EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  <19992000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  <19992000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: Re: XY566
From: [email protected] (Bob Dalesio)
To: [email protected], [email protected]
Date: Wed, 24 Nov 1999 06:42:06 -0700
With the disclaimer - as I recall:

The waveform version of the card was a very special application that needed
a homemade piece of hardware to generate the gating signals - therefore it
looks for the xy085 card which is a xycom prototyping card. This mode should
no longer be supported.

The other two modes were scanned and latched. In the first case the board was
set up to free scan the I/O with the EPICS database reading the most recent
value whenever the board was scanned. In the latched case, an external trigger
is used to gate in the analog signals and initiate the A/D conversion. As we 
had external timing boards with programmable delays, we did not take advantage
of the internal delays on the board, we required a much higher resolution on the
delay as well.

If you really want me to, I will dig up the manual and read about the 0x95a5.
My inclination is to say - do it as seems best. I can look into this further
when I have a manual in my possession again.

Except for the initialization, this board is very straight forward. In your new driver,
will you support the array mode for each channel or some set number of channels? As
I recall, several folks are using thsi board to take slower arrays. In the initial
implementation of this, I only support one channel. It would be better if the general
driver supported the maximum rate for reading all of the channels.

Have fun,
	Bob


Navigate by Date:
Prev: XY566 Nick Rees
Next: Re: EPICS drivers for PLCs? Bill Brown
Index: 1994  1995  1996  1997  1998  <19992000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Re: motor record v3.4 - home speed Ron Sluiter
Next: Problem with calc record Dennis M Reichhold
Index: 1994  1995  1996  1997  1998  <19992000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 10 Aug 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·