usrp-e: Add example that reads data from uhd and sends it over a udp socket.

2 files changed, 171 insertions, 0 deletions

diff --git a/host/examples/CMakeLists.txt b/host/examples/CMakeLists.txt
index fb7777d42..3b36f3e71 100644
--- a/host/examples/CMakeLists.txt
+++ b/host/examples/CMakeLists.txt
@@ -25,6 +25,9 @@ TARGET_LINK_LIBRARIES(rx_timed_samples uhd)
 ADD_EXECUTABLE(rx_to_file rx_to_file.cpp)
 TARGET_LINK_LIBRARIES(rx_to_file uhd)
 
+ADD_EXECUTABLE(rx_to_udp rx_to_udp.cpp)
+TARGET_LINK_LIBRARIES(rx_to_udp uhd)
+
 ADD_EXECUTABLE(test_async_messages test_async_messages.cpp)
 TARGET_LINK_LIBRARIES(test_async_messages uhd)
 
@@ -48,6 +51,7 @@ INSTALL(TARGETS
     tx_timed_samples
     tx_from_file
     rx_to_file
+    rx_to_udp
     tx_waveforms
     RUNTIME DESTINATION ${PKG_DATA_DIR}/examples
 )
diff --git a/host/examples/rx_to_udp.cpp b/host/examples/rx_to_udp.cpp
new file mode 100644
index 000000000..34b278599
--- /dev/null
+++ b/host/examples/rx_to_udp.cpp
@@ -0,0 +1,167 @@
+//
+// Copyright 2010 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/simple_usrp.hpp>
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <iostream>
+#include <fstream>
+#include <complex>
+
+#include "sys/types.h"
+#include "sys/socket.h"
+#include "arpa/inet.h"
+
+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;
+    time_t seconds_in_future;
+    size_t total_num_samps;
+    double rx_rate, freq;
+    short srv_port;
+    std::string srv_ip;
+
+    //setup the program options
+    po::options_description desc("Allowed options");
+    desc.add_options()
+        ("help", "help message")
+        ("args", po::value<std::string>(&args)->default_value(""), "simple uhd device address args")
+        ("secs", po::value<time_t>(&seconds_in_future)->default_value(3), "number of seconds in the future to receive")
+        ("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to receive")
+        ("rxrate", po::value<double>(&rx_rate)->default_value(100e6/16), "rate of incoming samples")
+        ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
+        ("port", po::value<short>(&srv_port)->default_value(7124), "server port")
+        ("ip", po::value<std::string>(&srv_ip)->default_value("192.168.1.10"), "server ip")
+        ("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 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::simple_usrp::sptr sdev = uhd::usrp::simple_usrp::make(args);
+    uhd::device::sptr dev = sdev->get_device();
+    std::cout << boost::format("Using Device: %s") % sdev->get_pp_string() << std::endl;
+
+    //set properties on the device
+    std::cout << boost::format("Setting RX Rate: %f Msps...") % (rx_rate/1e6) << std::endl;
+    sdev->set_rx_rate(rx_rate);
+    std::cout << boost::format("Actual RX Rate: %f Msps...") % (sdev->get_rx_rate()/1e6) << std::endl;
+    std::cout << boost::format("Setting device timestamp to 0...") << std::endl;
+    sdev->set_rx_freq(freq);
+    sdev->set_time_now(uhd::time_spec_t(0.0));
+
+    uhd::gain_range_t rx_gain = sdev->get_rx_gain_range();
+    std::cout << "Setting RX Gain to: " << rx_gain.max << std::endl;
+    sdev->set_rx_gain(rx_gain.max);
+
+    sleep(1);
+    std::cout << "LO Locked = " << sdev->get_rx_lo_locked() << std::endl;
+
+    //setup streaming
+    std::cout << std::endl;
+    std::cout << boost::format(
+        "Begin streaming %u samples, %d 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);
+    sdev->issue_stream_cmd(stream_cmd);
+
+    //loop until total number of samples reached
+    size_t num_acc_samps = 0; //number of accumulated samples
+    uhd::rx_metadata_t md;
+    std::vector<std::complex<float> > buff(368);
+    std::ofstream outfile("out.dat", std::ofstream::binary);
+
+    int s;
+    struct sockaddr_in si_other;
+    if ((s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
+	std::cout << "Failid to open socket." << std::endl;
+    	return -1;
+    }	
+
+    memset((char *) &si_other, 0, sizeof(si_other));
+    si_other.sin_family = AF_INET;
+    si_other.sin_port = htons(srv_port);
+    if (inet_aton(srv_ip.c_str(), &si_other.sin_addr) == 0) {
+	    std::cout << "Bad inet addr: " << srv_ip << std::endl;
+	    return -1;
+    }
+
+    while(num_acc_samps < total_num_samps){
+        size_t num_rx_samps = dev->recv(
+            &buff.front(), buff.size(), md,
+            uhd::io_type_t::COMPLEX_FLOAT32,
+            uhd::device::RECV_MODE_ONE_PACKET
+        );
+
+        //handle the error codes
+        switch(md.error_code){
+        case uhd::rx_metadata_t::ERROR_CODE_NONE:
+            break;
+
+        case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
+            if (num_acc_samps == 0) continue;
+            std::cout << boost::format(
+                "Got timeout before all samples received, possible packet loss, exiting loop..."
+            ) << std::endl;
+            goto done_loop;
+
+        default:
+            std::cout << boost::format(
+                "Got error code 0x%x, exiting loop..."
+            ) % md.error_code << std::endl;
+            goto done_loop;
+        }
+
+//	outfile.write((const char*)&buff[0], num_rx_samps * sizeof(std::complex<short>));
+	if (sendto(s, (const char *)&buff[0], num_rx_samps * sizeof(std::complex<float>), 0 , (const sockaddr *)&si_other, sizeof(si_other)) == -1)
+		std::cout << "Sendto failed." << std::endl;
+
+        if(verbose) std::cout << boost::format(
+            "Got 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;
+    } done_loop:
+
+    outfile.close();
+
+    //finished
+    std::cout << std::endl << "Done!" << std::endl << std::endl;
+
+    return 0;
+}