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

Subject: Re: How to use asyn with linux-GPIB
From: Rod Nussbaumer <bomr@triumf.ca>
To: Feng Laurence <feng.laurence@gmail.com>
Cc: tech-talk@aps.anl.gov
Date: Tue, 15 Mar 2011 09:15:53 -0700
Laurence:

I find it much more convenient to use streamDevice in conjunction with asyn for communicating with GPIB devices. Linux-gpib with asyn and streamDevice is the standard model used at TRIUMF for all GPIB communications in EPICS.

Like any communications channel used by asyn, the startup script must configure the port driver. In your case it would be the GPIB driver. The details for setup of the linux-GPIB port driver are outlined in

'documentation/asynDriver.html#PortDrivers'

included in the asyn package.


Rod Nussbaumer
ISAC Controls, TRIUMF
Vancouver, Canada



Feng Laurence wrote:
Hi everyone~
I'm trying to connect a scope via linux-GPIB. The driver had been
setup and read/write to the scope was successfully tested with
"ibtest"

But when typing in iocsh the command
GpibBoardDriverConfig("L2",1,0,3,0)

I got the error:
2011/03/14 21:48:44.176 L2 addr -1 : EDVR 0: OS error.
2011/03/14 21:48:44.176 L2 addr -1 : EDVR 0: OS error.
........
libgpib: invalid descriptor
libgpib: invalid descriptor
libgpib: invalid descriptor
........ alot of repeat lines.......

Looks like the GPIB device address was not set correctly. However, I
can find no hints in the asyn document for the problem. Is there
anything I missed here?


--
Laurence Feng
Superconducting Radio Frequency Group
State Key Laboratory of Nuclear Physics and Technology
Peking University, 302 Chengfu Road
Beijing 100871 China



Replies:
Re: How to use asyn with linux-GPIB Eric Norum
Re: How to use asyn with linux-GPIB Feng Laurence
Re: How to use asyn with linux-GPIB Feng Laurence
References:
How to use asyn with linux-GPIB Feng Laurence
How to use asyn with linux-GPIB Feng Laurence

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