Coolpales Comment maxEmbedded

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

volatile uint8_t count = 0;

void timer1_init ()
{
OCR1A = 57599;
TIMSK |= 16; //Output compare interrupt enable
TCCR1B |= (1<<CS12) | (1<<WGM12); //256x pre-scaler
sei(); //global interrupt enable
}

ISR (TIMER1_COMPA_vect)
{
if (count)
{
count = 0;
PORTB |= (1<<PB0);
OCR1A = 633;
}
else
{
count = 1;
PORTB &= ~(1<<PB0);
OCR1A = 518;
}
}

int main(void)
{
PORTB = 0b00;
DDRB |= (1<<PB0) | (1<<PB1);
timer1_init();

while(1);
}