Flashing SD+App+BL SDK12.2

RE: Flashing SD+App+BL SDK12.2

bjorn-spockeli — Wed, 10 Apr 2019 15:14:07 GMT

I recommend creating a new Question for your issue and then link to this question in your new question. Also please upload the bootloader hex and the settings hex as well as state which commands you used to generate the settings file as well as which nrfutil version you used.

Best regards

Bjørn

RE: Flashing SD+App+BL SDK12.2

MaxRPEng — Wed, 10 Apr 2019 09:32:38 GMT

Hello, i know it is a bit old but i have the same problem. It should not be that diffucult but it is.

I use nRF51822, SDK12, Softdevice 130 2.0.1.

When i try to flash all three parts (softdevice, application and bootloader) it alsways starts with the bootloader.
I was not able to merge the settings.hex with my bootloader. i get the error "there are conflicts"

Is there any help for my problem?

thanks a lot

RE: Flashing SD+App+BL SDK12.2

bjorn-spockeli — Wed, 08 Feb 2017 15:35:58 GMT

Hi Brett,

This is documented on the pc-nrfutil GitHub page, here is the link, as well as on this page on our Infocenter.
I think you can, but its not recommended, see 3.
No, you do not need to modify the settings since you're merging in the settings file. Yes, you should remove BANK_VALID_APP.

RE: Flashing SD+App+BL SDK12.2

brett_anderson — Wed, 08 Feb 2017 15:17:11 GMT

Sorry, 3. Do I still need to edit bootloader_settings.c if I am merging in a settings hex file? Should I remove the 'BANK_VALID_APP'?

RE: Flashing SD+App+BL SDK12.2

brett_anderson — Wed, 08 Feb 2017 15:15:55 GMT

Thanks Bjorn. A couple quick follow up questions:

Is this documented somewhere and I missed it?
the bootloader_settings.c file reserves space for the settings. Can I write in the settings here?

RE: Flashing SD+App+BL SDK12.2

Nguyen Hoan Hoang — Tue, 07 Feb 2017 23:59:40 GMT

The IDAPnRFProg program will flash Softdevice + App + DFU and set all necessary data to boot into the app. No nrfutil require or mergehex require. nrfutil is still needed when you do OTA.

RE: Flashing SD+App+BL SDK12.2

Daniel Wang — Tue, 07 Feb 2017 23:53:19 GMT

You get the correct bootloader settings with that?.... you still have to use nrfutil ?

RE: Flashing SD+App+BL SDK12.2

Nguyen Hoan Hoang — Tue, 07 Feb 2017 19:22:53 GMT

Using the IDAP-Link Debug Jtag with IDAPnRFPRog, it will take care of the proper settings for you. You only need to give it the 3 hex files.

RE: Flashing SD+App+BL SDK12.2

bjorn-spockeli — Tue, 07 Feb 2017 14:38:20 GMT

Hi Brett,

you are correct that the bootloader does not know that there is a valid application if you flash the bootloader, application and SoftDevice with a programmer.

In order to set the correct bootloader settings you need to generate a bootloader settings hex file using nrfutil.

nrfutil settings generate --family NRF52 --application application.hex --application-version 3 --bootloader-version 2 --bl-settings-version 1 settings.hex

which will generate the settings.hex file and output something like this to your terminal

Bootloader DFU Settings:
* File:                 settings.hex
* Family:               nRF52
* CRC:                  0x2B1E5436
* Settings Version:     0x00000001 (1)
* App Version:          0x00000003 (3)
* Bootloader Version:   0x00000002 (2)
* Bank Layout:          0x00000000
* Current Bank:         0x00000000
* Application Size:     0x00003AF4 (15092 bytes)
* Application CRC:      0xF7A69330
* Bank0 Bank Code:      0x00000001

The generated settings.hex file should be merged with the bootloader hex file using the following mergehex command

mergehex -m settings.hex secure_serial_bootloader.hex -o bootloader_w_settings.hex

The merged hexfile can now be flashed to the nRF52 along with the application and the softdevice. (You can also use mergehex to create a single hex file that contains the bootloader, bootloader settings page, application and softdevice).

Best regards

Bjørn