/********************************************************************************
                                Includes
********************************************************************************/
#include <avr/io.h>
#include <stdbool.h>
#include <avr/interrupt.h>

/********************************************************************************
                                Interrupt Routines
********************************************************************************/
// timer1 overflw
ISR(TIMER1_OVF_vect)
{
	// XOR PORTA with 0x02 to toggle the LSB
	PORTA=PORTA ^ 0x02;
}

// timer0 overflow
ISR(TIMER0_OVF_vect)
{
	// XOR PORTA with 0x01 to toggle the second bit up
	PORTA=PORTA ^ 0x01;
}

/********************************************************************************
                                Main
********************************************************************************/
int main( void )
{
	// Configure PORTA as output
	DDRA = 0xFF;
	PORTA = 0xFF;

	// enable timer overflow interrupt for both Timer0 and Timer1
	TIMSK=(1<<TOIE0) | (1<<TOIE1);
	
	// set timer0 counter initial value to 0
	TCNT0=0x00;

	// start timer0 with /1024 prescaler
	TCCR0 = (1<<CS02) | (1<<CS00);

	// lets turn on 16 bit timer1 also with /1024
	TCCR1B |= (1 << CS10) | (1 << CS12);
	
	// enable interrupts
	sei(); 


	while(true) {
	}
}