Updating firmware with dfu bootloader

[Geoffroy]

Hi,

i would like to program my module nRF52840 via uart.

I generated private then public key using nrfutil.exe tool

i could programm softdevice and bootloader and flash them on my nRF52840.

I use : https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v11.0.0%2Fbledfu_example_serial.html

now i want to update firmware, first i'm testing an existing package : softdevice_s140.zip (nRF5_SDK_15.0.0_a53641a\examples\dfu\secure_dfu_test_images\uart\nrf52840)

so i try to execute this cmd : 

D:\Work\nRF5_SDK_15.0.0 ble_telechargement_uart\examples\dfu\secure_dfu_test_images>nrfutil.exe dfu serial --package softdevice_s140.zip --port 4 -fc 1 : here is the result : 

D:\Work\nRF5_SDK_15.0.0 ble_telechargement_uart\examples\dfu\secure_dfu_test_images>nrfutil.exe dfu serial --package softdevice_s140.zip --port 4 -fc 1
  [------------------------------------]    0%
Traceback (most recent call last):
  File "nordicsemi\__main__.py", line 987, 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 745, in serial
  File "nordicsemi\__main__.py", line 680, in do_serial
  File "nordicsemi\dfu\dfu.py", line 121, in dfu_send_images
  File "nordicsemi\dfu\dfu.py", line 90, in _dfu_send_image
  File "nordicsemi\dfu\dfu_transport_serial.py", line 200, in open
pc_ble_driver_py.exceptions.NordicSemiException: Serial port could not be opened on {0}. Reason: could not open port '4': WindowsError(2, 'Le fichier sp\xe9cifi\xe9 est introuvable.')
Failed to execute script __main__

on windows device manager , i have  : Jlink CDC UART Port (COM4) and USB Serial Port (COM5), i also tryed with com 5.

what is th correct arg pls ?

[Marjeris Romero]

Hi,

The right documentation page for SDK 15.0.0 will be this one: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.0.0%2Fsdk_app_serial_dfu_bootloader.html&cp=5_5_1_4_3_4

If you are testing using one of the provided packages you need to use the default public key included in the bootloader project, do not use your own generated public key. Because these test packages have been generated using a private key that corresponds to the default public key included the project.

Also make sure the device has enter DFU mode (indicated by LED 3 being lit) before starting the DFU process.

Best regards,

Marjeris

[Geoffroy]

Oh ok thank you very much Marjeris for all those informations !

I'm goiing to restart all process before asking for more details !

[Geoffroy]

can you give me a link to Appendix 1.5 in Hung's blogpost ?

i don' know this blogspot

[Marjeris Romero]

Hi yes, it's the same blogpost I linked to earlier: https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/getting-started-with-nordics-secure-dfu-bootloader

[Geoffroy]

ok thank you, I'll try to use this code...

[Geoffroy]

in my zip, i have a manifest.json, nrf52840.dat and nrf52840.bin

In DFU_SPI_readme.docx (from appendix 1.5), init.dat is mentionned, is it my file named nrf52840.dat (i don't have any file init.dat in my zip)

[Marjeris Romero]

Sorry for the late answer. Yes, nrf52840.dat is the init.dat file. If you open manifest.json you will see which file correspond to bin and dat file.

[Geoffroy]

well protocol isn't correct for my version, I need the one for S140 please

i tryed  to use example code for very simple aurt dfu master.

it is not working

Another question is : I know how to flash my file.bin at an adress

How can i do after flashing my bin so that when i restart bootloader start at this adress to boot with new application ?

[Marjeris Romero]

Hi Geoffroy,

Could you please post these questions in the other case you created instead: https://devzone.nordicsemi.com/f/nordic-q-a/49804/update-my-application-with-uart-from-another-micro-controler

This ticket was about updating firmware on DFU target, not DFU master, and it's tidier if we continue the conversation in your other ticket.

Best regards,

Marjeris