eeprom_extern.c

AVR Devolpment Board

#include "avr/io.h"
#include "util/delay.h"

#define EEPROM_BUS_ADDRESS 0xA0


unsigned char EEPROM_Read(unsigned int address)
{
	unsigned char data;
	I2C_Start();
	I2C_Write(EEPROM_BUS_ADDRESS);
	I2C_Write(address>>8);
	I2C_Write(address);
	I2C_Start();
	I2C_Write(EEPROM_BUS_ADDRESS|1);
	data=I2C_Read(0);
	I2C_Stop();
	return data;
}

void EEPROM_Write(unsigned int address,unsigned char data)
{
	I2C_Start();
	I2C_Write(EEPROM_BUS_ADDRESS);
	I2C_Write(address>>8);
	I2C_Write(address);
	I2C_Write(data);
	I2C_Stop();
	_delay_ms(10);
}