Exemplo n.º 1
0
void flush_recv(uhd::rx_streamer::sptr rx_stream){
    std::vector<std::complex<float> > buff(rx_stream->get_max_num_samps());
    uhd::rx_metadata_t md;

    do{
        rx_stream->recv(&buff.front(), buff.size(), md);
    } while (md.error_code != uhd::rx_metadata_t::ERROR_CODE_TIMEOUT);
}
Exemplo n.º 2
0
/*!
 * Test the broken chain message:
 *    Issue a stream command with num samps and more.
 *    We expect to get an inline broken chain message.
 */
bool test_broken_chain_message(UHD_UNUSED(uhd::usrp::multi_usrp::sptr usrp), uhd::rx_streamer::sptr rx_stream, uhd::tx_streamer::sptr){
    std::cout << "Test broken chain message... " << std::flush;

    uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_MORE);
    stream_cmd.stream_now = true;
    stream_cmd.num_samps = rx_stream->get_max_num_samps();
    rx_stream->issue_stream_cmd(stream_cmd);

    std::vector<std::complex<float> > buff(rx_stream->get_max_num_samps());
    uhd::rx_metadata_t md;

    rx_stream->recv( //once for the requested samples
        &buff.front(), buff.size(), md
    );

    rx_stream->recv( //again for the inline message
        &buff.front(), buff.size(), md
    );

    switch(md.error_code){
    case uhd::rx_metadata_t::ERROR_CODE_BROKEN_CHAIN:
        std::cout << boost::format(
            "success:\n"
            "    Got error code broken chain message.\n"
        ) << std::endl;
        return true;

    case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
        std::cout << boost::format(
            "failed:\n"
            "    Inline message recv timed out.\n"
        ) << std::endl;
        return false;

    default:
        std::cout << boost::format(
            "failed:\n"
            "    Got unexpected error code 0x%x.\n"
        ) % md.error_code << std::endl;
        return false;
    }
}
Exemplo n.º 3
0
/*!
 * Test the late command message:
 *    Issue a stream command with a time that is in the past.
 *    We expect to get an inline late command message.
 */
bool test_late_command_message(uhd::usrp::multi_usrp::sptr usrp, uhd::rx_streamer::sptr rx_stream, uhd::tx_streamer::sptr){
    std::cout << "Test late command message... " << std::flush;

    usrp->set_time_now(uhd::time_spec_t(200.0)); //set time

    uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
    stream_cmd.num_samps = rx_stream->get_max_num_samps();
    stream_cmd.stream_now = false;
    stream_cmd.time_spec = uhd::time_spec_t(100.0); //time in the past
    rx_stream->issue_stream_cmd(stream_cmd);

    std::vector<std::complex<float> > buff(rx_stream->get_max_num_samps());
    uhd::rx_metadata_t md;

    const size_t nsamps = rx_stream->recv(
        &buff.front(), buff.size(), md
    );

    switch(md.error_code){
    case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND:
        std::cout << boost::format(
            "success:\n"
            "    Got error code late command message.\n"
        ) << std::endl;
        return true;

    case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
        std::cout << boost::format(
            "failed:\n"
            "    Inline message recv timed out.\n"
        ) << std::endl;
        return false;

    default:
        std::cout << boost::format(
            "failed:\n"
            "    Got unexpected error code 0x%x, nsamps %u.\n"
        ) % md.error_code % nsamps << std::endl;
        return false;
    }
}
Exemplo n.º 4
0
/***********************************************************************
 * RX Hammer
 **********************************************************************/
void rx_hammer(uhd::usrp::multi_usrp::sptr usrp, const std::string &rx_cpu, uhd::rx_streamer::sptr rx_stream){
    uhd::set_thread_priority_safe();

    //print pre-test summary
    std::cout << boost::format(
        "Testing receive rate %f Msps"
    ) % (usrp->get_rx_rate()/1e6) << std::endl;

