nrfutil UnicodeDecodeError

[ziming]

HI

    when I use nrfutil.exe to generate .zip file on win10 64bit, I got the UnicodeDecodeError. 

    And :

         Python version 2.7.9 (default, Dec 10 2014, 12:28:03) [MSC v.1500 64 bit (AMD64)] on win32

        nrfutil version 3.3.2.

        SDK 15.3.0

         the example is "\examples\dfu\secure_bootloader\pca10056_uart"

         I use the command is "nrfutil pkg generate --hw-version 52 --application-version 1 --application nrf52840_xxaa.hex --sd-req 0xae --key-file private.key app_dfu_package.zip"

        but I got the UnicodeDecodeError,the error message is :

        

C:\packet>nrfutil pkg generate --hw-version 52 --application-version 1 --application nrf52840_xxaa.hex --sd-req 0xae --key-file private.key app_dfu_package.zip
Traceback (most recent call last):
File "nordicsemi\__main__.py", line 871, in <module>
File "site-packages\click\core.py", line 722, in __call__
File "site-packages\click\core.py", line 697, in main
File "site-packages\click\core.py", line 1066, in invoke
File "site-packages\click\core.py", line 1066, in invoke
File "site-packages\click\core.py", line 895, in invoke
File "site-packages\click\core.py", line 535, in invoke
File "nordicsemi\__main__.py", line 580, in generate
File "nordicsemi\dfu\package.py", line 339, in generate_package
File "nordicsemi\dfu\package.py", line 486, in normalize_firmware_to_bin
File "ntpath.py", line 85, in join
UnicodeDecodeError: 'ascii' codec can't decode byte 0xcd in position 7: ordinal not in range(128)
Failed to execute script __main__

C:\packet>

The "packet" folder only two files : nrf52840_xxaa.hex and private.key

I refer to the Nordic blog ：https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/getting-started-with-nordics-secure-dfu-bootloader.

How should I solve this problem?

[bjorn-spockeli]

Did you install nrfutil using pip or are you using the nrfutil.exe from https://github.com/NordicSemiconductor/pc-nrfutil/releases?

[ziming]

I have solved the problem.

This is the problem with python2.7，it default encoding is ASCII,Change the encoding mode to GBK.

But I ran into another problem when I was using the DFU USB upgrade.

I use the command is "nrfutil dfu usb-serial -pkg .\app_dfu_package.zip -p COM8",

It return "NordicSemiException: Extended Error 0x07: The array of supported SoftDevices for the update does not contain the FWID of the current SoftDevice". But i don`t use softdevice,My application only uses a Master Boot Record (MBR).

Can you help me how should I solve this problem?  

[bjorn-spockeli]

Which --sd-req did you set when you generated the app_dfu_package.zip using nrfutil? Try using 0xFFFE.

[ziming]

--sd-req I used 0xb6,and after I burned SoftDevice to the chip, the upgrade was successful.But i don`t use softdevice,My application only uses a Master Boot Record (MBR).

I want to know Can I upgrade without SoftDevice ? 

What should I do if I can？

I try using --sd-req 0xFFFE when I generated the app_dfu_package.zip,and the device don`t have SoftDevice.

The generated command is "nrfutil pkg generate --hw-version 52 --application-version 1 --application nrf52840_xxaa.hex --sd-req 0xFFFE --key-file private.key app_dfu_package.zip"

I use "nrfutil dfu usb-serial -pkg .\app_dfu_package.zip -p COM8" to upgrade,but It still returns NordicSemiException: Extended Error 0x07: The array of supported SoftDevices for the update does not contain the FWID of the current SoftDevice.

[bjorn-spockeli]

If the SD is present on the device, then you need to use the --sd-req that is identical to the SD that you flashed to the chip. WHich SD version did you flash?

Best regards

Bjørn

[ziming]

Without SD on the device.    My application only uses a Master Boot Record (MBR).

I want to know Can I upgrade device without SoftDevice ? 

What should I do if I can？

[bjorn-spockeli]

Hi Ziming, 

It appears that its not possible to generate a firmware image using nrfutil without specifying the -sd-req. So you will have to either have a SD present on the device or include a SD in the image. 

So your application is not using the RADIO in the nRF52840 at all?

Best regards

Bjørn