Quote:
If enabled, all four fire off on both edges. If you are interested in executing an ISR on only one edge, just examine the state of the pin in the ISR and execute your code only when it is at the right logic level (e.g., if it's a one, a rising edge just happened). If you're using my code, I pass the logic level into the ISR for you.
-Kevin
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How should I go about reading that logic level?
-Stephen