Shared configuration in case of multiimage build

[Hiihtaja]

Hello !

I have multi image build and in app_core Kconfig some own definitions like NET_L2_MY_VALUE =1.

Is any way to define if this value can be visible to network core image ? Or how to share own config value between core and network images ?

Regards,

Eugene

[Charlie]

Hi Eugene,

Is any way to define if this value can be visible to network core image ? Or how to share own config value between core and network images ?

I am not sure if I understand this question correctly. Do you want to also use NET_L2_MY_VALUE =1 as a building time configuration for the network core? then just use it if you need it on your network core firmware.

application core and network core are basically running different firmware, they communicate through shared memory and IPC signalling. 

Best regards,

Charlie

[Hiihtaja]

Hi Charlie !

When I compile firmware for both cores, I have common settings what should be visible in both firmwares.

in Kconfig of app core there are populated.

Can I avoid dublication and set value once in prj.conf of core image and be sure if the same value and config flag will be visible for both cores during build process ?

Regards,

Eugene

[Charlie]

Hi Eugene,

You can create an overlay file for them, then load the same overlay file for different projects to make sure they use the same common configurations.

Best regards,

Charlie

[Hiihtaja]

Hi Charlie !

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_multi_image.html

But all of those config lines need to be provisioned in prj.conf files and visible in menuconfig and only after that is possible to set those via overlay.

Now I'm able to have 4 independent menuconfigs;

west build -t menuconfig

west build -t mcuboot_menuconfig

west build -t cpunet_menuconfig

$ west build -t b0n_menuconfig
-- west build: running target b0n_menuconfig
ninja: error: unknown target 'b0n_menuconfig'

network bootloader dosn't work , may be I use wrong menuconfig line ?

and by this line :

-Dchildimageone_OVERLAY_CONFIG=extrafragment.conf[...]

I can add some common definitions for all chields if need.

But how to provisioned those config lines for app and network images ?

Include rsource "Kconfig.mydriver" to both KConfigs ?
In this cases they can be provisioned and by overlay have common definitions for both cores ?

Regards,
Eugene
 

[Charlie]

Hi Hiihtaja,

Now I understand you better.

You can refer to nRF5340: Multicore application — nRF Connect SDK 2.2.0 documentation (nordicsemi.com) sample.

In this sample, the firmware running on the application core and network core share some configurations, and even the same source codes.

Best regards,

Charlie