gpio stay in high state

RE: gpio stay in high state

Håkon Alseth — Mon, 23 Aug 2021 06:18:25 GMT

Your input is floating. You should pull it to a defined level, with either setting internal pull resistor in the NRF_GPIO->PIN_CNF register, or by adding an external pull-resistor on this line.

Kind regards,

Håkon

RE: gpio stay in high state

PaulAlexandreP — Fri, 20 Aug 2021 13:30:40 GMT

Hi,

no I haven't, but is it possible that the pin stays in high state if the nRF stays in reset ?

RE: gpio stay in high state

Håkon Alseth — Fri, 20 Aug 2021 10:13:20 GMT

Hi,

[quote user=""]"Sometimes" (that the pain point), the pin stay on high level. I don't know if the problem is only the pin state or the nRF itself is in a strange state (I use this pin to wakeup the nRF). I never see the problem on debug mode, only see on release.[/quote]

Do you have an external pull-resistor on the specific pin? it seems that you're currently configuring it with no pull, meaning that you will need an external source that pulls the pin to a idle state.

Kind regards,

Håkon