Background DFU questions

RE: Background DFU questions

mosgaard2000 — Thu, 14 Nov 2019 07:58:10 GMT

I ended up using the IOT example - that works just as well.

RE: Background DFU questions

Simonr — Thu, 07 Nov 2019 07:50:09 GMT

[quote user="mosgaard2000"]So do I need to use the DFU example when working with nRF52840 or is it because I then both enable background DFU but also have the option to run BLE, USB DFU at the same time?[/quote]

I'd suggest using the DFU example in order to be sure that background DFU is enabled, and because I'm not 100% sure what this IOT example is/does.

Best regards,

Simon

RE: Background DFU questions

mosgaard2000 — Wed, 06 Nov 2019 13:15:41 GMT

Thank you.

I actually tested some more and this is what I found out:

1) There is a bootloader_w_softdevice.hex which is 479KB. I get the same size if I merge SD and BL (from IOT example).

2) There is a bootloader_w_softdevice_nrf52840.hex which is 522KB. I get that size if I merge SD and BL (from DFU example)

In my test project both files actually works, but I seem to recall (from another thread I can't find again) that the nRF52840 had some special working conditions or bugs or something.

So do I need to use the DFU example when working with nRF52840 or is it because I then both enable background DFU but also have the option to run BLE, USB DFU at the same time?

RE: Background DFU questions

Simonr — Wed, 06 Nov 2019 13:09:06 GMT

Hi Morten

I asked Vidar, and he's almost certain that he used serial bootloader with USB for this project. There should not be very many changes necessary to make it support background DFU. Just a few flags need to be set in sdk_config.h

Best regards,

Simon