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/*
* Copyright 2010 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include <uhd_single_usrp_source.h>
#include <gr_io_signature.h>
#include <stdexcept>
#include <iostream>
#include <boost/format.hpp>
/***********************************************************************
* UHD Single USRP Source
**********************************************************************/
uhd_single_usrp_source::uhd_single_usrp_source(gr_io_signature_sptr sig)
:gr_sync_block("uhd single_usrp source", gr_make_io_signature(0, 0, 0), sig)
{
d_num_packet_samps = 0;
d_tstamp_pair = pmt::mp(pmt::mp(0), pmt::mp(0));
}
/***********************************************************************
* UHD Single USRP Source Impl
**********************************************************************/
class uhd_single_usrp_source_impl : public uhd_single_usrp_source{
public:
uhd_single_usrp_source_impl(
const std::string &device_addr,
const uhd::io_type_t &io_type,
size_t num_channels
):
uhd_single_usrp_source(gr_make_io_signature(
num_channels, num_channels, io_type.size
)),
_type(io_type)
{
_dev = uhd::usrp::single_usrp::make(device_addr);
}
void set_subdev_spec(const std::string &spec){
return _dev->set_rx_subdev_spec(spec);
}
void set_samp_rate(double rate){
_dev->set_rx_rate(rate);
}
double get_samp_rate(void){
return _dev->get_rx_rate();
}
uhd::tune_result_t set_center_freq(
const uhd::tune_request_t tune_request, size_t chan
){
return _dev->set_rx_freq(tune_request, chan);
}
uhd::freq_range_t get_freq_range(size_t chan){
return _dev->get_rx_freq_range(chan);
}
void set_gain(float gain, size_t chan){
return _dev->set_rx_gain(gain, chan);
}
float get_gain(size_t chan){
return _dev->get_rx_gain(chan);
}
uhd::gain_range_t get_gain_range(size_t chan){
return _dev->get_rx_gain_range(chan);
}
void set_antenna(const std::string &ant, size_t chan){
return _dev->set_rx_antenna(ant, chan);
}
std::string get_antenna(size_t chan){
return _dev->get_rx_antenna(chan);
}
std::vector<std::string> get_antennas(size_t chan){
return _dev->get_rx_antennas(chan);
}
void set_bandwidth(double bandwidth, size_t chan){
return _dev->set_rx_bandwidth(bandwidth, chan);
}
void set_clock_config(const uhd::clock_config_t &clock_config){
return _dev->set_clock_config(clock_config);
}
uhd::time_spec_t get_time_now(void){
return _dev->get_time_now();
}
void set_time_now(const uhd::time_spec_t &time_spec){
return _dev->set_time_now(time_spec);
}
void set_time_next_pps(const uhd::time_spec_t &time_spec){
return _dev->set_time_next_pps(time_spec);
}
uhd::usrp::single_usrp::sptr get_device(void){
return _dev;
}
/***********************************************************************
* Work
**********************************************************************/
int work(
int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items
){
uhd::rx_metadata_t metadata; //not passed out of this block
size_t total_samps = 0;
while(total_samps + 362 < (size_t)noutput_items) {
size_t num_samps = _dev->get_device()->recv(
output_items, noutput_items, metadata,
//_type, uhd::device::RECV_MODE_FULL_BUFF
_type, uhd::device::RECV_MODE_ONE_PACKET
);
total_samps += num_samps;
switch(metadata.error_code){
case uhd::rx_metadata_t::ERROR_CODE_NONE:
//keep track of the number of accumulated samples in this packet
if (metadata.fragment_offset == 0) {
d_num_packet_samps = 0;
d_tstamp_pair = pmt::mp(pmt::mp(metadata.time_spec.get_full_secs()),
pmt::mp(metadata.time_spec.get_frac_secs()));
}
d_num_packet_samps += num_samps;
//don't push on to the queue until we get the final fragment
if (!metadata.more_fragments) {
// Create tags with time and num samples
pmt::pmt_t tsamp, nsamp;
pmt::pmt_t nsamp_val = pmt::mp((int)d_num_packet_samps);
add_item_tag(0, nitems_written(0),
pmt::mp("packet_time_stamp"),
d_tstamp_pair,
pmt::mp("uhd_single_usrp_source"));
add_item_tag(0, nitems_written(0),
pmt::mp("num_packet_samples"),
nsamp_val,
pmt::mp("uhd_single_usrp_source"));
}
return num_samps;
case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
//ignore overflows and try work again
return work(noutput_items, input_items, output_items);
default:
std::cout << boost::format(
"UHD source block got error code 0x%x"
) % metadata.error_code << std::endl;
return num_samps;
}
}
return -1;
}
bool start(void){
_dev->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
return true;
}
bool stop(void){
_dev->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
return true;
}
private:
uhd::usrp::single_usrp::sptr _dev;
const uhd::io_type_t _type;
};
/***********************************************************************
* Make UHD Single USRP Source
**********************************************************************/
boost::shared_ptr<uhd_single_usrp_source> uhd_make_single_usrp_source(
const std::string &device_addr,
const uhd::io_type_t::tid_t &io_type,
size_t num_channels
){
return boost::shared_ptr<uhd_single_usrp_source>(
new uhd_single_usrp_source_impl(device_addr, io_type, num_channels)
);
}
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