1 files changed, 120 insertions, 0 deletions
diff --git a/host/examples/tx_timed_samples.cpp b/host/examples/tx_timed_samples.cpp
new file mode 100644
index 000000000..f10d7e4ea
--- /dev/null
+++ b/host/examples/tx_timed_samples.cpp
@@ -0,0 +1,120 @@
+//
+// 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 <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;
+    double seconds_in_future;
+    size_t total_num_samps;
+    size_t samps_per_packet;
+    double rate, freq;
+    float ampl;
+
+    //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")
+        ("secs", po::value<double>(&seconds_in_future)->default_value(3), "number of seconds in the future to transmit")
+        ("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to transmit")
+        ("spp", po::value<size_t>(&samps_per_packet)->default_value(1000), "number of samples per packet")
+        ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of outgoing samples")
+        ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
+        ("ampl", po::value<float>(&ampl)->default_value(float(0.3)), "amplitude of each sample")
+        ("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;
+
+    //set the tx center frequency
+    std::cout << boost::format("Setting TX Freq: %f Mhz...") % (freq/1e6) << std::endl;
+    usrp->set_tx_freq(freq);
+    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 data to send
+    std::vector<std::complex<float> > buff(samps_per_packet, std::complex<float>(ampl, ampl));
+
+    uhd::tx_metadata_t md;
+    md.time_spec = uhd::time_spec_t(seconds_in_future);
+
+    //send the data in multiple packets
+    size_t num_packets = (total_num_samps+samps_per_packet-1)/samps_per_packet;
+    for (size_t i = 0; i < num_packets; i++){
+
+        //setup the metadata flags per fragment
+        md.start_of_burst = (i == 0);              //only first packet has SOB
+        md.end_of_burst   = (i == num_packets-1);  //only last packet has EOB
+        md.has_time_spec  = (i == 0);              //only first packet has time
+
+        size_t samps_to_send = std::min(total_num_samps - samps_per_packet*i, samps_per_packet);
+
+        //send the entire packet (driver fragments internally)
+        size_t num_tx_samps = usrp->get_device()->send(
+            &buff.front(), samps_to_send, md,
+            uhd::io_type_t::COMPLEX_FLOAT32,
+            uhd::device::SEND_MODE_FULL_BUFF,
+            //send will backup into the host this many seconds before sending:
+            seconds_in_future + 0.1 //timeout (delay before transmit + padding)
+        );
+        if (num_tx_samps < samps_to_send) std::cout << "Send timeout..." << std::endl;
+        if(verbose) std::cout << std::endl << boost::format("Sent %d samples") % num_tx_samps << std::endl;
+    }
+
+    //ensure that the buffers have flushed out to the device before deconstruction
+    boost::this_thread::sleep(boost::posix_time::seconds(1));
+
+    //finished
+    std::cout << std::endl << "Done!" << std::endl << std::endl;
+
+    return 0;
+}