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Diffstat (limited to 'host/examples/tx_timed_samples.cpp')
| -rw-r--r-- | host/examples/tx_timed_samples.cpp | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/host/examples/tx_timed_samples.cpp b/host/examples/tx_timed_samples.cpp new file mode 100644 index 000000000..799da37e0 --- /dev/null +++ b/host/examples/tx_timed_samples.cpp @@ -0,0 +1,115 @@ +// +// Copyright 2010 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/single_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; + time_t seconds_in_future; + size_t total_num_samps; + size_t samps_per_packet; + double rate, freq; + float ampl; + + //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") + ("secs", po::value<time_t>(&seconds_in_future)->default_value(3), "number of seconds in the future to transmit") + ("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to transmit") + ("spp", po::value<size_t>(&samps_per_packet)->default_value(1000), "number of samples per packet") + ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of outgoing samples") + ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz") + ("ampl", po::value<float>(&l)->default_value(float(0.3)), "amplitude of each sample") + ("dilv", "specify to disable inner-loop verbose") + ; + 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 TX Timed Samples %s") % desc << std::endl; + return ~0; + } + + bool verbose = vm.count("dilv") == 0; + + //create a usrp device + std::cout << std::endl; + std::cout << boost::format("Creating the usrp device with: %s...") % args << std::endl; + uhd::usrp::single_usrp::sptr sdev = uhd::usrp::single_usrp::make(args); + uhd::device::sptr dev = sdev->get_device(); + std::cout << boost::format("Using Device: %s") % sdev->get_pp_string() << std::endl; + + //set the tx sample rate + std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl; + sdev->set_tx_rate(rate); + std::cout << boost::format("Actual TX Rate: %f Msps...") % (sdev->get_tx_rate()/1e6) << std::endl << std::endl; + + //set the tx center frequency + std::cout << boost::format("Setting TX Freq: %f Mhz...") % (freq/1e6) << std::endl; + sdev->set_tx_freq(freq); + std::cout << boost::format("Actual TX Freq: %f Mhz...") % (sdev->get_tx_freq()/1e6) << std::endl << std::endl; + + std::cout << boost::format("Setting device timestamp to 0...") << std::endl; + sdev->set_time_now(uhd::time_spec_t(0.0)); + + //allocate data to send + std::vector<std::complex<float> > buff(samps_per_packet, std::complex<float>(ampl, ampl)); + + //send the data in multiple packets + size_t num_packets = (total_num_samps+samps_per_packet-1)/samps_per_packet; + for (size_t i = 0; i < num_packets; i++){ + //setup the metadata flags and time spec + uhd::tx_metadata_t md; + md.start_of_burst = true; //always SOB (good for continuous streaming) + md.end_of_burst = (i == num_packets-1); //only last packet has EOB + md.has_time_spec = (i == 0); //only first packet has time + md.time_spec = uhd::time_spec_t(seconds_in_future); + + size_t samps_to_send = std::min(total_num_samps - samps_per_packet*i, samps_per_packet); + + //send the entire packet (driver fragments internally) + size_t num_tx_samps = dev->send( + &buff.front(), samps_to_send, md, + uhd::io_type_t::COMPLEX_FLOAT32, + uhd::device::SEND_MODE_FULL_BUFF, + //send will backup into the host this many seconds before sending: + seconds_in_future + 0.1 //timeout (delay before transmit + padding) + ); + if (num_tx_samps < samps_to_send) std::cout << "Send timeout..." << std::endl; + if(verbose) std::cout << std::endl << boost::format("Sent %d samples") % num_tx_samps << std::endl; + } + + //finished + std::cout << std::endl << "Done!" << std::endl << std::endl; + + return 0; +} |