Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Fri, 2 Jun 2006 08:31:20 -0500

The way I interpreted the original message is that they're interested
in only one of the three values in the string returned from the
instrument, and so wouldn't need to do anything tricky with custom
conversion routines or string calc records.
On Jun 2, 2006, at 7:18 AM, Dalesio, Leo `Bob` wrote:
Two options for this would be:

Write a driver that sends the commands to the Keithly and puts the
values in local variables.

Have the device support read the local variables

Have the startup file start the task that continuously reads the
Keithley.

Put the task to sleep between reads for whatever rate you are
trying to acieve.
Otherwise, use a string Calc record - I am fairly certain that it
offers format statements for parsing strings from GPIB devices.
Bob
-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: Friday, June 02, 2006 4:39 AM
To: [email protected]
Subject: need help
Hi!
I am trying to communicate with Keithley 6485 pA to read the
current.After sending the command it provides current value and
some other value separated by comma.but i am only interested to
store the current.

The response is like this:

-1.047791E-13A,+4.055828E+03,+0.000000E+00\r

How it can be done?

will i have to use any convert function?

i am attaching the code here

static struct gpibCmd gpibCmds[] = {

/* Param 0 */

{&DSET_AI,GPIBREAD,IB_Q_LOW,"CONF:CURR""\r""READ?""\r",
0,0,20,0,0,0,NULL,NULL,"\r"}

};

Thanks

tanushyam
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TANUSHYAM BHATTACHARJEE
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VARIABLE ENERGY CYCLOTRON CENTRE
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email:[email protected]
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--
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