RE: Preparing Wakeup Buttons in BSP causes Automatic Reset After Shutdown

BendaEng — Thu, 29 Aug 2019 13:33:49 GMT

Hi,

I didn't reply yesterday when I figured it out. But you are exactly right, that was the issue. My circuitry was inverted from what BUTTONS_ACTIVE_STATE was set to. A button press on my circuit causes a low to high transition.

Thanks again!

RE: Preparing Wakeup Buttons in BSP causes Automatic Reset After Shutdown

Vidar Berg — Thu, 29 Aug 2019 13:00:33 GMT

Hi,

Just to make sure, have you verified that the BUTTONS_ACTIVE_STATE value corresponds with your button circuitry? I.e., BUTTONS_ACTIVE_STATE ==0 if the button is active low and BUTTONS_ACTIVE_STATE ==1 if active high?

That said, you don't have to re-configure the input if it's already configured with sense enabled which seems to be the case here. But you should do it for all of the other button inputs to avoid unintentional wakeups. nrf_gpio_cfg_default() can be used for this. It will configure pins back to the reset state (input, disconnect).