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);
}
/*!
* 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;
}
}
/*!
* 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;
}
}
/***********************************************************************
* 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;
}
}
}
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;
}
/***********************************************************************
* 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;
}
}
}