RE: Setting an IOC clock from the vxWorks shell

["Thompson, David H." <thompsondh@ornl.gov>]

Timo, Sheng Peng, and I have been collaborating on a package that loads onto an IOC that may help you.  It replaces the NTP client in iocClock with a system that provides for multiple time providers on an IOC, one of which is the vxWorks clock.  The vxWorks clock is set periodically when NTP or a better time provider is available.  It supports hardware timing systems as well.   One of the things it does is fall back to internal timekeeping if the NTP server fails, all transparently.

 

You can get it at http://ics-web1.sns.ornl.gov/share/generalTime.tar.gz.

 

There were presentations on it at the APS and SLAC EPICS meetings.

 

 

---

From: J. Frederick Bartlett [mailto:bartlett@fnal.gov]
Sent: Monday, February 26, 2007 6:25 PM
To: tech-talk
Subject: Setting an IOC clock from the vxWorks shell

 

  Recently we have been having problems with IOC timestamp synchronization on our EPICS network. The timing master  is unable to obtain timing information from our ntp server -- see Geoff Savage's techtalk note on 15 Feb 2007. While we are finding the solution to that problem, I would like to make one of our IOC's a timing master and set its clock to approximately the correct time. Does anyone know of a method of setting the IOC's clock from the vxWorks shell?

Fritz

-- 

J. Frederick Bartlett

Fermi National Accelerator Laboratory

D0 Experiment/Online Systems and Controls

bartlett@fnal.gov

630-840-4058