Help with BSP Files

[phipi]

I'm working on adding support for a custom NRF9160-based board to the ncs project. It appears to be working by simply duplicating the DK and making some modifications, however I would like to understand more about what each file is for.

I see very similar configurations in:

• Kconfig
• Kconfig.board
• Kconfig.defconfig
• BOARDNAME_defconfig

Can someone let me know if there is some documentation describing how to use these files correctly and which configurations should go where?

[Didrik Rokhaug]

Hi.

In general, Kconfig files define a menu, i.e., a set of configuration options and their relationships, while the defconfig files set the default values of the options.

In addition, you have the prj.conf file which sets configurations specific to the project, e.g., if the project uses a second UART or a specific subsystem that is usually deactivated.

Finally, we have menuconfig and SES' equivalent (Project-> Configure nRF Connect SDK Project...), that can be used to change configurations for a specific build.

When it comes to board definitions specifically, you can find more information here:

https://devzone.nordicsemi.com/nordic/cellular-iot-guides/b/getting-started-cellular/posts/nrf-connect-sdk-tutorial---part-2#h106sk0f715emkxnocjky573nwm57fv

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/application/index.html#custom-board-devicetree-and-soc-definitions

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/kconfig/index.html

https://github.com/NordicPlayground/fw-nrfconnect-zephyr/tree/master/samples/application_development/out_of_tree_board

Best regards,

Didrik

[phipi]

Thanks! I'll check these out.