RE: DFU in nrf52820

Elfving — Thu, 27 Jan 2022 11:30:10 GMT

Hello Visma, and sorry about the delay.

[quote user=""]I think it's possible to add DFU with one of either bluetooth roles, please let me know if it's possible?[/quote]

Yes, both should be possible.

[quote user=""]Is there any minimal version of following build configuration, so that everything can fit in?[/quote]

In a way. There are several configurations that are enabled by default that should be turned off in order for you to get a minimal build. You can find all of these configurations on the prj_minimal.conf files that are provided in some of our example projects. See for instance samples/bluetooth/peripheral_uart/prj_minimal.conf, and try to compare these configurations with what you need, and see the resulting flash space usage.

[quote user=""]I wish to overwrite current running firmware using serial DFU and without secondary slot in flash.[/quote]

There is allways the option of doing DFU using serial recovery mode, with which you can get a new image over the serial port. You would have to enter serial recovery mode either holding a button on startup or setting the GPREGRET register. It also has some other limitations. Besides that, it seems that you would need a secondary slot.

Best regards,

Elfving