void load_fpga_image(const std::string &path)
{
if (not boost::filesystem::exists("/dev/xdevcfg"))
::system("mknod /dev/xdevcfg c 259 0");
UHD_MSG(status) << "Loading FPGA image: " << path << "..." << std::flush;
std::ifstream fpga_file(path.c_str(), std::ios_base::binary);
UHD_ASSERT_THROW(fpga_file.good());
std::FILE *wfile;
wfile = std::fopen("/dev/xdevcfg", "wb");
UHD_ASSERT_THROW(!(wfile == NULL));
char buff[16384]; // devcfg driver can't handle huge writes
do {
fpga_file.read(buff, sizeof(buff));
std::fwrite(buff, 1, size_t(fpga_file.gcount()), wfile);
} while (fpga_file);
fpga_file.close();
std::fclose(wfile);
UHD_MSG(status) << " done" << std::endl;
}
void send_char(const char ch)
{
managed_send_buffer::sptr buff = _xport->get_send_buff();
UHD_ASSERT_THROW(bool(buff));
vrt::if_packet_info_t packet_info;
packet_info.link_type = vrt::if_packet_info_t::LINK_TYPE_CHDR;
packet_info.packet_type = vrt::if_packet_info_t::PACKET_TYPE_CONTEXT;
packet_info.num_payload_words32 = 2;
packet_info.num_payload_bytes = packet_info.num_payload_words32*sizeof(uint32_t);
packet_info.packet_count = _count++;
packet_info.sob = false;
packet_info.eob = false;
packet_info.sid = _sid;
packet_info.has_sid = true;
packet_info.has_cid = false;
packet_info.has_tsi = false;
packet_info.has_tsf = false;
packet_info.has_tlr = false;
uint32_t *packet_buff = buff->cast<uint32_t *>();
vrt::if_hdr_pack_le(packet_buff, packet_info);
packet_buff[packet_info.num_header_words32+0] = uhd::htonx(uint32_t(_baud_div));
packet_buff[packet_info.num_header_words32+1] = uhd::htonx(uint32_t(ch));
buff->commit(packet_info.num_packet_words32*sizeof(uint32_t));
}
std::string get_ipv4_addr(unsigned int port_id)
{
struct in_addr ipv4_addr;
int status = uhd_dpdk_get_ipv4_addr(port_id, &ipv4_addr.s_addr, NULL);
UHD_ASSERT_THROW(status == 0);
char addr_str[INET_ADDRSTRLEN];
inet_ntop(AF_INET, &ipv4_addr, addr_str, sizeof(addr_str));
return std::string(addr_str);
}
void n230_eeprom_manager::_transact(const uint32_t command)
{
//Load request struct
_request.flags = uhd::htonx<uint32_t>(N230_FLASH_COMM_FLAGS_ACK | command);
_request.seq = uhd::htonx<uint32_t>(_seq_num++);
//Send request
_flush_xport();
_udp_xport->send(boost::asio::buffer(&_request, sizeof(_request)));
//Recv reply
const size_t nbytes = _udp_xport->recv(boost::asio::buffer(&_response, sizeof(_response)), UDP_TIMEOUT_IN_SEC);
if (nbytes == 0) throw uhd::io_error("n230_eeprom_manager::_transact failure");
//Sanity checks
const size_t flags = uhd::ntohx<uint32_t>(_response.flags);
UHD_ASSERT_THROW(nbytes == sizeof(_response));
UHD_ASSERT_THROW(_response.seq == _request.seq);
UHD_ASSERT_THROW(flags & command);
}
void get_freq_and_freq_word(
const double requested_freq,
const double tick_rate,
double &actual_freq,
int32_t &freq_word
) {
//correct for outside of rate (wrap around)
double freq = std::fmod(requested_freq, tick_rate);
if (std::abs(freq) > tick_rate/2.0)
freq -= boost::math::sign(freq) * tick_rate;
//confirm that the target frequency is within range of the CORDIC
UHD_ASSERT_THROW(std::abs(freq) <= tick_rate/2.0);
/* Now calculate the frequency word. It is possible for this calculation
* to cause an overflow. As the requested DSP frequency approaches the
* master clock rate, that ratio multiplied by the scaling factor (2^32)
* will generally overflow within the last few kHz of tunable range.
* Thus, we check to see if the operation will overflow before doing it,
* and if it will, we set it to the integer min or max of this system.
*/
freq_word = 0;
static const double scale_factor = std::pow(2.0, 32);
if ((freq / tick_rate) >= (MAX_FREQ_WORD / scale_factor)) {
/* Operation would have caused a positive overflow of int32. */
freq_word = MAX_FREQ_WORD;
} else if ((freq / tick_rate) <= (MIN_FREQ_WORD / scale_factor)) {
/* Operation would have caused a negative overflow of int32. */
freq_word = MIN_FREQ_WORD;
} else {
/* The operation is safe. Perform normally. */
freq_word = int32_t(boost::math::round((freq / tick_rate) * scale_factor));
}
actual_freq = (double(freq_word) / scale_factor) * tick_rate;
}
/***********************************************************************
* recv_to_file function
**********************************************************************/
template<typename samp_type> void recv_to_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,
int num_requested_samples,
double settling_time,
std::vector<size_t> rx_channel_nums
){
int num_total_samps = 0;
//create a receive streamer
uhd::stream_args_t stream_args(cpu_format,wire_format);
stream_args.channels = rx_channel_nums;
uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);
// Prepare buffers for received samples and metadata
uhd::rx_metadata_t md;
std::vector <std::vector< samp_type > > buffs(
rx_channel_nums.size(), std::vector< samp_type >(samps_per_buff)
);
//create a vector of pointers to point to each of the channel buffers
std::vector<samp_type *> buff_ptrs;
for (size_t i = 0; i < buffs.size(); i++) {
buff_ptrs.push_back(&buffs[i].front());
}
// Create one ofstream object per channel
// (use shared_ptr because ofstream is non-copyable)
std::vector<boost::shared_ptr<std::ofstream> > outfiles;
for (size_t i = 0; i < buffs.size(); i++) {
const std::string this_filename = generate_out_filename(file, buffs.size(), i);
outfiles.push_back(boost::shared_ptr<std::ofstream>(new std::ofstream(this_filename.c_str(), std::ofstream::binary)));
}
UHD_ASSERT_THROW(outfiles.size() == buffs.size());
UHD_ASSERT_THROW(buffs.size() == rx_channel_nums.size());
bool overflow_message = true;
double timeout = settling_time + 0.1f; //expected settling time + padding for first recv
//setup streaming
uhd::stream_cmd_t stream_cmd((num_requested_samples == 0)?
uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS:
uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE
);
stream_cmd.num_samps = num_requested_samples;
stream_cmd.stream_now = false;
stream_cmd.time_spec = uhd::time_spec_t(settling_time);
rx_stream->issue_stream_cmd(stream_cmd);
while(not stop_signal_called and (num_requested_samples > num_total_samps or num_requested_samples == 0)){
size_t num_rx_samps = rx_stream->recv(buff_ptrs, samps_per_buff, md, timeout);
timeout = 0.1f; //small timeout for subsequent recv
if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_TIMEOUT) {
std::cout << boost::format("Timeout while streaming") << std::endl;
break;
}
if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_OVERFLOW){
if (overflow_message){
overflow_message = false;
std::cerr << boost::format(
"Got an overflow indication. Please consider the following:\n"
" Your write medium must sustain a rate of %fMB/s.\n"
" Dropped samples will not be written to the file.\n"
" Please modify this example for your purposes.\n"
" This message will not appear again.\n"
) % (usrp->get_rx_rate()*sizeof(samp_type)/1e6);
}
continue;
}
if (md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE){
throw std::runtime_error(str(boost::format(
"Receiver error %s"
) % md.strerror()));
}
num_total_samps += num_rx_samps;
for (size_t i = 0; i < outfiles.size(); i++) {
outfiles[i]->write((const char*) buff_ptrs[i], num_rx_samps*sizeof(samp_type));
}
}
// Shut down receiver
stream_cmd.stream_mode = uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS;
rx_stream->issue_stream_cmd(stream_cmd);
// Close files
for (size_t i = 0; i < outfiles.size(); i++) {
outfiles[i]->close();
}
}
/***********************************************************************
* Main function
**********************************************************************/
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//transmit variables to be set by po
std::string tx_args, wave_type, tx_ant, tx_subdev, ref, otw, tx_channels;
double tx_rate, tx_freq, tx_gain, wave_freq, tx_bw;
float ampl;
//receive variables to be set by po
std::string rx_args, file, type, rx_ant, rx_subdev, rx_channels;
size_t total_num_samps, spb;
double rx_rate, rx_freq, rx_gain, rx_bw;
double settling;
//setup the program options
po::options_description desc("Allowed options");
desc.add_options()
("help", "help message")
("tx-args", po::value<std::string>(&tx_args)->default_value(""), "uhd transmit device address args")
("rx-args", po::value<std::string>(&rx_args)->default_value(""), "uhd receive device address args")
("file", po::value<std::string>(&file)->default_value("usrp_samples.dat"), "name of the file to write binary samples to")
("type", po::value<std::string>(&type)->default_value("short"), "sample type in file: double, float, or short")
("nsamps", po::value<size_t>(&total_num_samps)->default_value(0), "total number of samples to receive")
("settling", po::value<double>(&settling)->default_value(double(0.2)), "settling time (seconds) before receiving")
("spb", po::value<size_t>(&spb)->default_value(0), "samples per buffer, 0 for default")
("tx-rate", po::value<double>(&tx_rate), "rate of transmit outgoing samples")
("rx-rate", po::value<double>(&rx_rate), "rate of receive incoming samples")
("tx-freq", po::value<double>(&tx_freq), "transmit RF center frequency in Hz")
("rx-freq", po::value<double>(&rx_freq), "receive RF center frequency in Hz")
("ampl", po::value<float>(&l)->default_value(float(0.3)), "amplitude of the waveform [0 to 0.7]")
("tx-gain", po::value<double>(&tx_gain), "gain for the transmit RF chain")
("rx-gain", po::value<double>(&rx_gain), "gain for the receive RF chain")
("tx-ant", po::value<std::string>(&tx_ant), "transmit antenna selection")
("rx-ant", po::value<std::string>(&rx_ant), "receive antenna selection")
("tx-subdev", po::value<std::string>(&tx_subdev), "transmit subdevice specification")
("rx-subdev", po::value<std::string>(&rx_subdev), "receive subdevice specification")
("tx-bw", po::value<double>(&tx_bw), "analog transmit filter bandwidth in Hz")
("rx-bw", po::value<double>(&rx_bw), "analog receive filter bandwidth in Hz")
("wave-type", po::value<std::string>(&wave_type)->default_value("CONST"), "waveform type (CONST, SQUARE, RAMP, SINE)")
("wave-freq", po::value<double>(&wave_freq)->default_value(0), "waveform frequency in Hz")
("ref", po::value<std::string>(&ref)->default_value("internal"), "clock reference (internal, external, mimo)")
("otw", po::value<std::string>(&otw)->default_value("sc16"), "specify the over-the-wire sample mode")
("tx-channels", po::value<std::string>(&tx_channels)->default_value("0"), "which TX channel(s) to use (specify \"0\", \"1\", \"0,1\", etc)")
("rx-channels", po::value<std::string>(&rx_channels)->default_value("0"), "which RX channel(s) to use (specify \"0\", \"1\", \"0,1\", etc)")
("tx-int-n", "tune USRP TX with integer-N tuning")
("rx-int-n", "tune USRP RX with integer-N tuning")
;
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 TXRX Loopback to File %s") % desc << std::endl;
return ~0;
}
