not able to enter DFU Mode with secure bootloader example

Question

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

Aadishri GS · Accepted Answer

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
RF_OriginalSDK
RF5_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
rfutil-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
ordicsemi\__main__.py", line 1042, in serial timeout) File "c:\python27\lib\site-packages
ordicsemi\__main__.py", line 956, in do_serial dfu.dfu_send_images() File "c:\python27\lib\site-packages
ordicsemi\dfu\dfu.py", line 129, in dfu_send_images self._dfu_send_image(self.manifest.application) File "c:\python27\lib\site-packages
ordicsemi\dfu\dfu.py", line 97, in _dfu_send_image self.dfu_transport.send_init_packet(data) File "c:\python27\lib\site-packages
ordicsemi\dfu\dfu_transport_serial.py", line 256, in send_init_packet self.__execute() File "c:\python27\lib\site-packages
ordicsemi\dfu\dfu_transport_serial.py", line 421, in __execute self.__get_response(DfuTransportSerial.OP_CODE['Execute']) File "c:\python27\lib\site-packages
ordicsemi\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
RF_OriginalSDK
RF5_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 &ndash;application blinky_pca10056_mbr_new.hex dfu_test.zip 
 2. T he 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

not able to enter DFU Mode with secure bootloader example

Top Replies