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Subject: |
Fast data logging |
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From: |
[email protected] |
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Date: |
Mon, 1 Aug 1994 11:28:11 -0700 |
Dear all,
I am looking at archiving data from hardware systems at fast rates: 200Hz
or so. The following are some thoughts I've had about it and I wonder if
anyone else is also dealing with this issue.
I don't I would want to drive the logging at 200Hz via normal record processing.
What I had in mind was to have the record associated with the data create a
standalone VxWorks task at init_record() which would be responsible for
the communication with the device in question (PMAC?) at the 200Hz rate and store
it in an internal circular buffer.
>From the EPICS record processing point of view the record could be queried at
a slow rate via the normal EPICS scan task mechanism and the resulting array
sent out to AR via channel access.
Pergrine
_______________________________________________________________________________
Peregrine M. McGehee Controls Group
Gemini 8-Meter Telescopes Project PO Box 26732, Tucson, AZ 85726-2632
E-mail: [email protected] Phone: (602) 321-3423
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