    //setup variables and allocate buffer
    uhd::rx_metadata_t md;
    const size_t max_samps_per_packet = rx_stream->get_max_num_samps();
    std::vector<char> buff(max_samps_per_packet*uhd::convert::get_bytes_per_item(rx_cpu));
    std::vector<void *> buffs;
    for (size_t ch = 0; ch < rx_stream->get_num_channels(); ch++)
        buffs.push_back(&buff.front()); //same buffer for each channel
    bool had_an_overflow = false;
    uhd::time_spec_t last_time;
    const double rate = usrp->get_rx_rate();
    double timeout = 1;

    uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
    cmd.time_spec = usrp->get_time_now() + uhd::time_spec_t(0.05);
    cmd.stream_now = (buffs.size() == 1);
    srand( time(NULL) );

    while (not boost::this_thread::interruption_requested()){
        cmd.num_samps = rand() % 100000;
        rx_stream->issue_stream_cmd(cmd);
        num_rx_samps += rx_stream->recv(buffs, max_samps_per_packet, md, timeout, true);

        //handle the error codes
        switch(md.error_code){
        case uhd::rx_metadata_t::ERROR_CODE_NONE:
            if (had_an_overflow){
                had_an_overflow = false;
                num_dropped_samps += boost::math::iround((md.time_spec - last_time).get_real_secs()*rate);
            }
            break;

        case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
            had_an_overflow = true;
            last_time = md.time_spec;
            if (!md.out_of_sequence)
                num_overflows++;
            break;

        default:
            std::cerr << "Receiver error: " << md.strerror() << std::endl;
            std::cerr << "Unexpected error on recv, continuing..." << std::endl;
            break;
        }
    }
}
Exemplo n.º 5
0
int uhd_device::open(const std::string &args, bool extref)
{
	// Find UHD devices
	uhd::device_addr_t addr(args);
	uhd::device_addrs_t dev_addrs = uhd::device::find(addr);
	if (dev_addrs.size() == 0) {
		LOG(ALERT) << "No UHD devices found with address '" << args << "'";
		return -1;
	}

	// Use the first found device
	LOG(INFO) << "Using discovered UHD device " << dev_addrs[0].to_string();
	try {
		usrp_dev = uhd::usrp::multi_usrp::make(dev_addrs[0]);
	} catch(...) {
		LOG(ALERT) << "UHD make failed, device " << dev_addrs[0].to_string();
		return -1;
	}

	// Check for a valid device type and set bus type
	if (!parse_dev_type())
		return -1;

	if (extref)
		set_ref_clk(true);

	// Create TX and RX streamers
	uhd::stream_args_t stream_args("sc16");
	tx_stream = usrp_dev->get_tx_stream(stream_args);
	rx_stream = usrp_dev->get_rx_stream(stream_args);

	// Number of samples per over-the-wire packet
	tx_spp = tx_stream->get_max_num_samps();
	rx_spp = rx_stream->get_max_num_samps();

	// Set rates
	double _tx_rate = select_rate(dev_type, sps);
	double _rx_rate = _tx_rate / sps;
	if ((_tx_rate > 0.0) && (set_rates(_tx_rate, _rx_rate) < 0))
		return -1;

	// Create receive buffer
	size_t buf_len = SAMPLE_BUF_SZ / sizeof(uint32_t);
	rx_smpl_buf = new smpl_buf(buf_len, rx_rate);

	// Set receive chain sample offset 
	double offset = get_dev_offset(dev_type, sps);
	if (offset == 0.0) {
		LOG(ERR) << "Unsupported configuration, no correction applied";
		ts_offset = 0;
	} else  {
		ts_offset = (TIMESTAMP) (offset * rx_rate);
	}

	// Initialize and shadow gain values 
	init_gains();

	// Print configuration
	LOG(INFO) << "\n" << usrp_dev->get_pp_string();

	switch (dev_type) {
	case B100:
		return RESAMP_64M;
	case USRP2:
	case X3XX:
		return RESAMP_100M;
	}

	return NORMAL;
}
Exemplo n.º 6
0
/***********************************************************************
 * Benchmark RX Rate
 **********************************************************************/
void benchmark_rx_rate(
        uhd::usrp::multi_usrp::sptr usrp,
        const std::string &rx_cpu,
        uhd::rx_streamer::sptr rx_stream,
        bool random_nsamps,
        const boost::posix_time::ptime &start_time,
        std::atomic<bool>& burst_timer_elapsed
) {
    uhd::set_thread_priority_safe();

