예제 #1
0
int uhd_device::check_rx_md_err(uhd::rx_metadata_t &md, ssize_t num_smpls)
{
	uhd::time_spec_t ts;

	if (!num_smpls) {
		LOG(ERR) << str_code(md);

		switch (md.error_code) {
		case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
			LOG(ALERT) << "UHD: Receive timed out";
			return ERROR_UNRECOVERABLE;
		case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
		case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND:
		case uhd::rx_metadata_t::ERROR_CODE_BROKEN_CHAIN:
		case uhd::rx_metadata_t::ERROR_CODE_BAD_PACKET:
		default:
			return ERROR_UNHANDLED;
		}
	}

	// Missing timestamp
	if (!md.has_time_spec) {
		LOG(ALERT) << "UHD: Received packet missing timestamp";
		return ERROR_UNRECOVERABLE;
	}

	ts = md.time_spec;

	// Monotonicity check
	if (ts < prev_ts) {
		LOG(ALERT) << "UHD: Loss of monotonic time";
		LOG(ALERT) << "Current time: " << ts.get_real_secs() << ", " 
			   << "Previous time: " << prev_ts.get_real_secs();
		return ERROR_TIMING;
	} else {
		prev_ts = ts;
	}

	return 0;
}
예제 #2
0
int UHD_SAFE_MAIN(int argc, char *argv[]){
    uhd::set_thread_priority_safe();

    std::string args;

    //Set up program options
    po::options_description desc("Allowed options");
    desc.add_options()
        ("help", "help message")
        ("args", po::value<std::string>(&args)->default_value(""), "Specify a single USRP.")
    ;
    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("Query GPSDO Sensors %s") % desc << std::endl;
        return ~0;
    }

    //Create a USRP device
    std::cout << boost::format("\nCreating the USRP device with: %s...\n") % args;
    uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args);
    std::cout << boost::format("Using Device: %s\n") % usrp->get_pp_string();

	//Helpful notes
	std::cout << boost::format("**************************************Helpful Notes on Clock/PPS Selection**************************************\n");
	std::cout << boost::format("As you can see, the default 10 MHz Reference and 1 PPS signals are now from the GPSDO.\n");
	std::cout << boost::format("If you would like to use the internal reference(TCXO) in other applications, you must configure that explicitly.\n");
	std::cout << boost::format("You can no longer select the external SMAs for 10 MHz or 1 PPS signaling.\n");
	std::cout << boost::format("****************************************************************************************************************\n");

	
	//Verify GPS sensors are present (i.e. EEPROM has been burnt)
	std::vector<std::string> sensor_names = usrp->get_mboard_sensor_names(0);

    if(std::find(sensor_names.begin(), sensor_names.end(), "gps_locked") == sensor_names.end()){
        std::cout << boost::format("\ngps_locked sensor not found.  This could mean that you have not installed the GPSDO correctly.\n\n");
        std::cout << boost::format("Visit this page if the problem persists:\n");
        std::cout << boost::format("http://files.ettus.com/uhd_docs/manual/html/gpsdo.html\n\n");
        exit(1);
    }

	//Check for GPS lock
	uhd::sensor_value_t gps_locked = usrp->get_mboard_sensor("gps_locked",0);
	std::cout << boost::format("%s\n") % gps_locked.to_pp_string();
	if(gps_locked.to_pp_string().find("unlocked") != std::string::npos) {
			std::cout << boost::format("GPS does not have lock. Wait a few minutes and try again.\n");
			std::cout << boost::format("NMEA strings and device time may not be accurate until lock is achieved.\n\n");
	}
	else std::cout << boost::format("GPS Locked\n");
	
	//Check for 10 MHz lock
	if(std::find(sensor_names.begin(), sensor_names.end(), "ref_locked") != sensor_names.end()){
        uhd::sensor_value_t gps_locked = usrp->get_mboard_sensor("ref_locked",0);
	std::cout << boost::format("%s\n") % gps_locked.to_pp_string();
	if(gps_locked.to_pp_string().find("unlocked") != std::string::npos){
			std::cout << boost::format("USRP NOT Locked to GPSDO 10 MHz Reference.\n");
			std::cout << boost::format("Double check installation instructions: https://www.ettus.com/content/files/gpsdo-kit_2.pdf\n\n");
		}
		else std::cout << boost::format("USRP Locked to GPSDO 10 MHz Reference.\n");
    }
    else std::cout << boost::format("ref_locked sensor not present on this board.\n");	
	
