#include <stdint.h>
#include <avr/io.h>
#include <avr/eeprom.h>

#define EEPROM_V1	0x0000	/* EEPROM uint16_t 0x0000-0x0001 2Byte */
#define EEPROM_V2	0x0002	/* EEPROM uint8_t 0x0002 1Byte */
#define EEPROM_V3	0x0003	/* EEPROM int16_t 0x0003-0x0004 2Byte */

int main( void )
{
	uint16_t value;

	/* EEPROM 読出し */
	eeprom_busy_wait();		/* 読み書き可能までwait */
	value = eeprom_read_word((uint16_t *)EEPROM_V1);	/* EEPROM_V1の読出し */

	/* EEPROM 書込み */
	eeprom_busy_wait();		/* 読み書き可能までwait */
	eeprom_write_word((uint16_t *)EEPROM_V1, 0xCCAA);	/* EEPROM_V1へ2byte書き込み */

	/* EEPROM 書込み */
	eeprom_busy_wait();		/* 読み書き可能までwait */
	eeprom_write_byte((uint8_t *)EEPROM_V2, 0xAA);		/* EEPROM_V2へ1byte書き込み */
}