//create a usrp device
std::cout << std::endl;
std::cout << boost::format("Creating the transmit usrp device with: %s...") % tx_args << std::endl;
uhd::usrp::multi_usrp::sptr tx_usrp = uhd::usrp::multi_usrp::make(tx_args);
std::cout << std::endl;
std::cout << boost::format("Creating the receive usrp device with: %s...") % rx_args << std::endl;
uhd::usrp::multi_usrp::sptr rx_usrp = uhd::usrp::multi_usrp::make(rx_args);
//always select the subdevice first, the channel mapping affects the other settings
if (vm.count("tx-subdev")) tx_usrp->set_tx_subdev_spec(tx_subdev);
if (vm.count("rx-subdev")) rx_usrp->set_rx_subdev_spec(rx_subdev);
//detect which channels to use
std::vector<std::string> tx_channel_strings;
std::vector<size_t> tx_channel_nums;
boost::split(tx_channel_strings, tx_channels, boost::is_any_of("\"',"));
for(size_t ch = 0; ch < tx_channel_strings.size(); ch++){
size_t chan = std::stoi(tx_channel_strings[ch]);
if(chan >= tx_usrp->get_tx_num_channels()){
throw std::runtime_error("Invalid TX channel(s) specified.");
}
else tx_channel_nums.push_back(std::stoi(tx_channel_strings[ch]));
}
std::vector<std::string> rx_channel_strings;
std::vector<size_t> rx_channel_nums;
boost::split(rx_channel_strings, rx_channels, boost::is_any_of("\"',"));
for(size_t ch = 0; ch < rx_channel_strings.size(); ch++){
size_t chan = std::stoi(rx_channel_strings[ch]);
if(chan >= rx_usrp->get_rx_num_channels()){
throw std::runtime_error("Invalid RX channel(s) specified.");
}
else rx_channel_nums.push_back(std::stoi(rx_channel_strings[ch]));
}
//Lock mboard clocks
tx_usrp->set_clock_source(ref);
rx_usrp->set_clock_source(ref);
std::cout << boost::format("Using TX Device: %s") % tx_usrp->get_pp_string() << std::endl;
std::cout << boost::format("Using RX Device: %s") % rx_usrp->get_pp_string() << std::endl;
//set the transmit sample rate
if (not vm.count("tx-rate")){
std::cerr << "Please specify the transmit sample rate with --tx-rate" << std::endl;
return ~0;
}
std::cout << boost::format("Setting TX Rate: %f Msps...") % (tx_rate/1e6) << std::endl;
tx_usrp->set_tx_rate(tx_rate);
std::cout << boost::format("Actual TX Rate: %f Msps...") % (tx_usrp->get_tx_rate()/1e6) << std::endl << std::endl;
//set the receive sample rate
if (not vm.count("rx-rate")){
std::cerr << "Please specify the sample rate with --rx-rate" << std::endl;
return ~0;
}
std::cout << boost::format("Setting RX Rate: %f Msps...") % (rx_rate/1e6) << std::endl;
rx_usrp->set_rx_rate(rx_rate);
std::cout << boost::format("Actual RX Rate: %f Msps...") % (rx_usrp->get_rx_rate()/1e6) << std::endl << std::endl;
//set the transmit center frequency
if (not vm.count("tx-freq")){
std::cerr << "Please specify the transmit center frequency with --tx-freq" << std::endl;
return ~0;
}
for(size_t ch = 0; ch < tx_channel_nums.size(); ch++) {
size_t channel = tx_channel_nums[ch];
if (tx_channel_nums.size() > 1) {
std::cout << "Configuring TX Channel " << channel << std::endl;
}
std::cout << boost::format("Setting TX Freq: %f MHz...") % (tx_freq/1e6) << std::endl;
uhd::tune_request_t tx_tune_request(tx_freq);
if(vm.count("tx-int-n")) tx_tune_request.args = uhd::device_addr_t("mode_n=integer");
tx_usrp->set_tx_freq(tx_tune_request, channel);
std::cout << boost::format("Actual TX Freq: %f MHz...") % (tx_usrp->get_tx_freq(channel)/1e6) << std::endl << std::endl;
//set the rf gain
if (vm.count("tx-gain")){
std::cout << boost::format("Setting TX Gain: %f dB...") % tx_gain << std::endl;
tx_usrp->set_tx_gain(tx_gain, channel);
std::cout << boost::format("Actual TX Gain: %f dB...") % tx_usrp->get_tx_gain(channel) << std::endl << std::endl;
}
//set the analog frontend filter bandwidth
if (vm.count("tx-bw")){
std::cout << boost::format("Setting TX Bandwidth: %f MHz...") % tx_bw << std::endl;
tx_usrp->set_tx_bandwidth(tx_bw, channel);
std::cout << boost::format("Actual TX Bandwidth: %f MHz...") % tx_usrp->get_tx_bandwidth(channel) << std::endl << std::endl;
}
//set the antenna
if (vm.count("tx-ant")) tx_usrp->set_tx_antenna(tx_ant, channel);
}
for(size_t ch = 0; ch < rx_channel_nums.size(); ch++) {
size_t channel = rx_channel_nums[ch];
if (rx_channel_nums.size() > 1) {
std::cout << "Configuring RX Channel " << channel << std::endl;
}
//set the receive center frequency
if (not vm.count("rx-freq")){
std::cerr << "Please specify the center frequency with --rx-freq" << std::endl;
return ~0;
}
std::cout << boost::format("Setting RX Freq: %f MHz...") % (rx_freq/1e6) << std::endl;
uhd::tune_request_t rx_tune_request(rx_freq);
if(vm.count("rx-int-n")) rx_tune_request.args = uhd::device_addr_t("mode_n=integer");
rx_usrp->set_rx_freq(rx_tune_request, channel);
std::cout << boost::format("Actual RX Freq: %f MHz...") % (rx_usrp->get_rx_freq(channel)/1e6) << std::endl << std::endl;
//set the receive rf gain
if (vm.count("rx-gain")){
std::cout << boost::format("Setting RX Gain: %f dB...") % rx_gain << std::endl;
rx_usrp->set_rx_gain(rx_gain, channel);
std::cout << boost::format("Actual RX Gain: %f dB...") % rx_usrp->get_rx_gain(channel) << std::endl << std::endl;
}
//set the receive analog frontend filter bandwidth
if (vm.count("rx-bw")){
std::cout << boost::format("Setting RX Bandwidth: %f MHz...") % (rx_bw/1e6) << std::endl;
rx_usrp->set_rx_bandwidth(rx_bw, channel);
std::cout << boost::format("Actual RX Bandwidth: %f MHz...") % (rx_usrp->get_rx_bandwidth(channel)/1e6) << std::endl << std::endl;
}
}
//set the receive antenna
if (vm.count("ant")) rx_usrp->set_rx_antenna(rx_ant);
//for the const wave, set the wave freq for small samples per period
if (wave_freq == 0 and wave_type == "CONST"){
wave_freq = tx_usrp->get_tx_rate()/2;
}
//error when the waveform is not possible to generate
if (std::abs(wave_freq) > tx_usrp->get_tx_rate()/2){
throw std::runtime_error("wave freq out of Nyquist zone");
}
if (tx_usrp->get_tx_rate()/std::abs(wave_freq) > wave_table_len/2){
throw std::runtime_error("wave freq too small for table");
}
//pre-compute the waveform values
const wave_table_class wave_table(wave_type, ampl);
const size_t step = boost::math::iround(wave_freq/tx_usrp->get_tx_rate() * wave_table_len);
size_t index = 0;
//create a transmit streamer
//linearly map channels (index0 = channel0, index1 = channel1, ...)
uhd::stream_args_t stream_args("fc32", otw);
stream_args.channels = tx_channel_nums;
uhd::tx_streamer::sptr tx_stream = tx_usrp->get_tx_stream(stream_args);
//allocate a buffer which we re-use for each channel
if (spb == 0) spb = tx_stream->get_max_num_samps()*10;
std::vector<std::complex<float> > buff(spb);
int num_channels = tx_channel_nums.size();
//setup the metadata flags
uhd::tx_metadata_t md;
md.start_of_burst = true;
md.end_of_burst = false;
md.has_time_spec = true;
md.time_spec = uhd::time_spec_t(0.5); //give us 0.5 seconds to fill the tx buffers
//Check Ref and LO Lock detect
std::vector<std::string> tx_sensor_names, rx_sensor_names;
tx_sensor_names = tx_usrp->get_tx_sensor_names(0);
if (std::find(tx_sensor_names.begin(), tx_sensor_names.end(), "lo_locked") != tx_sensor_names.end()) {
uhd::sensor_value_t lo_locked = tx_usrp->get_tx_sensor("lo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
rx_sensor_names = rx_usrp->get_rx_sensor_names(0);
if (std::find(rx_sensor_names.begin(), rx_sensor_names.end(), "lo_locked") != rx_sensor_names.end()) {
uhd::sensor_value_t lo_locked = rx_usrp->get_rx_sensor("lo_locked",0);
std::cout << boost::format("Checking RX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
tx_sensor_names = tx_usrp->get_mboard_sensor_names(0);
if ((ref == "mimo") and (std::find(tx_sensor_names.begin(), tx_sensor_names.end(), "mimo_locked") != tx_sensor_names.end())) {
uhd::sensor_value_t mimo_locked = tx_usrp->get_mboard_sensor("mimo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % mimo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(mimo_locked.to_bool());
}
if ((ref == "external") and (std::find(tx_sensor_names.begin(), tx_sensor_names.end(), "ref_locked") != tx_sensor_names.end())) {
uhd::sensor_value_t ref_locked = tx_usrp->get_mboard_sensor("ref_locked",0);
std::cout << boost::format("Checking TX: %s ...") % ref_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(ref_locked.to_bool());
}
rx_sensor_names = rx_usrp->get_mboard_sensor_names(0);
if ((ref == "mimo") and (std::find(rx_sensor_names.begin(), rx_sensor_names.end(), "mimo_locked") != rx_sensor_names.end())) {
uhd::sensor_value_t mimo_locked = rx_usrp->get_mboard_sensor("mimo_locked",0);
std::cout << boost::format("Checking RX: %s ...") % mimo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(mimo_locked.to_bool());
}
if ((ref == "external") and (std::find(rx_sensor_names.begin(), rx_sensor_names.end(), "ref_locked") != rx_sensor_names.end())) {
uhd::sensor_value_t ref_locked = rx_usrp->get_mboard_sensor("ref_locked",0);
std::cout << boost::format("Checking RX: %s ...") % ref_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(ref_locked.to_bool());
}
if (total_num_samps == 0){
std::signal(SIGINT, &sig_int_handler);
std::cout << "Press Ctrl + C to stop streaming..." << std::endl;
}
//reset usrp time to prepare for transmit/receive
std::cout << boost::format("Setting device timestamp to 0...") << std::endl;
tx_usrp->set_time_now(uhd::time_spec_t(0.0));
//start transmit worker thread
boost::thread_group transmit_thread;
transmit_thread.create_thread(boost::bind(&transmit_worker, buff, wave_table, tx_stream, md, step, index, num_channels));
//recv to file
if (type == "double") recv_to_file<std::complex<double> >(rx_usrp, "fc64", otw, file, spb, total_num_samps, settling, rx_channel_nums);
else if (type == "float") recv_to_file<std::complex<float> >(rx_usrp, "fc32", otw, file, spb, total_num_samps, settling, rx_channel_nums);
else if (type == "short") recv_to_file<std::complex<short> >(rx_usrp, "sc16", otw, file, spb, total_num_samps, settling, rx_channel_nums);
else {
//clean up transmit worker
stop_signal_called = true;
transmit_thread.join_all();
throw std::runtime_error("Unknown type " + type);
}
//clean up transmit worker
stop_signal_called = true;
transmit_thread.join_all();
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return EXIT_SUCCESS;
}
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
std::string args, tx_file, rx_file, type, ref, wire_format, cpu_format;
double rate, freq, tx_gain, rx_gain, rx_bw, delay, lo_off,seconds_in_future, rx_timeout;
rx_bw = RX_BW;
rx_gain = RX_GAIN;
wire_format = WIRE_FORMAT;
cpu_format = CPU_FORMAT;
rate = SAMP_RATE;
args = ARGS;
ref = REF_CLOCK;
freq = CENT_FREQ;
tx_gain = TX_GAIN;
// samples_per_buff = SAMPLES_PER_BUFFER;
tx_file = TX_FILENAME;
rx_file = RX_FILENAME;
seconds_in_future = SYNCH_DELAY;
rx_timeout = RX_TIMEOUT;
//------------------INIT TX------------------
//Set the scheduling priority on the current thread. Same as set_thread_priority but does not throw on failure.
