timer2isr.c

来自「picc_18v 8.35pl35 PIC18系列单片机开发C编译器」· C语言 代码 · 共 42 行

#include <pic18.h>
#include "timer2.h"
#include <stdio.h>

void interrupt ISR(void)
{
	if((RBIE)&&(RBIF))
	{
		TMR2IE=0;															/*Disable the TIMER0 interrupt */

		if(TIMER_ENA)														/*Turn timers on and off*/
		{
			TMR0ON=!TMR0ON;
			TMR2ON=!TMR2ON;
		}
		if(TIMER_UPDATE)	
		{
			T2CON=T2CON&0b00000100;
			T2CON=T2CON|(PORTE&0b11111011);			/*Update prescalar and postscalar settings for TIMER2*/
			PR2=PORTD;													/*Update value of period register for TIMER2*/
		}
		RBIF=0;
		UPDATE_REQUIRED=1;
	}


	if((TMR0IF)&&(TMR0IE))
	{
		/*shift value in LED2 to the right by 1*/
		LED2<<=1;
		if (LED2==0) LED2=1;
		TMR0IF=0;
	}
	if((TMR2IF)&&(TMR2IE))
	{
		/*shift value in LED1 to the right by 1*/
		LED1<<=1;
		if (LED1==0) LED1=1;
		TMR2IF=0;
	}	
}