nrf5340: Using GPIOs on P1 in non-secure mode without changing spm.c in the SDK

RE: nrf5340: Using GPIOs on P1 in non-secure mode without changing spm.c in the SDK

Sigurd Hellesvik — Wed, 31 Aug 2022 15:26:31 GMT

Hi Niklas,

I might have misunderstood your usecase.
First I though you wanted to control GPIO1 from the Secure partition.

But you want to control GPIO1 from your Non-Secure application (main.c), right?

In this case, I do not think you need to do anything special.
SPM might have set P1.04 to Secure by default, but TF-M has different defaults.
I added a sample blinking Pin 1.04 to show how. (The sample is a copy of the Zephyr Blinky Sample.)
Is this what you are looking for?

devzone.nordicsemi.com/.../blinky_5F00_p1_5F00_04.zip

Regards,
Sigurd Hellesvik

RE: nrf5340: Using GPIOs on P1 in non-secure mode without changing spm.c in the SDK

NiklasT — Wed, 31 Aug 2022 13:52:43 GMT

Hi,

Thank you for your fast reply!

I reopened this because we didn't manage to set GPIO 1.9 by creating this secure partition. Is there perhaps a simple example we could use for this? The example you linked contains a lot of other methods we don't need and also uses the GPIO as an interrupt input as opposed to setting a simple output.

Best,

Niklas

RE: nrf5340: Using GPIOs on P1 in non-secure mode without changing spm.c in the SDK

Sigurd Hellesvik — Tue, 30 Aug 2022 09:19:39 GMT

Hi Niklas,

In v2.0.0 and newer of the nRF Connect SDK, the TF-M secure peripheral partition show how you can do this.

Regards,
Sigurd Hellesvik