Experimental Physics and
Industrial Control System

"Mark Rivers" <[email protected]> · Thu, 4 Nov 2004 09:28:12 -0600

Hi Geoff,

> Is it possible to access an asyn driver started from epics from an
> external application?  We need to serialize communication to a device
> and the hardware developers want to be able to use command line
routines
> for device access.  Any suggestions on how to handle this situation
are
> appreciated.

I am not sure if I understand your question.

By "external application" do you mean a channel access client?  By
"command line" do you mean the iocsh command line, or a channel access
command line client?

If you mean a channel access client then answer is yes for most drivers
and interfaces.  The way to do it is with the asynRecord.  In 3-3 the
asynRecord can control trace and connection management for any driver,
but it can only do I/O with asynOctet drivers.  In the next release the
asynRecord can do I/O to all of the standard interfaces except
asynInt32Array and asynFloat64Array.  It also supports "I/O Intr" record
scanning.

If you mean the iocsh command line then there are already commands
provided for doing I/O to asynOctet drivers.  You can easily add
commands for doing I/O to other interfaces using the asyn*SyncIO
interfaces.

Mark

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System