how to add a custom memory section specifically for the NRF5340 in Zephyr project

RE: how to add a custom memory section specifically for the NRF5340 in Zephyr project

remtec — Tue, 12 Nov 2024 10:42:28 GMT

Hi kpi_xie
I just tried inserting "zephyr_linker_sources(SECTIONS rem_ram_sections.ld)" into CMakeLists.txt and it seems to work well for what I need.
Thanks for your reply.

RE: how to add a custom memory section specifically for the NRF5340 in Zephyr project

kpi_xie — Mon, 11 Nov 2024 10:53:45 GMT

Hi remtec

I cannot be certain if your requirements are the same as mine, but I will briefly describe my approach for your reference. I directly allocated a flash segment and a RAM segment in pm_static.yml that are not used by my Zephyr program. Then, I compiled a firmware for the same core using another compilation tool, where the firmware content only includes the library that I need to update separately and its dependent libraries, with the address range corresponding to these segments. This way, this part of the firmware will be confined to execute within the specified flash and RAM areas, and I can directly call the functions within the library through the corresponding addresses.

At first, I also wanted to configure a project in the Zephyr VS Code environment that does not include Zephyr and is hardware-independent, but that seems to be very difficult.

RE: how to add a custom memory section specifically for the NRF5340 in Zephyr project

remtec — Mon, 04 Nov 2024 07:51:03 GMT

Hi kpi_xie.

I'm in a very similar situation to yours.

Can you suggest how you solved the problem?

Thank you

RE: how to add a custom memory section specifically for the NRF5340 in Zephyr project

Amanda Hsieh — Thu, 17 Oct 2024 18:13:09 GMT

Happy to hear you resolved it. 🙂

RE: how to add a custom memory section specifically for the NRF5340 in Zephyr project

kpi_xie — Thu, 17 Oct 2024 08:46:06 GMT

We have resolved this issue and achieved our development goals. Thank you for your support.

RE: how to add a custom memory section specifically for the NRF5340 in Zephyr project

kpi_xie — Fri, 11 Oct 2024 01:46:31 GMT

The purpose of doing this is to maintain the independence between a portion of libraries and the main program by linking them to specific flash and RAM locations. This allows me to update the libraries separately without affecting the execution of the main program.

RE: how to add a custom memory section specifically for the NRF5340 in Zephyr project

kpi_xie — Fri, 11 Oct 2024 01:41:26 GMT

My SDK version is 2.6.1

Yesterday, I discovered that by setting CONFIG_HAVE_CUSTOM_LINKER_SCRIPT=y and CONFIG_CUSTOM_LINKER_SCRIPT="ext_lib_memory.ld," I could use my own linker script for Zephyr. However, I found that all the automatically generated components were missing. I would like to add my own content while retaining the existing automatically generated content.

RE: how to add a custom memory section specifically for the NRF5340 in Zephyr project

Amanda Hsieh — Wed, 09 Oct 2024 18:05:38 GMT

(updated)

I want to XY-problem check this.

What is your use-case for having it in the linker? What is the thing this will fix for them?

Hi,

I am working on your case and will update later when I collect enough information.

Regards,
Amanda H.