direct manipulation port for DUE

Official Hardware Mega Due
9

RE: masks

@Palliser,

You can look for PORT PIN (pale yellow) of Graynomad's Arduino Due pinout diagram as a reference.

So ,

    uint32_t pin_17 = (1u << 12); // mask for pin 17
    uint32_t pin_20 = (1u << 12); // mask for pin 20

Then the masks are the same, but in use they are applied to different ports?