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<== Date ==> <== Thread ==>

Subject: Re: EDM display update rate
From: "Sinclair, John William" <sinclairjw@ornl.gov>
To: "jon@u.washington.edu" <jon@u.washington.edu>, "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Sat, 24 Oct 2015 01:33:01 +0000
You may check the box labeled ³fast update² (or something similar) in the
text control properties. You may also want to experiment with the display
property labeled ³use pixmap². Setting it to ³always² turns on double
buffering which makes things look better for busy updates.

On 10/23/15, 7:44 PM, "tech-talk-bounces@aps.anl.gov on behalf of
jon@u.washington.edu" <tech-talk-bounces@aps.anl.gov on behalf of
jon@u.washington.edu> wrote:

>
>
>We notice that EDM updates the screen about twice per second.  For
>example, using a text control to display a calc record whose VAL
>increments 10 times a second shows the count incrementing by five
>units every half-second.
>
>It seems this rate was chosen deliberately. My colleague Stefani Banerian
>found this message:
>http://www.aps.anl.gov/epics/tech-talk/2009/msg00415.php
>which says "the intention was to check each display about twice per
>second".
>She also found these lines in edmMain/main.cc:
>
> main.cc:1566:  stat = thread_create_handle( &delayH, NULL );
> main.cc:1775:      thread_delay( delayH, 0.5 );
>
>We would like to increase the update rate to 5/sec or so.  Is any way
>to achieve this without changing source code and rebuilding EDM?
>
>(This is for simple displays with text controls showing only seven PVs,
>where just one at a time is changing.  These would replace hard-wired
>LED displays.)
>
>Jon Jacky
>
>



Replies:
Re: EDM display update rate jon
References:
EDM display update rate jon

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