Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  <20092010  2011  2012  2013  2014  2015  2016  2017  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  <20092010  2011  2012  2013  2014  2015  2016  2017 
<== Date ==> <== Thread ==>

Subject: Re: can't initialize record field with string
From: Tim Mooney <mooney@aps.anl.gov>
To: haquin <haquin@ganil.fr>
Cc: tech-talk@aps.anl.gov
Date: Tue, 27 Oct 2009 09:54:25 -0500

haquin wrote:
Hi Tim,

Thank you for your proposal but:
I looked in the genSub record code and I think that what I do should work ... After deeper investigations, it turns out that when I initialize the INPH field type with FTH=STRING or CHAR it is then assigned a CA_LINK type ((*plinkin).type)==CA_LINK instead of CONSTANT ...
That's why the Constant string is not copied at init.

When FTH=LONG then ((*plinkin).type)==CONSTANT

How can I force it to be a CONSTANT

I think the only way to make the link type CONSTANT is to make the
link value entirely numeric.  As I read the code, FTH should have no
effect on the link type, because the EPICS code that makes the decision
doesn't look at anything other than the link value.

Tim Mooney a écrit :
haquin wrote:
Hi,

I initialize the INPH (with macro substitution) of a gensub record with a string,
but it is never transferred to the corresponding H variable ...

in the IOC shell I use the commands:
epics> dbgf MyGensub.INPH
       DBR_STRING:          MyString NPP NMS

epics> dbgf MyGensub.H
       DBR_STRING:

The behaviour is different if I use LONG instead of STRING ...

Can someone tell me how to do retreive MyString in MyGensub.H ?
You can use a stringout record to hold the string, like so:

record(stringout, "myStringInit") {
   field(VAL, "$(MYSTRINGMACRO)")
   field(UDF, "0")
}
record(aSub, "myASub") {
   ....
   field(INPH, "myStringInit")
   ....
}

Then, dbLoadRecords("myDatabase.db", "MYSTRINGMACRO=MyString")



--
Tim Mooney (mooney@aps.anl.gov) (630)252-5417
Beamline Controls & Data Acquisition Group
Advanced Photon Source, Argonne National Lab.

References:
can't initialize record field with string haquin
Re: can't initialize record field with string Tim Mooney
Re: can't initialize record field with string haquin

Navigate by Date:
Prev: Re: can't initialize record field with string haquin
Next: Re: can't initialize record field with string Andrew Johnson
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  <20092010  2011  2012  2013  2014  2015  2016  2017 
Navigate by Thread:
Prev: Re: can't initialize record field with string haquin
Next: Re: can't initialize record field with string Andrew Johnson
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  <20092010  2011  2012  2013  2014  2015  2016  2017 
ANJ, 31 Jan 2014 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·