mirror of
https://github.com/saymrwulf/uhd.git
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107 lines
4.4 KiB
C++
107 lines
4.4 KiB
C++
//
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// Copyright 2010 Ettus Research LLC
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#include <uhd/utils/thread_priority.hpp>
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#include <uhd/utils/safe_main.hpp>
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#include <uhd/usrp/single_usrp.hpp>
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#include <boost/program_options.hpp>
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#include <boost/format.hpp>
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#include <iostream>
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#include <complex>
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namespace po = boost::program_options;
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int UHD_SAFE_MAIN(int argc, char *argv[]){
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uhd::set_thread_priority_safe();
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//variables to be set by po
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std::string args;
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time_t seconds_in_future;
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size_t total_num_samps;
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size_t samps_per_packet;
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double tx_rate, freq;
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float ampl;
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//setup the program options
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po::options_description desc("Allowed options");
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desc.add_options()
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("help", "help message")
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("args", po::value<std::string>(&args)->default_value(""), "single uhd device address args")
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("secs", po::value<time_t>(&seconds_in_future)->default_value(3), "number of seconds in the future to transmit")
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("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to transmit")
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("spp", po::value<size_t>(&samps_per_packet)->default_value(1000), "number of samples per packet")
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("txrate", po::value<double>(&tx_rate)->default_value(100e6/16), "rate of outgoing samples")
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("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
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("ampl", po::value<float>(&l)->default_value(float(0.3)), "amplitude of each sample")
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("dilv", "specify to disable inner-loop verbose")
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;
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po::variables_map vm;
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po::store(po::parse_command_line(argc, argv, desc), vm);
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po::notify(vm);
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//print the help message
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if (vm.count("help")){
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std::cout << boost::format("UHD TX Timed Samples %s") % desc << std::endl;
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return ~0;
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}
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bool verbose = vm.count("dilv") == 0;
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//create a usrp device
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std::cout << std::endl;
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std::cout << boost::format("Creating the usrp device with: %s...") % args << std::endl;
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uhd::usrp::single_usrp::sptr sdev = uhd::usrp::single_usrp::make(args);
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uhd::device::sptr dev = sdev->get_device();
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std::cout << boost::format("Using Device: %s") % sdev->get_pp_string() << std::endl;
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//set properties on the device
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std::cout << boost::format("Setting TX Rate: %f Msps...") % (tx_rate/1e6) << std::endl;
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sdev->set_tx_rate(tx_rate);
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std::cout << boost::format("Actual TX Rate: %f Msps...") % (sdev->get_tx_rate()/1e6) << std::endl;
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std::cout << boost::format("Setting device timestamp to 0...") << std::endl;
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sdev->set_tx_freq(freq);
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sdev->set_time_now(uhd::time_spec_t(0.0));
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//allocate data to send
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std::vector<std::complex<float> > buff(samps_per_packet, std::complex<float>(ampl, ampl));
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//send the data in multiple packets
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size_t num_packets = (total_num_samps+samps_per_packet-1)/samps_per_packet;
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for (size_t i = 0; i < num_packets; i++){
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//setup the metadata flags and time spec
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uhd::tx_metadata_t md;
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md.start_of_burst = true; //always SOB (good for continuous streaming)
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md.end_of_burst = (i == num_packets-1); //only last packet has EOB
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md.has_time_spec = (i == 0); //only first packet has time
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md.time_spec = uhd::time_spec_t(seconds_in_future);
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size_t samps_to_send = std::min(total_num_samps - samps_per_packet*i, samps_per_packet);
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//send the entire packet (driver fragments internally)
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size_t num_tx_samps = dev->send(
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&buff.front(), samps_to_send, md,
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uhd::io_type_t::COMPLEX_FLOAT32,
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uhd::device::SEND_MODE_FULL_BUFF
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);
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if(verbose) std::cout << std::endl << boost::format("Sent %d samples") % num_tx_samps << std::endl;
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}
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//finished
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std::cout << std::endl << "Done!" << std::endl << std::endl;
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return 0;
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}
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