Experimental Physics and
Industrial Control System

"Rodney R. Porter" <[email protected]> · Thu, 23 Aug 2007 14:00:59 -0500

Emma, 
This sounds like a bug/feature.  You might try %*[^E] instead of %*[.0-9]
and see if that works.  It looks like your second example is trying to send
2 values to the same PV, which is probably not well defined.  Depending on
how your input can vary, you could also try %*4c or %*i.%*i to skip the
input.  

Personally, when a command is echoed back, I try to match, instead of
skipping, the characters as an added error check.  Usually this means
copying part of your output statement into your input statement.  This is
difficult if the number is a variable, as opposed to a constant.
-- 
Rodney R. Porter

X-Ray Nanoprobe Software Engineer
Advanced Photon Source Sector 26
Center for Nanoscale Materials
Argonne National Laboratory

On 8/23/07 4:29 AM, "Shepherd, EL (Emma)" <[email protected]>
wrote:

> Hi,
> 
> I've been battling with a Streams protocol and thought I would ask for
> some advice from the experts!
> 
> I have the following input from my Streams device: "RC1C0V0.00E2.50"
> 
> Now this is just an echo of a command I have sent so instead of saving
> the information I want to use the * modifier to simply skip the floating
> point numbers, like so:
> 
> in "RC1C0V%*[.0-9]E%*f";
> 
> (NB: I am using a charset instead of %f for the first number since the E
> character could be interpreted as an exponent).
> 
> This doesn't work, and I get the following Streams error:
> 
> 2007/08/23 09:07:49.260 BLXXI-EA-LED-01:CH1SENDOUTPUT: Input
> "RC1C0V0.00E2.50" too short. No match for "E"
> 
> However, if I remove the * modifiers and put field names there instead,
> it works fine:
> 
> in "RC1C0V%(MYRECORD.VAL)[.0-9]E%(MYRECORD.VAL)f";
> 
> If I leave the field name in for the first number and %*f for the second
> I get the following error:
> 
> 2007/08/23 09:25:25.632 BLXXI-EA-LED-01:CH1SENDOUTPUT: Input "2.50" does
> not match format %*f
> 
> 
> Any ideas why I am not able to use the * flag in these cases?
> 
> Thanks,
> 
> Emma
> 
> 
> 
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System