#include <reg51.h>
sbit ALE = P2^4;    
sbit OE = P2^5;    
sbit SC = P2^6;    
sbit EOC = P2^7;    
sbit ADDR_A = P2^0;    
sbit ADDR_B = P2^1;    
sbit ADDR_C = P2^2;    
sfr  MYDATA = P1;
void main()
  {
    unsigned char value;
    MYDATA = 0xFF; 	
    EOC = 1;          	
    ALE = 0;         	
    OE = 0;          	
    SC = 0;           	
    while(1)  
      {
        ADDR_C = 0;   	
        ADDR_B = 0;   	
        ADDR_A = 1;    	
        MSDelay(1);   	
        ALE = 1;
        MSDelay(1);
        SC = 1;
        MSDelay(1);
        ALE = 0;
        SC = 0;       	
        while(EOC==1); 	
        while(EOC==0);
        OE = 1;        	
        MSDelay(1);
        value = MYDATA; 	
        OE = 0;      	
        ConvertAndDisplay(value);	
      }
  }