Question

如何利用定时器T0的工作方式1实现1秒钟延时程序(单片机)？

Answer 1

1、#include <reg52.h>

2、#define uchar unsigned char

3、#define uint unsigned int

4、sbit LED = P0^0;uchar T_Count = 0;void main(){TMOD = 0x01;TH0  = (65535-50000)/256;TL0  = (65535-50000)%256;IE   = 0x82;TR0  = 1;while(1);}

5、void LED_Flash() interrupt 1{TH0  = (65535-50000)/256;TL0  = (65535-50000)%256;if(++T_Count == 20){LED = !LED;T_Count = 0;}}

6、这个程序是1秒钟LED灯会亮与灭显示。

1单片机，拥有两个定时器，用来中断计数，分别是T0和T1。而52单片机和51单片机的定时器是一样的，只是52比51多了一个定时器/计数器T2，它们的设置都大同小异。

Answer 2

#include<reg51.h>
unsigned char i=0,j=0;
code unsigned char datab[8]=
{0x55,0x0AA,0x05,0x0A,0x50,0x0A0,0x0FF,0x0};
void t1int() interrupt 3
{
TR1=0;
TL1=0;
TH1=0x4C;
i++;
if(i==20)
{
i=0;
P1=datab[j];
j++;
if(j==7)
j=0;
}
TR1=1;
}
void main()
{
TMOD=0x10;
TL1=0;
TH1=0x4C;
TR1=1;
ET1=1;
EA=1;
while(1);
}