timer1isr.c

Hitech microchip PIC C18 Compiler

#include <pic18.h>
#include "timer1.h"
#include <stdio.h>

void interrupt ISR(void)
{
	if((RBIE)&&(RBIF))
	{
		/*turn timers on and off*/
		if(TIMER_ENA)	{TMR1ON=!TMR1ON;
								 TMR3ON=!TMR3ON;}
		/*toggle between TIMER and COUNTER modes*/
		if(TIMER_MODE)	TMR1CS=1;
		else TMR1CS=0;

		RBIF=0;
		UPDATE_REQUIRED=1;
	}


	if((TMR1IF)&&(TMR1IE))
	{
		/*shift value in LED1 to the right by 1*/
		LED1<<=1;
		if (LED1==0) LED1=PORTD;
		TMR1IF=0;
	}
	if((TMR3IF)&&(TMR3IE))
	{
		/*shift value in LED2 to the right by 1*/
		LED2<<=1;
		if (LED2==0) LED2=PORTD;
		TMR3IF=0;
	}	
}