
std::cout << boost::format(
" * X3X0: http://files.ettus.com/manual/page_gpsdo_x3x0.html\n\n");
std::cout << boost::format(
" * E3X0: http://files.ettus.com/manual/page_usrp_e3x0.html#e3x0_hw_gps\n\n");
exit(EXIT_FAILURE);
}
return EXIT_SUCCESS;
}
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