Experimental Physics and
Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	I/O Intr scanning
From:	"Vishnu Patel" <[email protected]>
To:	"[email protected]" <[email protected]>
Date:	11 Mar 2013 14:10:15 -0000

Hello,

I am developing EPICS driver for reading and writing port.

It is working fine with SCAN is not set to I/O Intr. If i set SCAN to .1 second.... 1 second etc.. I is working fine.

But if i set SCAN = I/O Intr

and monitor with >>camonitor PORT_READ it gives out put

PORT_READ <undefined> 0 UDF INVALID

and even is changing port value doesn't read value.

The .db file content of longin record is as below

record (longin,"PORT_READ")

{

field(DESC, "New Variable")

field(DTYP, "asynInt32")

field(INP, "@asyn($(PORT),0) read")

field(SCAN, "I/O Intr")

}

I would like to know how to configure interrupt as it is working perfect with if SCAN sets to different value then I/O Intr.

Here "read" i am using as asyn reason in driver for reading.

Thanks

Vishnu

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ANJ, 20 Apr 2015