8000 alarm.exit_and_deep_sleep_until_alarms() not exiting sleep when interrupted · Issue #7081 · adafruit/circuitpython · GitHub
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alarm.exit_and_deep_sleep_until_alarms() not exiting sleep when interrupted #7081

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billedluh opened this issue Oct 18, 2022 · 1 comment · Fixed by #7196
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alarm.exit_and_deep_sleep_until_alarms() not exiting sleep when interrupted #7081

billedluh opened this issue Oct 18, 2022 · 1 comment · Fixed by #7196
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@dhalbert
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alarms and sleep rp2040 Raspberry Pi RP2040
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8.0.0

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@billedluh
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I have a simple setup with an RP2040 feather controlling some neopixels and am trying to get it to reliably deep sleep when not in use. I have a vibration switch between GND and A2, and am sleeping until the vibration switch gets triggered using

pin_alarm = alarm.pin.PinAlarm(pin=board.A2, value=False, pull=True)
alarm.exit_and_deep_sleep_until_alarms(pin_alarm)

This works great and my current consumption goes from ~28mA to ~2mA once it gets to sleep. But if I happen to trigger the vibration switch while it's in the process of going to sleep it seems to go unresponsive. Current consumption still goes down to ~2 but it no longer wakes until I toggle reset. Ive confirmed that the pull-up resistor is getting configured correctly (I see 3.3v on pin A2).

This problem is extremely reproducible on this setup, if I give it an extra second after the current has dropped down it seems to wake every time, but if I spam the vibe switch while it's getting ready to sleep it pretty consistently gets locked up.

Everything works as expected when connected to serial and using simulated deep sleep.
@billedluh
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Oh and I've reproduced the problem in both 7.3.3 and 8.0.0. What other bits have I forgotten to mention?

@dhalbert dhalbert added rp2040 Raspberry Pi RP2040 alarms and sleep labels Oct 18, 2022
@dhalbert dhalbert added this to the 8.0.0 milestone Oct 18, 2022
@dhalbert dhalbert self-assigned this Nov 10, 2022
@dhalbert dhalbert mentioned this issue Nov 11, 2022
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@dhalbert dhalbert

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alarms and sleep rp2040 Raspberry Pi RP2040
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8.0.0
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RP2040: ignore pin changes before deep sleep dhalbert/circuitpython
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@dhalbert @billedluh
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