text: /**************************************************************************/
  /*! 
      @file     mcp24aa.h
      @author   K. Townsend (microBuilder.eu)
      @date     22 March 2010
      @version  0.10
  
      @section LICENSE
  
      Software License Agreement (BSD License)
  
      Copyright (c) 2010, microBuilder SARL
      All rights reserved.
  
      Redistribution and use in source and binary forms, with or without
      modification, are permitted provided that the following conditions are met:
      1. Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
      2. Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
      3. Neither the name of the copyright holders nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.
  
      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
      EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
      WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
      DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
      DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
      (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
      LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
      ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
      SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
  /**************************************************************************/
  
  #ifndef _MCP24AA_H_
  #define _MCP24AA_H_
  
  #include "projectconfig.h"
  
  #define MCP24AA_ADDR    0xA0          // 10100000
  #define MCP24AA_RW      0x01
  #define MCP24AA_READBIT 0x01
  #define MCP24AA_MAXADDR 0xFFF         // 4K = 4096
  
  typedef enum
  {
    MCP24AA_ERROR_OK = 0,               // Everything executed normally
    MCP24AA_ERROR_I2CINIT,              // Unable to initialise I2C
    MCP24AA_ERROR_I2CBUSY,              // I2C already in use
    MCP24AA_ERROR_ADDRERR,              // Address out of range
    MCP24AA_ERROR_BUFFEROVERFLOW,       // Max 8 bytes can be read/written in one operation
    MCP24AA_ERROR_LAST
  }
  mcp24aaError_e;
  
  mcp24aaError_e mcp24aaInit (void);
  mcp24aaError_e mcp24aaReadBuffer (uint16_t address, uint8_t *buffer, uint32_t bufferLength);
  mcp24aaError_e mcp24aaWriteBuffer (uint16_t address, uint8_t *buffer, uint32_t bufferLength);
  mcp24aaError_e mcp24aaReadByte (uint16_t address, uint8_t *buffer);
  mcp24aaError_e mcp24aaWriteByte (uint16_t address, uint8_t value);
  
  
  #endif
  