#include <P18F458.h>
#define mybit PORTCbits.RC5		
void main(void)
  {
     TRISCbits.TRISC5 = 1;		
     TRISD = 0;				
     while(1)
      {
        if(mybit == 1)
          PORTD = 0x55;
        else
          PORTD = 0xAA;
      }  
  }