Re: SNC bug and question

[wright@odin.atdiv.lanl.gov (Rozelle Wright)]

> From frl@aps.anl.gov Fri Jan  9 09:04 MST 1998
> Date: Fri, 9 Jan 1998 10:04:31 -0600
> To: tech-talk@aps.anl.gov
> Subject: SNC bug and question
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> I just discovered the following bug in SNC under epics 3.13:
> 
> The sequence program contains the following "for" statement:
> 
> 
>                 for( i=0, j=0; i<1296; i++) {
>                 
> 
> SNC places the following in the generated *.c file:
> 
> 
>                for (i = 0; i < 1296; i++) {
>                
> 
> Note the j=0 initialization is dropped. Needless to say, nothing good happens
> when a statement such as:
> 
>                FilledBuckets[j++] = i;
>                
> is within the "for" loop;i.e, memory is sequentially trashed as j gets 
> incremented.
> 
> The SNC under epics 3.12 generated the correct c code.
> 
> 
> The question:
> 
> Is there a way to identify unconnected process variables in a sequence
> program without stepping through every channel using seqChanShow? This
> gets pretty laborious when a state program has lots of pv's (100 - 200).
> 
> Frank
> 
Hi Frank,

1. To answer your question first:
Type 
SeqChanShow "< sequence program name>","-"

This will show all the unconnected channels.

This feature is not described in the manual and should be.  I think
I can persuade people here to upgrade the web pages to reflect the
additional feature.

2.  William Lupton is maintaining the sequencer now that Andy Kozubal has
left our group.  I did call Andy and he gave me some idea about where to
look for the problem and I will pass that information onto William.

Rozelle

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|Rozelle Wright              Phone (505) 667-4804       |
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