Issue nRF Connect SDK Intermediate - Exercise 3 - Interfacing with ADC using nrfx drivers and TIMER/PPI

RE: Issue nRF Connect SDK Intermediate - Exercise 3 - Interfacing with ADC using nrfx drivers and TIMER/PPI

Jørgen Holmefjord — Thu, 13 Feb 2025 15:45:43 GMT

You need to remove "CONFIG_NRFX_DPPI=y" from the prj.conf file, and then add "CONFIG_NRFX_GPPI=y"

RE: Issue nRF Connect SDK Intermediate - Exercise 3 - Interfacing with ADC using nrfx drivers and TIMER/PPI

VitalityVH — Thu, 13 Feb 2025 08:06:43 GMT

Hey!

Did you put CONFIG_NRFX_DPPI=y or CONFIG_NRFX_DPPI00=y?

RE: Issue nRF Connect SDK Intermediate - Exercise 3 - Interfacing with ADC using nrfx drivers and TIMER/PPI

twalsh_mri — Wed, 12 Feb 2025 17:24:07 GMT

I seem to have the same issue, for the same board and NCS version.

I've tried opening the solution and building that, but I can't get past the step of adding a build configuration for the NRF54L15. Adding the lines to prj.conf that you and the OP mentioned don't seem to fix things either. No matter which I tried, I got the following error when I try to configure the build:

error: NRFX_DPPI (defined at C:/ncs/v2.9.0/zephyr/modules/hal_nordic\nrfx/Kconfig:28,
modules\hal_nordic\nrfx/Kconfig:28) is assigned in a configuration file, but is not directly user-
configurable (has no prompt). It gets its value indirectly from other symbols. See
Parsing C:/ncs/v2.9.0/zephyr/Kconfig

RE: Issue nRF Connect SDK Intermediate - Exercise 3 - Interfacing with ADC using nrfx drivers and TIMER/PPI

VitalityVH — Fri, 07 Feb 2025 12:57:27 GMT

Hey Jørgen,

I was indeed working with the 2.9.0 version of NCS, adding the CONFIG_NRFX_GPPI=y did do the trick.
For the DPPI config I added the "CONFIG_NRFX_DPPI00=y" option.

Thank you for the quick response, I suggest adding this solution to the exercise itself!

Kind regards,

Vital

RE: Issue nRF Connect SDK Intermediate - Exercise 3 - Interfacing with ADC using nrfx drivers and TIMER/PPI

Jørgen Holmefjord — Fri, 07 Feb 2025 12:47:05 GMT

Hi,

Which NCS version are you using when testing this exercise? It was tested on nRF54L15 with NCS 2.8.0 and should work there with the solution found in the GitHub repository.

nrfx_gppi is series of helper functions that provides a common API for both PPI and DPPI.

I noticed that the Kconfig CONFIG_NRFX_DPPI is not directly assignable in NCS v2.9.0. Can you try to add CONFIG_NRFX_GPPI=y to your prj.conf file if you are using v2.9.0, and see if this resolve the problem you are seeing?

Best regards,
Jørgen