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); //Make the usrp by calling the constructor with param the args
usrp->set_clock_source(ref); //Set the clock source for the usrp device. This sets the source for a 10 MHz reference clock. Typical options for source: internal, external, MIMO.
std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_tx_rate(rate); //Set the sample rate
std::cout << boost::format("Actual TX Rate: %f Msps...") % (usrp->get_tx_rate()/1e6) << std::endl << std::endl;
std::cout << boost::format("Setting TX Freq: %f MHz...") % (freq/1e6) << std::endl; //Set up tuning frequency
uhd::tune_request_t tune_request;
tune_request = uhd::tune_request_t(freq); //Generate the tune request
usrp->set_tx_freq(tune_request); //Tune to CENT_FREQ
std::cout << boost::format("Actual TX Freq: %f MHz...") % (usrp->get_tx_freq()/1e6) << std::endl << std::endl; //PRINT Actual CENT_FREQ
std::cout << boost::format("Setting TX Gain: %f dB...") % tx_gain << std::endl;
usrp->set_tx_gain(tx_gain); //Set the tx_gain
std::cout << boost::format("Actual TX Gain: %f dB...") % usrp->get_tx_gain() << std::endl << std::endl;
//------------------CHECK STUFF------------------
//Check Ref and LO Lock detect
std::vector<std::string> sensor_names;
sensor_names = usrp->get_tx_sensor_names(0);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked") != sensor_names.end()) {
uhd::sensor_value_t lo_locked = usrp->get_tx_sensor("lo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
//------------------INIT RX------------------
//IS THIS NECESSARY?
//always select the subdevice first, the channel mapping affects the other settings
//usrp->set_rx_subdev_spec(subdev);
std::cout << boost::format("Setting RX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_rx_rate(rate);
std::cout << boost::format("Actual RX Rate: %f Msps...") % (usrp->get_rx_rate()/1e6) << std::endl << std::endl;
//set the center frequency
std::cout << boost::format("Setting RX Freq: %f MHz...") % (freq/1e6) << std::endl;
usrp->set_rx_freq(tune_request);
std::cout << boost::format("Actual RX Freq: %f MHz...") % (usrp->get_rx_freq()/1e6) << std::endl << std::endl;
std::cout << boost::format("Setting RX Gain: %f dB...") % rx_gain << std::endl;
usrp->set_rx_gain(rx_gain);
std::cout << boost::format("Actual RX Gain: %f dB...") % usrp->get_rx_gain() << std::endl << std::endl;
boost::this_thread::sleep(boost::posix_time::seconds(1)); //allow 1sec setup time
//------------------CHECK STUFF------------------
//Always check for locked sensor
check_locked_sensor(usrp->get_rx_sensor_names(0), "lo_locked", boost::bind(&uhd::usrp::multi_usrp::get_rx_sensor, usrp, _1, 0), 1);
//------------------INIT FILES---------------
std::ofstream outfile;
outfile.open(rx_file.c_str(), std::ofstream::binary);
if(!outfile.good()){
std::cout << "OUT File error\n";
return 0;
}
std::ifstream infile(tx_file.c_str(), std::ifstream::binary);
if(!infile.good()){
std::cout << "IN File error\n";
return 0;
}
//------------------INIT STREAMS---------------
//Stream ARGS
uhd::stream_args_t stream_args(cpu_format, wire_format); //Call the constructor of the class stream_args_t and generate the stream_args object with inputs the cpu_format and wire_format (this is the format per sample)
tx_stream = usrp->get_tx_stream(stream_args); //Generate a tx_streamer object named tx_stream using the usrp->get_tx_stream(stream_args). Remember, usrp is already initialized
uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args); //Generate a tx_streamer object named tx_stream using the usrp->get_tx_stream(stream_args). Remember, usrp is already initialized
//Setup metadata
//Setup tx_metadata
tx_md.start_of_burst = true; //Set start of burst to true for the first packet in the chain. ?
tx_md.end_of_burst = false;
#define SYNCHED_TXRX 1
//For TX
if(SYNCHED_TXRX){
tx_md.has_time_spec = true;
}else{
tx_md.has_time_spec = false;
}
//Setup rx_metadata
uhd::rx_metadata_t rx_md;
//Setup stream command ONLY FOR RX
uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
stream_cmd.num_samps = samples_per_buff;
//For RX
if(SYNCHED_TXRX){
stream_cmd.stream_now = false;
// tx_md.time_spec = stream_cmd.time_spec;
}else{
stream_cmd.stream_now = true;
stream_cmd.time_spec = uhd::time_spec_t();
}
if(SYNCHED_TXRX){
//Cannt get any faster than this
tx_md.time_spec = stream_cmd.time_spec = uhd::time_spec_t(seconds_in_future)+usrp->get_time_now();
}
//Create the buffs
std::vector<std::complex<float> > small_rx_buff(samples_per_buff);
//Fill the TX buffer
for (int i = 0; i < samples_per_buff; ++i){
infile.read((char*)&small_tx_buff.at(i), small_tx_buff.size()*sizeof(std::complex<float>));
}
infile.close(); //Close the file pointer
//Issue the stream command
rx_stream->issue_stream_cmd(stream_cmd);
//Print number of maximum buffer size
printf("MAX TX: %d\n", (int)tx_stream->get_max_num_samps());
printf("MAX RX %d\n", (int)rx_stream->get_max_num_samps());
size_t num_rx_samps = 0;
boost::thread txThread(thread_startTx);
//receivotrnsmit
txThread.join(); //Strart the thread for tx (tx is f blocking)
num_rx_samps = rx_stream->recv(&small_rx_buff.front(), small_rx_buff.size(), rx_md, rx_timeout, false); // Receive buffers containing samples described by the metadata.
// num_rx_samps = rx_stream->recv(&small_rx_buff.front(), small_rx_buff.size(), rx_md, rx_timeout, false); // Receive buffers containing samples described by the metadata.
