GNU Radio 2.x: i2c_bitbang.h Source File

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# i2c_bitbang.h

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    00001 /* -*- c++ -*- */
    00002 /*
    00003  * Copyright 2001,2004 Free Software Foundation, Inc.
    00004  *
    00005  * This file is part of GNU Radio
    00006  *
    00007  * GNU Radio is free software; you can redistribute it and/or modify
    00008  * it under the terms of the GNU General Public License as published by
    00009  * the Free Software Foundation; either version 2, or (at your option)
    00010  * any later version.
    00011  *
    00012  * GNU Radio is distributed in the hope that it will be useful,
    00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015  * GNU General Public License for more details.
    00016  *
    00017  * You should have received a copy of the GNU General Public License
    00018  * along with GNU Radio; see the file COPYING.  If not, write to
    00019  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00020  * Boston, MA 02111-1307, USA.
    00021  */
    00022
    00023 #ifndef INCLUDED_I2C_BITBANG_H
    00024 #define INCLUDED_I2C_BITBANG_H
    00025
    00026 #include <i2c.h>
    00027 #include <i2c_bbio.h>
    00028
    00032 class i2c_bitbang : public i2c {
    00033   friend i2c_sptr make_i2c_bitbang (i2c_bbio_sptr io);
    00034   i2c_bitbang (i2c_bbio_sptr io);
    00035
    00036  public:
    00037   ~i2c_bitbang () {}
    00038
    00040   bool write (int addr, const unsigned char *buf, int nbytes);
    00041
    00043   int read (int addr, unsigned char *buf, int max_bytes);
    00044
    00045
    00046 private:
    00047   void start ();
    00048   void stop ();
    00049   void write_bit (bool bit);
    00050   bool write_byte (char byte);
    00051
    00052   void set_sda (bool bit) { d_io->set_sda (bit); }
    00053   void set_scl (bool bit) { d_io->set_scl (bit); }
    00054   bool get_sda () { return d_io->get_sda (); }
    00055
    00056   i2c_bbio_sptr         d_io;
    00057 };
    00058
    00059 i2c_sptr make_i2c_bitbang (i2c_bbio_sptr io);
    00060
    00061 #endif /* INCLUDED_I2C_BITBANG_H */
    00062
    00063