/*!
* \file osmosdr_signal_source.cc
* \brief Signal source for the Realtek RTL2832U USB dongle DVB-T receiver
* (see http://sdr.osmocom.org/trac/wiki/rtl-sdr for more information)
* \author Javier Arribas, 2012. jarribas(at)cttc.es
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2015 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR 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 of the License, or
* (at your option) any later version.
*
* GNSS-SDR 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 GNSS-SDR. If not, see .
*
* -------------------------------------------------------------------------
*/
#include "osmosdr_signal_source.h"
#include
#include
#include
#include
#include "configuration_interface.h"
#include "gnss_sdr_valve.h"
#include "GPS_L1_CA.h"
using google::LogMessage;
OsmosdrSignalSource::OsmosdrSignalSource(ConfigurationInterface* configuration,
std::string role, unsigned int in_stream, unsigned int out_stream,
boost::shared_ptr queue) :
role_(role), in_stream_(in_stream), out_stream_(out_stream),
queue_(queue)
{
// DUMP PARAMETERS
std::string empty = "";
std::string default_dump_file = "./data/signal_source.dat";
std::string default_item_type = "gr_complex";
samples_ = configuration->property(role + ".samples", 0);
dump_ = configuration->property(role + ".dump", false);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_file);
// OSMOSDR Driver parameters
AGC_enabled_ = configuration->property(role + ".AGC_enabled", true);
freq_ = configuration->property(role + ".freq", GPS_L1_FREQ_HZ);
gain_ = configuration->property(role + ".gain", (double)40.0);
rf_gain_ = configuration->property(role + ".rf_gain", (double)40.0);
if_gain_ = configuration->property(role + ".if_gain", (double)40.0);
sample_rate_ = configuration->property(role + ".sampling_frequency", (double)2.0e6);
item_type_ = configuration->property(role + ".item_type", default_item_type);
osmosdr_args_ = configuration->property(role + ".osmosdr_args", std::string( ));
if (item_type_.compare("short") == 0)
{
item_size_ = sizeof(short);
}
else if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
// 1. Make the driver instance
try
{
if (!osmosdr_args_.empty())
{
std::cout << "OsmoSdr arguments: " << osmosdr_args_ << std::endl;
LOG(INFO) << "OsmoSdr arguments: " << osmosdr_args_;
}
osmosdr_source_ = osmosdr::source::make(osmosdr_args_);
}
catch( const boost::exception & e )
{
DLOG(FATAL) << "Boost exception: " << boost::diagnostic_information(e);
}
// 2 set sampling rate
osmosdr_source_->set_sample_rate(sample_rate_);
std::cout << boost::format("Actual RX Rate: %f [SPS]...") % (osmosdr_source_->get_sample_rate()) << std::endl ;
LOG(INFO) << boost::format("Actual RX Rate: %f [SPS]...") % (osmosdr_source_->get_sample_rate());
// 3. set rx frequency
osmosdr_source_->set_center_freq(freq_);
std::cout << boost::format("Actual RX Freq: %f [Hz]...") % (osmosdr_source_->get_center_freq()) << std::endl ;
LOG(INFO) << boost::format("Actual RX Freq: %f [Hz]...") % (osmosdr_source_->get_center_freq());
// TODO: Assign the remnant IF from the PLL tune error
std::cout << boost::format("PLL Frequency tune error %f [Hz]...") % (osmosdr_source_->get_center_freq() - freq_) ;
LOG(INFO) << boost::format("PLL Frequency tune error %f [Hz]...") % (osmosdr_source_->get_center_freq() - freq_) ;
// 4. set rx gain
if (this->AGC_enabled_ == true)
{
osmosdr_source_->set_gain_mode(true);
std::cout << "AGC enabled" << std::endl;
LOG(INFO) << "AGC enabled";
}
else
{
osmosdr_source_->set_gain_mode(false);
osmosdr_source_->set_gain(gain_, 0);
osmosdr_source_->set_if_gain(rf_gain_, 0);
osmosdr_source_->set_bb_gain(if_gain_, 0);
std::cout << boost::format("Actual RX Gain: %f dB...") % osmosdr_source_->get_gain() << std::endl;
LOG(INFO) << boost::format("Actual RX Gain: %f dB...") % osmosdr_source_->get_gain();
}
}
else
{
LOG(WARNING) << item_type_ << " unrecognized item type. Using short.";
item_size_ = sizeof(short);
}
if (samples_ != 0)
{
DLOG(INFO) << "Send STOP signal after " << samples_ << " samples";
valve_ = gnss_sdr_make_valve(item_size_, samples_, queue_);
DLOG(INFO) << "valve(" << valve_->unique_id() << ")";
}
if (dump_)
{
DLOG(INFO) << "Dumping output into file " << dump_filename_;
file_sink_ = gr::blocks::file_sink::make(item_size_, dump_filename_.c_str());
DLOG(INFO) << "file_sink(" << file_sink_->unique_id() << ")";
}
}
OsmosdrSignalSource::~OsmosdrSignalSource()
{}
void OsmosdrSignalSource::connect(gr::top_block_sptr top_block)
{
if (samples_ != 0)
{
top_block->connect(osmosdr_source_, 0, valve_, 0);
DLOG(INFO) << "connected osmosdr source to valve";
if (dump_)
{
top_block->connect(valve_, 0, file_sink_, 0);
DLOG(INFO) << "connected valve to file sink";
}
}
else
{
if (dump_)
{
top_block->connect(osmosdr_source_, 0, file_sink_, 0);
DLOG(INFO) << "connected osmosdr source to file sink";
}
}
}
void OsmosdrSignalSource::disconnect(gr::top_block_sptr top_block)
{
if (samples_ != 0)
{
top_block->disconnect(osmosdr_source_, 0, valve_, 0);
if (dump_)
{
top_block->disconnect(valve_, 0, file_sink_, 0);
}
}
else
{
if (dump_)
{
top_block->disconnect(osmosdr_source_, 0, file_sink_, 0);
}
}
}
gr::basic_block_sptr OsmosdrSignalSource::get_left_block()
{
LOG(WARNING) << "Trying to get signal source left block.";
return gr::basic_block_sptr();
}
gr::basic_block_sptr OsmosdrSignalSource::get_right_block()
{
if (samples_ != 0)
{
return valve_;
}
else
{
return osmosdr_source_;
}
}