PIC单片机三个定时器中断同时定时

#include<pic.h>

#define uchar unsigned char

#define uint unsigned int

__CONFIG(0x3B31);

void init();

uint Timer0Num,Timer1Num,Timer2Num;//

void timer0();

void timer1();

void timer2();

void main()

{

init();

while(1)

{

if(Timer0Num>=20)

{

Timer0Num = 0;

RD0 = ~RD0;

}

if(Timer1Num >= 4)

{

Timer1Num = 0;

RD2 = !RD2;

}

if(Timer2Num >= 50)

{

Timer2Num = 0;

RD4 = !RD4;

}

}

}

void init(void)

{

TRISD = 0;

PORTD = 0;

OPTION = 0x07;//256分频

TMR0 = 56;

PIE1 |= 0x01 | 0x02;

TMR1H = (65536-50000)/256;

TMR1L = (65536-50000)%256;

T1CON = 0x21;//4分频

TMR2 = 0;

PR2 = 100;

T2CON = 0x1D;

INTCON = 0xE0;

}

void interrupt Ints()

{

if(T0IE&&T0IF) timer0();

if(TMR1IE&&TMR1IF) timer1();

if(TMR2IE&&TMR2IF) timer2();

}

void timer0()

{

T0IF = 0;

TMR0 = 56;

Timer0Num++;

}

void timer1()

{

TMR1IF = 0;

TMR1H = (65536-50000)/256;

TMR1L = (65536-50000)%256;

Timer1Num++;

}

void timer2()

{

TMR2IF = 0;

TMR2 = 0;

PR2 = 200;

Timer2Num++;

}