Experimental Physics and
Industrial Control System

Zimoch Dirk via Tech-talk <tech-talk at aps.anl.gov> · Wed, 17 Apr 2024 05:26:21 +0000

Hello Pierrick,

StreamDevice uses Separator only for array records (waveform, aai, aao). There, it reads alternating the format and the separator. But the format %s only stops at a space, not at your separator. Thus, the first %s gets the complete string and there is no separator left to read. Here, with redirections to multiple scalar records, the Separator is not used at all. Still the %s consumes as much as it can, that is everything.
What you need is %[^,] instead of %s (that reads strings up to comma) and explicit commas in between:
in  "%(\$1:G1Name)[^,],%(\$1:G2Name)[^,], %(\$1:G3Name)[^,],%(\$1:G4Name)[^,]";

Also, one of the formats (I suggest the last) can be without redirection if the corresponding G*Name record (G4 in this case) is the one which calls this protocol.

Best regards,
Dirk

> Am 17.04.2024 um 01:24 schrieb Pierrick M Hanlet via Tech-talk <tech-talk at aps.anl.gov>:
> 
> Hi all,
> I'm on a linux box with AL9.3, base 7.07, and StreamDevice 2.8.24.
> I have a string input, which the controller gives as: A1,A2,B1,B2.
> I want to read them individually as separate names, i.e. separate records.
> 
> My protocol is:
> get_names {
>     separator=",";
>     out "CID";
>     in  "%(\$1:G1Name)s%(\$1:G2Name)s%(\$1:G3Name)s%(\$1:G4Name)s";
> }
> 
> although, I've also tried as:
> get_names {
>     separator=",";
>     out "CID";
>     in "%(\$1:G1Name)s,%(\$1:G2Name)s,%(\$1:G3Name)s,%(\$1:G4Name)s";
> }
> 
> or as:
> get_names {
>     out "CID";
>     in "%(\$1:G1Name)s,%(\$1:G2Name)s,%(\$1:G3Name)s,%(\$1:G4Name)s";
> }
> 
> Of course, it works perfectly if I have:
> get_names {
>     out "CID";
>     in "%(\$1:G1Name)2c,%(\$1:G2Name)2c,%(\$1:G3Name)2c,%(\$1:G4Name)2c";
> }
> However, the name can be up to 8 characters long.
> 
> I don't understand why separator doesn't work as I'm using it.
> Thank you,
> Pierrick
> 
> 
> -- 
> Pierrick Hanlet
> Fermi National Accelerator
> Accelerator Front End Controls
> +1-630-840-5555 -- lab
> +1-312-687-4980 -- mobile
> 
> "Whether you think you can or think you can't, you're right" -- Henry Ford
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System