单片机60s定时器程序c语言

#include<reg52.h> #define uchar unsigned char #define uint unsigned int sbit duan=P2^6; sbit wei=P2^7; void init(); void delay(uint z); void display(); uchar count,b,c,d,numwei,numduan; uchar code tableduan[]={ 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71}; uchar code tablewei[]={ 0xfe,0xfd,0xfb,0xf7, 0xef,0xdf,0xbf,0x7f}; void sg() {b=d/10; c=d%10; } main() //主函数 { init(); while(1) { sg(); display(); } } void init() //初始化 { d=99; TMOD=0x01; TH0=(65535-50000)/256; TL0=(65535-50000)%256; EA=1; ET0=1; TR0=1; } void delay(uint z) //delay延时 { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } void time0() interrupt 0 //定时器中断 { TH0=(65535-5000)/256; TL0=(65535-5000)%256; count++; if(count==20) {d--;count=0; if(d==0) d=99; } } void display() { wei=1; P0=tablewei[2]; wei=0; duan=1; P0=tableduan[b]; duan=0; delay(10); wei=1; P0=tablewei[3]; wei=0; duan=1; P0=tableduan[c]; duan=0; delay(10); }