Add UARTE in DFU bootloader to update an STM32

[vonRollChristophe]

Hi,

I use the secure BLE Bootloader to update the nRF52840 (with S140).

Now I want to add a UARTE to update the STM32 connected to nRF52.

Do you have a solution to do that? All my tries have not worked.

Thanks for help.

Best regards.

[Simonr]

Hi Christophe

I'm sorry, but we don't have a finished example for it, as the implementation will change based on what the external device here will be, so you're on your own in the implementation itself.

What event is it exactly that you're running into here? Does Libuarte require the SoftDevice to be enabled? If the issue is that the SoftDevice is enabled in the DFU and then trying to be enabled again when the application begins, you should disable it before moving to the application.

Best regards,

Simon

[vonRollChristophe]

Hi Simon,

I think the SoftDevice is not necessary for LibUarte.

Last days, I tried to update the STM32 with the application, and that's works. So I will try to update the STM32 with the application. The bootloader will receive the new firmware in DFU mode and transfer information to the application with a specific not-initialized RAM space. The application will make the STM32 update. I hope that will run as I want.