/*
 * Exp32.c
 *
 * Created: 10/23/2017 5:35:00 PM
 *  Author: ASUS
 */


/*
 * experiment03.c
 *
 * Created: 10/21/2017 9:35:09 PM
 *  Author: Rifat Rahman
 */
#define F_CPU 1000000UL

#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>

volatile char c;

ISR(INT2_vect)
{
	cli();
	c++;

	_delay_ms(500);
	if(c>15) c=0;
	c = c & 0x0f;
	GIFR = 0xFF;

}

ISR(INT0_vect)
{
	cli();
	c--;

	_delay_ms(500);
	if(c<0) c=15;
	c = c & 0x0f;
	GIFR = 0xFF;
}

int main(void)
{
			c = 0x00;
			DDRA = 0xff;
			GICR = (1 << INT0) | (1 << INT2);
			MCUCR = MCUCR | 0x2;
			MCUCSR = MCUCSR | 0xdf;
			sei();

    while(1)
    {
        //TODO:: Please write your application code
		PORTA = c;

    }
}