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Nice explanation especially about the data race risk which I hadn't thought about. When I use sleep mode, with wakeup on either external or pin change interrupt, I usually, if compatible with the application, (a) have an empty interrupt service routine and (b) don't detach the interrupt which is anyway attached in setup(). The sleep_disable() command immediately follows the sleep_cpu() command then any other code to respond to the wake up.

6v6gt
– 6v6gt

2023-01-21 05:08:39 +00:00
Commented Jan 21, 2023 at 5:08

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