    //Check PPS and compare UHD device time to GPS time
	uhd::sensor_value_t gps_time = usrp->get_mboard_sensor("gps_time");
	const uhd::time_spec_t last_pps_time = usrp->get_time_last_pps();
	if(int(boost::math::iround(last_pps_time.get_real_secs())) == gps_time.to_int())
	{
		std::cout << boost::format("GPS and UHD Device time are aligned.\n");
	}
	else
	{
		std::cout << boost::format("\nGPS and UHD Device time are NOT aligned. Try re-running the program. Double check 1 PPS connection from GPSDO.\n\n");
	}
	
	//print NMEA strings
	std::cout << boost::format("Printing available NMEA strings:\n");
	uhd::sensor_value_t gga_string = usrp->get_mboard_sensor("gps_gpgga");
	uhd::sensor_value_t rmc_string = usrp->get_mboard_sensor("gps_gprmc");
    std::cout << boost::format("%s\n%s\n%s\n") % gga_string.to_pp_string() % rmc_string.to_pp_string() % gps_time.to_pp_string();
	std::cout << boost::format("UHD Device time: %.0f seconds\n") % boost::math::iround(last_pps_time.get_real_secs());
	
    //finished
    std::cout << boost::format("\nDone!\n\n");

    return 0;
}
예제 #3
0
TIMESTAMP convert_time(uhd::time_spec_t ts, double rate)
{
	TIMESTAMP ticks = ts.get_full_secs() * rate;
	return ts.get_tick_count(rate) + ticks;
}
예제 #4
0
template<typename samp_type> void recv_to_file(
    uhd::usrp::multi_usrp::sptr usrp,
    const uhd::io_type_t &io_type,
    std::ofstream &outfile,
    size_t samps_per_buff,
	uhd::time_spec_t send_time
){
    uhd::rx_metadata_t md;
    std::vector<samp_type> buff(samps_per_buff);

	//a packet has 362 samples
	send_time = send_time + uhd::time_spec_t(1.0);
	uhd::time_spec_t front_time, end_time;
	int index;
    
    size_t num_rx_samps = usrp->get_device()->recv(
        &buff.front(), buff.size(), md, io_type,
//		uhd::device::RECV_MODE_FULL_BUFF
        uhd::device::RECV_MODE_ONE_PACKET
    );

    if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_TIMEOUT) return;
    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));
    }

	front_time = md.time_spec;
	end_time = md.time_spec + uhd::time_spec_t((double)(num_rx_samps-1)*decimation/100.0e6);

//outfile.write((const char*)&buff.front(), num_rx_samps*sizeof(samp_type));

	if((send_time-front_time).get_real_secs() < 0 && (end_time-send_time).get_real_secs() >=0 ){
		outfile.write((const char*)&buff.front(), num_rx_samps*sizeof(samp_type));
	}else{
		if( (send_time-front_time).get_real_secs() >=0 && (end_time-send_time).get_real_secs() >=0 ){
			index = (send_time-front_time).get_frac_secs()/((double)decimation/100.0e6);
			outfile.write((const char*)&buff.at(index), (num_rx_samps-index)*sizeof(samp_type));
			printf("start to save at %f with index %d, send_time %f  \n",front_time.get_real_secs(),index,send_time.get_real_secs());
			printf("timestamp %f tick %ld\n",(front_time+uhd::time_spec_t((double)index*(double)decimation/100.0e6)).get_real_secs(), (front_time+uhd::time_spec_t((double)index*(double)decimation/100.0e6)).get_tick_count(100e6));
		}
	}
    
}
예제 #5
0
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);
    rx_stream->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, 1.0);
    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 EXIT_SUCCESS;
}
예제 #6
0
int SampleBuffer::read(void *buf, int len, uhd::time_spec_t ts)
{
	return read(buf, len, ts.to_ticks(clock_rate));
}
예제 #7
0
int SampleBuffer::avail_smpls(uhd::time_spec_t ts) const
{
	return avail_smpls(ts.to_ticks(clock_rate));
}