Experimental Physics and
Industrial Control System

You can set
extraInput = Ignore
and that will discard everything after the bit you are interested in.

It will depend the format of the value part of the message.
If say it was a decimal integer then you could read it
with a protocol:
in "OK:%d,"
or extract the checksum with:
in "OK:%*d,%x"

A variable length string would be more difficult.

Pete

> -----Original Message-----
> From: Phillip Sorensen [mailto:[email protected]]
> Sent: 29 January 2007 17:06
> To: TechTalk EPICS
> Subject: StreamDevice and checksum
> 
> 
> Hello,
> 
> I am trying to get a device working with StreamDevice 2-1.  My device 
> returns a message in the form of "OK:value,checksum".  The 
> checksum is 
> only for the value part of the message.  I am able to skip 
> the "OK:" by 
> using the width field, but trying to use the precision filed 
> to skip the 
> "," between the value and checksum gives an error about not 
> being able 
> to use the precision field.
> 
> Is there a way to tell the parser to skip the ","?
> 
> Phil Sorensen
> CHESS
> 
> 
> 

Replies:

RE: StreamDevice and checksum Denison, PN (Peter)

References:

StreamDevice and checksum Phillip Sorensen

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