Issue with latest merging tool

[beemavishnu]

Hello,

 

We are using nRF52840 chip with S140 with ble_app_blinky example.

I was merging Serial DFU bootloader, SoftDevice, application and BLE settings with below commands.

 

• Merge Bootloader and SoftDevice

mergehex -m secure_bootloader_uart_mbr_pca10056.hex s140_nrf52_7.0.1_softdevice.hex -o SecureSerialBoot_SoftDevice.hex

 

• Generate settings hex file.

nrfutil settings generate --family NRF52840 --application ble_app_blinky_pca10056_s140.hex  --application-version 3 --bootloader-version 2 --bl-settings-version 2 --key-file private.key BLE_bl_settings.hex

 

• Merging bootloader, SoftDevice, application and BLE settings

mergehex -m SecureSerialBoot_SoftDevice.hex ble_app_blinky_pca10056_s140.hex BLE_bl_settings.hex -o BLSD_BLE_V5.hex

 

With above commands I am able to flash using nrfjprog successfully. Command line tools was “nRF-Command-Line-Tools_10_5_0_Installer_64.exe”

 

 

But recently I installed latest tool “nRF-Command-Line-Tools_10_12_1_Installer_64.exe” on other PC. With same commands if I generate and flash merged file using nrfjporg, still device is in DFU mode only. Also when I drag final binary into nRF Connect Programmer desktop tool I am getting popup saying overlapped. Also I am seeing different output as highlighted below.

 

 

Please let me know how to fix this issue.

Thanks & Regards

Vishnu Beema

[Vidar Berg]

Hi Vishnu,

There is an unfortunate issue in the current version of mergehex (10.12.x) that can cause the generated output to have some addition bytes appended at the end of the FW image(s) and this cause the boot validation to fail. The recommended solution for now is to use version 10.11.x. We are working on getting a new release out with the fix. Sorry for the confusion.

Best regards,

Vidar