diff options
Diffstat (limited to 'host/examples')
| -rw-r--r-- | host/examples/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | host/examples/test_timed_commands.cpp | 129 | ||||
| -rw-r--r-- | host/examples/tx_waveforms.cpp | 5 |
3 files changed, 134 insertions, 1 deletions
diff --git a/host/examples/CMakeLists.txt b/host/examples/CMakeLists.txt index 3c9a3880a..151a7cdf0 100644 --- a/host/examples/CMakeLists.txt +++ b/host/examples/CMakeLists.txt @@ -27,6 +27,7 @@ SET(example_sources rx_timed_samples.cpp test_messages.cpp test_pps_input.cpp + test_timed_commands.cpp tx_bursts.cpp tx_samples_from_file.cpp tx_timed_samples.cpp diff --git a/host/examples/test_timed_commands.cpp b/host/examples/test_timed_commands.cpp new file mode 100644 index 000000000..34c83dfd6 --- /dev/null +++ b/host/examples/test_timed_commands.cpp @@ -0,0 +1,129 @@ +// +// Copyright 2012 Ettus Research LLC +// +// This program 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. +// +// This program 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 this program. If not, see <http://www.gnu.org/licenses/>. +// + +#include <uhd/utils/thread_priority.hpp> +#include <uhd/utils/safe_main.hpp> +#include <uhd/usrp/multi_usrp.hpp> +#include <boost/program_options.hpp> +#include <boost/format.hpp> +#include <iostream> +#include <complex> + +namespace po = boost::program_options; + +int UHD_SAFE_MAIN(int argc, char *argv[]){ + uhd::set_thread_priority_safe(); + + //variables to be set by po + std::string args; + + //setup the program options + po::options_description desc("Allowed options"); + desc.add_options() + ("help", "help message") + ("args", po::value<std::string>(&args)->default_value(""), "single uhd device address args") + ; + 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("UHD Test Timed Commands %s") % desc << std::endl; + return ~0; + } + + //create a usrp device + std::cout << std::endl; + std::cout << boost::format("Creating the usrp device with: %s...") % args << std::endl; + uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args); + std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl; + + //check if timed commands are supported + std::cout << std::endl; + std::cout << "Testing support for timed commands on this hardware... " << std::flush; + try{ + usrp->set_command_time(uhd::time_spec_t(0.0)); + usrp->clear_command_time(); + } + catch (const std::exception &e){ + std::cout << "fail" << std::endl; + std::cerr << "Got exception: " << e.what() << std::endl; + std::cerr << "Timed commands are not supported on this hardware." << std::endl; + return ~0; + } + std::cout << "pass" << std::endl; + + //readback time really fast, time diff is small + std::cout << std::endl; + std::cout << "Perform fast readback of registers:" << std::endl; + uhd::time_spec_t total_time; + for (size_t i = 0; i < 100; i++){ + const uhd::time_spec_t t0 = usrp->get_time_now(); + const uhd::time_spec_t t1 = usrp->get_time_now(); + total_time += (t1-t0); + } + std::cout << boost::format( + "Difference between paired reads: %f us" + ) % (total_time.get_real_secs()/100*1e6) << std::endl; + + //use a timed command to start a stream at a specific time + //this is not the right way start streaming at time x, + //but it should approximate it within control RTT/2 + //setup streaming + std::cout << std::endl; + std::cout << "About to start streaming using timed command:" << std::endl; + + //create a receive streamer + uhd::stream_args_t stream_args("fc32"); //complex floats + uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args); + + uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE); + stream_cmd.num_samps = 100; + stream_cmd.stream_now = true; + const uhd::time_spec_t stream_time = usrp->get_time_now() + uhd::time_spec_t(0.1); + usrp->set_command_time(stream_time); + usrp->issue_stream_cmd(stream_cmd); + usrp->clear_command_time(); + + //meta-data will be filled in by recv() + uhd::rx_metadata_t md; + + //allocate buffer to receive with samples + std::vector<std::complex<float> > buff(stream_cmd.num_samps); + + const size_t num_rx_samps = rx_stream->recv(&buff.front(), buff.size(), md); + if (md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE){ + throw std::runtime_error(str(boost::format( + "Unexpected error code 0x%x" + ) % md.error_code)); + } + std::cout << boost::format( + "Received packet: %u samples, %u full secs, %f frac secs" + ) % num_rx_samps % md.time_spec.get_full_secs() % md.time_spec.get_frac_secs() << std::endl; + std::cout << boost::format( + "Stream time was: %u full secs, %f frac secs" + ) % stream_time.get_full_secs() % stream_time.get_frac_secs() << std::endl; + std::cout << boost::format( + "Difference between stream time and first packet: %f us" + ) % ((md.time_spec-stream_time).get_real_secs()/100*1e6) << std::endl; + + //finished + std::cout << std::endl << "Done!" << std::endl << std::endl; + + return 0; +} diff --git a/host/examples/tx_waveforms.cpp b/host/examples/tx_waveforms.cpp index 6a377fdac..3c5eecd65 100644 --- a/host/examples/tx_waveforms.cpp +++ b/host/examples/tx_waveforms.cpp @@ -1,5 +1,5 @@ // -// Copyright 2010-2011 Ettus Research LLC +// Copyright 2010-2012 Ettus Research LLC // // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by @@ -24,6 +24,7 @@ #include <boost/math/special_functions/round.hpp> #include <boost/foreach.hpp> #include <boost/format.hpp> +#include <boost/thread.hpp> #include <iostream> #include <complex> #include <csignal> @@ -174,6 +175,8 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){ if (vm.count("ant")) usrp->set_tx_antenna(ant, chan); } + boost::this_thread::sleep(boost::posix_time::seconds(1)); //allow for some setup time + //for the const wave, set the wave freq for small samples per period if (wave_freq == 0 and wave_type == "CONST"){ wave_freq = usrp->get_tx_rate()/2; |