Can I write App code and DFU code in j-link at once?

[Youngjun]

Hello.

I have a question about programming a dfu + softdevice + app code using j-link.

I programed like below for using wireless firmware update.

1. program softdevice using j-link
2. program dfu using j-link
3. update app code through ble

I programed all hex file(softdevice + dfu + app) at once because i wanted to reduce a production process.

when i program all hex using programmer, i found some code is not written.

(left picture : programed softdevice hex, dfu hex and app hex using programmer)

(right picture : programed app code using dfu) 

     

Is there a way to write all code(softdevice + dfu + app) at once using programmer?

Regards,

Youngjun

[Eugene Yu]

Hello Youngjun,

There are lots of explanations for the Secure DFU on the web.

Here are some examples.

Implementing nRF OTA DFU over Bluetooth Low Energy (Part 3) - Novel Bits

NORDIC_5F00_Secure_5F00_DFU_5F00_KR.pdf (nordicsemi.com)

We are already providing the tool for combining the multiple hex files for production that is called "mergehex.exe".

You may easily find out the file in your environment.

Usually, it located in "C:\Program Files\Nordic Semiconductor\nrf-command-line-tools\bin\".

To have a working combined Hex file, you must have "bootloader settings" that are described in the above links.

Regarding the new placements that you mentioned, this is related to your application.

If you use peer manager with default configuration, it will reserve several pages for storing bonding information.

Thanks,

Eugene