#include <avr/io.h>			//Library for all registernames of the ATMega 
                        	//example: PORTA, PB3, DDRB usw.
#include <stdint.h>			//Library for the variabletyps like:
							//uint8_t, int8_t, uint32_t, int32_t.
#include <avr/interrupt.h>  //Library for Interrupt functions.
#include "Frequency.h"
#include "Timer2Isr.h"

/*
** local variable
*/

static volatile uint16_t int0Flag=0;
static volatile uint16_t int1Flag=0;

static volatile uint32_t actDivisor=0;

static uint16_t actInt1Flag=0;

/*
** local functions
*/
/*************************************************************************
Occurs each 0.1275ms
*************************************************************************/
ISR (TIMER0_OVF_vect)	  
{	
	int0Flag++; //counts the timeroverflows of timer0 
	int1Flag++; 
	sei();
}

/*************************************************************************
Externel pin for the rev meter signal (PD2) --> signal is high activ
*************************************************************************/
ISR (INT0_vect)
{
	uint8_t tempTCNT0=TCNT0; 
	uint32_t tempInt0Flag=int0Flag;
	static uint8_t oldTempTCNT0=0;

	if(TIFR & (1<<TOV0))
	{
		tempInt0Flag++;
		tempTCNT0=TCNT0;
		TIFR|=(1<<TOV0);  	//TOV0 zurück setzen	
	}

	actDivisor=tempInt0Flag*0x100 + (tempTCNT0-oldTempTCNT0);
	int0Flag=0;		  	//clear t0Flag 	

	oldTempTCNT0=tempTCNT0;
	s[FREQ_TIMER0]=0;		//to indicate a missing clock source
}