#include "application.h"
#include <avr/interrupt.h>

// We use the global volatile register!
// gVolReg.time_sec and 

void timer_init() {
    // TIMER2 is used as local clock:
    // configure timer 2
    TCCR2 = (1<<WGM21); // CTC Modus
    TCCR2 |= (1<<CS21) | (1<<CS20); // Prescaler 64 --> counts up every 8us
    OCR2 = 125-1; 					// --> output compare interrupt occurs every 125 x 8us = 1ms
    // Compare Interrupt erlauben
    TIMSK |= (1<<OCIE2);
}

ISR (TIMER2_COMP_vect) {
    if (gVolReg.time_ms < 999)
        ++gVolReg.time_ms;
    else {
        gVolReg.time_ms = 0;
        gVolReg.time_sec++;
    }
}