How to configure a custom child image to network core on nrf5340dk

[Pelle]

Hi

How do I configure a custom child image for the network core on nrf5340dk? 

We're using Zephyr RTOS, and want to do a multi image build when building the application (nrf5340dk_nrf5340_cpuapp).

Not exactly sure how to configure the build system. 
Tried adding:

add_child_image(
NAME network_core
SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/network_core
DOMAIN CPUNET
)

and in the app directory added a directory called network_core:

app/network_core

What's needed to go into the app/network_core directory?

source files, a new CMakeLists.txt?

[Pelle]

And I do not want to use a sample, want to make a custom child image

[Amanda Hsieh]

Hi, 

How do I configure a custom child image for the network core on nrf5340dk? 

Take a look at Defining and enabling a child image. 

Here is a similar case. 

What's needed to go into the app/network_core directory?

source files, a new CMakeLists.txt?

The same files are required for building. 

-Amanda

[Pelle]

Have already looked at examples, but doesn't work.

Get the error that "CONFIG_PARTITION_MANAGER_ENABLED was not set...."

Not very clear how to configure in the examples

[Amanda Hsieh]

Try also adding CONFIG_PARTITION_MANAGER_ENABLED=y in prj.conf.

-Amanda

[Pelle]

it then gives me an error that "attempt to assign the value 'y' to the undefined symbol PARTITION_MANAGER_ENABLED

When I read in the Kconfig documentation it says "read-only option" :