comparatorsisr.c

Hitech microchip PIC C18 Compiler

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

void interrupt ISR(void)
{
	if((RBIE)&&(RBIF))												/*Service PUSH button press*/
	{
		CMIE=0;															/*Disable comparator interrupts while changing CMCON to avoid  false interrupts*/
		CVRCON=0;														/*Clear Voltage reference control register*/
		CMCON=DIP1;													/*Update CMCON with new value*/
		if ((CMCON&07)==6)CVRCON=0b10100000|(PORTC&0x0F); /*if Voltage reference is used load VREF value*/
		RBIF=0;
		CMIE=1;															/*Enable comparator interrupts*/
		UPDATE_REQUIRED=1;
	}

	if((CMIF)&&(CMIE))												/*Service comparator interrupt*/
	{
		CMIF=0;
		UPDATE_REQUIRED=1;
	}	
}