单片机STC89C52RC定时器

作者：小丑西瓜9 | 2024-05-28 16:10:34

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stc89c52rc定时器

STC89C52RC定时器：方法1

#include"reg52.h"
unsigned int count=0;
sbit fm=P2^3;
sbit led = P1^0;

void main()
{

led = 1;
    TMOD = 0X20;
   TH1 = 256-200;
   TL1 = 256-200;
   //中断
   EA = 1;
   ET1=1;
   //定时器启动
   TR1 = 1;

while(1)
{
if(--count == 2500)
{
count=0;
led = ~led;
}
}

}
void timer0() interrupt 3
{
//delay(500);
count++;
}

STC89C52RC定时器：方法二

#include"reg52.h"
unsigned int count=0;
sbit fm=P2^3;
sbit led = P1^0;
//————————————————————————————————————
//void delay(unsigned int xms)
//{
//   unsigned int i,j;
//   for(i=xms;i>0;i--)
//       for(j=112;j>0;j--);
//}
//————————————————————————————————————
void main()
{

led = 1;
    TMOD = 0X10;
   TH1 = (65535-50000)/256;
   TL1 = (65535-50000)%256;
   //中断
   EA = 1;
   ET1=1;
   //定时器启动
   TR1 = 1;

while(1)
{
if(--count == 200)
{
count=0;
led = ~led;
}
}

}
void timer0() interrupt 3
{
//delay(500);
TH1 = (65535-50000)/256;
TL1 = (65535-50000)%256;
count++;
}

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