1 year, 1 month ago.
SMT32L4 GPIO Needs 3 ms to Cause Wake from Deep Sleep
I have a NUCLEO_L433RC_P and want to use
MBED_TICKLESS. One of the wake-up sources needs to be a GPIO.
I'm creating an
InterruptIn and adding a fall handler:
InterruptIn interrupt_in(PB_4, PullUp);
If Mbed OS has entered deep sleep it appears the GPIO must be low for 3 ms in order to wake-up the MCU and for the interrupt to fire.
In other words, for pulses more than 3 ms what I trying appears to work but less than 3 ms and nothing happens. 3 ms seems like a long time to me!
MBED_TICKLESS defined a much shorter pulse will cause the interrupt to fire.
Does this mean anything to anyone?
Any thoughts greatly appreciated.
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