wakeup by external interrupt from deepsleep

OpenMV Boards
1

For OpenMV, is it possible to wake up the system from the deepsleep or standby mode, using the external trigger.

extint = pyb.ExtInt(“P0”, pyb.ExtInt.IRQ_RISING, pyb.Pin.PULL_NONE, whatever)
machine.deepsleep()

I tried a few times, it seems that the external trigger does not wake the system up.

While etc could wake it up, as stated in the library.

Thanks

2

Try machine — functions related to the hardware — MicroPython 1.15 documentation. Deep sleep can only be woken up by the RTC.

3

Hi Kwabena,

Is still wake up from deepsleep() using EXT interrupt not supported ? It would be of great help to use the very-lowpower deepsleep mode and wake up for an event using an Arduino EXT Trigger.

  • Althaf
4

It’s possible to wake-up from stop mode (machine.sleep()) with extint, see the example:

https://github.com/openmv/openmv/blob/master/scripts/examples/19-Low-Power/extint_wakeup.py

5

On the AE3, I’m only currently only able to wake up from deepsleep using the hard reset button.. I don’t see any example to wakeup using the RTC or the IMU… is this supported yet?

6

Both the RTC and IMU support deep sleep wakeup.

Pass a time value.

As for the IMU, you need to program its registers via the datasheet to generate a pulse via its interrupt pins, but the AE3 trigger is already armed to wake up from deep sleep.