diff options
Diffstat (limited to 'host/examples/rx_ascii_art_dft.cpp')
| -rw-r--r-- | host/examples/rx_ascii_art_dft.cpp | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/host/examples/rx_ascii_art_dft.cpp b/host/examples/rx_ascii_art_dft.cpp new file mode 100644 index 000000000..fa8c4d4a4 --- /dev/null +++ b/host/examples/rx_ascii_art_dft.cpp @@ -0,0 +1,172 @@ +// +// 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; +} |