rfspace: add support for RFSPACE SDR-IQ and SDR-IP

Usage example:

osmocom_fft -a sdr-iq=/dev/ttyUSB0
osmocom_fft -a sdr-ip=host[:port]
osmocom_fft -a netsdr=host[:port][,nchan=2]

The following named gain stages are available:

SDR-IQ: ATT: -20 to +10 dB, in 10dB steps
SDR-IP: ATT: -30 to 0 dB, in 10dB steps

The ftdi_sio driver is being used for SDR-IQ. It creates a character
device of the form:

crw-rw---- 1 root dialout 188, 0 Dec 19 22:14 /dev/ttyUSB0

To be able to open the device without root permissions add yourself to
the "dialout" group or do a "chmod 666 /dev/ttyUSB0" after pluggin in.

1 files changed, 174 insertions, 0 deletions

diff --git a/lib/rfspace/rfspace_source_c.h b/lib/rfspace/rfspace_source_c.h
new file mode 100644
index 0000000..51b1449
--- /dev/null
+++ b/lib/rfspace/rfspace_source_c.h
@@ -0,0 +1,174 @@
+/* -*- c++ -*- */
+/*
+ * 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_RFSPACE_SOURCE_C_H
+#define INCLUDED_RFSPACE_SOURCE_C_H
+
+//#define USE_ASIO
+
+#ifdef USE_ASIO
+#include <boost/asio.hpp>
+#endif
+#include <gnuradio/thread/thread.h>
+#include <gnuradio/block.h>
+#include <gnuradio/sync_block.h>
+
+#include <boost/circular_buffer.hpp>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/condition_variable.hpp>
+
+#include "osmosdr/ranges.h"
+#include "source_iface.h"
+#ifdef USE_ASIO
+using boost::asio::ip::tcp;
+using boost::asio::ip::udp;
+#endif
+class rfspace_source_c;
+
+#ifndef SOCKET
+#define SOCKET int
+#endif
+
+/*
+ * 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<rfspace_source_c> rfspace_source_c_sptr;
+
+/*!
+ * \brief Return a shared_ptr to a new instance of rfspace_source_c.
+ *
+ * To avoid accidental use of raw pointers, rfspace_source_c's
+ * constructor is private.  rfspace_make_source_c is the public
+ * interface for creating new instances.
+ */
+rfspace_source_c_sptr make_rfspace_source_c (const std::string & args = "");
+
+class rfspace_source_c :
+    public gr::sync_block,
+    public source_iface
+{
+private:
+  // The friend declaration allows rfspace_make_source_c to
+  // access the private constructor.
+  friend rfspace_source_c_sptr make_rfspace_source_c (const std::string & args);
+
+  rfspace_source_c (const std::string & args);  	// private constructor
+
+public:
+  ~rfspace_source_c ();	// public destructor
+
+  bool start();
+  bool stop();
+
+  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( bool fake = false );
+
+  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 );
+
+  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: /* functions */
+  void apply_channel( unsigned char *cmd, size_t chan = 0 );
+
+  bool transaction( const unsigned char *cmd, size_t size );
+
+  bool transaction( const unsigned char *cmd, size_t size,
+                    std::vector< unsigned char > &response );
+
+  void usb_read_task();
+
+private: /* members */
+  enum radio_type
+  {
+    RADIO_UNKNOWN = 0,
+    RFSPACE_SDR_IQ,
+    RFSPACE_SDR_IP,
+    RFSPACE_NETSDR
+  };
+
+  radio_type _radio;
+
+#ifdef USE_ASIO
+  boost::asio::io_service _io_service;
+  tcp::resolver _resolver;
+  tcp::socket _t;
+  udp::socket _u;
+#else
+  SOCKET _tcp;
+  SOCKET _udp;
+#endif
+  int _usb;
+  bool _running;
+  bool _keep_running;
+  uint16_t _sequence;
+
+  size_t _nchan;
+  double _sample_rate;
+  double _bandwidth;
+
+  gr::thread::thread _thread;
+  bool _run_usb_read_task;
+
+  boost::circular_buffer<gr_complex> *_fifo;
+  boost::mutex _fifo_lock;
+  boost::condition_variable _samp_avail;
+
+  std::vector< unsigned char > _resp;
+  boost::mutex _resp_lock;
+  boost::condition_variable _resp_avail;
+};
+
+#endif /* INCLUDED_RFSPACE_SOURCE_C_H */