//Wait for everything to stop
boost::this_thread::sleep(boost::posix_time::milliseconds(2000));
//Cleanup and print what happened
usrp->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS); // Stop the stream (not really necessary here)
double rx_stamp = rx_md.time_spec.get_full_secs() + rx_md.time_spec.get_frac_secs();
double tx_stamp = tx_md.time_spec.get_full_secs() + tx_md.time_spec.get_frac_secs();
double t_diff = rx_stamp - tx_stamp;
printf("RX Time stamp: %.12lf\n ΤX Time stamp: %.12lf\n Diff: %.12lf\n",rx_stamp, tx_stamp, t_diff);
switch ( rx_md.error_code ) {
case uhd::rx_metadata_t::ERROR_CODE_NONE:
printf("No error:)\n");
break;
case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
printf("MDError 2\n");
break;
case uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND:
printf("MDError 3\n");
break;
case uhd::rx_metadata_t::ERROR_CODE_BROKEN_CHAIN:
printf("MDError 4\n");
break;
case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
printf("MDError 5\n");
break;
case uhd::rx_metadata_t::ERROR_CODE_ALIGNMENT:
printf("MDError 6\n");
break;
case uhd::rx_metadata_t::ERROR_CODE_BAD_PACKET:
printf("MDError 7\n");
break;
default:
printf("WUT\n");
break;
}
//write the samples
if (outfile.is_open()){
outfile.write((const char*)&small_rx_buff.front(), num_rx_samps*sizeof(std::complex<float>));
}
outfile.close(); //Close the file pointer
//print
std::cout << "Transmitted samples: " << num_tx_samps << '\n';
std::cout << "Received samples: " << num_rx_samps << '\n';
return EXIT_SUCCESS;
}
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string args, file, type, ant, subdev, ref, wirefmt;
size_t spb;
double rate, freq, gain, bw, delay, lo_off;
//setup the program options
po::options_description desc("Allowed options");
desc.add_options()
("help", "help message")
("args", po::value<std::string>(&args)->default_value(""), "multi uhd device address args")
("file", po::value<std::string>(&file)->default_value("usrp_samples.dat"), "name of the file to read binary samples from")
("type", po::value<std::string>(&type)->default_value("short"), "sample type: double, float, or short")
("spb", po::value<size_t>(&spb)->default_value(10000), "samples per buffer")
("rate", po::value<double>(&rate), "rate of outgoing samples")
("freq", po::value<double>(&freq), "RF center frequency in Hz")
("lo_off", po::value<double>(&lo_off), "Offset for frontend LO in Hz (optional)")
("gain", po::value<double>(&gain), "gain for the RF chain")
("ant", po::value<std::string>(&ant), "daughterboard antenna selection")
("subdev", po::value<std::string>(&subdev), "daughterboard subdevice specification")
("bw", po::value<double>(&bw), "daughterboard IF filter bandwidth in Hz")
("ref", po::value<std::string>(&ref)->default_value("internal"), "waveform type (internal, external, mimo)")
("wirefmt", po::value<std::string>(&wirefmt)->default_value("sc16"), "wire format (sc8 or sc16)")
("delay", po::value<double>(&delay)->default_value(0.0), "specify a delay between repeated transmission of file")
("repeat", "repeatedly transmit file")
("int-n", "tune USRP with integer-n tuning")
;
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 TX samples from file %s") % desc << std::endl;
return ~0;
}
bool repeat = vm.count("repeat");
//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);
//Lock mboard clocks
usrp->set_clock_source(ref);
//always select the subdevice first, the channel mapping affects the other settings
if (vm.count("subdev")) usrp->set_tx_subdev_spec(subdev);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//set the sample rate
if (not vm.count("rate")){
std::cerr << "Please specify the sample rate with --rate" << std::endl;
return ~0;
}
std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_tx_rate(rate);
std::cout << boost::format("Actual TX Rate: %f Msps...") % (usrp->get_tx_rate()/1e6) << std::endl << std::endl;
//set the center frequency
if (not vm.count("freq")){
std::cerr << "Please specify the center frequency with --freq" << std::endl;
return ~0;
}
std::cout << boost::format("Setting TX Freq: %f MHz...") % (freq/1e6) << std::endl;
uhd::tune_request_t tune_request;
if(vm.count("lo_off")) tune_request = uhd::tune_request_t(freq, lo_off);
else tune_request = uhd::tune_request_t(freq);
if(vm.count("int-n")) tune_request.args = uhd::device_addr_t("mode_n=integer");
usrp->set_tx_freq(tune_request);
std::cout << boost::format("Actual TX Freq: %f MHz...") % (usrp->get_tx_freq()/1e6) << std::endl << std::endl;
//set the rf gain
if (vm.count("gain")){
std::cout << boost::format("Setting TX Gain: %f dB...") % gain << std::endl;
usrp->set_tx_gain(gain);
std::cout << boost::format("Actual TX Gain: %f dB...") % usrp->get_tx_gain() << std::endl << std::endl;
}
//set the IF filter bandwidth
if (vm.count("bw")){
std::cout << boost::format("Setting TX Bandwidth: %f MHz...") % bw << std::endl;
usrp->set_tx_bandwidth(bw);
std::cout << boost::format("Actual TX Bandwidth: %f MHz...") % usrp->get_tx_bandwidth() << std::endl << std::endl;
}
//set the antenna
if (vm.count("ant")) usrp->set_tx_antenna(ant);
boost::this_thread::sleep(boost::posix_time::seconds(1)); //allow for some setup time
//Check Ref and LO Lock detect
std::vector<std::string> sensor_names;
sensor_names = usrp->get_tx_sensor_names(0);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked") != sensor_names.end()) {
uhd::sensor_value_t lo_locked = usrp->get_tx_sensor("lo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
sensor_names = usrp->get_mboard_sensor_names(0);
if ((ref == "mimo") and (std::find(sensor_names.begin(), sensor_names.end(), "mimo_locked") != sensor_names.end())) {
uhd::sensor_value_t mimo_locked = usrp->get_mboard_sensor("mimo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % mimo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(mimo_locked.to_bool());
}
if ((ref == "external") and (std::find(sensor_names.begin(), sensor_names.end(), "ref_locked") != sensor_names.end())) {
uhd::sensor_value_t ref_locked = usrp->get_mboard_sensor("ref_locked",0);
std::cout << boost::format("Checking TX: %s ...") % ref_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(ref_locked.to_bool());
}
//set sigint if user wants to receive
if(repeat){
std::signal(SIGINT, &sig_int_handler);
std::cout << "Press Ctrl + C to stop streaming..." << std::endl;
}
//send from file
do{
if (type == "double") send_from_file<std::complex<double> >(usrp, "fc64", wirefmt, file, spb);
else if (type == "float") send_from_file<std::complex<float> >(usrp, "fc32", wirefmt, file, spb);
else if (type == "short") send_from_file<std::complex<short> >(usrp, "sc16", wirefmt, file, spb);
else throw std::runtime_error("Unknown type " + type);
if(repeat and delay != 0.0) boost::this_thread::sleep(boost::posix_time::milliseconds(delay));
} while(repeat and not stop_signal_called);
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return EXIT_SUCCESS;
}
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string args, ant, subdev, ref;
size_t num_bins;
double rate, freq, gain, bw, frame_rate;
float ref_lvl, dyn_rng;
//setup the program options
po::options_description desc("Allowed options");
desc.add_options()
("help", "help message")
("args", po::value<std::string>(&args)->default_value(""), "multi uhd device address args")
// hardware parameters
("rate", po::value<double>(&rate), "rate of incoming samples (sps)")
("freq", po::value<double>(&freq), "RF center frequency in Hz")
("gain", po::value<double>(&gain), "gain for the RF chain")
("ant", po::value<std::string>(&ant), "daughterboard antenna selection")
("subdev", po::value<std::string>(&subdev), "daughterboard subdevice specification")
("bw", po::value<double>(&bw), "daughterboard IF filter bandwidth in Hz")
// display parameters
("num-bins", po::value<size_t>(&num_bins)->default_value(512), "the number of bins in the DFT")
("frame-rate", po::value<double>(&frame_rate)->default_value(5), "frame rate of the display (fps)")
("ref-lvl", po::value<float>(&ref_lvl)->default_value(0), "reference level for the display (dB)")
("dyn-rng", po::value<float>(&dyn_rng)->default_value(60), "dynamic range for the display (dB)")
("ref", po::value<std::string>(&ref)->default_value("internal"), "waveform type (internal, external, mimo)")
("int-n", "tune USRP with integer-N tuning")
;
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") or not vm.count("rate")){
std::cout << boost::format("UHD RX ASCII Art DFT %s") % desc << std::endl;
return EXIT_FAILURE;
}
//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);
//Lock mboard clocks
usrp->set_clock_source(ref);
//always select the subdevice first, the channel mapping affects the other settings
if (vm.count("subdev")) usrp->set_rx_subdev_spec(subdev);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//set the sample rate
if (not vm.count("rate")){
std::cerr << "Please specify the sample rate with --rate" << std::endl;
return EXIT_FAILURE;
}
std::cout << boost::format("Setting RX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_rx_rate(rate);
std::cout << boost::format("Actual RX Rate: %f Msps...") % (usrp->get_rx_rate()/1e6) << std::endl << std::endl;
//set the center frequency
if (not vm.count("freq")){
std::cerr << "Please specify the center frequency with --freq" << std::endl;
return EXIT_FAILURE;
}
std::cout << boost::format("Setting RX Freq: %f MHz...") % (freq/1e6) << std::endl;
uhd::tune_request_t tune_request(freq);
if(vm.count("int-n")) tune_request.args = uhd::device_addr_t("mode_n=integer");
usrp->set_rx_freq(tune_request);
std::cout << boost::format("Actual RX Freq: %f MHz...") % (usrp->get_rx_freq()/1e6) << std::endl << std::endl;
//set the rf gain
if (vm.count("gain")){
std::cout << boost::format("Setting RX Gain: %f dB...") % gain << std::endl;
usrp->set_rx_gain(gain);
std::cout << boost::format("Actual RX Gain: %f dB...") % usrp->get_rx_gain() << std::endl << std::endl;
}
//set the IF filter bandwidth
if (vm.count("bw")){
std::cout << boost::format("Setting RX Bandwidth: %f MHz...") % bw << std::endl;
usrp->set_rx_bandwidth(bw);
std::cout << boost::format("Actual RX Bandwidth: %f MHz...") % usrp->get_rx_bandwidth() << std::endl << std::endl;
}
//set the antenna
if (vm.count("ant")) usrp->set_rx_antenna(ant);
boost::this_thread::sleep(boost::posix_time::seconds(1)); //allow for some setup time
//Check Ref and LO Lock detect
std::vector<std::string> sensor_names;
sensor_names = usrp->get_rx_sensor_names(0);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked") != sensor_names.end()) {
uhd::sensor_value_t lo_locked = usrp->get_rx_sensor("lo_locked",0);
std::cout << boost::format("Checking RX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
sensor_names = usrp->get_mboard_sensor_names(0);
if ((ref == "mimo") and (std::find(sensor_names.begin(), sensor_names.end(), "mimo_locked") != sensor_names.end())) {
uhd::sensor_value_t mimo_locked = usrp->get_mboard_sensor("mimo_locked",0);
std::cout << boost::format("Checking RX: %s ...") % mimo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(mimo_locked.to_bool());
}
if ((ref == "external") and (std::find(sensor_names.begin(), sensor_names.end(), "ref_locked") != sensor_names.end())) {
uhd::sensor_value_t ref_locked = usrp->get_mboard_sensor("ref_locked",0);
