Python GPIO Library for the Rock64 (R64.GPIO)
#38
Internal SoC PullUps are usually between 20K to 100K.

So, using a external PullDown to put it low is like creating a voltage divider with the internal pullup, therefore with a external 20K, you get a voltage that is neither a LOW or a HIGH, explaining why you get interrupts triggered repeatedly.

If you use a external 1K as a pulldown instead, you will see that will be close to 0V ...
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RE: Python GPIO Library for the Rock64 (R64.GPIO) - by klausfelix - 07-02-2021, 03:20 PM

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