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//
// 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/format.hpp>
#include <boost/algorithm/string.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;
std::string wire;
double seconds_in_future;
size_t total_num_samps;
double rate;
std::string channel_list;
//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")
("wire", po::value<std::string>(&wire)->default_value(""), "the over the wire type, sc16, sc8, etc")
("secs", po::value<double>(&seconds_in_future)->default_value(1.5), "number of seconds in the future to receive")
("nsamps", po::value<size_t>(&total_num_samps)->default_value(10000), "total number of samples to receive")
("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of incoming samples")
("dilv", "specify to disable inner-loop verbose")
("channels", po::value<std::string>(&channel_list)->default_value("0"), "which channel(s) to use (specify \"0\", \"1\", \"0,1\", etc)")
;
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 RX 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;
//detect which channels to use
std::vector<std::string> channel_strings;
std::vector<size_t> channel_nums;
boost::split(channel_strings, channel_list, boost::is_any_of("\"',"));
for(size_t ch = 0; ch < channel_strings.size(); ch++){
size_t chan = boost::lexical_cast<int>(channel_strings[ch]);
if(chan >= usrp->get_tx_num_channels() or chan >= usrp->get_rx_num_channels()){
throw std::runtime_error("Invalid channel(s) specified.");
}
else channel_nums.push_back(boost::lexical_cast<int>(channel_strings[ch]));
}
//set the rx sample rate
std::cout << boost::format("Setting RX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_rx_rate(rate);
std::cout << boost::format("Actual RX Rate: %f Msps...") % (usrp->get_rx_rate()/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));
//create a receive streamer
uhd::stream_args_t stream_args("fc32", wire); //complex floats
stream_args.channels = channel_nums;
uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);
//setup streaming
std::cout << std::endl;
std::cout << boost::format(
"Begin streaming %u samples, %f seconds in the future..."
) % total_num_samps % seconds_in_future << std::endl;
uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
stream_cmd.num_samps = total_num_samps;
stream_cmd.stream_now = false;
stream_cmd.time_spec = uhd::time_spec_t(seconds_in_future);
rx_stream->issue_stream_cmd(stream_cmd);
//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(rx_stream->get_max_num_samps());
std::vector<void *> buffs;
for (size_t ch = 0; ch < rx_stream->get_num_channels(); ch++)
buffs.push_back(&buff.front()); //same buffer for each channel
//the first call to recv() will block this many seconds before receiving
double timeout = seconds_in_future + 0.1; //timeout (delay before receive + padding)
size_t num_acc_samps = 0; //number of accumulated samples
while(num_acc_samps < total_num_samps){
//receive a single packet
size_t num_rx_samps = rx_stream->recv(
buffs, buff.size(), md, timeout, true
);
//use a small timeout for subsequent packets
timeout = 0.1;
//handle the error code
if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_TIMEOUT) break;
if (md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE){
throw std::runtime_error(str(boost::format(
"Receiver error %s"
) % md.strerror()));
}
if(verbose) 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;
num_acc_samps += num_rx_samps;
}
if (num_acc_samps < total_num_samps) std::cerr << "Receive timeout before all samples received..." << std::endl;
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return EXIT_SUCCESS;
}
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