#ifndef I2C_H_QWERTY
#define I2C_H_QWERTY

#define PSC_I2C			1	  // I2C prescaler
#define F_I2C			400000UL  // I2C Clock

#include <stdio.h>
#include <avr/io.h>

extern uint8_t i2c_error;

#define I2C_ERR_START	        0 // Timeout start condition
#define I2C_ERR_WRITE	        1 // Timeout byte transmission
#define I2C_ERR_READACK	        2 // Timeout read acknowledge
#define I2C_ERR_READNACK	3 // Timeout read nacknowledge

void i2c_init(void);

void i2c_start(void);
void i2c_write(uint8_t byte);
uint8_t i2c_read_ack(void);
uint8_t i2c_read_nack(void);
void i2c_stop(void);

#endif