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

[Vincent MAILHOL]

On Tue. 12 Jan 2021 at 11:14, Richard Cochran <richardcochran@xxxxxxxxx> wrote:
>
> On Tue, Jan 12, 2021 at 09:00:33AM +0900, Vincent MAILHOL wrote:
> > 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