#ifndef _I2C_H
#define _I2C_H

#include "config_wrapper.h"

#ifdef I2C

// Uncomment if we act as master device.
#define I2C_MASTER_MODE
// Uncomment if we act as slave device.
//#define I2C_SLAVE_MODE
// Uncomment if we use EEPROM chips.
//#define I2C_EEPROM_SUPPORT

// Bus speed. Maximum is said to be 400000.
#define I2C_BITRATE                 100000
// Comment out if there are external pullups.
#define I2C_ENABLE_PULLUPS

#define I2C_BUFFER_SIZE             4

#ifdef I2C_SLAVE_MODE
  #define I2C_SLAVE_RX_BUFFER_SIZE  1
  #define I2C_SLAVE_TX_BUFFER_SIZE  1
#endif /* I2C_SLAVE_MODE */

#ifdef I2C_EEPROM_SUPPORT
  // Depends on EEPROM type, usually it is 1 or 2 bytes.
  #define I2C_PAGE_ADDRESS_SIZE     2
#endif /* I2C_EEPROM_SUPPORT */


void i2c_init(uint8_t address);
void i2c_send(uint8_t address, uint8_t* block, uint8_t tx_len);

#endif /* I2C */

#endif /* _I2C_H */