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/* -*- c++ -*- */
/*
* 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_mimo_source.h>
#include <gr_io_signature.h>
#include <stdexcept>
#include "utils.h"
/***********************************************************************
* UHD Source
**********************************************************************/
uhd_mimo_source::uhd_mimo_source(gr_io_signature_sptr sig)
:gr_sync_block("uhd mimo source", gr_make_io_signature(0, 0, 0), sig){
/* NOP */
}
/***********************************************************************
* UHD Source Impl
**********************************************************************/
class uhd_mimo_source_impl : public uhd_mimo_source{
public:
uhd_mimo_source_impl(
size_t num_channels,
const std::string &args,
const uhd::io_type_t &type
) : uhd_mimo_source(gr_make_io_signature(num_channels, num_channels, type.size)), _type(type)
{
_dev = uhd::usrp::mimo_usrp::make(args);
set_streaming(false);
_dev->set_time_unknown_pps(uhd::time_spec_t()); //TODO may want option to disable this
}
~uhd_mimo_source_impl(void){
set_streaming(false);
}
void set_subdev_spec(size_t chan, const std::string &spec){
return _dev->set_rx_subdev_spec(chan, spec);
}
void set_samp_rate_all(double rate){
_dev->set_rx_rate_all(rate);
do_samp_rate_error_message(rate, get_samp_rate_all(), "RX");
}
double get_samp_rate_all(void){
return _dev->get_rx_rate_all();
}
uhd::tune_result_t set_center_freq(size_t chan, double freq){
uhd::tune_result_t tr = _dev->set_rx_freq(chan, freq);
do_tune_freq_error_message(freq, _dev->get_rx_freq(chan), "RX");
return tr;
}
uhd::freq_range_t get_freq_range(size_t chan){
return _dev->get_rx_freq_range(chan);
}
void set_gain(size_t chan, float gain){
return _dev->set_rx_gain(chan, gain);
}
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(size_t chan, const std::string &ant){
return _dev->set_rx_antenna(chan, ant);
}
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);
}
uhd::time_spec_t get_time_now(void){
return _dev->get_time_now();
}
void set_time_next_pps(const uhd::time_spec_t &time_spec){
return _dev->set_time_next_pps(time_spec);
}
uhd::usrp::mimo_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
){
//conditionally start streaming in the work call
//this prevents streaming before the runtime is ready
if (not _is_streaming) set_streaming(true);
uhd::rx_metadata_t metadata; //not passed out of this block
return _dev->get_device()->recv(
output_items, noutput_items, metadata,
_type, uhd::device::RECV_MODE_FULL_BUFF
);
}
protected:
uhd::usrp::mimo_usrp::sptr _dev;
const uhd::io_type_t _type;
bool _is_streaming;
void set_streaming(bool enb){
if (enb){
//setup a stream command that starts streaming slightly in the future
static const double reasonable_delay = 0.01; //10 ms (order of magnitude >> RTT)
uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
stream_cmd.stream_now = false;
stream_cmd.time_spec = get_time_now() + uhd::time_spec_t(_dev->get_num_channels() * reasonable_delay);
_dev->issue_stream_cmd(stream_cmd);
}
else
_dev->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
_is_streaming = enb;
}
};
/***********************************************************************
* Make UHD Source
**********************************************************************/
boost::shared_ptr<uhd_mimo_source> uhd_make_mimo_source(
size_t num_channels,
const std::string &args,
const uhd::io_type_t::tid_t &type
){
return boost::shared_ptr<uhd_mimo_source>(
new uhd_mimo_source_impl(num_channels, args, type)
);
}
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