#include <hidef.h>      	
#include <mc9s12dp512.h>     
#pragma LINK_INFO DERIVATIVE "mc9s12dp512"
void DELAY20uS(void);
void TDELAY(void);
int result;
void main(void) 
{
  DDRB = 0xFF;  				
  ATD0CTL2 = 0x80;  			
  DELAY20uS();   			
  ATD0CTL3 = 0x20;  			
  ATD0CTL4 = 0xE3;
  for(;;) 
   {
    ATD0CTL5 = 0x82; 			
    
    while(!(ATD0STAT0 & ATD0STAT0_SCF_MASK));
    result = ATD0DR0; 			
    result = result + ATD0DR1;  
    result = result + ATD0DR2;  
    result = result + ATD0DR3;  
    result = result / 4; 
    PORTAB = result; 
    TDELAY();
   } 
}
void DELAY20uS(void) 
 {
  int x = 40;
  while(x--);
 }
void TDELAY(void) 
 {
  int x = 0;
  while(--x);
  }