timer0isr.c

Hitech microchip PIC C18 Compiler

#include <pic18.h>
#include "timer0.h"
#include <stdio.h>

void interrupt ISR(void)
{
    if((RBIE)&&(RBIF))
    {
        /*turn timer on and off*/
        if(TIMER_ENA)   {TMR0ON=!TMR0ON;
                                    TMR1ON=!TMR1ON;}
        
        /*turn prescaler on and off*/
        if (PRESCALER_ENA) PSA=!PSA;

        /*select timer mode (counter/timer)*/
        if (COUNTER_SEL) T0CS=!T0CS; 

        /*select timer mode (8/16 bits)*/
        if (TIMER_SIZE) T08BIT=!T08BIT;

        RBIF=0;
        UPDATE_REQUIRED=1;
    }

    if((TMR0IF)&&(TMR0IE))
    {
        /*shift value in LED1 to the right by 1*/
        LED1<<=1;
        if (LED1==0)LED1=DIP1;
        TMR0IF=0;
    }
    if((TMR1IF)&&(TMR1IE))
    {
        /*shift value in LED2 to the right by 1*/
        LED2<<=1;
        if (LED2==0) LED2=DIP1;
        TMR1IF=0;
    }   
}