std::cout << boost::format("Checking RX: %s ...") % ref_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(ref_locked.to_bool());
}
//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);
//allocate recv buffer and metatdata
uhd::rx_metadata_t md;
std::vector<std::complex<float> > buff(num_bins);
//------------------------------------------------------------------
//-- Initialize
//------------------------------------------------------------------
initscr(); //curses init
rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
boost::system_time next_refresh = boost::get_system_time();
//------------------------------------------------------------------
//-- Main loop
//------------------------------------------------------------------
while (true){
//read a buffer's worth of samples every iteration
size_t num_rx_samps = rx_stream->recv(
&buff.front(), buff.size(), md
);
if (num_rx_samps != buff.size()) continue;
//check and update the display refresh condition
if (boost::get_system_time() < next_refresh) continue;
next_refresh = boost::get_system_time() + boost::posix_time::microseconds(long(1e6/frame_rate));
//calculate the dft and create the ascii art frame
acsii_art_dft::log_pwr_dft_type lpdft(
acsii_art_dft::log_pwr_dft(&buff.front(), num_rx_samps)
);
std::string frame = acsii_art_dft::dft_to_plot(
lpdft, COLS, LINES,
usrp->get_rx_rate(),
usrp->get_rx_freq(),
dyn_rng, ref_lvl
);
//curses screen handling: clear and print frame
clear();
printw("%s", frame.c_str());
//curses key handling: no timeout, any key to exit
timeout(0);
int ch = getch();
if (ch != KEY_RESIZE and ch != ERR) break;
}
//------------------------------------------------------------------
//-- Cleanup
//------------------------------------------------------------------
rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
endwin(); //curses done
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return EXIT_SUCCESS;
}
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string args, file, type, ant, subdev, ref;
size_t spb;
double rate, freq, gain, bw;
//setup the program options
po::options_description desc("Allowed options");
desc.add_options()
("help", "help message")
("args", po::value<std::string>(&args)->default_value(""), "multi uhd device address args")
("file", po::value<std::string>(&file)->default_value("usrp_samples.dat"), "name of the file to read binary samples from")
("type", po::value<std::string>(&type)->default_value("float"), "sample type: double, float, or short")
("spb", po::value<size_t>(&spb)->default_value(10000), "samples per buffer")
("rate", po::value<double>(&rate), "rate of outgoing samples")
("freq", po::value<double>(&freq), "RF center frequency in Hz")
("gain", po::value<double>(&gain), "gain for the RF chain")
("ant", po::value<std::string>(&ant), "daughterboard antenna selection")
("subdev", po::value<std::string>(&subdev), "daughterboard subdevice specification")
("bw", po::value<double>(&bw), "daughterboard IF filter bandwidth in Hz")
("ref", po::value<std::string>(&ref)->default_value("INTERNAL"), "waveform type (INTERNAL, EXTERNAL, MIMO)")
;
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 TX samples from file %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);
//Lock mboard clocks
if (ref == "MIMO") {
uhd::clock_config_t clock_config;
clock_config.ref_source = uhd::clock_config_t::REF_MIMO;
clock_config.pps_source = uhd::clock_config_t::PPS_MIMO;
usrp->set_clock_config(clock_config, 0);
}
else if (ref == "EXTERNAL") {
usrp->set_clock_config(uhd::clock_config_t::external(), 0);
}
else if (ref == "INTERNAL") {
usrp->set_clock_config(uhd::clock_config_t::internal(), 0);
}
//always select the subdevice first, the channel mapping affects the other settings
if (vm.count("subdev")) usrp->set_tx_subdev_spec(subdev);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//set the sample rate
if (not vm.count("rate")){
std::cerr << "Please specify the sample rate with --rate" << std::endl;
return ~0;
}
std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_tx_rate(rate);
std::cout << boost::format("Actual TX Rate: %f Msps...") % (usrp->get_tx_rate()/1e6) << std::endl << std::endl;
//set the center frequency
if (not vm.count("freq")){
std::cerr << "Please specify the center frequency with --freq" << std::endl;
return ~0;
}
std::cout << boost::format("Setting TX Freq: %f MHz...") % (freq/1e6) << std::endl;
usrp->set_tx_freq(freq);
std::cout << boost::format("Actual TX Freq: %f MHz...") % (usrp->get_tx_freq()/1e6) << std::endl << std::endl;
//set the rf gain
if (vm.count("gain")){
std::cout << boost::format("Setting TX Gain: %f dB...") % gain << std::endl;
usrp->set_tx_gain(gain);
std::cout << boost::format("Actual TX Gain: %f dB...") % usrp->get_tx_gain() << std::endl << std::endl;
}
//set the IF filter bandwidth
if (vm.count("bw")){
std::cout << boost::format("Setting TX Bandwidth: %f MHz...") % bw << std::endl;
usrp->set_tx_bandwidth(bw);
std::cout << boost::format("Actual TX Bandwidth: %f MHz...") % usrp->get_tx_bandwidth() << std::endl << std::endl;
}
//set the antenna
if (vm.count("ant")) usrp->set_tx_antenna(ant);
boost::this_thread::sleep(boost::posix_time::seconds(1)); //allow for some setup time
//Check Ref and LO Lock detect
std::vector<std::string> sensor_names;
sensor_names = usrp->get_tx_sensor_names(0);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked") != sensor_names.end()) {
uhd::sensor_value_t lo_locked = usrp->get_tx_sensor("lo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
sensor_names = usrp->get_mboard_sensor_names(0);
if ((ref == "MIMO") and (std::find(sensor_names.begin(), sensor_names.end(), "mimo_locked") != sensor_names.end())) {
uhd::sensor_value_t mimo_locked = usrp->get_mboard_sensor("mimo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % mimo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(mimo_locked.to_bool());
}
if ((ref == "EXTERNAL") and (std::find(sensor_names.begin(), sensor_names.end(), "ref_locked") != sensor_names.end())) {
uhd::sensor_value_t ref_locked = usrp->get_mboard_sensor("ref_locked",0);
std::cout << boost::format("Checking TX: %s ...") % ref_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(ref_locked.to_bool());
}
//send from file
if (type == "double") send_from_file<std::complex<double> >(usrp, uhd::io_type_t::COMPLEX_FLOAT64, file, spb);
else if (type == "float") send_from_file<std::complex<float> >(usrp, uhd::io_type_t::COMPLEX_FLOAT32, file, spb);
else if (type == "short") send_from_file<std::complex<short> >(usrp, uhd::io_type_t::COMPLEX_INT16, file, spb);
else throw std::runtime_error("Unknown type " + type);
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return 0;
}
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string args, file, ant, subdev, ref;
size_t total_num_samps;
double rate, freq, gain, bw;
std::string addr, port;
//setup the program options
po::options_description desc("Allowed options");
desc.add_options()
("help", "help message")
("args", po::value<std::string>(&args)->default_value(""), "multi uhd device address args")
("nsamps", po::value<size_t>(&total_num_samps)->default_value(1000), "total number of samples to receive")
("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of incoming samples")
("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
("gain", po::value<double>(&gain)->default_value(0), "gain for the RF chain")
("ant", po::value<std::string>(&ant), "daughterboard antenna selection")
("subdev", po::value<std::string>(&subdev), "daughterboard subdevice specification")
("bw", po::value<double>(&bw), "daughterboard IF filter bandwidth in Hz")
("port", po::value<std::string>(&port)->default_value("7124"), "server udp port")
("addr", po::value<std::string>(&addr)->default_value("192.168.1.10"), "resolvable server address")
("ref", po::value<std::string>(&ref)->default_value("internal"), "waveform type (internal, external, mimo)")
;
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 RX to UDP %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;
//Lock mboard clocks
usrp->set_clock_source(ref);
//set the rx sample rate
std::cout << boost::format("Setting RX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_rx_rate(rate);
std::cout << boost::format("Actual RX Rate: %f Msps...") % (usrp->get_rx_rate()/1e6) << std::endl << std::endl;
//set the rx center frequency
std::cout << boost::format("Setting RX Freq: %f Mhz...") % (freq/1e6) << std::endl;
usrp->set_rx_freq(freq);
std::cout << boost::format("Actual RX Freq: %f Mhz...") % (usrp->get_rx_freq()/1e6) << std::endl << std::endl;
//set the rx rf gain
std::cout << boost::format("Setting RX Gain: %f dB...") % gain << std::endl;
usrp->set_rx_gain(gain);
std::cout << boost::format("Actual RX Gain: %f dB...") % usrp->get_rx_gain() << std::endl << std::endl;
//set the IF filter bandwidth
if (vm.count("bw")){
std::cout << boost::format("Setting RX Bandwidth: %f MHz...") % bw << std::endl;
usrp->set_rx_bandwidth(bw);
std::cout << boost::format("Actual RX Bandwidth: %f MHz...") % usrp->get_rx_bandwidth() << std::endl << std::endl;
}
//set the antenna
if (vm.count("ant")) usrp->set_rx_antenna(ant);
boost::this_thread::sleep(boost::posix_time::seconds(1)); //allow for some setup time
//Check Ref and LO Lock detect
std::vector<std::string> sensor_names;
sensor_names = usrp->get_rx_sensor_names(0);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked") != sensor_names.end()) {
uhd::sensor_value_t lo_locked = usrp->get_rx_sensor("lo_locked",0);
std::cout << boost::format("Checking RX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
sensor_names = usrp->get_mboard_sensor_names(0);
if ((ref == "mimo") and (std::find(sensor_names.begin(), sensor_names.end(), "mimo_locked") != sensor_names.end())) {
uhd::sensor_value_t mimo_locked = usrp->get_mboard_sensor("mimo_locked",0);
std::cout << boost::format("Checking RX: %s ...") % mimo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(mimo_locked.to_bool());
}
if ((ref == "external") and (std::find(sensor_names.begin(), sensor_names.end(), "ref_locked") != sensor_names.end())) {
uhd::sensor_value_t ref_locked = usrp->get_mboard_sensor("ref_locked",0);
std::cout << boost::format("Checking RX: %s ...") % ref_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(ref_locked.to_bool());
}
//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);
//setup streaming
uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
stream_cmd.num_samps = total_num_samps;
stream_cmd.stream_now = true;
usrp->issue_stream_cmd(stream_cmd);
//loop until total number of samples reached
size_t num_acc_samps = 0; //number of accumulated samples
uhd::rx_metadata_t md;
std::vector<std::complex<float> > buff(rx_stream->get_max_num_samps());
uhd::transport::udp_simple::sptr udp_xport = uhd::transport::udp_simple::make_connected(addr, port);
while(num_acc_samps < total_num_samps){
size_t num_rx_samps = rx_stream->recv(
&buff.front(), buff.size(), md
);
//handle the error codes
switch(md.error_code){
case uhd::rx_metadata_t::ERROR_CODE_NONE:
break;
case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
if (num_acc_samps == 0) continue;
std::cout << boost::format(
"Got timeout before all samples received, possible packet loss, exiting loop..."
) << std::endl;
goto done_loop;
default:
std::cout << boost::format(
"Got error code 0x%x, exiting loop..."
