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How to measure period between GPIO events

Question asked by shannon wanner on Jun 28, 2017
Latest reply on Jul 4, 2017 by Carlos_Musich

I am attempting to measure the period between two events on different GPIO pins. I am assuming that to do this I use GPIO interrupts and GPT timer and concern on resolution down to 10 ns detection. Note that I am doing this in the user space? Is this correct path or is there a better method? What overhead will the software bring?