What are the preconditions to read GPREGRET?

RE: What are the preconditions to read GPREGRET?

Vidar Berg — Wed, 16 Oct 2024 10:21:38 GMT

Thanks for the update. Yes, these SD APIs allow the application to access peripherals that have been reserved by the SoftDevice (POWER in this case). This is not necessary when the SoftDevice is disabled. It's generally a good practice to check the return value when using SD APIs.

https://docs.nordicsemi.com/bundle/sds_s132/page/SDS/s1xx/sd_resource_reqs/hw_block_interrupt_vector.html

RE: What are the preconditions to read GPREGRET?

geert_venken — Wed, 16 Oct 2024 09:27:12 GMT

Thanks Vidar,

Indeed using the nrf_power API works.

Looks like SoftDevice was the problem,

RE: What are the preconditions to read GPREGRET?

Vidar Berg — Wed, 16 Oct 2024 08:59:20 GMT

Hi,

The sd_power_gpregret_* APIs can only be used after the Softdevice is enabled. They will return with an error otherwise.

If you want to read the register before the softdevice is enabled, you can use the nrf_power_gpregret_get() function from nrf_power.h.

Best regards,

Vidar