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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 "ascii_art_dft.hpp" //implementation
#include <boost/program_options.hpp>
#include <boost/thread/thread.hpp> //gets time
#include <boost/format.hpp>
#include <curses.h>
#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, ant, subdev;
size_t num_bins;
double rate, freq, gain, bw, frame_rate;
float ref_lvl, dyn_rng;
//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")
// hardware parameters
("rate", po::value<double>(&rate), "rate of incoming samples (sps)")
("freq", po::value<double>(&freq), "RF center frequency in Hz")
("gain", po::value<double>(&gain), "gain for the RF chain")
("ant", po::value<std::string>(&ant), "daughterboard antenna selection")
("subdev", po::value<std::string>(&subdev), "daughterboard subdevice specification")
("bw", po::value<double>(&bw), "daughterboard IF filter bandwidth in Hz")
// display parameters
("num-bins", po::value<size_t>(&num_bins)->default_value(512), "the number of bins in the DFT")
("frame-rate", po::value<double>(&frame_rate)->default_value(5), "frame rate of the display (fps)")
("ref-lvl", po::value<float>(&ref_lvl)->default_value(0), "reference level for the display (dB)")
("dyn-rng", po::value<float>(&dyn_rng)->default_value(60), "dynamic range for the display (dB)")
;
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") or not vm.count("rate")){
std::cout << boost::format("UHD RX ASCII Art DFT %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);
//always select the subdevice first, the channel mapping affects the other settings
if (vm.count("subdev")) usrp->set_rx_subdev_spec(subdev);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//set the sample rate
if (not vm.count("rate")){
std::cerr << "Please specify the sample rate with --rate" << std::endl;
return ~0;
}
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;
//set the center frequency
if (not vm.count("freq")){
std::cerr << "Please specify the center frequency with --freq" << std::endl;
return ~0;
}
std::cout << boost::format("Setting RX Freq: %f MHz...") % (freq/1e6) << std::endl;
usrp->set_rx_freq(freq);
std::cout << boost::format("Actual RX Freq: %f MHz...") % (usrp->get_rx_freq()/1e6) << std::endl << std::endl;
//set the rf gain
if (vm.count("gain")){
std::cout << boost::format("Setting RX Gain: %f dB...") % gain << std::endl;
usrp->set_rx_gain(gain);
std::cout << boost::format("Actual RX Gain: %f dB...") % usrp->get_rx_gain() << std::endl << std::endl;
}
//set the IF filter bandwidth
if (vm.count("bw")){
std::cout << boost::format("Setting RX Bandwidth: %f MHz...") % bw << std::endl;
usrp->set_rx_bandwidth(bw);
std::cout << boost::format("Actual RX Bandwidth: %f MHz...") % usrp->get_rx_bandwidth() << std::endl << std::endl;
}
//set the antenna
if (vm.count("ant")) usrp->set_rx_antenna(ant);
boost::this_thread::sleep(boost::posix_time::seconds(1)); //allow for some setup time
//allocate recv buffer and metatdata
uhd::rx_metadata_t md;
std::vector<std::complex<float> > buff(num_bins);
//------------------------------------------------------------------
//-- Initialize
//------------------------------------------------------------------
initscr(); //curses init
usrp->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
boost::system_time next_refresh = boost::get_system_time();
//------------------------------------------------------------------
//-- Main loop
//------------------------------------------------------------------
while (true){
//read a buffer's worth of samples every iteration
size_t num_rx_samps = usrp->get_device()->recv(
&buff.front(), buff.size(), md,
uhd::io_type_t::COMPLEX_FLOAT32,
uhd::device::RECV_MODE_FULL_BUFF
);
if (num_rx_samps != buff.size()) continue;
//check and update the display refresh condition
if (boost::get_system_time() < next_refresh) continue;
next_refresh = boost::get_system_time() + boost::posix_time::microseconds(long(1e6/frame_rate));
//calculate the dft and create the ascii art frame
acsii_art_dft::log_pwr_dft_type lpdft(
acsii_art_dft::log_pwr_dft(&buff.front(), num_rx_samps)
);
std::string frame = acsii_art_dft::dft_to_plot(
lpdft, COLS, LINES,
usrp->get_rx_rate(),
usrp->get_rx_freq(),
dyn_rng, ref_lvl
);
//curses screen handling: clear and print frame
clear();
printw("%s", frame.c_str());
//curses key handling: no timeout, any key to exit
timeout(0);
int ch = getch();
if (ch != KEY_RESIZE and ch != ERR) break;
}
//------------------------------------------------------------------
//-- Cleanup
//------------------------------------------------------------------
usrp->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
endwin(); //curses done
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return 0;
}
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