Merge branch 'rm_python_ext' into cmake_builds

Conflicts:
	CMakeLists.txt

1 files changed, 114 insertions, 0 deletions

diff --git a/gr-fcd/examples/c++/fcd_nfm_rx.cc b/gr-fcd/examples/c++/fcd_nfm_rx.cc
new file mode 100644
index 000000000..97ef7cf19
--- /dev/null
+++ b/gr-fcd/examples/c++/fcd_nfm_rx.cc
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2011 Free Software Foundation, Inc.
+ * 
+ * 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.
+ */
+
+/*
+ * Simple GNU Radio C++ example for using the Funcube Dongle.
+ * 
+ * Construct a simple narrow band FM receiver using the gr-fcd
+ * block as source.
+ * 
+ * This example uses "hw:1" as FCD source device and the default
+ * audio device for output.
+ *
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+// Include header files for each block used in flowgraph
+#include <gr_top_block.h>
+#include <gr_firdes.h>
+#include <gr_fir_filter_ccf.h>
+#include <gr_quadrature_demod_cf.h>
+#include <gr_audio_sink.h>
+#include <fcd_source_c.h>
+
+// other includes
+#include <iostream>
+#include <boost/program_options.hpp>
+
+
+namespace po = boost::program_options;
+
+int main(int argc, char **argv)
+{
+    int rate = 48000;		// Audio card sample rate
+    float pi = 3.141592654;
+
+
+    //variables to be set by po
+    std::string device;
+    int freq;
+    float gain;
+
+    //setup the program options
+    po::options_description desc("Command line options");
+    desc.add_options()
+        ("help", "This help message")
+        ("device", po::value<std::string>(&device)->default_value("hw:1"), "Audio input device")
+        ("freq", po::value<int>(&freq)->default_value(145500), "RF frequency in kHz")
+        ("gain", po::value<float>(&gain)->default_value(20.0), "LNA gain in dB")
+    ;
+    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 << "Narrow band FM receiver example" << std::endl << desc << std::endl;
+        return ~0;
+    }
+
+
+    // Construct a top block that will contain flowgraph blocks.
+    gr_top_block_sptr tb = gr_make_top_block("fcd_nfm_rx");
+
+    // FCD source
+    fcd_source_c_sptr fcd = fcd_make_source_c(device);
+    fcd->set_freq_khz(freq);
+    fcd->set_lna_gain(gain);
+    
+    // Low pass filter
+    std::vector<float> taps = gr_firdes::low_pass(1.0, 96000, 5000.0, 1000.0);
+    gr_fir_filter_ccf_sptr filter = gr_make_fir_filter_ccf (2, taps);
+
+    // FM demodulator
+    // gain = sample_rate / (2*pi*max_dev)
+    gr_quadrature_demod_cf_sptr demod = gr_make_quadrature_demod_cf (rate/(2.0*pi*5000.0));
+
+    // Audio sink
+    audio_sink::sptr sink = audio_make_sink(rate);
+
+    // Connect blocks
+    tb->connect(fcd, 0, filter, 0);
+    tb->connect(filter, 0, demod, 0);
+    tb->connect(demod, 0, sink, 0);
+
+    // Tell GNU Radio runtime to start flowgraph threads; the foreground thread
+    // will block until either flowgraph exits (this example doesn't) or the
+    // application receives SIGINT (e.g., user hits CTRL-C).
+    //
+    // Real applications may use tb->start() which returns, allowing the foreground
+    // thread to proceed, then later use tb->stop(), followed by tb->wait(), to cleanup
+    // GNU Radio before exiting.
+    tb->run();
+
+    // Exit normally.
+    return 0;
+}