Experimental Physics and
Industrial Control System

Bill Nolan <[email protected]> · Mon, 11 Dec 2006 11:41:11 -0600

Hi All,

I have a question about how the asyn drivers deal with a read timeout,

I am working with a device under devAsyn over a serial line through
asynOctet.

What I am seeing is that devAsyn is dropping or ignoring input on a read.
 I send a command to the device to start a long 10-120 sec) process,
I recive back an ACK and then wait in a loop that calls asynOctet->read,
and check the return for errors or a completion notice.

This model works most of the time, but if the completion notice
arrives durring a the asyn timeoutHandler, then the data is lost.
Is this an intended behavior for devAsyn ?

Would using a asynOctetSyncIO where I can block solve this ?

If so do I need to change my entire device support to use
asynOctetSyncIO , or can I have both a Octet and a SyncIO interface to
the same device with out interfering with each other?
Thanks for any help.
--Bill
--
Bill Nolan
Washington University Medical School
Department of Biochemistry
4566 Scott Ave.
Mail Stop 8231
St. Louis, Mo 63110
1.314.362.4445 Fax 1.314.362.7183

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System