#include<reg52.h>
#include<stdio.h>
#include<intrins.h>
sbit Sred_Egeeen=P1^1; 
sbit Syellow_Eyellow=P1^2;
sbit Sgreen_Ered=P1^3;//定義南北、東西向端口
void delay(unsigned char k);//函數(shù)聲明
unsigned char count;//定義全局變量
void time0_int(void) interrupt 1
  {
    count=count+1;
				 }

void main(void)
{ 
  TMOD=0X00;//工作方式0 8.192ms
  TH0=0X00;
  TL0=0X00;
  EA=1;
  ET0=1;
  TR0=1;
  while(1)
  {
    count=0;
    Sred_Egeeen=0;
	 Syellow_Eyellow=1;
	 Sgreen_Ered=1;
    do{;}
	 while(count<=250);//南北紅燈，東西綠燈
	 Sred_Egeeen=1;
	 Syellow_Eyellow=0;
	 Sgreen_Ered=1;
	 count=0;
	 do{;}
    while(count<=40);//黃燈切換
    Sred_Egeeen=1;
	 Syellow_Eyellow=1;
	 Sgreen_Ered=0;
	 count=0;
	 do{;}
    while(count<=250);//南北綠燈，東西紅燈*/
	 power=1;
	 }
	}