Experimental Physics and
Industrial Control System

Bruce Hill <[email protected]> · Wed, 14 Sep 2011 22:04:58 -0700

I have an application where I'm using aSub to calculate RMS for an array.
It worked fine when I just wanted to generate the RMS value and return it

via VAL. However, when I extended the routine to also calculate MIN

and MAX

and return them via OUT links, I found that if my SNAM routine returns a

non-zero value, it's treated as a status error and aSubRecord.c

suppresses the

updates of the output links.

I'm getting around it by returning zero from my SNAM routine and returning
all my results via OUT link waveforms, but it seems we should either update
the wiki documentation to note this behaviour or modify aSubRecord.c to not
treat the SNAM return value as an error code.

i.e.

--- rec/aSubRecord.c    (revision 7338)
+++ rec/aSubRecord.c    (working copy)
@@ -269,8 +269,7 @@
    }

    if (!status) {
-        status = do_sub(prec);
-        prec->val = status;
+        prec->val = do_sub(prec);
    }

I'm running base version 3.14.12.
Comments welcome.

Thanks,
- Bruce

--
Bruce Hill
Member Technical Staff
SLAC National Accelerator Lab
2575 Sand Hill Road M/S 10
Menlo Park, CA  94025



Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System