not able to enter DFU Mode with secure bootloader example

[Aadishri GS]

I am not able to enter DFU Mode with secure bootloader example.

I use IAR and NRF Connect with Programmer to flash

Following are the steps I followed

1. Build Secure bootloader for serial UART ( enabled NRF_DFU_DEBUG_VERSION to remove link error)

2. Build blinky with MBR

3. Create settings file for blinky with MBR using the following command:

nrfutil settings generate --family NRF52840 --application blinky_pca10056_mbr.hex --application-version 1 --bootloader-version 1 --bl-settings-version 1 settings.hex

Note: Generating a DFU settings page with backup page included.
This is only required for bootloaders from nRF5 SDK 15.1 and newer.
If you want to skip backup page generation, use --no-backup option.

Generated Bootloader DFU settings .hex file and stored it in: settings.hex

Bootloader DFU Settings:
* File: settings.hex
* Family: NRF52840
* Start Address: 0x000FF000
* CRC: 0x5BBAFFAB
* Settings Version: 0x00000001 (1)
* App Version: 0x00000001 (1)
* Bootloader Version: 0x00000001 (1)
* Bank Layout: 0x00000000
* Current Bank: 0x00000000
* Application Size: 0x00000608 (1544 bytes)
* Application CRC: 0xA6B0AE53
* Bank0 Bank Code: 0x00000001
* Softdevice Size: 0x00000000 (0 bytes)
* Boot Validation CRC: 0x00000000
* SD Boot Validation Type: 0x00000000 (0)
* App Boot Validation Type: 0x00000000 (0)

4. I then used the NRF Connect to program 4 files: settings, blinky_mbr, secure bootloader and mbr(mbr taken from test image folder)

Observation:
1. The blinky app runs normally
2. If I hold down button 4 and power-cycle, LEDs 1 and 3 are lit.After sometime, normal mode where app runs is entered and the app runs

I guess there is a hardfault and DFU mode is not entered. Instead after some time, maybe due to watchdog reset, normal app runs. I am unable to understand what I am missing here

Queries:
1. How to enter DFU mode?
2. Is it OK to use nrf Connect programmer to program all at once
3. How to enable RTT / UART logs on IAR? In the sdk_config file, I only see NRF_LOG_ENABLED. No macros related to UART / RTT

Note that I just want to check getting into bootloader mode as a first step and it is not working. Hence not getting into creating my own private -public key-pair

[Einar Thorsrud]

Hi,

You have not specified clearly which bootloader example and transport layer you use for DFU. Can you clarify? If you use the BLE bootloader, then you must also program the SoftDevice, which is used to handle BLE communication.

[Aadishri GS]

I use Secure bootloader and UART

[Aadishri GS]

190503.zip

[Aadishri GS]

I just saw that the HW version was not matching. I made it to 0 in my bootloader code and it successfully updated!!

Below is the command I used:

Code\nRF_OriginalSDK\nRF5_SDK_15.3.0_59ac345_TRY\BUILDS\190503\dfu>nrfutil dfu serial -pkg dfu_test.zip -p COM5 -b 115200 -fc 1

Traceback (most recent call last):
File "C:\Python27\Scripts\nrfutil-script.py", line 9, in <module>
load_entry_point('nrfutil==5.2.0', 'console_scripts', 'nrfutil')()
File "c:\python27\lib\site-packages\click\core.py", line 764, in __call__
return self.main(*args, **kwargs)
File "c:\python27\lib\site-packages\click\core.py", line 717, in main
rv = self.invoke(ctx)
File "c:\python27\lib\site-packages\click\core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "c:\python27\lib\site-packages\click\core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "c:\python27\lib\site-packages\click\core.py", line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "c:\python27\lib\site-packages\click\core.py", line 555, in invoke
return callback(*args, **kwargs)
File "c:\python27\lib\site-packages\nordicsemi\__main__.py", line 1042, in serial
timeout)
File "c:\python27\lib\site-packages\nordicsemi\__main__.py", line 956, in do_serial
dfu.dfu_send_images()
File "c:\python27\lib\site-packages\nordicsemi\dfu\dfu.py", line 129, in dfu_send_images
self._dfu_send_image(self.manifest.application)
File "c:\python27\lib\site-packages\nordicsemi\dfu\dfu.py", line 97, in _dfu_send_image
self.dfu_transport.send_init_packet(data)
File "c:\python27\lib\site-packages\nordicsemi\dfu\dfu_transport_serial.py", line 256, in send_init_packet
self.__execute()
File "c:\python27\lib\site-packages\nordicsemi\dfu\dfu_transport_serial.py", line 421, in __execute
self.__get_response(DfuTransportSerial.OP_CODE['Execute'])
File "c:\python27\lib\site-packages\nordicsemi\dfu\dfu_transport_serial.py", line 502, in __get_response
raise NordicSemiException('Extended Error 0x{:02X}: {}'.format(resp[3], data))
pc_ble_driver_py.exceptions.NordicSemiException: Extended Error 0x06: The hardware version of the device does not match the required hardware version for the update.

Code\nRF_OriginalSDK\nRF5_SDK_15.3.0_59ac345_TRY\BUILDS\190503\dfu>nrfutil dfu serial -pkg dfu_test.zip -p COM5 -b 115200 -fc 1
[####################################] 100%
Device programmed.

Tips for those who face similar issues:

1. The command I used to create package:

nrfutil pkg generate --hw-version 0 --sd-req 0x00 --application-version 1 --key-file private.key –application blinky_pca10056_mbr_new.hex dfu_test.zip

2. The command I used to generate the bootloader_settings file:

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

I have uploaded the updated secure bootloader hex with HW version 0 instead of the default 52 in the sdk_config.h

secure_bootloader_uart_mbr_pca10056.hex

3. I installed Python 2.7.11.

    3.7 version should not be installed. nrfutil version was 5.2.0

4. Connect all UART Pins: RX 8, TX 6, CTS 7, RTS 5, GND and VCC

5. Don't forget to add MBR and Booloader_settngs file apart from the app and booloader hex. Total 4 files

6. Use the new nRF Connect-Programmer

[Aadishri GS]

Also, LEDs 1 and 3 glow indicating the board has entered Bootloader mode