USB DFU help

RE: USB DFU help

Ken A — Wed, 27 Mar 2019 17:31:17 GMT

Yes this worked. Thank you.

RE: USB DFU help

AndreasF — Tue, 26 Mar 2019 07:43:11 GMT

Hi again ken-a

Can you try to add the following to your procedure:

1. Build bootloader

2. In the Application, change the Section Placement Macros, as step 4 in this guide demonstrates, to the following:

FLASH_PH_START=0x0
FLASH_PH_SIZE=0x100000
RAM_PH_START=0x20000000
RAM_PH_SIZE=0x40000
FLASH_START=0x1000
FLASH_SIZE=0xFF000
RAM_START=0x20000008
RAM_SIZE=0x3FFF8

Save and build the Application.

3. Generate settings file.

4. Merge settings file

5. Program bl_and_settings.hex and program the MBR, you find the MBR in the folder: components\softdevice\mbr\nrf52840\hex

6.Generate the DFU packet

7. Do the DFU.

I think the issue you had was that the Application was placed in an area where the MBR or Bootloader had occupied memory:

The Application started on my board after the DFU.

Best regards,

Andreas

RE: USB DFU help

Ken A — Mon, 25 Mar 2019 14:40:32 GMT

Step by step, on NRF52840 DK board

Build bootloader

Verify that it runs when downloaded from Segger Embedded Studio.

Create settings file

nrfutil settings generate --family NRF52840 --application led_softblink_pca10056.hex --application-version 1 --bootloader-version 1 --bl-settings-version 1 settings.hex

Merge files

mergehex -m secure_bootloader_usb_mbr_pca10056.hex settings.hex -o bl_and_settings.hex

Program

nrfjprog -F NRF52 --program bl_and_settings.hex --chiperase

The board comes up with the LED status patterns, showing that the bootloader is running

Create a DFU package

nrfutil pkg generate --hw-version 0 --sd-req 0x00 --application-version 1 --key-file private.key --application led_softblink_pca10056.hex dfu_test.zip

Download the update

nrfutil dfu usb-serial -pkg dfu_test.zip -p COM68

Device programmed

Nothing happens

All steps were executed without errors.

Is the example DFU bootloader incomplete?

RE: USB DFU help

AndreasF — Mon, 25 Mar 2019 06:55:17 GMT

Hi.

You should generate a bootloader settings page also, and merge that with your bootloader.

Best regards,

Andreas