Hi,
i am developing under NCS 3.2.1.
I would like to if there exist a stand-alone command for creating DFU (nrfutil sub-command or similar) instead of https://github.com/nrfconnect/sdk-nrf/blob/v3.2.1/scripts/bootloader/generate_zip.py.
Thank you,
Alessandro
Hi all,
To keep it simple, I will assume the case is for an application with MCUboot as an immutable bootloader.
TL;DR: To manually generate files for DFU, use imgtool.py.
zephyr.signed.bin
To update an application with MCUboot, you need zephyr.signed.bin. This file is automatically generated by our build system, as part of the Output Build Files.
You can generate your own signed binary manually using imgtool.py if you prefer. If you do this, you can start with build/<app>/zephyr.hex, which is your application.
To learn how to upload zephyr.signed.bin to a device to perform DFU, see DevAcademy -> nRF Connect SDK Intermediate -> Lesson 9 on DFU.
dfu_application.zip
Some places you see dfu_application.zip being generated and used, such as in the DevAcademy course for FOTA. However, in this case, dfu_application is not used directly by the SoC. Instead, dfu_application contains zephyr.signed.bin and a manifest json file. The application responsible for the DFU, for example nRF Connect for Mobile or nRF Cloud, will then unzip this file, and DFU the containing zephyr.signed.bin as instructed in the manifest file. This method is useful for more flexible DFU solutions, such as multi image DFU.
The script you refer to is used to generate dfu_application.zip from already signed binary files.
Regards,
Sigurd Hellesvik
You're on the right track, but this rabbit hole has a lot of blind alleys. I was able to download and install Python, but now I'm stuck on finding Pip3. I would really like to find or create a simple Windows app that my customer could use to program a simple hex file via DFU to my target (currently nRF52840, could be 52832 on future products). Just using this for field firmware updates.
In short: Exactly what you are looking for does not exist.
However, you should be able to achieve what you need, but it will require some effort.
longo92 said:.i would expcet that nrfutil embeds those utilities..
nrfutil does not support signing binaries for DFU.
It did support this for the legacy nRF5 SDK bootloader, but not for the nRF Connect SDK. => We can rule out nrfutil as an opetion for a standalone script.
longo92 said:Let’s suppose:
- I need to design, for a client, a hardware/firmware system based on the nRF54.
- During the production phase, the client wants to manage their own private/public keys for firmware signing.
- At each firmware release, I will provide the client with unsigned images.
- The client must then sign the images and create the DFU package independently.
How can they do this without downloading the entire nRF Connect SDK?
This use-case makes sense to me, and why you do not want to have to download the nRF Connect SDK.
imgtool.py is the script you need for this. imgtool has dependencies on python and some pip packages, yes.
However, python and pip packages are common developer tools, and personally I would argue that it is within reason to expect developers to be able to run python scripts.
If you do not want the signer to have to install python or pip packages, you are free to include imgtool.py into a stand-alone tool you make yourself, which matches your requirements. I think for example "pyinstaller" is one tool that could help with this.
PS: I found "pyinstaller" with a web search, so do take this suggestion with a pinch of salt.
EDIT: Also see that imgtool is a standalone package, as longo remarked as a response to this comment.
Referenced as such:
longo92 said:That's fine, in fact imgtool is standlone and can be downloaded as python package:
And a follow-up for Steve:
If you are using Segger, that likely means that you are on the nRF5 SDK.
In this case, you can use nrfutil to generate DFU packages for your application. See nrf5sdk-tools: Generating DFU packages docs
That's fine, in fact imgtool is standlone and can be downloaded as python package:
https://pypi.org/project/imgtool/
Why don't you think to make also https://github.com/nrfconnect/sdk-nrf/blob/v3.2.1/scripts/bootloader/generate_zip.py as stand-alone python package (along with its dependecies)?
Also this one https://github.com/nrfconnect/sdk-nrf/blob/v3.2.1/scripts/generate_psa_key_attributes.py for creating public keyfile would be useful to have as stand-alone pyhon package (need for client to generate the public key file).
You will easily resolve the needs of most users to have such tool, without digging in nrf repository to find that script....
Back at this after a couple days with other distractions. I've read thru the above links, and tried to follow them, but I hit dead ends everywhere. I downloaded nrfutil.exe, but nrfutil list shows me zero commands installed. Where can I download the commands, and why is it a dead end as downloaded?
To clarify, I don't need to DFU a bootloader, nor probably even the softdevice. Both of those will be in the device when shipped. I just need to be able to have a relatively novice user be able to update the application firmware. I should be able to provide an executable and a hex file, or even better, an executable with my hex file embedded, that the user can run to update the application firmware.
Further clarification: The immediate need is for an nRF52840 system, but I also have nRF52832 based systems in the field that could benefit.
Further clarification: The immediate need is for an nRF52840 system, but I also have nRF52832 based systems in the field that could benefit.
SteveHx said:but nrfutil list shows me zero commands installed.
Correct. nrfutil is a tool manager that lets you install multiple tools with it.
Do "nrfutil search" to list alternatives and then "nrfutil install ..." for what you need.
If Im correct and you need nRF5 SDK DFU, you can do
nrfutil install nrf5sdk-tools
and then use "nrfutil nrf5sdk-tools ..." as described in nrf5sdk-tools: Generating DFU packages.
If you need more help with nRF5 SDK DFU, could you open a new ticket for it?
This is because this ticket is originally about nRF Connect SDK DFU, so let's try to not confuse future readers of this ticket.
Since I just downloaded nrfutil.exe in the past week or so, I would expect all required resources to still be available. When I do
nrfutil install nrf5sdk-tools
The response is
Error: Failed to install nrfutil-nrf5sdk-tools
Caused by:
0: Could not download package
1: failed to download from `developer.nordicsemi.com/.../nrfutil-nrf5sdk-tools-x86_64-pc-windows-msvc-1.0.1.tar.gz`
2: failed to get 200 response from `developer.nordicsemi.com/.../nrfutil-nrf5sdk-tools-x86_64-pc-windows-msvc-1.0.1.tar.gz`, got 410
Okay, so let's see what's going on under the hood. Putting that link in my browser (FireFox), yields:
The requested resource
/.pc-tools/nrfutil/nrfutil-nrf5sdk-tools-x86_64-pc-windows-msvc-1.0.1.tar.gz
is no longer available on this server and there is no forwarding address. Please remove all references to this resource.
Also tested with Chrome and Edge, same result.
Any system with so many scattered pieces is bound to lose a few now and then. But where did it go?
SteveHx said:Error: Failed to install nrfutil-nrf5sdk-tools
Could you create a new ticket for this?
This is but one link in a long and winding chain of what should be a very simple process. I do not want to lose the context from above.
To get back to brass tacks: I need a simple utility I can offer to an end user of my product containing an nRF52832 or nRF52840 microcontroller, to allow him to update the application firmware in the device. There should be no need for him to install a whole development environment etc.
SteveHx said:This is but one link in a long and winding chain of what should be a very simple process. I do not want to lose the context from above.
You can link to this ticket, and you can tag me in the new ticket.
Then we will keep the context, and at the same time keep this ticket tidy.
