Added support for the Realtek RTL2832U OsmoSDR signal source. The Rtlsdr_Signal_Source adapter compilation is optional. See GNSS-SDR README for more information.

git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@220 64b25241-fba3-4117-9849-534c7e92360d

src/algorithms/signal_source/adapters/jamfile.jam

@@ -2,6 +2,7 @@ project : build-dir ../../../../build ;
 
 #ECHO Global: [ VARNAMES ] ;
 local GN3S_DRIVER = [ modules.peek : GN3S_DRIVER ] ; 
+local RTLSDR_DRIVER = [ modules.peek : RTLSDR_DRIVER ] ; 
 
 obj file_signal_source : file_signal_source.cc ;
 obj uhd_signal_source : uhd_signal_source.cc ;
@@ -11,3 +12,7 @@ if ($(GN3S_DRIVER))
 	obj gn3s_signal_source : gn3s_signal_source.cc ;
 }
 
+if ($(RTLSDR_DRIVER))
+{
+	obj rtlsdr_signal_source : rtlsdr_signal_source.cc ;	
+}

src/algorithms/signal_source/adapters/rtlsdr_signal_source.cc

@@ -0,0 +1,197 @@
+/*!
+ * \file rtlsdr_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) 2010-2012  (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 <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#include "rtlsdr_signal_source.h"
+#include <osmosdr_api.h>
+#include <osmosdr_source_c.h>
+#include <gnuradio/gr_file_sink.h>
+#include "configuration_interface.h"
+#include "gnss_sdr_valve.h"
+#include <glog/log_severity.h>
+#include <glog/logging.h>
+#include <iostream>
+#include "GPS_L1_CA.h"
+#include <boost/format.hpp>
+
+using google::LogMessage;
+
+
+RtlsdrSignalSource::RtlsdrSignalSource(ConfigurationInterface* configuration,
+        std::string role, unsigned int in_stream, unsigned int out_stream,
+        gr_msg_queue_sptr 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);
+
+    // RTLSDR 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)50.0);
+    sample_rate_ = configuration->property(role + ".sampling_frequency", (double)2.0e6);
+
+    item_type_ = configuration->property(role + ".item_type",
+            default_item_type);
+    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
+            rtlsdr_source_ = osmosdr_make_source_c();
+
+            // 2 set sampling rate
+            rtlsdr_source_->set_sample_rate(sample_rate_);
+            std::cout << boost::format("Actual RX Rate: %f [SPS]...") % (rtlsdr_source_->get_sample_rate()) << std::endl ;
+            DLOG(INFO) << boost::format("Actual RX Rate: %f [SPS]...") % (rtlsdr_source_->get_sample_rate()) << std::endl;
+
+            // 3. set rx frequency
+            rtlsdr_source_->set_center_freq(freq_);
+            std::cout << boost::format("Actual RX Freq: %f [Hz]...") % (rtlsdr_source_->get_center_freq()) << std::endl ;
+            DLOG(INFO) << boost::format("Actual RX Freq: %f [Hz]...") % (rtlsdr_source_->get_center_freq()) << std::endl ;
+
+            // TODO: Asign the remanent IF from the PLL tune error
+            std::cout << boost::format("PLL Frequency tune error %f [Hz]...") % (rtlsdr_source_->get_center_freq()-freq_) ;
+            DLOG(INFO) <<  boost::format("PLL Frequency tune error %f [Hz]...") % (rtlsdr_source_->get_center_freq()-freq_) ;
+
+            // 4. set rx gain
+            if (this->AGC_enabled_==true)
+            {
+            	rtlsdr_source_->set_gain_mode(true);
+            	std::cout << "AGC enabled"<< std::endl;
+            	DLOG(INFO)<< "AGC enabled"<< std::endl;
+            }else{
+            	rtlsdr_source_->set_gain_mode(false);
+                rtlsdr_source_->set_gain(gain_);
+                std::cout << boost::format("Actual RX Gain: %f dB...") % rtlsdr_source_->get_gain() << std::endl;
+                DLOG(INFO) << boost::format("Actual RX Gain: %f dB...") % rtlsdr_source_->get_gain() << std::endl;
+            }
+        }
+    else
+        {
+            LOG_AT_LEVEL(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_make_file_sink(item_size_, dump_filename_.c_str());
+            DLOG(INFO) << "file_sink(" << file_sink_->unique_id() << ")";
+        }
+
+}
+
+RtlsdrSignalSource::~RtlsdrSignalSource()
+{
+}
+
+void RtlsdrSignalSource::connect(gr_top_block_sptr top_block)
+{
+
+    if (samples_ != 0)
+        {
+            top_block->connect(rtlsdr_source_, 0, valve_, 0);
+            DLOG(INFO) << "connected rtlsdr 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(rtlsdr_source_, 0, file_sink_, 0);
+                    DLOG(INFO) << "connected rtlsdr source to file sink";
+                }
+        }
+}
+
+void RtlsdrSignalSource::disconnect(gr_top_block_sptr top_block)
+{
+
+    if (samples_ != 0)
+        {
+            top_block->disconnect(rtlsdr_source_, 0, valve_, 0);
+
+            if (dump_)
+                {
+                    top_block->disconnect(valve_, 0, file_sink_, 0);
+                }
+        }
+    else
+        {
+            if (dump_)
+                {
+                    top_block->disconnect(rtlsdr_source_, 0, file_sink_, 0);
+                }
+        }
+}
+
+gr_basic_block_sptr RtlsdrSignalSource::get_left_block()
+{
+    LOG_AT_LEVEL(WARNING) << "Trying to get signal source left block.";
+    return gr_basic_block_sptr();
+}
+
+gr_basic_block_sptr RtlsdrSignalSource::get_right_block()
+{
+    if (samples_ != 0)
+        {
+            return valve_;
+        }
+    else
+        {
+            return rtlsdr_source_;
+        }
+}

