(1)
The direction of the bean is set to input.

 MAIN.C

void main(void)
{
  /* Wait until "0x55AA" is on the port */
  while( Word1_GetVal() != 0x55AA );
    :
}

(2)
The direction of the bean is set to output.

 MAIN.C

void main(void)
{
  Word1_PutVal(0x55AA);
  /* "0x55AA" is on the port */
  
  for (;;) {
  /* Invert output level of ninth pin on the port */
    Word1_NegBit(8);
  }
}

(3)
The direction of the bean is set to input/output.

 MAIN.C

void main(void)
{
  Word1_SetDir(FALSE);  // Set input mode

  /* Wait until "0xFFFF" is on the port */
  while( Word1_GetVal() != 0xFFFF );
  
  Word1_SetDir(TRUE);   // Set output mode

  Word1_PutVal(0);      // Set "0x0000" on the port
}