diff options
| -rw-r--r-- | host/docs/usrp2.rst | 15 | ||||
| -rw-r--r-- | host/examples/CMakeLists.txt | 4 | ||||
| -rw-r--r-- | host/examples/pps_test.cpp | 86 |
3 files changed, 105 insertions, 0 deletions
diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst index 3ac326f58..0d48209be 100644 --- a/host/docs/usrp2.rst +++ b/host/docs/usrp2.rst @@ -205,3 +205,18 @@ Example, set the args string to the following: :: addr=192.168.10.2, recv_buff_size=100e6 + +------------------------------------------------------------------------ +Hardware setup notes +------------------------------------------------------------------------ + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Ref Clock - 10MHz +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Using an external 10MHz reference clock requires a signal level between +5dBm and +20dBm at 10MHz applied to the Ref Clock SMA port on the front panel. + + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +PPS - Pulse Per Second +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Using a PPS signal for timestamp synchronization requires a 5Vpp square wave signal 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; + } +} |