src/algorithms/signal_source/adapters/rtlsdr_signal_source.h

@@ -0,0 +1,101 @@
+/*!
+ * \file rtlsdr_signal_source.h
+ * \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) 2010-2012  (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 <http://www.gnu.org/licenses/>.
+ *
+ * -------------------------------------------------------------------------
+ */
+
+#ifndef GNSS_SDR_RTLSDR_SIGNAL_SOURCE_H_
+#define GNSS_SDR_RTLSDR_SIGNAL_SOURCE_H_
+
+#include <boost/shared_ptr.hpp>
+#include <osmosdr/osmosdr_source_c.h>
+#include <gnuradio/gr_hier_block2.h>
+#include <gnuradio/gr_msg_queue.h>
+#include "gnss_block_interface.h"
+
+class ConfigurationInterface;
+
+/*!
+ * \brief This class reads samples from Realtek RTL2832U USB dongle DVB-T receiver (see http://sdr.osmocom.org/trac/wiki/rtl-sdr)
+ */
+class RtlsdrSignalSource: public GNSSBlockInterface
+{
+
+public:
+	RtlsdrSignalSource(ConfigurationInterface* configuration,
+            std::string role, unsigned int in_stream,
+            unsigned int out_stream, gr_msg_queue_sptr queue);
+
+    virtual ~RtlsdrSignalSource();
+
+    std::string role()
+    {
+        return role_;
+    }
+    std::string implementation()
+    {
+        return "Rtlsdr_Signal_Source";
+    }
+    size_t item_size()
+    {
+        return item_size_;
+    }
+
+    void connect(gr_top_block_sptr top_block);
+    void disconnect(gr_top_block_sptr top_block);
+    gr_basic_block_sptr get_left_block();
+    gr_basic_block_sptr get_right_block();
+
+private:
+
+    std::string role_;
+
+    // UHD SETTINGS
+    bool AGC_enabled_;
+    double sample_rate_;
+
+    unsigned int in_stream_;
+    unsigned int out_stream_;
+
+    double freq_;
+    double gain_;
+
+    std::string item_type_;
+    size_t item_size_;
+    long samples_;
+    bool dump_;
+    std::string dump_filename_;
+
+    boost::shared_ptr<osmosdr_source_c> rtlsdr_source_;
+
+    gr_block_sptr valve_;
+    gr_block_sptr file_sink_;
+    gr_msg_queue_sptr queue_;
+};
+
+#endif /*GNSS_SDR_RTLSDR_SIGNAL_SOURCE_H_*/