// Example 7b: LCD Display
// Detect object with IR sensor
#include <hidef.h>      /* common defines and macros */
#include <mc9s12dg256.h>     /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12dg256b"

#include "main_asm.h" /* interface to the assembly module */

void main(void) {
  char* q1;
  char* q2;
  char* blanks;
  q1 = "No Object";
  q2 = "Object Nearby";
  blanks = "                ";
  PLL_init();						  // set system clock frequency to 24 MHz
  lcd_init();             // enable lcd
  DDRS = 0x08;            // PS3 output, PS2 input
  PTS = 0;                // turn on IR transmitter
  while(1){
     if(PTS & 0x04){         // PT2 is 0 for IR return
        set_lcd_addr(0x00);
        type_lcd(q1);						// write q1 to row 1
        set_lcd_addr(0x40);
        type_lcd(blanks);				// write blanks to row 2  
     } else {
        set_lcd_addr(0x40);
        type_lcd(q2);						// write q2 to row 2
        set_lcd_addr(0x00);
        type_lcd(blanks);				// write blanks to row 1     
     }
  }
}