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<== Date ==> <== Thread ==>
Subject: StreamDevice protocol file question
From: "Wang, Andrew via Tech-talk" <tech-talk at aps.anl.gov>
To: EPICS tech-talk <tech-talk at aps.anl.gov>
Date: Fri, 30 Jul 2021 14:22:07 +0000
All,

Quick question about the protocol file in StreamDevice. Suppose I have an instrument where after I send a command to change one of its attributes, it responds back with a status of either  OK or BAD. Furthermore, I have an analog output record, whose value is used by a protocol file. 

If I want to properly flush the status response, what is the preferred method of doing so, especially since the status response is a string, not a scaler value.

What I’m currently doing in the protocol is this:

setProp
{
       out “set %f”;
       in “”;
}

What is weird is that I am not getting a mismatch error, and it does seem like I am properly flushing the input with that method.

After looking at other code, Is it better to do this?

setProp
{
       out “set %f”;
       in “%*s”; # or this “%*f”;
}

Thanks!
Andy
Replies:
Re: StreamDevice protocol file question Zimoch Dirk (PSI) via Tech-talk
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