GPIO (General-Purpose Input/Output)

GPIO pins can be controlled as either input or output pins:

• Output digital pins are writable as high or low.
• Input digital pins are readable as high or low and generate interrupts on changes.
• PWM output pins are writable with values between 0 and 255.

Céu-Arduino currently provides the following drivers:

• Digital Output
  • doc
• Digital Input
  • With external interrupts
    • doc
  • With pin-change interrupts
    • doc
  • Difference between external and pin-change interrupts:
    • http://forum.arduino.cc/index.php?topic=221428.0
• PWM Output:
  • doc