Custom DFU bootloader

[mosgaard2000]

Hi,

I have a custom board with the nRF52840.

Is it possible to customize the DFU to be able to update the firmware through other interfaces than BLE or USB/UART?

I have a SD-card connected and would like to check for a flash image on the card and then update the firmware if there is an image.

Would that be possible?

[EGawtry]

Thanks!  I like how you tied it into the serial_dfu code.  Two questions, 

1. DFU_TRANSPORT_REGISTER doesn't seem to exist.  What rev of nRF are you using?  I have 15.2.

2. I notice that you go into a complicated bootloader setup in main.  Is all that necessary for the DFU to work?

Thanks again,

-Erik

[mosgaard2000]

Hi Erik,

1. I use nRF52840 with SDK 15.3 (I believe the background DFU requires 15.3 as a minimum).

2. There is a lot of log info that is not needed. In the Main function I start with a lot of if...else statements to decide if we start the bootloader - I only uses this to check if my program needs to go to other states (not related to the bootloader). This is not necessary - you can go directly to MAIN_SM_BOOTLOADER state which is were everything regarding the bootloader is handled.

Regards,

Morten

[jbalboa]

Hi mosgaard2000, thanks a lot for your code, it helped me to understand the dfu process in uart mode.

I managed to integrate your code on my application, however, when I start the DFU process, the observer only reaches the NRF_DFU_EVT_TRANSPORT_ACTIVATED switch case and not the NRF_DFU_EVT_DFU_STARTED.

I copied the MAIN_SM_BOOTLOADER part, and I send the upgraded image stored in the sd card byte by byte, but it doesn't do the upgrade process. 

Do you know which could be the error?

You mentioned that you had to make a file converter to insert the DFU package info in the .zip file. Could it be the part I'm missing?

Thanks in advance

Javier Balboa

[mosgaard2000]

Hi Javier,

I think you are right that you are missing the file conversion.

I have made a git-hub repository and put a small program to do the DFU conversion if you need that.

https://github.com/mosgaard2000/Software_XE7

I also uploaded a main.cpp file so you can see the code I use for converesion.

[jbalboa]

OMG thank you so much!!! I'll give it a try and post the results!!!

Javier Balboa