#include "reg52.h"
 typedef unsigned int u16;
 typedef unsigned int u8;
 
 sbit LSA=P2^2;
 sbit LSB=P2^3;
 sbit LSC=P2^4;
 unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07};
 void delay(u16 i){
 	 while(i--);
 }
 void everyItem(){
 		u8 i;
	 for (i=0;i<8;i++){
	 	P0=table[i];
		delay(12000);
	 }
 }
 void Led(){
 	 u8 i;
	 for (i=0;i<8;i++){
	
	 		
		 P0=0;//用于清除影响	 
	 	  switch(i){
		    case(0):
	 		  LSA=1;LSB=1;LSC=1;everyItem(); break;
			case(1):
			  LSA=0;LSB=1;LSC=1;everyItem(); break;
			case(2):
			  LSA=1;LSB=0;LSC=1;everyItem(); break;
			case(3):
		  	  LSA=0;LSB=0;LSC=1;everyItem(); break;
			case(4):
			  LSA=1;LSB=1;LSC=0;everyItem(); break;
			case(5):
		  	  LSA=0;LSB=1;LSC=0;everyItem(); break;
			case(6):
		  	  LSA=1;LSB=0;LSC=0;everyItem(); break;
			case(7):
			  LSA=0;LSB=0;LSC=0;everyItem(); break;
		  } 
		    
	 }
 
 }
 void main(){
 	   while(1){
	   	 Led();
	   }
 	   
 }