) % md.error_code << std::endl;
goto done_loop;
}
//send complex single precision floating point samples over udp
udp_xport->send(boost::asio::buffer(buff, num_rx_samps*sizeof(buff.front())));
num_acc_samps += num_rx_samps;
} done_loop:
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return 0;
}
/***********************************************************************
* Main function
**********************************************************************/
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string args, wave_type, ant, subdev, ref, otw;
size_t spb;
double rate, freq, gain, wave_freq, bw;
float ampl;
//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")
("spb", po::value<size_t>(&spb)->default_value(0), "samples per buffer, 0 for default")
("rate", po::value<double>(&rate), "rate of outgoing samples")
("freq", po::value<double>(&freq), "RF center frequency in Hz")
("ampl", po::value<float>(&l)->default_value(float(0.3)), "amplitude of the waveform [0 to 0.7]")
("gain", po::value<double>(&gain), "gain for the RF chain")
("ant", po::value<std::string>(&ant), "daughterboard antenna selection")
("subdev", po::value<std::string>(&subdev), "daughterboard subdevice specification")
("bw", po::value<double>(&bw), "daughterboard IF filter bandwidth in Hz")
("wave-type", po::value<std::string>(&wave_type)->default_value("CONST"), "waveform type (CONST, SQUARE, RAMP, SINE)")
("wave-freq", po::value<double>(&wave_freq)->default_value(0), "waveform frequency in Hz")
("ref", po::value<std::string>(&ref)->default_value("internal"), "clock reference (internal, external, mimo)")
("otw", po::value<std::string>(&otw)->default_value("sc16"), "specify the over-the-wire sample mode")
;
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 TX Waveforms %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);
//Lock mboard clocks
usrp->set_clock_source(ref);
//always select the subdevice first, the channel mapping affects the other settings
if (vm.count("subdev")) usrp->set_tx_subdev_spec(subdev);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//set the sample rate
if (not vm.count("rate")){
std::cerr << "Please specify the sample rate with --rate" << std::endl;
return ~0;
}
std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_tx_rate(rate);
std::cout << boost::format("Actual TX Rate: %f Msps...") % (usrp->get_tx_rate()/1e6) << std::endl << std::endl;
//set the center frequency
if (not vm.count("freq")){
std::cerr << "Please specify the center frequency with --freq" << std::endl;
return ~0;
}
for(size_t chan = 0; chan < usrp->get_tx_num_channels(); chan++) {
std::cout << boost::format("Setting TX Freq: %f MHz...") % (freq/1e6) << std::endl;
usrp->set_tx_freq(freq, chan);
std::cout << boost::format("Actual TX Freq: %f MHz...") % (usrp->get_tx_freq(chan)/1e6) << std::endl << std::endl;
//set the rf gain
if (vm.count("gain")){
std::cout << boost::format("Setting TX Gain: %f dB...") % gain << std::endl;
usrp->set_tx_gain(gain, chan);
std::cout << boost::format("Actual TX Gain: %f dB...") % usrp->get_tx_gain(chan) << std::endl << std::endl;
}
//set the IF filter bandwidth
if (vm.count("bw")){
std::cout << boost::format("Setting TX Bandwidth: %f MHz...") % bw << std::endl;
usrp->set_tx_bandwidth(bw, chan);
std::cout << boost::format("Actual TX Bandwidth: %f MHz...") % usrp->get_tx_bandwidth(chan) << std::endl << std::endl;
}
//set the antenna
if (vm.count("ant")) usrp->set_tx_antenna(ant, chan);
}
//for the const wave, set the wave freq for small samples per period
if (wave_freq == 0 and wave_type == "CONST"){
wave_freq = usrp->get_tx_rate()/2;
}
//error when the waveform is not possible to generate
if (std::abs(wave_freq) > usrp->get_tx_rate()/2){
throw std::runtime_error("wave freq out of Nyquist zone");
}
if (usrp->get_tx_rate()/std::abs(wave_freq) > wave_table_len/2){
throw std::runtime_error("wave freq too small for table");
}
//pre-compute the waveform values
const wave_table_class wave_table(wave_type, ampl);
const size_t step = boost::math::iround(wave_freq/usrp->get_tx_rate() * wave_table_len);
size_t index = 0;
//create a transmit streamer
//linearly map channels (index0 = channel0, index1 = channel1, ...)
uhd::stream_args_t stream_args("fc32", otw);
for (size_t chan = 0; chan < usrp->get_tx_num_channels(); chan++)
stream_args.channels.push_back(chan); //linear mapping
uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);
//allocate a buffer which we re-use for each channel
if (spb == 0) spb = tx_stream->get_max_num_samps()*10;
std::vector<std::complex<float> > buff(spb);
std::vector<std::complex<float> *> buffs(usrp->get_tx_num_channels(), &buff.front());
//setup the metadata flags
uhd::tx_metadata_t md;
md.start_of_burst = true;
md.end_of_burst = false;
md.has_time_spec = true;
md.time_spec = uhd::time_spec_t(0.1);
std::cout << boost::format("Setting device timestamp to 0...") << std::endl;
usrp->set_time_now(uhd::time_spec_t(0.0));
//Check Ref and LO Lock detect
std::vector<std::string> sensor_names;
sensor_names = usrp->get_tx_sensor_names(0);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked") != sensor_names.end()) {
uhd::sensor_value_t lo_locked = usrp->get_tx_sensor("lo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
sensor_names = usrp->get_mboard_sensor_names(0);
if ((ref == "mimo") and (std::find(sensor_names.begin(), sensor_names.end(), "mimo_locked") != sensor_names.end())) {
uhd::sensor_value_t mimo_locked = usrp->get_mboard_sensor("mimo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % mimo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(mimo_locked.to_bool());
}
if ((ref == "external") and (std::find(sensor_names.begin(), sensor_names.end(), "ref_locked") != sensor_names.end())) {
uhd::sensor_value_t ref_locked = usrp->get_mboard_sensor("ref_locked",0);
std::cout << boost::format("Checking TX: %s ...") % ref_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(ref_locked.to_bool());
}
std::signal(SIGINT, &sig_int_handler);
std::cout << "Press Ctrl + C to stop streaming..." << std::endl;
//send data until the signal handler gets called
while(not stop_signal_called){
//fill the buffer with the waveform
for (size_t n = 0; n < buff.size(); n++){
buff[n] = wave_table(index += step);
}
//send the entire contents of the buffer
tx_stream->send(buffs, buff.size(), md);
md.start_of_burst = false;
md.has_time_spec = false;
}
//send a mini EOB packet
md.end_of_burst = true;
tx_stream->send("", 0, md);
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return 0;
}
/***********************************************************************
* Main function
**********************************************************************/
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string args, wave_type, ant, subdev, ref, pps, otw, channel_list;
uint64_t total_num_samps, spb;
double rate, freq, gain, wave_freq, bw;
float ampl;
//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")
("spb", po::value<uint64_t>(&spb)->default_value(0), "samples per buffer, 0 for default")
("nsamps", po::value<uint64_t>(&total_num_samps)->default_value(0), "total number of samples to transmit")
("rate", po::value<double>(&rate), "rate of outgoing samples")
("freq", po::value<double>(&freq), "RF center frequency in Hz")
("ampl", po::value<float>(&l)->default_value(float(0.3)), "amplitude of the waveform [0 to 0.7]")
("gain", po::value<double>(&gain), "gain for the RF chain")
("ant", po::value<std::string>(&ant), "antenna selection")
("subdev", po::value<std::string>(&subdev), "subdevice specification")
("bw", po::value<double>(&bw), "analog frontend filter bandwidth in Hz")
("wave-type", po::value<std::string>(&wave_type)->default_value("CONST"), "waveform type (CONST, SQUARE, RAMP, SINE)")
("wave-freq", po::value<double>(&wave_freq)->default_value(0), "waveform frequency in Hz")
("ref", po::value<std::string>(&ref)->default_value("internal"), "clock reference (internal, external, mimo, gpsdo)")
("pps", po::value<std::string>(&pps), "PPS source (internal, external, mimo, gpsdo)")
("otw", po::value<std::string>(&otw)->default_value("sc16"), "specify the over-the-wire sample mode")
("channels", po::value<std::string>(&channel_list)->default_value("0"), "which channels to use (specify \"0\", \"1\", \"0,1\", etc)")
("int-n", "tune USRP with integer-N tuning")
;
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 TX Waveforms %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);
//detect which channels to use
std::vector<std::string> channel_strings;
std::vector<size_t> channel_nums;
boost::split(channel_strings, channel_list, boost::is_any_of("\"',"));
for(size_t ch = 0; ch < channel_strings.size(); ch++){
size_t chan = boost::lexical_cast<int>(channel_strings[ch]);
if(chan >= usrp->get_tx_num_channels())
throw std::runtime_error("Invalid channel(s) specified.");
else
channel_nums.push_back(boost::lexical_cast<int>(channel_strings[ch]));
}
//Lock mboard clocks
usrp->set_clock_source(ref);
//always select the subdevice first, the channel mapping affects the other settings
if (vm.count("subdev")) usrp->set_tx_subdev_spec(subdev);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//set the sample rate
if (not vm.count("rate")){
std::cerr << "Please specify the sample rate with --rate" << std::endl;
return ~0;
}
std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_tx_rate(rate);
std::cout << boost::format("Actual TX Rate: %f Msps...") % (usrp->get_tx_rate()/1e6) << std::endl << std::endl;
//set the center frequency
if (not vm.count("freq")){
std::cerr << "Please specify the center frequency with --freq" << std::endl;
return ~0;
}
for(size_t ch = 0; ch < channel_nums.size(); ch++) {
std::cout << boost::format("Setting TX Freq: %f MHz...") % (freq/1e6) << std::endl;
uhd::tune_request_t tune_request(freq);
if(vm.count("int-n")) tune_request.args = uhd::device_addr_t("mode_n=integer");
usrp->set_tx_freq(tune_request, channel_nums[ch]);
std::cout << boost::format("Actual TX Freq: %f MHz...") % (usrp->get_tx_freq(channel_nums[ch])/1e6) << std::endl << std::endl;
//set the rf gain
if (vm.count("gain")){
std::cout << boost::format("Setting TX Gain: %f dB...") % gain << std::endl;
usrp->set_tx_gain(gain, channel_nums[ch]);
std::cout << boost::format("Actual TX Gain: %f dB...") % usrp->get_tx_gain(channel_nums[ch]) << std::endl << std::endl;
}
//set the analog frontend filter bandwidth
if (vm.count("bw")){
std::cout << boost::format("Setting TX Bandwidth: %f MHz...") % bw << std::endl;
usrp->set_tx_bandwidth(bw, channel_nums[ch]);
std::cout << boost::format("Actual TX Bandwidth: %f MHz...") % usrp->get_tx_bandwidth(channel_nums[ch]) << std::endl << std::endl;
}
//set the antenna
if (vm.count("ant")) usrp->set_tx_antenna(ant, channel_nums[ch]);
}
boost::this_thread::sleep(boost::posix_time::seconds(1)); //allow for some setup time
//for the const wave, set the wave freq for small samples per period
if (wave_freq == 0 and wave_type == "CONST"){
wave_freq = usrp->get_tx_rate()/2;
}
//error when the waveform is not possible to generate
if (std::abs(wave_freq) > usrp->get_tx_rate()/2){
throw std::runtime_error("wave freq out of Nyquist zone");
}
if (usrp->get_tx_rate()/std::abs(wave_freq) > wave_table_len/2){
throw std::runtime_error("wave freq too small for table");
}
//pre-compute the waveform values
const wave_table_class wave_table(wave_type, ampl);
const size_t step = boost::math::iround(wave_freq/usrp->get_tx_rate() * wave_table_len);
size_t index = 0;
//create a transmit streamer
//linearly map channels (index0 = channel0, index1 = channel1, ...)
