firmware/target/arm/tcc77x/i2c-target.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Rob Purchase
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #ifndef I2C_TARGET_H
  22 #define I2C_TARGET_H
  23
  24 /* Definitions for the TCC77X I2C bus */
  25
  26 #define SDA_BIT (1<<10)
  27 #define SCL_BIT (1<<11)
  28
  29 #define SCL    (GPIOB & SCL_BIT)
  30 #define SCL_HI GPIOB |= SCL_BIT
  31 #define SCL_LO GPIOB &= ~SCL_BIT
  32
  33 #define SDA        (GPIOB & SDA_BIT)
  34 #define SDA_HI     GPIOB |= SDA_BIT
  35 #define SDA_LO     GPIOB &= ~SDA_BIT
  36 #define SDA_INPUT  GPIOB_DIR &= ~SDA_BIT
  37 #define SDA_OUTPUT GPIOB_DIR |= SDA_BIT
  38
  39 #endif /* I2C_TARGET_H */