newbee question

Hi

   I'm comming from another world of MCU and I'm at the beginning of my
long lurning curve,  Here is what I'm trying to do:

The main question is why nothing work...

#define RS        1
#define RS_SET          BitWrPortI(PCDR, &PCDRShadow, 1, RS);
#define RS_CLR          BitWrPortI(PCDR, &PCDRShadow, 0, RS);

main()
{
   int i;

   for (i=0;i<7;i++)
   {
     //BitWrPortI(PADDR,&PADDRShadow,1,(1<<i)); why this line don't compile?
      BitWrPortI(PBDDR,&PBDDRShadow,1,(1<<i));
      BitWrPortI(PCDDR,&PCDDRShadow,1,(1<<i));
   }

  while(1)
  {

   RS_SET;
   WrPortI(PADR,    &PADRShadow,i++);
   RS_CLR;
   }
}

Thanks for any info
Yours truly
Sylvain Bissonnette