CAN FD

Has anyone here had a chance to look into CAN FD yet?

I would like to know exactly what the header of the CAN frame looks like and whether a specific protocol is required. Could you, for example, operate a CAN FD node in a CAN 2.0b network, or does this lead to problems due to the different headers?

[url][/url]https://en.wikipedia.org/wiki/CAN_FD{MARKER}

Hi,

I took a look at it and then described it as follows:
http://www.obd.wiki/can

As far as I can see, the arbitration process proceeds normally, and only the data portion switches to a higher bitrate.
However, I assume that existing CAN hardware is not compatible with this, and that high-speed and CAN-FD devices cannot be mixed within the same bus.

Best regards, Rainer.

Okay, my previous post was removed by ADMIN because they said I did not respect copyright. Well, here is all you need to know about CAN FD. There is no copyright infringement here. Enjoy.

http://www.bosch-semiconductors.de/en/automotive_electronics/homepage_2/startpage_2015.html

Hello,

I would like to inquire about the progress of the planning for CAN-FD support. For my project, I need an interface that will also allow me to detect and identify new vehicles.

Best regards,

Tobi.

Hi Tobias,

CAN-FD requires completely new hardware to be truly effective.

Is there a need for it? Feedback from other readers is welcome.

Best regards, Rainer.

I have been working with CAN FD for quite some time now. However, lacking alternatives, it features hardware from Peak.

Hello everyone,
I had the opportunity last week to sniff the CAN bus of a new Golf 8.
It was a 1.5L gasoline engine, which was also available in the Golf 7, but here, CAN FD is used.
The hardware was from Peak, and the new interface was from Vector.

Did you need to specify any particular parameters for logging, or did the logger adapt itself?

With CAN, there's no automatic bitrate or anything like that; you have to set it yourself.

I think he's referring to Autobaud. That's a feature in Vector or Peak software where the baud rate is automatically detected. It only needs to be configured whether it's CAN 2.0 or CAN FD, and then the parameters will be automatically adjusted until no more stuff bits are received.

With CAN FD, it's even simpler because the frequency limits the possible baud rates that can be used.

Hello,

Okay! Perhaps in a new hardware revision with CAN-FD. Now I need to check which hardware components are available for the long term. It's pointless to build something new and great when the integrated circuits cost a fortune and have a 1-year delivery time... X‍♀️

Best regards, Rainer.

Blade2k8 wrote:

Did you need to specify any particular parameters for logging, or did the logger adapt itself?

If you don't know the baud rate and payload settings, you'll have to experiment a bit, but nothing will likely break.

Most OEMs use 500 kbps and 2 Mbps with CAN FD.
Vector or Peak have the ability to sniff the bus and measure the baud rate.

Hello everyone,
As part of my doctoral research, I am working with CAN FD and I am looking for CAN FD log files. Do you have any sources for that?
Thank you and best regards.

Perhaps you could specify more precisely what type of log file you need. Message-oriented or signal-oriented (MDF4 V1?) and which operating system (AUTOSAR, FIBEX, etc.)? Do you need a trace or a logger log?

Defining that is a bit more difficult with CAN FD. "A simple request like 'I need a log file' is not enough."

Hello Postman,
Thank you for the response. What is the difference between a trace and a logger log? I would like to have a recording of the bus communication, and the "content" is not important to me at this stage, so I don't need to know what signals are contained in the messages.
Therefore, it's likely that your wording is message-oriented.
I want to use it to evaluate a CAN-FD simulation, so I'm more interested in the timing of the messages.
The OS would then likely be the simulation to be evaluated, and the data could be provided in the simplest format as a CSV or TXT file.

Am I completely missing something right now?