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-rw-r--r--host/examples/test_timed_commands.cpp129
-rw-r--r--host/lib/usrp/usrp2/usrp2_impl.cpp13
2 files changed, 136 insertions, 6 deletions
diff --git a/host/examples/test_timed_commands.cpp b/host/examples/test_timed_commands.cpp
new file mode 100644
index 000000000..34c83dfd6
--- /dev/null
+++ b/host/examples/test_timed_commands.cpp
@@ -0,0 +1,129 @@
+//
+// Copyright 2012 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/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;
+
+ //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")
+ ;
+ 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 Test Timed Commands %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::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args);
+ std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
+
+ //check if timed commands are supported
+ std::cout << std::endl;
+ std::cout << "Testing support for timed commands on this hardware... " << std::flush;
+ try{
+ usrp->set_command_time(uhd::time_spec_t(0.0));
+ usrp->clear_command_time();
+ }
+ catch (const std::exception &e){
+ std::cout << "fail" << std::endl;
+ std::cerr << "Got exception: " << e.what() << std::endl;
+ std::cerr << "Timed commands are not supported on this hardware." << std::endl;
+ return ~0;
+ }
+ std::cout << "pass" << std::endl;
+
+ //readback time really fast, time diff is small
+ std::cout << std::endl;
+ std::cout << "Perform fast readback of registers:" << std::endl;
+ uhd::time_spec_t total_time;
+ for (size_t i = 0; i < 100; i++){
+ const uhd::time_spec_t t0 = usrp->get_time_now();
+ const uhd::time_spec_t t1 = usrp->get_time_now();
+ total_time += (t1-t0);
+ }
+ std::cout << boost::format(
+ "Difference between paired reads: %f us"
+ ) % (total_time.get_real_secs()/100*1e6) << std::endl;
+
+ //use a timed command to start a stream at a specific time
+ //this is not the right way start streaming at time x,
+ //but it should approximate it within control RTT/2
+ //setup streaming
+ std::cout << std::endl;
+ std::cout << "About to start streaming using timed command:" << std::endl;
+
+ //create a receive streamer
+ uhd::stream_args_t stream_args("fc32"); //complex floats
+ uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);
+
+ uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
+ stream_cmd.num_samps = 100;
+ stream_cmd.stream_now = true;
+ const uhd::time_spec_t stream_time = usrp->get_time_now() + uhd::time_spec_t(0.1);
+ usrp->set_command_time(stream_time);
+ usrp->issue_stream_cmd(stream_cmd);
+ usrp->clear_command_time();
+
+ //meta-data will be filled in by recv()
+ uhd::rx_metadata_t md;
+
+ //allocate buffer to receive with samples
+ std::vector<std::complex<float> > buff(stream_cmd.num_samps);
+
+ const size_t num_rx_samps = rx_stream->recv(&buff.front(), buff.size(), md);
+ if (md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE){
+ throw std::runtime_error(str(boost::format(
+ "Unexpected error code 0x%x"
+ ) % md.error_code));
+ }
+ std::cout << boost::format(
+ "Received 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;
+ std::cout << boost::format(
+ "Stream time was: %u full secs, %f frac secs"
+ ) % stream_time.get_full_secs() % stream_time.get_frac_secs() << std::endl;
+ std::cout << boost::format(
+ "Difference between stream time and first packet: %f us"
+ ) % ((md.time_spec-stream_time).get_real_secs()/100*1e6) << std::endl;
+
+ //finished
+ std::cout << std::endl << "Done!" << std::endl << std::endl;
+
+ return 0;
+}
diff --git a/host/lib/usrp/usrp2/usrp2_impl.cpp b/host/lib/usrp/usrp2/usrp2_impl.cpp
index cbe64635b..ec6a82572 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.cpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.cpp
@@ -727,24 +727,25 @@ meta_range_t usrp2_impl::get_tx_dsp_freq_range(const std::string &mb){
}
void usrp2_impl::update_clock_source(const std::string &mb, const std::string &source){
+ //NOTICE: U2_REG_MISC_CTRL_CLOCK is on the wb clock, and cannot be set from fifo_ctrl
//clock source ref 10mhz
switch(_mbc[mb].iface->get_rev()){
case usrp2_iface::USRP_N200:
case usrp2_iface::USRP_N210:
case usrp2_iface::USRP_N200_R4:
case usrp2_iface::USRP_N210_R4:
- if (source == "internal") _mbc[mb].fifo_ctrl->poke32(U2_REG_MISC_CTRL_CLOCK, 0x12);
- else if (source == "external") _mbc[mb].fifo_ctrl->poke32(U2_REG_MISC_CTRL_CLOCK, 0x1C);
- else if (source == "mimo") _mbc[mb].fifo_ctrl->poke32(U2_REG_MISC_CTRL_CLOCK, 0x15);
+ if (source == "internal") _mbc[mb].iface->poke32(U2_REG_MISC_CTRL_CLOCK, 0x12);
+ else if (source == "external") _mbc[mb].iface->poke32(U2_REG_MISC_CTRL_CLOCK, 0x1C);
+ else if (source == "mimo") _mbc[mb].iface->poke32(U2_REG_MISC_CTRL_CLOCK, 0x15);
else throw uhd::value_error("unhandled clock configuration reference source: " + source);
_mbc[mb].clock->enable_external_ref(true); //USRP2P has an internal 10MHz TCXO
break;
case usrp2_iface::USRP2_REV3:
case usrp2_iface::USRP2_REV4:
- if (source == "internal") _mbc[mb].fifo_ctrl->poke32(U2_REG_MISC_CTRL_CLOCK, 0x10);
- else if (source == "external") _mbc[mb].fifo_ctrl->poke32(U2_REG_MISC_CTRL_CLOCK, 0x1C);
- else if (source == "mimo") _mbc[mb].fifo_ctrl->poke32(U2_REG_MISC_CTRL_CLOCK, 0x15);
+ if (source == "internal") _mbc[mb].iface->poke32(U2_REG_MISC_CTRL_CLOCK, 0x10);
+ else if (source == "external") _mbc[mb].iface->poke32(U2_REG_MISC_CTRL_CLOCK, 0x1C);
+ else if (source == "mimo") _mbc[mb].iface->poke32(U2_REG_MISC_CTRL_CLOCK, 0x15);
else throw uhd::value_error("unhandled clock configuration reference source: " + source);
_mbc[mb].clock->enable_external_ref(source != "internal");
break;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 17:58:55 +0000