#include <atmel_start.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <usart_basic.h>


ISR(TIMER1_COMPA_vect)
{
	PORTD ^= 0xff;					// Interrupt 반전신호 통해 LED 점멸
}

int main(void)
{
	atmel_start_init();
	DDRD = 0x0c;					// 포트지정

	TCCR1A = 0x00;
	TCCR1B = (1<<WGM12)|(1<<CS11)|(1<<CS10);		// 64분주 지정(prescaler)
	TCCR1C = 0x00;
	OCR1AH = (62499 >>8);
	OCR1AL = 62499 & 0xff;
	TIMSK1 = (1<<OCIE1A);

	sei();


	while (1);
}