Subject: |
Re: GPIB driver |
From: |
[email protected] (Carl Timmer) |
Date: |
Wed, 4 May 94 16:03:55 MDT |
To those of you doing GPIB:
There is a problem that surfaced recently concerning the NI 1014D
gpib board. When doing DMA data reads (i.e. reading waveforms
from a Tektronix digitzer), bus errors were mysteriously generated.
It turns out that some changes to the "drvGpib.c" code would be advisable.
In the "niPhysIo" routine, there are two lines,
b->ch0.ccr = D_SRT;
b->imr2 = w_imr2; /* this must be done last */
between which there should be a time delay. Apparently, the gpib board is
in occasional violation of the VME standard and the attempt to write to
interrupt mask register 2 (I believe) fails. I have a fix which also allows
one to fix & debug the situation. If interested, send me email and I'll send a
revised copy of "drvGpib.c" .
This correction will be included into the next release of EPICS.
Carl Timmer
- Navigate by Date:
- Prev:
Re: Portable CA server? winans
- Next:
AVME9440 Ned Arnold
- Index:
<1994>
1995
1996
1997
1998
1999
2000
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: Portable CA server? winans
- Next:
AVME9440 Ned Arnold
- Index:
<1994>
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
|