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/* -*- c++ -*- */
/*
* Copyright 2001,2004 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* 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 2, 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_I2C_BITBANG_H
#define INCLUDED_I2C_BITBANG_H
#include <i2c.h>
#include <i2c_bbio.h>
/*!
* \brief class for controlling i2c bus
*/
class i2c_bitbang : public i2c {
friend i2c_sptr make_i2c_bitbang (i2c_bbio_sptr io);
i2c_bitbang (i2c_bbio_sptr io);
public:
~i2c_bitbang () {}
//! \returns true iff successful
bool write (int addr, const unsigned char *buf, int nbytes);
//! \returns number of bytes read or -1 if error
int read (int addr, unsigned char *buf, int max_bytes);
private:
void start ();
void stop ();
void write_bit (bool bit);
bool write_byte (char byte);
void set_sda (bool bit) { d_io->set_sda (bit); }
void set_scl (bool bit) { d_io->set_scl (bit); }
bool get_sda () { return d_io->get_sda (); }
i2c_bbio_sptr d_io;
};
i2c_sptr make_i2c_bitbang (i2c_bbio_sptr io);
#endif /* INCLUDED_I2C_BITBANG_H */
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