nRF5340: best way to configure P0.02 (NFCT) as GPIO with TFM

RE: nRF5340: best way to configure P0.02 (NFCT) as GPIO with TFM

Sigurd Hellesvik — Mon, 19 Aug 2024 12:36:56 GMT

Yes

RE: nRF5340: best way to configure P0.02 (NFCT) as GPIO with TFM

Matteo Elimo — Fri, 16 Aug 2024 16:51:11 GMT

Thank you, that sounds like the current solution will work for the time being, and then we will migrate to 2.7 and we will just be able to remove CONFIG_NFCT_PINS_AS_GPIOS, as PC0.02 will be a GPIO by default, is that correct?

RE: nRF5340: best way to configure P0.02 (NFCT) as GPIO with TFM

Sigurd Hellesvik — Fri, 16 Aug 2024 08:14:53 GMT

So this was unfortunately not resolved for 2.6. We have a fix that got merged in 2.7 with the ‘correct’ way of configuring this that will be supported in the future in this PR here:

https://github.com/nrfconnect/sdk-nrf/pull/14228

The way to do this with this PR is that you just enable or disable the nfct device in the overlay of the non secure board.
So by default the NFCT as GPIOS will be enabled since the device is disabled. In case you want to use the NFCT device you will have to enable it in the non secure overlay like this:

&nfct {status = "okay";

};

This will basically automatically disable the NFCT as GPIOS option since you are using the NFCT device.

RE: nRF5340: best way to configure P0.02 (NFCT) as GPIO with TFM

Sigurd Hellesvik — Thu, 15 Aug 2024 12:54:49 GMT

Hi,

I will look into this and return with more information on Monday.

Regards,
Sigurd Hellesvik