Hex file explain about 5340 development

[JohnCC]

Hi,

      A simple question about 5340 hex image needs you to clarify.

I use vscode to create a example(zephyr/samples/bluetooth/peripheral_hr) with 5340 board config. Then I rebuild it and get some HEX file in build folder.

As far as my understanding. 

merged.hex and zephyr.hex -> The two are the same, representing the image of the application core

merged_domains.hex -> Represents the merged image of application core and network core

So as long as I only need flash merged_domains.hex , it means that I have burned a dual-core image, and the example can also be executed smoothly.

If I am sure that I will not change the source code of the network core, I will always develop my project like this.

Is it right?

Thank you.

John

[runsiv]

Hi 

It is a bit depended on the application you are creating. However the documentation linked below describes the different files and uses. 

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/working_with_nrf/nrf53/nrf5340.html#building-and-programming-a-sample

But as long as the network core is a child image it should be enough to just flash the merged_domains.hex

Regards

Runar