uhd::stream_args_t stream_args("fc32", otw);
stream_args.channels = channel_nums;
uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);
//allocate a buffer which we re-use for each channel
if (spb == 0) spb = tx_stream->get_max_num_samps()*10;
std::vector<std::complex<float> > buff(spb);
std::vector<std::complex<float> *> buffs(channel_nums.size(), &buff.front());
std::cout << boost::format("Setting device timestamp to 0...") << std::endl;
if (channel_nums.size() > 1)
{
// Sync times
if (pps == "mimo")
{
UHD_ASSERT_THROW(usrp->get_num_mboards() == 2);
//make mboard 1 a slave over the MIMO Cable
usrp->set_time_source("mimo", 1);
//set time on the master (mboard 0)
usrp->set_time_now(uhd::time_spec_t(0.0), 0);
//sleep a bit while the slave locks its time to the master
boost::this_thread::sleep(boost::posix_time::milliseconds(100));
}
else
{
if (pps == "internal" or pps == "external" or pps == "gpsdo")
usrp->set_time_source(pps);
usrp->set_time_unknown_pps(uhd::time_spec_t(0.0));
boost::this_thread::sleep(boost::posix_time::seconds(1)); //wait for pps sync pulse
}
}
else
{
usrp->set_time_now(0.0);
}
//Check Ref and LO Lock detect
std::vector<std::string> sensor_names;
const size_t tx_sensor_chan = channel_list.empty() ? 0 : boost::lexical_cast<size_t>(channel_list[0]);
sensor_names = usrp->get_tx_sensor_names(tx_sensor_chan);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked") != sensor_names.end()) {
uhd::sensor_value_t lo_locked = usrp->get_tx_sensor("lo_locked", tx_sensor_chan);
std::cout << boost::format("Checking TX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
const size_t mboard_sensor_idx = 0;
sensor_names = usrp->get_mboard_sensor_names(mboard_sensor_idx);
if ((ref == "mimo") and (std::find(sensor_names.begin(), sensor_names.end(), "mimo_locked") != sensor_names.end())) {
uhd::sensor_value_t mimo_locked = usrp->get_mboard_sensor("mimo_locked", mboard_sensor_idx);
std::cout << boost::format("Checking TX: %s ...") % mimo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(mimo_locked.to_bool());
}
if ((ref == "external") and (std::find(sensor_names.begin(), sensor_names.end(), "ref_locked") != sensor_names.end())) {
uhd::sensor_value_t ref_locked = usrp->get_mboard_sensor("ref_locked", mboard_sensor_idx);
std::cout << boost::format("Checking TX: %s ...") % ref_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(ref_locked.to_bool());
}
std::signal(SIGINT, &sig_int_handler);
std::cout << "Press Ctrl + C to stop streaming..." << std::endl;
// Set up metadata. We start streaming a bit in the future
// to allow MIMO operation:
uhd::tx_metadata_t md;
md.start_of_burst = true;
md.end_of_burst = false;
md.has_time_spec = true;
md.time_spec = usrp->get_time_now() + uhd::time_spec_t(0.1);
//send data until the signal handler gets called
//or if we accumulate the number of samples specified (unless it's 0)
uint64_t num_acc_samps = 0;
while(true){
if (stop_signal_called) break;
if (total_num_samps > 0 and num_acc_samps >= total_num_samps) break;
//fill the buffer with the waveform
for (size_t n = 0; n < buff.size(); n++){
buff[n] = wave_table(index += step);
}
//send the entire contents of the buffer
num_acc_samps += tx_stream->send(
buffs, buff.size(), md
);
md.start_of_burst = false;
md.has_time_spec = false;
}
//send a mini EOB packet
md.end_of_burst = true;
tx_stream->send("", 0, md);
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return EXIT_SUCCESS;
}
double set_frequency(double target_freq, bool int_n_mode, bool flush = false)
{
static const double REF_DOUBLER_THRESH_FREQ = 12.5e6;
static const double PFD_FREQ_MAX = 25.0e6;
static const double BAND_SEL_FREQ_MAX = 100e3;
static const double VCO_FREQ_MIN = 2.2e9;
static const double VCO_FREQ_MAX = 4.4e9;
//Default invalid value for actual_freq
double actual_freq = 0;
uhd::range_t rf_divider_range = _get_rfdiv_range();
uhd::range_t int_range = get_int_range();
double pfd_freq = 0;
boost::uint16_t R = 0, BS = 0, N = 0, FRAC = 0, MOD = 0;
boost::uint16_t RFdiv = static_cast<boost::uint16_t>(rf_divider_range.start());
bool D = false, T = false;
//Reference doubler for 50% duty cycle
D = (_reference_freq <= REF_DOUBLER_THRESH_FREQ);
//increase RF divider until acceptable VCO frequency
double vco_freq = target_freq;
while (vco_freq < VCO_FREQ_MIN && RFdiv < static_cast<boost::uint16_t>(rf_divider_range.stop())) {
vco_freq *= 2;
RFdiv *= 2;
}
/*
* The goal here is to loop though possible R dividers,
* band select clock dividers, N (int) dividers, and FRAC
* (frac) dividers.
*
* Calculate the N and F dividers for each set of values.
* The loop exits when it meets all of the constraints.
* The resulting loop values are loaded into the registers.
*
* from pg.21
*
* f_pfd = f_ref*(1+D)/(R*(1+T))
* f_vco = (N + (FRAC/MOD))*f_pfd
* N = f_vco/f_pfd - FRAC/MOD = f_vco*((R*(T+1))/(f_ref*(1+D))) - FRAC/MOD
* f_actual = f_vco/RFdiv)
*/
double feedback_freq = _fb_after_divider ? target_freq : vco_freq;
for(R = 1; R <= 1023; R+=1){
//PFD input frequency = f_ref/R ... ignoring Reference doubler/divide-by-2 (D & T)
pfd_freq = _reference_freq*(D?2:1)/(R*(T?2:1));
//keep the PFD frequency at or below 25MHz (Loop Filter Bandwidth)
if (pfd_freq > PFD_FREQ_MAX) continue;
//First, ignore fractional part of tuning
N = boost::uint16_t(std::floor(feedback_freq/pfd_freq));
//keep N > minimum int divider requirement
if (N < static_cast<boost::uint16_t>(int_range.start())) continue;
for(BS=1; BS <= 255; BS+=1){
//keep the band select frequency at or below band_sel_freq_max
//constraint on band select clock
if (pfd_freq/BS > BAND_SEL_FREQ_MAX) continue;
goto done_loop;
}
} done_loop:
//Fractional-N calculation
MOD = 4095; //max fractional accuracy
FRAC = static_cast<boost::uint16_t>(boost::math::round((feedback_freq/pfd_freq - N)*MOD));
if (int_n_mode) {
if (FRAC > (MOD / 2)) { //Round integer such that actual freq is closest to target
N++;
}
FRAC = 0;
}
//Reference divide-by-2 for 50% duty cycle
// if R even, move one divide by 2 to to regs.reference_divide_by_2
if(R % 2 == 0) {
T = true;
R /= 2;
}
//Typical phase resync time documented in data sheet pg.24
static const double PHASE_RESYNC_TIME = 400e-6;
//If feedback after divider, then compensation for the divider is pulled into the INT value
int rf_div_compensation = _fb_after_divider ? 1 : RFdiv;
//Compute the actual frequency in terms of _reference_freq, N, FRAC, MOD, D, R and T.
actual_freq = (
double((N + (double(FRAC)/double(MOD))) *
(_reference_freq*(D?2:1)/(R*(T?2:1))))
) / rf_div_compensation;
_regs.frac_12_bit = FRAC;
_regs.int_16_bit = N;
_regs.mod_12_bit = MOD;
_regs.clock_divider_12_bit = std::max<boost::uint16_t>(1, boost::uint16_t(std::ceil(PHASE_RESYNC_TIME*pfd_freq/MOD)));
_regs.feedback_select = _fb_after_divider ?
adf435x_regs_t::FEEDBACK_SELECT_DIVIDED :
adf435x_regs_t::FEEDBACK_SELECT_FUNDAMENTAL;
_regs.clock_div_mode = _fb_after_divider ?
adf435x_regs_t::CLOCK_DIV_MODE_RESYNC_ENABLE :
adf435x_regs_t::CLOCK_DIV_MODE_FAST_LOCK;
_regs.r_counter_10_bit = R;
_regs.reference_divide_by_2 = T ?
adf435x_regs_t::REFERENCE_DIVIDE_BY_2_ENABLED :
adf435x_regs_t::REFERENCE_DIVIDE_BY_2_DISABLED;
_regs.reference_doubler = D ?
adf435x_regs_t::REFERENCE_DOUBLER_ENABLED :
adf435x_regs_t::REFERENCE_DOUBLER_DISABLED;
_regs.band_select_clock_div = boost::uint8_t(BS);
_regs.rf_divider_select = static_cast<typename adf435x_regs_t::rf_divider_select_t>(_get_rfdiv_setting(RFdiv));
_regs.ldf = int_n_mode ?
adf435x_regs_t::LDF_INT_N :
adf435x_regs_t::LDF_FRAC_N;
std::string tuning_str = (int_n_mode) ? "Integer-N" : "Fractional";
UHD_LOGV(often)
<< boost::format("ADF 435X Frequencies (MHz): REQUESTED=%0.9f, ACTUAL=%0.9f"
) % (target_freq/1e6) % (actual_freq/1e6) << std::endl
<< boost::format("ADF 435X Intermediates (MHz): Feedback=%0.2f, VCO=%0.2f, PFD=%0.2f, BAND=%0.2f, REF=%0.2f"
) % (feedback_freq/1e6) % (vco_freq/1e6) % (pfd_freq/1e6) % (pfd_freq/BS/1e6) % (_reference_freq/1e6) << std::endl
<< boost::format("ADF 435X Tuning: %s") % tuning_str.c_str() << std::endl
<< boost::format("ADF 435X Settings: R=%d, BS=%d, N=%d, FRAC=%d, MOD=%d, T=%d, D=%d, RFdiv=%d"
) % R % BS % N % FRAC % MOD % T % D % RFdiv << std::endl;
UHD_ASSERT_THROW((_regs.frac_12_bit & ((boost::uint16_t)~0xFFF)) == 0);
UHD_ASSERT_THROW((_regs.mod_12_bit & ((boost::uint16_t)~0xFFF)) == 0);
UHD_ASSERT_THROW((_regs.clock_divider_12_bit & ((boost::uint16_t)~0xFFF)) == 0);
UHD_ASSERT_THROW((_regs.r_counter_10_bit & ((boost::uint16_t)~0x3FF)) == 0);
UHD_ASSERT_THROW(vco_freq >= VCO_FREQ_MIN and vco_freq <= VCO_FREQ_MAX);
UHD_ASSERT_THROW(RFdiv >= static_cast<boost::uint16_t>(rf_divider_range.start()));
UHD_ASSERT_THROW(RFdiv <= static_cast<boost::uint16_t>(rf_divider_range.stop()));
UHD_ASSERT_THROW(_regs.int_16_bit >= static_cast<boost::uint16_t>(int_range.start()));
UHD_ASSERT_THROW(_regs.int_16_bit <= static_cast<boost::uint16_t>(int_range.stop()));
if (flush) commit();
return actual_freq;
}
//! Return the index of a radio component, given a slot name. This means DSPs, radio_perifs
size_t get_radio_index(const std::string &slot_name) {
UHD_ASSERT_THROW(slot_name == "A" or slot_name == "B");
return slot_name == "A" ? 0 : 1;
}
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string args, sync, subdev;
double seconds_in_future;
size_t total_num_samps;
double rate;
//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")
("secs", po::value<double>(&seconds_in_future)->default_value(1.5), "number of seconds in the future to receive")
("nsamps", po::value<size_t>(&total_num_samps)->default_value(10000), "total number of samples to receive")
("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of incoming samples")
("sync", po::value<std::string>(&sync)->default_value("now"), "synchronization method: now, pps, mimo")
("subdev", po::value<std::string>(&subdev), "subdev spec (homogeneous across motherboards)")
("dilv", "specify to disable inner-loop verbose")
;
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 RX Multi Samples %s") % desc << std::endl;
std::cout <<
" This is a demonstration of how to receive aligned data from multiple channels.\n"
" This example can receive from multiple DSPs, multiple motherboards, or both.\n"
" The MIMO cable or PPS can be used to synchronize the configuration. See --sync\n"
"\n"
" Specify --subdev to select multiple channels per motherboard.\n"
" Ex: --subdev=\"0:A 0:B\" to get 2 channels on a Basic RX.\n"
"\n"
" Specify --args to select multiple motherboards in a configuration.\n"
" Ex: --args=\"addr0=192.168.10.2, addr1=192.168.10.3\"\n"
<< std::endl;
return ~0;
}
bool verbose = vm.count("dilv") == 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);
//always select the subdevice first, the channel mapping affects the other settings
if (vm.count("subdev")) usrp->set_rx_subdev_spec(subdev); //sets across all mboards
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//set the rx sample rate (sets across all channels)
std::cout << boost::format("Setting RX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_rx_rate(rate);
std::cout << boost::format("Actual RX Rate: %f Msps...") % (usrp->get_rx_rate()/1e6) << std::endl << std::endl;
std::cout << boost::format("Setting device timestamp to 0...") << std::endl;
if (sync == "now"){
//This is not a true time lock, the devices will be off by a few RTT.
