/***********************************************************************
* Transmit thread
**********************************************************************/
static void tx_thread(uhd::usrp::multi_usrp::sptr usrp, const double tx_wave_freq, const double tx_wave_ampl)
{
uhd::set_thread_priority_safe();
// set max TX gain
usrp->set_tx_gain(usrp->get_tx_gain_range().stop());
//create a transmit streamer
uhd::stream_args_t stream_args("fc32"); //complex floats
uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);
//setup variables and allocate buffer
uhd::tx_metadata_t md;
md.has_time_spec = false;
std::vector<samp_type> buff(tx_stream->get_max_num_samps()*10);
//values for the wave table lookup
size_t index = 0;
const double tx_rate = usrp->get_tx_rate();
const size_t step = boost::math::iround(wave_table_len * tx_wave_freq / tx_rate);
wave_table table(tx_wave_ampl);
//fill buff and send until interrupted
while (not boost::this_thread::interruption_requested())
{
for (size_t i = 0; i < buff.size(); i++)
buff[i] = table(index += step);
tx_stream->send(&buff.front(), buff.size(), md);
}
//send a mini EOB packet
md.end_of_burst = true;
tx_stream->send("", 0, md);
}
/***********************************************************************
* Transmit thread
**********************************************************************/
static void tx_thread(uhd::usrp::multi_usrp::sptr usrp, const double tx_wave_ampl)
{
uhd::set_thread_priority_safe();
//create a transmit streamer
uhd::stream_args_t stream_args("fc32"); //complex floats
uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);
//setup variables and allocate buffer
uhd::tx_metadata_t md;
md.has_time_spec = false;
std::vector<samp_type> buff(tx_stream->get_max_num_samps()*10);
//fill buff and send until interrupted
while (not boost::this_thread::interruption_requested())
{
for (size_t i = 0; i < buff.size(); i++)
buff[i] = float(tx_wave_ampl);
tx_stream->send(&buff.front(), buff.size(), md);
}
//send a mini EOB packet
md.end_of_burst = true;
tx_stream->send("", 0, md);
}
template<typename samp_type> void send_from_file(
uhd::usrp::multi_usrp::sptr usrp,
const std::string &cpu_format,
const std::string &wire_format,
const std::string &file,
size_t samps_per_buff
){
//create a transmit streamer
uhd::stream_args_t stream_args(cpu_format, wire_format);
uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);
uhd::tx_metadata_t md;
md.start_of_burst = false;
md.end_of_burst = false;
std::vector<samp_type> buff(samps_per_buff);
std::ifstream infile(file.c_str(), std::ifstream::binary);
//loop until the entire file has been read
while(not md.end_of_burst and not stop_signal_called){
infile.read((char*)&buff.front(), buff.size()*sizeof(samp_type));
size_t num_tx_samps = infile.gcount()/sizeof(samp_type);
md.end_of_burst = infile.eof();
tx_stream->send(&buff.front(), num_tx_samps, md);
}
infile.close();
}
uhd::tx_streamer::sptr
Responder::create_tx_streamer(uhd::usrp::multi_usrp::sptr usrp)
{
uhd::stream_args_t tx_stream_args("fc32"); //complex floats
if (_allow_late_bursts == false)
{
tx_stream_args.args["underflow_policy"] = "next_burst";
}
uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(tx_stream_args);
return tx_stream;
}
/***********************************************************************
* TX Hammer
**********************************************************************/
void tx_hammer(uhd::usrp::multi_usrp::sptr usrp, const std::string &tx_cpu, const std::string &tx_otw){
uhd::set_thread_priority_safe();
//create a transmit streamer
uhd::stream_args_t stream_args(tx_cpu, tx_otw);
for (size_t ch = 0; ch < usrp->get_num_mboards(); ch++) //linear channel mapping
stream_args.channels.push_back(ch);
uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);
uhd::tx_metadata_t md;
std::vector<std::complex<float> > buff(10000);
//print pre-test summary
std::cout << boost::format(
"Testing transmit rate %f Msps"
) % (usrp->get_tx_rate()/1e6) << std::endl;
//setup variables and allocate buffer
std::srand( time(NULL) );
while(not boost::this_thread::interruption_requested()){
size_t total_num_samps = rand() % 100000;
size_t num_acc_samps = 0;
float timeout = 1;
usrp->set_time_now(uhd::time_spec_t(0.0));
while(num_acc_samps < total_num_samps){
//send a single packet
num_tx_samps += tx_stream->send(&buff, tx_stream->get_max_num_samps(), md, timeout);
num_acc_samps += std::min(total_num_samps-num_acc_samps, tx_stream->get_max_num_samps());
}
//send a mini EOB packet
md.end_of_burst = true;
tx_stream->send("", 0, md);
}
}
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;
}