Access DFU settings page

RE: Access DFU settings page

William E. — Fri, 15 Mar 2019 07:53:19 GMT

If anyone is interested,

I just went with providing the DFU settings page address from the linker script and then I read it manually in my application. I added an assert in the bootloader linker script that asserts that the bootloader settings page is 0x0007 F000 along with a message prompting to update the corresponding address in the linker script of the application if changed.

Perhaps not the most ambitious or most proper way, but it works.

RE: Access DFU settings page

mrono — Fri, 14 Dec 2018 11:13:53 GMT

There is code in nrf_dfu_settings that suggests Nordic had planned a proper (or at least standard) way for the application to read the settings (NRF_DFU_SETTINGS_IN_APP), but it seems that it is not fully implemented.

Also when generating a bootloader settings page for flashing the bootloader you specify a version for the settings page, but that info doesn't seem to be used by the code actually reading the settings.

I ended up assuming the structure is fixed. And if it ever does change I'll just force an application update along with the new bootloader.

So if anyone from Nordic is listening, a proper way would be appreciated...

RE: Access DFU settings page

Andy — Fri, 14 Dec 2018 10:34:20 GMT

I would recommend you to put a clean copy of the SDK under source control. Especially for this case, since you need to share some files between application and bootloader. In most cases, copying modules directly into your project is enough, but I'd say that for this particular case you need to share the same modified files in both projects.

RE: Access DFU settings page

William E. — Fri, 14 Dec 2018 09:57:56 GMT

Hi Andy,

thank you for the suggestion, It seems like the most "proper" way to do it as far as I can tell. However, I prefer not to modify the SDK as I don't have it under source control, I could perhaps put the relevant files under source control.

Would be great if there is some other "proper" way of doing it.

RE: Access DFU settings page

Andy — Thu, 13 Dec 2018 13:41:46 GMT

Hi William,

I had exactly this requirement for my application as well. What I ended up doing is creating SVCI async functions that the application can call on the bootloader. It works very well and it's maintainable. But it is a rather complex implementation that requires you to modify some SDK files.