//Displaying ATD0 channel 5 (POT) on LEDs of PORTB in C Language for HCS12 MCU Module from Freesacle or Axiom. 
//This C code tests on-board POT of the MCU Module without the Project Board
//HCS12 MCU Module comes with BDM and ready to work with CodeWarrior IDE
//Modified from Program 13-1C of HCS12 book by Mazidi & Causey 

//In HCS12 MCU Module, XTAL=4MHz.4MHz/2=2MHz is the bus freq.  
//ATD0 channel 5 (AN05) is connected to RV1 Brown/White POT. 
//Make sure Jumper for RV1 is set. Also make sure the VB jumper for Power_SEL (next to power jack) is set since it is powered via USB cable
 
//Change the POT to see the changes on LEDs of PORTB

//In CodeWarrior, make sure you are in TBDML Mode before downloading 
//Press F7 (to Make), then F5(Debug) to downLOAD,and F5 once more to start the program execution
  
 
#include <hidef.h>      /* common defines and macros */
#include "derivative.h"      /* derivative-specific definitions */


void MSDelay(unsigned int);
void main(void) 
 {
  /* put your own code here */
  
    

    DDRB = 0xF0;    //PORTB as output
        
    ATD0CTL2 = 0x80;     //Turn on ADC,..No Interrupt
    MSDelay(1);	      //optional 	
    ATD0CTL3 = 0x08;  //one conversion, no FIFO
    ATD0CTL4 = 0xE0;  //8-bit resolu, 16-clock for 2nd phase,
                      //prescaler of 0 for Conversion Freq=1MHz  
    for(;;)
    {
    ATD0CTL5 = 0x85;  //Channel 5 (right justified, unsigned,single-conver,one chan only) 
			

    while(!(ATD0STAT0 & 0x80));
    PORTB = ATD0DR0L;  //dump it on LEDs
    
//MSDelay(2);     /optional
    }
    

  }

 void MSDelay(unsigned int itime)
  {
    unsigned int i; unsigned int j;
    for(i=0;i<itime;i++)
      for(j=0;j<311;j++);
  }