Merge branch 'usrp1' of ettus.sourcerepo.com:ettus/uhdpriv into usrp1

3 files changed, 105 insertions, 4 deletions

diff --git a/host/examples/CMakeLists.txt b/host/examples/CMakeLists.txt
index c3bbbcd04..5b241e284 100644
--- a/host/examples/CMakeLists.txt
+++ b/host/examples/CMakeLists.txt
@@ -28,10 +28,14 @@ TARGET_LINK_LIBRARIES(tx_timed_samples uhd)
 ADD_EXECUTABLE(tx_waveforms tx_waveforms.cpp)
 TARGET_LINK_LIBRARIES(tx_waveforms uhd)
 
+ADD_EXECUTABLE(pps_test pps_test.cpp)
+TARGET_LINK_LIBRARIES(pps_test uhd)
+
 INSTALL(TARGETS
     benchmark_rx_rate
     rx_timed_samples
     tx_timed_samples
     tx_waveforms
+    pps_test
     RUNTIME DESTINATION ${PKG_DATA_DIR}/examples
 )
diff --git a/host/examples/pps_test.cpp b/host/examples/pps_test.cpp
new file mode 100644
index 000000000..c25cbe94f
--- /dev/null
+++ b/host/examples/pps_test.cpp
@@ -0,0 +1,86 @@
+//
+// 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 <boost/thread.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;
+    float seconds;
+
+    //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")
+    ;
+    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 PPS Test %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::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 a known time value
+    std::cout << "Set time to known value (100.0) without regard to pps:" << std::endl;
+    sdev->set_time_now(uhd::time_spec_t(100.0));
+    boost::this_thread::sleep(boost::posix_time::seconds(1));
+    std::cout << boost::format("Reading time 1 second later: %f\n") % (sdev->get_time_now().get_full_secs()) << std::endl;
+
+    //store the time to see if PPS resets it
+    seconds = sdev->get_time_now().get_full_secs();
+
+    //set a known time at next PPS, check that time increments
+    uhd::time_spec_t time_spec = uhd::time_spec_t(0.0);
+    std::cout << "Set time to known value (0.0) at next pps:" << std::endl;
+    sdev->set_time_next_pps(time_spec);
+    boost::this_thread::sleep(boost::posix_time::seconds(1));
+    std::cout << boost::format("Reading time 1 second later: %f\n") % (sdev->get_time_now().get_full_secs()) << std::endl;
+
+    //finished
+    if (seconds > sdev->get_time_now().get_full_secs()){
+        std::cout << std::endl << "Success!" << std::endl << std::endl;
+        return 0;
+    } else {
+        std::cout << std::endl << "Failed!" << std::endl << std::endl 
+            << "If you expected PPS to work:" << std::endl
+            << "\tsee Device App Notes for PPS level information"
+            << std::endl << std::endl;
+        return -1;
+    }
+}
diff --git a/host/examples/tx_waveforms.cpp b/host/examples/tx_waveforms.cpp
index 9886000b1..3f319cf68 100644
--- a/host/examples/tx_waveforms.cpp
+++ b/host/examples/tx_waveforms.cpp
@@ -17,6 +17,7 @@
 
 #include <uhd/utils/thread_priority.hpp>
 #include <uhd/utils/safe_main.hpp>
+#include <uhd/utils/static.hpp>
 #include <uhd/usrp/simple_usrp.hpp>
 #include <boost/program_options.hpp>
 #include <boost/thread/thread_time.hpp> //system time
@@ -44,9 +45,16 @@ float gen_ramp(float x){
     return std::fmod(x, 1)*2 - 1;
 }
 
+#define sine_table_len 2048
+static float sine_table[sine_table_len];
+UHD_STATIC_BLOCK(gen_sine_table){
+    static const float m_pi = std::acos(float(-1));
+    for (size_t i = 0; i < sine_table_len; i++)
+        sine_table[i] = std::sin((2*m_pi*i)/sine_table_len);
+}
+
 float gen_sine(float x){
-    static const float two_pi = 2*std::acos(float(-1));
-    return std::sin(x*two_pi);
+    return sine_table[size_t(x*sine_table_len)%sine_table_len];
 }
 
 int UHD_SAFE_MAIN(int argc, char *argv[]){
@@ -65,11 +73,11 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("args", po::value<std::string>(&args)->default_value(""), "simple uhd device address args")
         ("duration", po::value<size_t>(&total_duration)->default_value(3), "number of seconds to transmit")
         ("spb", po::value<size_t>(&spb)->default_value(10000), "samples per buffer")
-        ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of outgoing samples")
+        ("rate", po::value<double>(&rate)->default_value(1.5e6), "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 the waveform")
         ("gain", po::value<float>(&gain)->default_value(float(0)), "gain for the RF chain")
-        ("wave-type", po::value<std::string>(&wave_type)->default_value("SINE"), "waveform type (CONST, SQUARE, RAMP, SINE)")
+        ("wave-type", po::value<std::string>(&wave_type)->default_value("CONST"), "waveform type (CONST, SQUARE, RAMP, SINE)")
         ("wave-freq", po::value<double>(&wave_freq)->default_value(0), "waveform frequency in Hz")
     ;
     po::variables_map vm;
@@ -113,6 +121,9 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     if (std::abs(wave_freq) > sdev->get_tx_rate()/2){
         throw std::runtime_error("wave freq out of Nyquist zone");
     }
+    if (sdev->get_tx_rate()/std::abs(wave_freq) > sine_table_len/2 and wave_type == "SINE"){
+        throw std::runtime_error("sine freq too small for table");
+    }
 
     //store the generator function for the selected waveform
     boost::function<float(float)> wave_gen;