nRF52840 call DFU from own application

Hi everyone.
I am writing to have an important info, that is, is it possible to load a .hex file, preloaded in an external flash, to program from my application in the nRF52840 flash?

I need to change firmware while an application is already running.

Obviously using the BLE channel with own APP I would send a command to load a file first.hex or second.hex etc. etc.

Thank you for your kind reply.

Fpol

0 user116408 over 4 years ago

You Update firmware via BLE or Serial?
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0 user103636 over 4 years ago in reply to user116408

HI thanks for the reply.
So, I don't use neither UART nor BLE, I preload an external flash and then from my application I have to take files and overwrite the nRF52840 in flash.

fpol
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0 user14926 over 4 years ago

Hi,

We do not have any examples showing how to do this, but it should be possible if you rewrite the bootloader to check the external flash for a valid firmware to be activated.

Are you using nRF5 SDK, or nRF Connect SDK? The latter have support for external flash, which can be used for firmware updates (see Using external flash memory partitions).

Best regards,
Jørgen
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0 user103636 over 4 years ago in reply to user14926

Hi Jørgen.

Thank you so much for your answer.

I use HW: NRF52840-DK

and then IDE: Integrated study SEGGER for ARM
Version 5.42a Build 2021040600.45790
Windows x64

Can you help me understand where to find the bootloader source code and how to edit?

Thank you in advance.

BR

fpol
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0 user103636 over 4 years ago in reply to user103636

Hi Jorgen,

any news?

How to proceed?

Very thanks.

BR

fpol
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