Re: [PATCH v3 1/1] can: dev: add software tx timestamps

On Tue. 12 Jan 2021 at 11:14, Richard Cochran [off-list ref] wrote:

On Tue, Jan 12, 2021 at 09:00:33AM +0900, Vincent MAILHOL wrote:

quoted

Out of curiosity, which programs do you use? I guess wireshark
but please let me know if you use any other programs (I just use
to write a small C program to do the stuff).

I was thinking of PTP over DeviceNET (which, in turn, is over CAN).
This is specified in Annex G of IEEE 1588.

The linuxptp stack has modular design and could one day support
DeviceNET.  It would be much easier for linuxptp if CAN interfaces
support hardware time stamping in the same way as other network
interfaces.

I actually also thought of implementing PTP but for a slightly
different goal: synchronise the clock of the different CAN
controllers connected to a same Linux host. But so far, it is
just a rough idea and I never looked really deep into the
technical details of linuxptp.

However, I did not know about DeviceNET. I am not really aware of
the use cases for industrial automation applications.

Glad to have asked, learnt something :)


Yours sincerely,
Vincent