i2c_bitbang.h

/* 
 * File:   i2c_bitbang.h
 * Author: Steffi
 *
 * Created on 23. April 2016, 09:50
 */

#ifndef I2C_BITBANG_H
#define	I2C_BITBANG_H

#ifdef	__cplusplus
extern "C" {
#endif
  
#include "DevelOS.h"

#define I2C_Buffer  64

#pragma udata I2C_Data
extern struct I2C_BUS {
    unsigned char Buffer[I2C_Buffer];   // have a few bytes as buffer
    unsigned char BufPos;               // as a counter
    unsigned long Delay;                // for the timing of the bus
} i2c_bus;
#pragma udata

unsigned char I2C_ByteIn(char ack);     // Read a byte from the bus, maybe ack it, return the byte
unsigned char I2C_ByteOut(char byte);   // Write a byte to the bus, return the ack
void I2C_Start(void);                   // do the start condition
void I2C_Stop(void);                    // do the stop condition

#define I2C_Delay_100khz    5000

#ifdef	__cplusplus
}
#endif

#endif	/* I2C_BITBANG_H */