    //print pre-test summary
    std::cout << boost::format(
        "[%s] Testing receive rate %f Msps on %u channels"
    ) % NOW() % (usrp->get_rx_rate()/1e6) % rx_stream->get_num_channels() << std::endl;

    //setup variables and allocate buffer
    uhd::rx_metadata_t md;
    const size_t max_samps_per_packet = rx_stream->get_max_num_samps();
    std::vector<char> buff(max_samps_per_packet*uhd::convert::get_bytes_per_item(rx_cpu));
    std::vector<void *> buffs;
    for (size_t ch = 0; ch < rx_stream->get_num_channels(); ch++)
        buffs.push_back(&buff.front()); //same buffer for each channel
    bool had_an_overflow = false;
    uhd::time_spec_t last_time;
    const double rate = usrp->get_rx_rate();

    uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
    cmd.time_spec = usrp->get_time_now() + uhd::time_spec_t(INIT_DELAY);
    cmd.stream_now = (buffs.size() == 1);
    rx_stream->issue_stream_cmd(cmd);

    const float burst_pkt_time =
        std::max<float>(0.100f, (2 * max_samps_per_packet/rate));
    float recv_timeout = burst_pkt_time + INIT_DELAY;

    bool stop_called = false;
    while (true) {
        //if (burst_timer_elapsed.load(boost::memory_order_relaxed) and not stop_called) {
        if (burst_timer_elapsed and not stop_called) {
            rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
            stop_called = true;
        }
        if (random_nsamps) {
            cmd.num_samps = rand() % max_samps_per_packet;
            rx_stream->issue_stream_cmd(cmd);
        }
        try {
            num_rx_samps += rx_stream->recv(buffs, max_samps_per_packet, md, recv_timeout)*rx_stream->get_num_channels();
            recv_timeout = burst_pkt_time;
        }
        catch (uhd::io_error &e) {
            std::cerr << "[" << NOW() << "] Caught an IO exception. " << std::endl;
            std::cerr << e.what() << std::endl;
            return;
        }

        //handle the error codes
        switch(md.error_code){
        case uhd::rx_metadata_t::ERROR_CODE_NONE:
            if (had_an_overflow) {
                had_an_overflow = false;
                const long dropped_samps =
                    (md.time_spec - last_time).to_ticks(rate);
                if (dropped_samps < 0) {
                    std::cerr
                        << "[" << NOW() << "] Timestamp after overrun recovery "
                           "ahead of error timestamp! Unable to calculate "
                           "number of dropped samples."
                           "(Delta: " << dropped_samps << " ticks)\n";
                }
                num_dropped_samps += std::max<long>(1, dropped_samps);
            }
            if ((burst_timer_elapsed or stop_called) and md.end_of_burst) {
                return;
            }
            break;

        // ERROR_CODE_OVERFLOW can indicate overflow or sequence error
        case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
            last_time = md.time_spec;
            had_an_overflow = true;
            // check out_of_sequence flag to see if it was a sequence error or overflow
            if (!md.out_of_sequence) {
                num_overruns++;
            } else {
                num_seqrx_errors++;
                std::cerr << "[" << NOW() << "] Detected Rx sequence error." << std::endl;
            }
            break;

        case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND:
            std::cerr << "[" << NOW() << "] Receiver error: " << md.strerror() << ", restart streaming..."<< std::endl;
            num_late_commands++;
            // Radio core will be in the idle state. Issue stream command to restart streaming.
            cmd.time_spec = usrp->get_time_now() + uhd::time_spec_t(0.05);
            cmd.stream_now = (buffs.size() == 1);
            rx_stream->issue_stream_cmd(cmd);
            break;

        case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
            if (burst_timer_elapsed) {
                return;
            }
            std::cerr << "[" << NOW() << "] Receiver error: " << md.strerror() << ", continuing..." << std::endl;
            num_timeouts_rx++;
            break;

            // Otherwise, it's an error
        default:
            std::cerr << "[" << NOW() << "] Receiver error: " << md.strerror() << std::endl;
            std::cerr << "[" << NOW() << "] Unexpected error on recv, continuing..." << std::endl;
            break;
        }
    }
}