AD8008 realizes A/D conversion

 #include
 #include
 //#include
 sbit ST=P3^2;
 sbit EOC=P3^1;
 sbit OE=P3^0;
 sbit ADDA=P3 ^4;
 sbit ADDB=P3^5;
 sbit ADDC=P3^6;
 unsigned char a,b,c;
 unsigned char code dispbitcode[]={0x00,0x08,0x04,0x02,0x01};//shared negative bit code
 unsigned char code dispcode[]={ 0X3F,/*0*/
        0X06,/*1*/
        0X5B,/*2*/
        0X4F,/*3*/
        0X66,/*4*/
        0X6D,/*5*/
        0X7D,/*6*/
        0X07,/*7*/
        0X7F,/*8*/
        0X6F,/*9*/
};//Common cathode segment code
/*************Delay subroutine*** ****************************/
 void delay(unsigned int x) //minimum 1 millisecond
{
 unsigned char j;
 while(x- -)
 {
  for(j=0;j<125;j++)
  {;}
 }
}
/***************Display subroutine*********** ***********/
void display(unsigned char bai,unsigned char shi,unsigned char ge)
{
  //P3=dispbitcode[5];
  //P2=dispcode[11]; 
  P2=dispbitcode[ 1];
  P0=dispcode[bai]; //Display hundreds digit
    delay(5);
  //P3=dispbitcode[5];
  //P2=dispcode[11]; 
  P2=dispbitcode[2];
  P0=dispcode[shi]; //display tens digit
    delay(5);
  //P3=dispbitcode[5];
  //P2=dispcode[11]; 
  P2=dispbitcode[3];
  P0=dispcode[ge]; / /Display the unit digit
    delay(5);
}
void main(void)
{
  unsigned char c;
  ADDA=0;
  ADDB=0;
  ADDC=0; //Select channel 0

  while(1)
  { 
   ST=0;
   ST=1; //Start AD conversion_nop_
   (); //The program performs no operation once, that is, delay;
   ST=0;      
   delay(1); // Delay and wait for the conversion to end
   OE =1; // Output the converted data
   
   c=P1; // Write down the obtained data
   OE = 0;
   a=c/100; //Send to display
   b=c%100/10;
   c=c%100%10;
   display(a,b,c);
  }
}