bladerf: add support for nuand LLC bladeRF (WIP)

This is based on the original work (https://github.com/Nuand/gr-osmosdr)
done by folks at nuand LLC for the gr3.6 branch of gr-osmosdr.

The following modifications have been done in this commit:

* port to gr-osmosdr master codebase (gr3.7)
* moved shared properties to bladerf_common
* added & verified IF filter bandwidth setters
* set LMS6002D registers with values taken from FAQ 5.27
* print device information (serial/versions) on startup
* added fpga= and fw= device arguments to program MCU/FPGA
* added bladerf=# dev. arg. to select a specific bladeRF
* grc gain field controls RF path VGA for RX/TX
* grc BB gain field controls BB path VGA for RX/TX

Usage example:

osmocom_fft -a "bladerf,fpga=/tmp/hostedx115.rbf"

The following RX named gain stages are available:

LNA: 0 to 6 dB, in 3dB steps
VGA1: 5 to 30 dB, in 1dB steps; nonlinear mapping done inside the lib
VGA2: 0 to 60 dB, in 3dB steps; not recommended to be used above 30dB

The following TX named gain stages are available:

VGA1: -35 to -4 dB, in 1dB steps, BB side
VGA2: 0 to 25 dB, in 1dB steps, RF side

Thanks a lot to the team of nuand LLC for this major contribution.

1 files changed, 120 insertions, 0 deletions

diff --git a/lib/bladerf/bladerf_sink_c.h b/lib/bladerf/bladerf_sink_c.h
new file mode 100644
index 0000000..8db1a8e
--- /dev/null
+++ b/lib/bladerf/bladerf_sink_c.h
@@ -0,0 +1,120 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2013 Nuand LLC
+ * Copyright 2013 Dimitri Stolnikov <horiz0n@gmx.net>
+ *
+ * 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.
+ */
+#ifndef INCLUDED_BLADERF_SINK_C_H
+#define INCLUDED_BLADERF_SINK_C_H
+
+#include <gnuradio/thread/thread.h>
+#include <gnuradio/block.h>
+#include <gnuradio/sync_block.h>
+
+#include <libbladeRF.h>
+
+#include "osmosdr/ranges.h"
+#include "sink_iface.h"
+#include "bladerf_common.h"
+
+class bladerf_sink_c;
+
+/*
+ * We use boost::shared_ptr's instead of raw pointers for all access
+ * to gr_blocks (and many other data structures).  The shared_ptr gets
+ * us transparent reference counting, which greatly simplifies storage
+ * management issues.  This is especially helpful in our hybrid
+ * C++ / Python system.
+ *
+ * See http://www.boost.org/libs/smart_ptr/smart_ptr.htm
+ *
+ * As a convention, the _sptr suffix indicates a boost::shared_ptr
+ */
+typedef boost::shared_ptr<bladerf_sink_c> bladerf_sink_c_sptr;
+
+/*!
+ * \brief Return a shared_ptr to a new instance of bladerf_sink_c.
+ *
+ * To avoid accidental use of raw pointers, bladerf_sink_c's
+ * constructor is private.  make_bladerf_sink_c is the public
+ * interface for creating new instances.
+ */
+bladerf_sink_c_sptr make_bladerf_sink_c (const std::string & args = "");
+
+class bladerf_sink_c :
+    public gr::sync_block,
+    public sink_iface,
+    protected bladerf_common
+{
+private:
+  // The friend declaration allows bladerf_make_sink_c to
+  // access the private constructor.
+  friend bladerf_sink_c_sptr make_bladerf_sink_c (const std::string & args);
+
+  bladerf_sink_c (const std::string & args);  	// private constructor
+
+public:
+  ~bladerf_sink_c (); 	// public destructor
+
+  int work( int noutput_items,
+            gr_vector_const_void_star &input_items,
+            gr_vector_void_star &output_items );
+
+  static std::vector< std::string > get_devices();
+
+  size_t get_num_channels( void );
+
+  osmosdr::meta_range_t get_sample_rates( void );
+  double set_sample_rate( double rate );
+  double get_sample_rate( void );
+
+  osmosdr::freq_range_t get_freq_range( size_t chan = 0 );
+  double set_center_freq( double freq, size_t chan = 0 );
+  double get_center_freq( size_t chan = 0 );
+  double set_freq_corr( double ppm, size_t chan = 0 );
+  double get_freq_corr( size_t chan = 0 );
+
+  std::vector<std::string> get_gain_names( size_t chan = 0 );
+  osmosdr::gain_range_t get_gain_range( size_t chan = 0 );
+  osmosdr::gain_range_t get_gain_range( const std::string & name, size_t chan = 0 );
+  bool set_gain_mode( bool automatic, size_t chan = 0 );
+  bool get_gain_mode( size_t chan = 0 );
+  double set_gain( double gain, size_t chan = 0 );
+  double set_gain( double gain, const std::string & name, size_t chan = 0 );
+  double get_gain( size_t chan = 0 );
+  double get_gain( const std::string & name, size_t chan = 0 );
+
+  double set_bb_gain( double gain, size_t chan = 0 );
+
+  std::vector< std::string > get_antennas( size_t chan = 0 );
+  std::string set_antenna( const std::string & antenna, size_t chan = 0 );
+  std::string get_antenna( size_t chan = 0 );
+
+  double set_bandwidth( double bandwidth, size_t chan = 0 );
+  double get_bandwidth( size_t chan = 0 );
+  osmosdr::freq_range_t get_bandwidth_range( size_t chan = 0 );
+
+private:
+  static void write_task_dispatch(bladerf_sink_c *obj);
+  void write_task();
+
+  gr::thread::thread thread;
+  osmosdr::gain_range_t vga1_range;
+  osmosdr::gain_range_t vga2_range;
+};
+
+#endif /* INCLUDED_BLADERF_SINK_C_H */