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Diffstat (limited to 'host/examples/tx_bursts.cpp')
| -rw-r--r-- | host/examples/tx_bursts.cpp | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/host/examples/tx_bursts.cpp b/host/examples/tx_bursts.cpp new file mode 100644 index 000000000..0545a8870 --- /dev/null +++ b/host/examples/tx_bursts.cpp @@ -0,0 +1,154 @@ +// +// Copyright 2010-2011 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/thread/thread.hpp> +#include <boost/format.hpp> +#include <csignal> +#include <iostream> +#include <complex> + +namespace po = boost::program_options; + +static bool stop_signal_called = false; +void sig_int_handler(int){stop_signal_called = true;} + +int UHD_SAFE_MAIN(int argc, char *argv[]){ + uhd::set_thread_priority_safe(); + + //variables to be set by po + std::string args; + double seconds_in_future; + size_t total_num_samps; + double rate; + float ampl; + double freq; + double rep_rate; + + //setup the program options + po::options_description desc("Allowed options"); + desc.add_options() + ("help", "help message") + ("args", po::value<std::string>(&args)->default_value(""), "multi uhd device address args") + ("secs", po::value<double>(&seconds_in_future)->default_value(1.5), "delay before first burst") + ("rep_rate", po::value<double>(&rep_rate)->default_value(0.5), "repetition rate of bursts") + ("nsamps", po::value<size_t>(&total_num_samps)->default_value(10000), "total number of samples to transmit") + ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of outgoing samples") + ("ampl", po::value<float>(&l)->default_value(float(0.3)), "amplitude of each sample") + ("freq", po::value<double>(&freq)->default_value(0), "center frequency") + ("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::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args); + std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl; + + //set the tx sample rate + std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl; + usrp->set_tx_rate(rate); + std::cout << boost::format("Actual TX Rate: %f Msps...") % (usrp->get_tx_rate()/1e6) << std::endl << std::endl; + + std::cout << boost::format("Setting TX Freq: %f MHz...") % (freq/1e6) << std::endl; + for(size_t i=0; i < usrp->get_tx_num_channels(); i++) usrp->set_tx_freq(freq, i); + std::cout << boost::format("Actual TX Freq: %f MHz...") % (usrp->get_tx_freq()/1e6) << std::endl << std::endl; + + std::cout << boost::format("Setting device timestamp to 0...") << std::endl; + usrp->set_time_now(uhd::time_spec_t(0.0)); + + //allocate buffer with data to send + size_t spb = usrp->get_device()->get_max_send_samps_per_packet(); + + std::vector<std::complex<float> *> buffs; + for(size_t i=0; i < usrp->get_num_mboards(); i++) { + buffs.push_back(new std::complex<float>[spb]); + for(size_t n=0; n < spb; n++) + buffs.back()[n] = std::complex<float>(ampl, ampl); + } + + std::signal(SIGINT, &sig_int_handler); + std::cout << "Press Ctrl + C to quit..." << std::endl; + + double time_to_send = seconds_in_future; + + while(not stop_signal_called) { + //setup metadata for the first packet + uhd::tx_metadata_t md; + md.start_of_burst = true; + md.end_of_burst = false; + md.has_time_spec = true; + md.time_spec = uhd::time_spec_t(time_to_send); + + //the first call to send() will block this many seconds before sending: + double timeout = seconds_in_future + 0.1; //timeout (delay before transmit + padding) + + size_t num_acc_samps = 0; //number of accumulated samples + while(num_acc_samps < total_num_samps){ + size_t samps_to_send = std::min(total_num_samps - num_acc_samps, spb); + + //ensure the the last packet has EOB set + md.end_of_burst = samps_to_send < spb; + + //send a single packet + size_t num_tx_samps = usrp->get_device()->send( + buffs, samps_to_send, md, + uhd::io_type_t::COMPLEX_FLOAT32, + uhd::device::SEND_MODE_ONE_PACKET, timeout + ); + + //do not use time spec for subsequent packets + md.has_time_spec = false; + md.start_of_burst = false; + + if (num_tx_samps < samps_to_send) std::cerr << "Send timeout..." << std::endl; + if(verbose) std::cout << boost::format("Sent packet: %u samples") % num_tx_samps << std::endl; + + num_acc_samps += num_tx_samps; + } + + time_to_send += rep_rate; + + std::cout << std::endl << "Waiting for async burst ACK... " << std::flush; + uhd::async_metadata_t async_md; + bool got_async_burst_ack = false; + //loop through all messages for the ACK packet (may have underflow messages in queue) + while (not got_async_burst_ack and usrp->get_device()->recv_async_msg(async_md, seconds_in_future)){ + got_async_burst_ack = (async_md.event_code == uhd::async_metadata_t::EVENT_CODE_BURST_ACK); + } + std::cout << (got_async_burst_ack? "success" : "fail") << std::endl; + } + + //finished + std::cout << std::endl << "Done!" << std::endl << std::endl; + + return 0; +} |