Reading UICR

[Marbro1965]

Hello,

is it possible to read UICR at address FF8000 from a non secure application for nrf(160.

If yes, can you provide sample code and CONFIG to enable in prj.conf.

Best Regards

[Sigurd]

See this post, it's for nRF54, but the same methods apply to nRF91 as well.
RE: Static Partition Alignment 
see also https://github.com/nrfconnect/sdk-nrf/blob/main/samples/tfm/tfm_hello_world/src/main.c

[Marbro1965]

I applied to nrf9160. Modified the ranges in C:\ncs\v2.9.0\zephyr\modules\trusted-firmware-m\nordic\include\tfm_read_ranges.h. In my case &UICR->OTP[0] is 0xFF8100. I rebuild all but it does not read the OTP[0].

How do I know that it is compiling the new ranges?

Thanks

[Sigurd]

Marbro1965 said:

I rebuild all but it does not read the OTP[0].

Did you get any error codes? What did it read?

[Marbro1965]

The error code is NRF_ERROR_INVALID_PARAMS.

I thought it was address but I cheched and it is &UICR->OTP[0], The same define in ranges. In 2.9.0 I have only one ranges file, while in 2.7.0 there are many. 

Now I went back to 2.7.0 because of many problems on intellisense. But I did not check if in 2.7.0 it works. I have to modify all ranges file because i do not know which is used.

Anyway i do not like The idea to modifica sdk, and was looking to a way to override those ranges. But it is quite difficult to find information about.