Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Fri, 3 Apr 2009 05:48:03 -0500

Several changes have been made to the ASYN support module at this

week's EPICS codeathon. Here's your chance to comment on them before

they become part of the next release.

1. asynReport at detail level 0 now reports only disconnected

subaddresses. The previous level 0 report was far too long for

register-based devices that sometimes had scores (or even hundreds) of

addresses in completely benign states.

2. The autoconnect code has undergone considerable modification. When

a port is registered with autoConnect true, or whenever a port

disconnect exception is raised on an autoConnect port, an attempt at

connection occurs immediately followed by retry attempts at 20 second

intervals. Attempts to queue requests to a disconnected port (even an

autoConnect port) will be rejected. These changes have been made to

reduce the occurences of 'connection flurries' and to ensure that

requests do not languish in the queue when connections are broken.

3. Setting the trace mask or trace I/O mask for a port now also sets

the trace mask or trace I/O mask for every device associated with that

port.

4. Passing a NULL pasynUser argument to the setTraceMask and

setTraceIOMask will set the asynBase (default) trace mask or trace I/O

mask. Previously there was no mechanism for changing the default

trace masks.

5. Add new asynStatus codes, asynDisconnected and asynDisabled.

Attempts to queue a request to a disconnected or disabled port return

these codes, respectively. Future changes to record support may

propogate these to the record alarm status field.

--
Eric Norum <[email protected]>
Advanced Photon Source
Argonne National Laboratory
(630) 252-4793

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System