AVR EEPROM Library

libEEPROM.c

// Kenneth Finnegan, 2011 - GPLv2
// kennethfinnegan.blogspot.com

// Read a single byte from the given address
unsigned char EEPROM_read( unsigned int eeprom_addr ) {
	// Spin-lock until EEPROM finishes prev write
	while (EECR & (1<<EEPE)) ;
	// Setup address register
	EEAR = eeprom_addr;
	// Start read
	EECR |= (1<<EERE);
	// Finishes right away
	return EEDR;
}

// Write a single byte to the given address
// Duplicate checking, no error checking.
void EEPROM_write (unsigned int eeprom_addr, unsigned char eeprom_data) {
	// Save a needless write and spinlock on busy EEPROM
	if (eeprom_data == EEPROM_read(eeprom_addr))
		return;
	// Setup addr and data registers
	EEAR = eeprom_addr;
	EEDR = eeprom_data;
	// Enable EEPROM write
	EECR |= (1<<EEMPE);
	// Start EEPROM write
	EECR |= (1<<EEPE);
}

Thank You!!!:D