i2cDriver.h

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/* 
 * Copyright (C) 2013 Andreas Misje
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef I2CDRIVER_H
#define I2CDRIVER_H

#include <stdbool.h>
#include <stddef.h>

#define I2C_NO 1

#define I2C_TRX_BUFFER_SIZE 32

enum i2c_states
{
   I2C_STATE_idle,
   I2C_STATE_sendingStart,
   I2C_STATE_dataTX,
   I2C_STATE_sendingRestart,
   I2C_STATE_sendingStop,
   I2C_STATE_dataRX,
   I2C_STATE_ack,
   I2C_STATE_error,
   I2C_STATE_disabled,
};

extern volatile enum i2c_states i2c_state;

extern volatile bool i2c_stayInErrorState;

enum i2c_errors
{
   I2C_ERR_noError            =  0,
   I2C_ERR_internal           =  1,
   I2C_ERR_inErrorState       =  2,
   I2C_ERR_busy               =  3,
   I2C_ERR_TXBufferOverflow   =  4,
   I2C_ERR_RXBufferOverflow   =  5,
   I2C_ERR_slaveNACK          =  6,
   I2C_ERR_nothingReceived    =  7,
   I2C_ERR_collisionDetected  =  8,
   I2C_ERR_disabled           =  9,
};

extern volatile enum i2c_errors i2c_error;

void i2c_reset();

bool i2c_busy();

void i2c_init( int brg, bool enableSlewRateControl, int priority );

void i2c_disable();

void i2c_enable();

int i2c_putc( unsigned char address, unsigned char reg, unsigned char data );

int i2c_puts( unsigned char address, unsigned char reg, unsigned char *data,
      size_t len );

int i2c_getc( unsigned char address, unsigned char reg );

int i2c_gets( unsigned char address, unsigned char reg, size_t len );

int i2c_getData( unsigned char *data, size_t len );


#endif // I2CDRIVER_H