How do I set an InputPort pin to become an OutputPort pin, and vice versa?
Or if that isn’t possible, how can I simply reset a pin so that I can create a new InputPort object using it?
Look at the TristatePort:
Is this for RLP, ie C/C++?
For RLP, if you include RLP.h then you can call:
RLPext->GPIO.EnableOutputMode(Pin,0);
or
RLPext->GPIO.EnableInputMode(Pin,RLP_GPIO_RESISTOR_DISABLED);