//Rather, this is just to allow for demonstration of the code below.
usrp->set_time_now(uhd::time_spec_t(0.0));
}
else if (sync == "pps"){
usrp->set_time_source("external");
usrp->set_time_unknown_pps(uhd::time_spec_t(0.0));
boost::this_thread::sleep(boost::posix_time::seconds(1)); //wait for pps sync pulse
}
else if (sync == "mimo"){
UHD_ASSERT_THROW(usrp->get_num_mboards() == 2);
//make mboard 1 a slave over the MIMO Cable
usrp->set_clock_source("mimo", 1);
usrp->set_time_source("mimo", 1);
//set time on the master (mboard 0)
usrp->set_time_now(uhd::time_spec_t(0.0), 0);
//sleep a bit while the slave locks its time to the master
boost::this_thread::sleep(boost::posix_time::milliseconds(100));
}
//create a receive streamer
//linearly map channels (index0 = channel0, index1 = channel1, ...)
uhd::stream_args_t stream_args("fc32"); //complex floats
for (size_t chan = 0; chan < usrp->get_rx_num_channels(); chan++)
stream_args.channels.push_back(chan); //linear mapping
uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);
//setup streaming
std::cout << std::endl;
std::cout << boost::format(
"Begin streaming %u samples, %f seconds in the future..."
) % total_num_samps % seconds_in_future << std::endl;
uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
stream_cmd.num_samps = total_num_samps;
stream_cmd.stream_now = false;
stream_cmd.time_spec = uhd::time_spec_t(seconds_in_future);
usrp->issue_stream_cmd(stream_cmd); //tells all channels to stream
//meta-data will be filled in by recv()
uhd::rx_metadata_t md;
//allocate buffers to receive with samples (one buffer per channel)
const size_t samps_per_buff = rx_stream->get_max_num_samps();
std::vector<std::vector<std::complex<float> > > buffs(
usrp->get_rx_num_channels(), std::vector<std::complex<float> >(samps_per_buff)
);
//create a vector of pointers to point to each of the channel buffers
std::vector<std::complex<float> *> buff_ptrs;
for (size_t i = 0; i < buffs.size(); i++) buff_ptrs.push_back(&buffs[i].front());
//the first call to recv() will block this many seconds before receiving
double timeout = seconds_in_future + 0.1; //timeout (delay before receive + padding)
size_t num_acc_samps = 0; //number of accumulated samples
while(num_acc_samps < total_num_samps){
//receive a single packet
size_t num_rx_samps = rx_stream->recv(
buff_ptrs, samps_per_buff, md, timeout
);
//use a small timeout for subsequent packets
timeout = 0.1;
//handle the error code
if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_TIMEOUT) break;
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));
}
if(verbose) 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;
num_acc_samps += num_rx_samps;
}
if (num_acc_samps < total_num_samps) std::cerr << "Receive timeout before all samples received..." << std::endl;
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return 0;
}
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
std::string args, tx_file, rx_file, type, ref, wire_format, cpu_format;
size_t samples_per_buff;
double rate, freq, tx_gain, rx_gain, rx_bw, delay, lo_off;
rx_bw = RX_BW;
rx_gain = RX_GAIN;
wire_format = WIRE_FORMAT;
cpu_format = CPU_FORMAT;
rate = SAMP_RATE;
args = ARGS;
ref = REF_CLOCK;
freq = CENT_FREQ;
tx_gain = TX_GAIN;
samples_per_buff = SAMPLES_PER_BUFFER;
tx_file = TX_FILENAME;
rx_file = RX_FILENAME;
//------------------INIT TX------------------
//Set the scheduling priority on the current thread. Same as set_thread_priority but does not throw on failure.
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); //Make the usrp by calling the constructor with param the args
usrp->set_clock_source(ref); //Set the clock source for the usrp device. This sets the source for a 10 MHz reference clock. Typical options for source: internal, external, MIMO.
std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_tx_rate(rate); //Set the sample rate
std::cout << boost::format("Actual TX Rate: %f Msps...") % (usrp->get_tx_rate()/1e6) << std::endl << std::endl;
std::cout << boost::format("Setting TX Freq: %f MHz...") % (freq/1e6) << std::endl; //Set up tuning frequency
uhd::tune_request_t tune_request;
tune_request = uhd::tune_request_t(freq); //Generate the tune request
usrp->set_tx_freq(tune_request); //Tune to CENT_FREQ
std::cout << boost::format("Actual TX Freq: %f MHz...") % (usrp->get_tx_freq()/1e6) << std::endl << std::endl; //PRINT Actual CENT_FREQ
std::cout << boost::format("Setting TX Gain: %f dB...") % tx_gain << std::endl;
usrp->set_tx_gain(tx_gain); //Set the tx_gain
std::cout << boost::format("Actual TX Gain: %f dB...") % usrp->get_tx_gain() << std::endl << std::endl;
//------------------CHECK STUFF------------------
//Check Ref and LO Lock detect
std::vector<std::string> sensor_names;
sensor_names = usrp->get_tx_sensor_names(0);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked") != sensor_names.end()) {
uhd::sensor_value_t lo_locked = usrp->get_tx_sensor("lo_locked",0);
std::cout << boost::format("Checking TX: %s ...") % lo_locked.to_pp_string() << std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
//------------------INIT TX STREAM------------------
//create a transmit streamer
uhd::stream_args_t stream_args(cpu_format, wire_format); //Call the constructor of the class stream_args_t and generate the stream_args object with inputs the cpu_format and wire_format (this is the format per sample)
uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args); //Generate a tx_streamer object named tx_stream using the usrp->get_tx_stream(stream_args). Remember, usrp is already initialized
//Setup tx_metadata
uhd::tx_metadata_t tx_md; //TX metadata structure for describing received IF data. Includes time specification, and start and stop burst flags. The send routines will convert the metadata to IF data headers.
tx_md.start_of_burst = false; //Set start of burst to true for the first packet in the chain. ?
tx_md.end_of_burst = false;
//------------------LOAD DATA AND TX------------------
std::vector<std::complex<float> > tx_buff(samples_per_buff);
std::ifstream infile(tx_file.c_str(), std::ifstream::binary);
if(!infile.good()){
std::cout << "IN File error\n";
return 0;
}
//loop until the entire file has been read
int i = 0;
for (int i = 0; i < samples_per_buff; ++i){
infile.read((char*)&tx_buff.at(i), tx_buff.size()*sizeof(std::complex<float>));
// std::cout << tx_buff.at(i) << ' ';
}
tx_stream->send(&tx_buff.front(), samples_per_buff, tx_md);
infile.close(); //Close the file pointer
//------------------INIT RX------------------
//IS THIS NECESSARY?
//always select the subdevice first, the channel mapping affects the other settings
//usrp->set_rx_subdev_spec(subdev);
std::cout << boost::format("Setting RX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_rx_rate(rate);
std::cout << boost::format("Actual RX Rate: %f Msps...") % (usrp->get_rx_rate()/1e6) << std::endl << std::endl;
//set the center frequency
std::cout << boost::format("Setting RX Freq: %f MHz...") % (freq/1e6) << std::endl;
usrp->set_rx_freq(tune_request);
std::cout << boost::format("Actual RX Freq: %f MHz...") % (usrp->get_rx_freq()/1e6) << std::endl << std::endl;
std::cout << boost::format("Setting RX Gain: %f dB...") % rx_gain << std::endl;
usrp->set_rx_gain(rx_gain);
std::cout << boost::format("Actual RX Gain: %f dB...") % usrp->get_rx_gain() << std::endl << std::endl;
boost::this_thread::sleep(boost::posix_time::seconds(1)); //allow 1sec setup time
//------------------CHECK STUFF------------------
//Always check for locked sensor
check_locked_sensor(usrp->get_rx_sensor_names(0), "lo_locked", boost::bind(&uhd::usrp::multi_usrp::get_rx_sensor, usrp, _1, 0), 1);
//------------------INIT RX STREAM---------------
//create a receive streamer with the same args as TX
uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);
uhd::rx_metadata_t rx_md;
std::vector<std::complex<float> > rx_buff(samples_per_buff);
std::ofstream outfile;
outfile.open(rx_file.c_str(), std::ofstream::binary);
if(!outfile.good()){
std::cout << "OUT File error\n";
return 0;
}
//If RX_CONT == 1 enable continuoys sampling else just sent some packets and done
uhd::stream_cmd_t stream_cmd((RX_CONT == 1)?
uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS:
uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE
);
stream_cmd.num_samps = samples_per_buff; //You might have a problem here...
stream_cmd.stream_now = true; //Start streaming ASAP
stream_cmd.time_spec = uhd::time_spec_t(); //Setup the time to the USRP time (Why??)
rx_stream->issue_stream_cmd(stream_cmd); //Issue a stream command to the usrp device. This tells the usrp to send samples into the host. See the documentation for stream_cmd_t for more info.
size_t num_rx_samps = rx_stream->recv(&rx_buff.front(), rx_buff.size(), rx_md, 10.0, false); // Receive buffers containing samples described by the metadata.
std::cout << "Samples received in a single shot: " << num_rx_samps << std::endl;
if (outfile.is_open()){
outfile.write((const char*)&rx_buff.front(), num_rx_samps*sizeof(std::complex<float>)-1);
}
return EXIT_SUCCESS;
}