基于51单片机的定时器程序

#include //包含头文件

#define uchar unsigned char

#define uint unsigned int //定义

unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,

0x6d,0x7d, 0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//数字编码sbit P07=P0^7; //位定义，使输出有效?

uchar temp,num,shi,ge;

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

} //延时

void init() //程序初始化

{

P07=0; //使输出有效

TMOD=0x01;

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

EA=1; //总中断开

TR0=1; //定时方式

ET0=1; //定时器开

}

void main()

{

init();

while(1);

}

void timer0() interrupt 1

{

uchar temp;

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

temp++;

if(temp==20) //每秒进一次中断

{

temp=0; //清0

num++; //数

P2=table[ge];

if(num==9)

{

num=0;

}

ge=num%10;

delay(100);

}

}