基于51单片机红绿灯程序设计

#include<reg51.h> #define uchar unsigned char #define uint unsigned int sbit wa=P2^6; sbit wu=P2^7; uchar num=40,x,y,t=0,l=45,h=80; uchar code table[]={ 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71}; uchar code a[]={ 0x01,0x02,0x04}; void delay(int z) { for(x=z;z>0;z--) for(y=110;y>0;y--); } void main() { TMOD=1; TH0=(65536-50000)/256; TL0=(65536-50000)%256; EA=1; ET0=1; TR0=1; while(1) {if(num<=40&&num>0) { wa=1; wu=0; P1=table[num%10]; delay(5); wu=1 ; wa=0; P1=table[num/10]; delay(5); P3=a[0];} if(l<=5&&l>0) { wa=1; wu=0; P1=table[l%10]; delay(5); wu=1 ; wa=0; P1=table[l/10]; delay(5); P3=a[1]; } if(h<=35&&h>0) { wa=1; wu=0; P1=table[h%10]; delay(5); wu=1 ; wa=0; P1=table[h/10]; delay(5); P3=a[2]; } } } void time() interrupt 1 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; t++; if(t==20) { t=0; num--; l--; h--; if(h==0) num=40; if(num==0) l=5; if(l==0) h=35; } }