Experimental Physics and
Industrial Control System

Emmanuel Mayssat <[email protected]> · Wed, 16 Nov 2005 11:31:33 -0800

I am actually doing something quite similar, but I am using a standard
camera with a frame grabber.
The issue I am facing is related to synchronization and data processing.

For example I calculate the x and y profiles of a electron beam.
But while I can acquire image at 30Hz, epics can only process the
information at a maximum rate of 10Hz.

Is there a work around?
Is it possible to do real time video with epics?

n Wed, 2005-11-16 at 13:44 +0100, Aladwan Ahed wrote:
> Hi Matjaz,
> 
> At the SLS we interfaced CCD cameras with Firewire bus to EPICS (3.14.7 on Linux RH7.3), you can find all the info and the source code under:
> 
> http://epics.web.psi.ch/software/firewire/
> 
> We think Firewire is a good choice as it supports isochronous data - delivering data at a guaranteed rate. This makes it ideal for devices that need to transfer high priority data in real-time, such as video devices. It is also fast (400Mbit/sec) (53 frames/sec @ 1Byte and 1024*768 pixels and 80% usable bandwidth), actually, this is more than what the EPICS video server PC can process. The EPICS video server grabs the frames from the camera, process them, and then allow any CA enabled client application to access the processed data, this way we save our network bandwidth.
> 
> Cheers,
> Ahed
> 
> ###########################################
> # Ahed Aladwan                            
> # SLS Controls / Paul Scherrer Institute  
> # WSLA/208, 5232 Villigen PSI Switzerland 
> # Tel:+41 56 310 4594                     
> # Fax:+41 56 310 4413                     
> # www.psi.ch                                                             
> # http://people.web.psi.ch/adwan/                   
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-- 
Emmanuel Mayssat
Cell: 650/793-0626
Lyncean Technologies, Inc.
"See the invisible"

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System