GNU Radio 3.6.1 C++ API
i2c_bitbang.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2001,2004 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
7  * GNU Radio is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 3, or (at your option)
10  * any later version.
11  *
12  * GNU Radio is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with GNU Radio; see the file COPYING. If not, write to
19  * the Free Software Foundation, Inc., 51 Franklin Street,
20  * Boston, MA 02110-1301, USA.
21  */
22 
23 #ifndef INCLUDED_I2C_BITBANG_H
24 #define INCLUDED_I2C_BITBANG_H
25 
26 #include <gr_core_api.h>
27 #include <i2c.h>
28 #include <i2c_bbio.h>
29 
30 /*!
31  * \brief class for controlling i2c bus
32  * \ingroup base
33  */
34 class GR_CORE_API i2c_bitbang : public i2c {
37 
38  public:
40 
41  //! \returns true iff successful
42  bool write (int addr, const unsigned char *buf, int nbytes);
43 
44  //! \returns number of bytes read or -1 if error
45  int read (int addr, unsigned char *buf, int max_bytes);
46 
47 
48 private:
49  void start ();
50  void stop ();
51  void write_bit (bool bit);
52  bool write_byte (char byte);
53 
54  void set_sda (bool bit) { d_io->set_sda (bit); }
55  void set_scl (bool bit) { d_io->set_scl (bit); }
56  bool get_sda () { return d_io->get_sda (); }
57 
58  i2c_bbio_sptr d_io;
59 };
60 
62 
63 #endif /* INCLUDED_I2C_BITBANG_H */
64 
65