nrf9160 - configuring with west and different board always results in the same zeyhyr_settings.txt

RE: nrf9160 - configuring with west and different board always results in the same zeyhyr_settings.txt

Didrik Rokhaug — Tue, 02 Mar 2021 08:57:24 GMT

This comment from zephyr/cmake/app/boilerplate.cmake should explain it:

# 'BOARD_ROOT' is a prioritized list of directories where boards may
# be found. It always includes ${ZEPHYR_BASE} at the lowest priority.
zephyr_file(APPLICATION_ROOT BOARD_ROOT)
list(APPEND BOARD_ROOT ${ZEPHYR_BASE})

In other words, nrf/zephyr/module.yml sets the BOARD_ROOT to point to nrf, so the boards defined in nrf is included, in addition to the boards defined in zephyr.

RE: nrf9160 - configuring with west and different board always results in the same zeyhyr_settings.txt

stes — Mon, 01 Mar 2021 16:02:09 GMT

Thank you for the quick response. But still I would assume that BOARD_ROOT refers to the correct directory, which would be /zephyr as the board is located in /zephyr/boards/..., not in /nrf/boards

Best

Stefan

RE: nrf9160 - configuring with west and different board always results in the same zeyhyr_settings.txt

Didrik Rokhaug — Mon, 01 Mar 2021 15:41:37 GMT

Hi,

A West module can have a <module>/zephyr/module.yml file that describes it, as well as integrates it into Zephyr's build system.

Here is the contents of nrf/zephyr/module.yml:

build:
  cmake: .
  kconfig: Kconfig.nrf
  settings:
    board_root: .
    dts_root: .
    module_ext_root: .

As you can see, it sets board_root and dts_root to be the nrf directory.

Best regards,

Didrik