uhd: a lot of tweaking, new parameters, and sig handler for to/from file examples

1 files changed, 55 insertions, 17 deletions

diff --git a/host/examples/rx_samples_to_file.cpp b/host/examples/rx_samples_to_file.cpp
index bbfcc6d7c..61add87c7 100644
--- a/host/examples/rx_samples_to_file.cpp
+++ b/host/examples/rx_samples_to_file.cpp
@@ -23,10 +23,14 @@
 #include <boost/thread.hpp>
 #include <iostream>
 #include <fstream>
+#include <csignal>
 #include <complex>
 
 namespace po = boost::program_options;
 
+static bool stop_signal_called = false;
+void sig_int_handler(int){stop_signal_called = true;}
+
 template<typename samp_type> void recv_to_file(
     uhd::usrp::multi_usrp::sptr usrp,
     const uhd::io_type_t &io_type,
@@ -37,7 +41,7 @@ template<typename samp_type> void recv_to_file(
     std::vector<samp_type> buff(samps_per_buff);
     std::ofstream outfile(file.c_str(), std::ofstream::binary);
 
-    while(true){
+    while(not stop_signal_called){
         size_t num_rx_samps = usrp->get_device()->recv(
             &buff.front(), buff.size(), md, io_type,
             uhd::device::RECV_MODE_FULL_BUFF
@@ -60,9 +64,9 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     uhd::set_thread_priority_safe();
 
     //variables to be set by po
-    std::string args, file, type;
+    std::string args, file, type, ant, subdev;
     size_t total_num_samps, spb;
-    double rate, freq, gain;
+    double rate, freq, gain, bw;
 
     //setup the program options
     po::options_description desc("Allowed options");
@@ -70,12 +74,15 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("help", "help message")
         ("args", po::value<std::string>(&args)->default_value(""), "multi uhd device address args")
         ("file", po::value<std::string>(&file)->default_value("usrp_samples.dat"), "name of the file to write binary samples to")
-        ("type", po::value<std::string>(&type)->default_value("float"), "choose the sample type: double, float, or short")
-        ("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to receive")
+        ("type", po::value<std::string>(&type)->default_value("float"), "sample type: double, float, or short")
+        ("nsamps", po::value<size_t>(&total_num_samps)->default_value(0), "total number of samples to receive")
         ("spb", po::value<size_t>(&spb)->default_value(10000), "samples per buffer")
-        ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of incoming samples")
-        ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
-        ("gain", po::value<double>(&gain)->default_value(0), "gain for the RF chain")
+        ("rate", po::value<double>(&rate), "rate of incoming samples")
+        ("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), "select antenna")
+        ("subdev", po::value<std::string>(&subdev), "select subdevice")
+        ("bw", po::value<double>(&bw), "select IF filter bandwidth in Hz")
     ;
     po::variables_map vm;
     po::store(po::parse_command_line(argc, argv, desc), vm);
@@ -91,30 +98,61 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     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 rx sample rate
+    //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 rx center frequency
-    std::cout << boost::format("Setting RX Freq: %f Mhz...") % (freq/1e6) << 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;
+    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 rx rf 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
 
     //setup streaming
-    uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
+    uhd::stream_cmd_t stream_cmd((total_num_samps == 0)?
+        uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS:
+        uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE
+    );
     stream_cmd.num_samps = total_num_samps;
     stream_cmd.stream_now = true;
     usrp->issue_stream_cmd(stream_cmd);
+    if (total_num_samps == 0){
+        std::signal(SIGINT, &sig_int_handler);
+        std::cout << "Press Ctrl + C to stop streaming..." << std::endl;
+    }
 
     //recv to file
     if (type == "double") recv_to_file<std::complex<double> >(usrp, uhd::io_type_t::COMPLEX_FLOAT64, file, spb);