Experimental Physics and
Industrial Control System
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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: Can RTEMS IOC act as IEEE 1588 clients? |
| From: | Diego Sanz <[email protected]> |
| To: | "Konrad, Martin" <[email protected]> |
| Cc: | EPICS Tech Talk <[email protected]> |
| Date: | Thu, 12 Mar 2015 18:56:01 +0100 |
Hi Martin, let me explain you some issues concerning your doubts.
Several years ago I modified the open source ptp for Linux version, to be used with RTEMS into an specific board with a coldfire V2 and an specific PHY that permits hardware timestamps compliant with PTP v1 and V2. So, it is possible to use PTP with RTEMS. Depending which clock source you want for synchronizing the ptp, you should modify the PTP src code accordingly to do it.
About PTP for EPICS, I suppose you mean EPICS for RTEMS, I don't know if it is implemented. To do it, a lot of options could be done, but to do it independently of the hardware architecture (and without hardware timestamping), it should be interesting to implement an EPICS device support for it.
Regards!
Diego
2015-03-12 18:16 GMT+01:00 Konrad, Martin <[email protected]>:
Hi,
on POSIX machines we can run a PTP client of our choice that
synchronizes the OS clock and let general time get the time from the OS.
On a single-board computer running RTEMS this is a different story:
RTEMS does not seem to support IEEE 1588. Is PTP support for EPICS
available? Can anyone share some experience on this?
Thanks,
Martin
P.S.: The precision we are shooting for is ~100 us so a pure software
implementation should do the job.
--
Martin Konrad
Control System Engineer
Facility for Rare Isotope Beams
Michigan State University
640 South Shaw Lane
East Lansing, MI 48824-1321, USA
Tel. 517-908-7253
Email: [email protected]
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- Can RTEMS IOC act as IEEE 1588 clients? Konrad, Martin
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