Experimental Physics and
Industrial Control System

Korhonen Timo <[email protected]> · Wed, 23 Feb 2005 10:09:50 +0100

Lei Ge wrote:

Hi All,
I'm trying to record the start time and end time of a small application of
mine on timing system. Hardware: EVG-110, IOC MVME5100. Software: Solaris
8, EPICS base 3.13.8, egRecord, erRecord, egeventRecord, ereventRecord,
timestampRecord. The interval between the start time and end time should
be less than 20 milli seconds. But I found that the start time and end
time recorded are always the same, around the booting time of the IOC. The
command 'date' on IOC gives the same time always, too. With this IOC, if I
download other applications without the event system library, the command
'date' works correctly.

So is there something that I may miss setting up? Could anybody give me
some suggestions? 

The present timestamp driver (drvTS) is built so that when it sees that

event system cards are present it silently assumes that you want to use

them for maintaining the time also, unless you explicitly tell it not to
do so. However, the event system has to be set up also before it is

able to deliver the timestamps.

The configuration of the timestamp mechanism is done with the call
TSconfigure in startup script.

To use the event system, you need either to supply timestamp events from
an external clock or configure the EVG to generate them internally.
I attached a document about the current drvTS implementation, with some
comments about my thought to improve it (some time ago.) This is not a
definitive document, so please use it for reference only.

We are in progress of rewriting the drvTS but day-to-day work always

seems to take preference so the progress is not as fast as we would

like. But it is in progress, anyway.
I hope this helps.
Timo
(ps. Ge, I still owe you the example templates. We try to put them
together and send them to you.)
Thank you very much,
Ge

--
Timo Korhonen  PSI (Paul Scherrer Institut)
               CH-5232 Villigen PSI
               tel + 41- 56 3103262  fax + 41 - 56 310 3383
e-mail:	       [email protected]

TSAPI.pdf

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System