Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Sat, 28 Feb 2015 00:54:40 +0000

I think STAT and SEVR only get set when the record processes.

When are you doing the callback to device support, before or after iocInit?

If you do the callback after iocInit then the callback will cause the record to process, because it calls scanOnce().  However, if you call it before iocInit it will not call scanOnce() because that will crash the IOC.

Are you using the asynPortDriver C++ base class?  If so that takes care of the problem for you because it has a thread that waits for interruptAccept to be true, and then does all of the callbacks to device support. 

Mark

-----Original Message-----
From: Zenon Szalata [mailto:[email protected]] 
Sent: Friday, February 27, 2015 5:59 PM
To: Mark Rivers; [email protected]
Subject: asyn R4.26

Hi Mark,
I am beginning to use asyn R4.26, where the new feature that you have 
added to allow initialization of output records, is of interest.
It works well, except I have noticed one thing.
In my case I am initializing a longout record from the device driver.  
It gets the value correctly, UDF is set to 0 but STAT has UDF and SEVR 
is INVALID.  Do I need to do something else in addition to just push a 
new value to the record?  I don't want to process the record, which most 
likely would put the record in a good state.
Sorry for bugging you and thanks,
Zen

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System