BLE Bootloader FDU Example Verification Error

[AndrewJKnowles]

Hi, 

I am looking into adding BLE OTA firmware update functionality and started by exploring the example provided in Nordic SDK (SDK v16.0.0) while following the documentation provided here.

I ensure that the BLE Secure DFU Bootloader (from examples\dfu\secure_bootloader\pca10056_s140_ble\arm5_no_packs) and the softdevice are programmed, before attempting to program the pre compiled dfu example hex file "sd_s140_bootloader_buttonless_with_setting_page_dfu_secure_ble_debug_without_bonds" via nrfjprog. After a successful programming stage, the verification fails with unexpected values in particular addresses (see below).  

I was wondering how to rectify this issue while using the precompiled hex files to demonstrate FDU as proof of concept.

I am currently using:

• SDK v16.0.0 (though v17.1.0 sees to share the same issue)
• nRF52 Development board (DVK-BL654)
• CMD Prompt tools:
  • 
• J-Link version 11.0.16.1

Please also find the attached hex and log files.

sd_s140_bootloader_buttonless_with_setting_page_dfu_secure_ble_debug_without_bonds.hex0207.log.log

Thank you.

[Einar Thorsrud]

Hi,

Have you made sure that the flash is erased before you try to program it? If it is not, that could explain the mismatch. Try adding "--recover" to the nrfjprog command you use, or do an "nrfjprog --recover" separately before this step.

[AndrewJKnowles]

Hi Einar,

Ive successfully programmed the development board using:

However, when i power cycle the board. All LEDs are solidly illuminated which according to this table:

indicates that either BSP_INDICATE_FATAL_ERROR or BSP_INDICATE_USER_STATE_3 or BSP_INDICATE_USER_STATE_ON. When using the mobile app nRF Toolbox, the device name "Nordic_Buttonless'" cannot be seen so i think it may be a fatal error. I have tried this on two different BL654 dev boards, both respond with the same led behaviour.

Running the command again with --log provides the following log file.

7585.log.log

[Einar Thorsrud]

Hi,

Yes, that indicate a fatal error. Have you checked which error occured? One way to find out is to make a debug build (define DEBUG for the project) and enable logging, and observe the log output. Then you should see the file name and line number and error code. Alternatively, check with a debugger (then you should also disable optimization).