Ok ok ok, if I get it right, that means that I'll not need to add the ampersand to "portOutputRegister(digitalPinToPort(13))" as your previous suggestion, because "( &(port->PIO_PDSR) )" will already return that pointer, right?
By the way, can you explain me the meaning of "->"? Or point me to some place to read about it?
I'm not finding any reference to it.
Thank you.
BR,
Joao