EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  <20072008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  <20072008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: Re: firewire video on RTEMS-4.6.x-MVME5500
From: Kate Feng <[email protected]>
To: Daron Chabot <[email protected]>, [email protected], [email protected]
Date: Wed, 10 Oct 2007 11:17:28 -0400
Daron Chabot wrote:
Sorry for not being more clear: I am only interested in the EPICS and EDM applications you've created for displaying the video, not in any of the RTEMS-related code.
I did not change any EDM applications or EPICS base.  The protocol
is CA.   The optimization is implemented at RTEMS device driver
and IIDC1394 library layers. The BSP is RTEMS-MVME5500.
The driver does not have to be linked to EPICS.
It is just another real-time application with the RTEMS-MVME5500
BSP.  It
triggers the camera at 30 fps and  display at 30Hz
simultaneously
for the 1024x768x8bit mode (video mode) even under the
limited 100MHz network
bandwidth and indeterministic network environment.
Yes,  in the 100MHz NIC, the actual network throughput is not
30Hzx1024x768x8 bits. But it is greater than 10Hz.  Thus, the system does
not have to run in a private network.
I do not believe it
will  be slower with a non-EPICS application. 

Here at the CLS we're using linux-based soft IOCs to communicate with Flea and Flea2 cameras.
 
We're having difficulty in achieving video frame rates greater than about 10 Hz at 640x480 resolution. I'm interested to know how you are getting such fine performance (aside from using RTEMS :-) ).
 

Perhaps I will have the optimization written in a publication, so that
hopefully it can help the Linux or vxWorks users.  If so,  will you
feedback to this list regarding how much improvement you achieved
in the Linux driver ?

Regards,
Kate

Replies:
RE: firewire video on RTEMS-4.6.x-MVME5500 Mark Rivers

Navigate by Date:
Prev: Re: CAMAC IO Luedeke Andreas
Next: RE: firewire video on RTEMS-4.6.x-MVME5500 Mark Rivers
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  <20072008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Re: firewire video on RTEMS-4.6.x-MVME5500 Kate Feng
Next: RE: firewire video on RTEMS-4.6.x-MVME5500 Mark Rivers
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  <20072008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 10 Nov 2011 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·