Experimental Physics and Industrial Control System
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The value you want to convert is the first one returned? If so, then
a simple "%lf" scanf format is all you need:
{&DSET_AI, GPIBREAD, IB_Q_LOW, "CONF:CURR""\r""READ?""\r", "%lf",
0,80,0,0,0,NULL,NULL,"\r"}
1) I increased the size of the message buffer from 20 to 80 -- the
example you show below has more than 20 characters in the reply.
2) If you're using the ASYN version of devGpib you can specify the
command/response terminators outside the command table entries. This
often makes the command tables useable by both serial and GPIB
controllers.
If you want to convert the second value in the reply string the scanf
format string is a little more complicated.
"%[^,]*,%lf"
This looks a little complex, but isn't too bad if you consider each
part separately:
%[^,]* -- Match any characters that are not a comma. Do not
store the result.
, -- Match a comma
%lf -- convert the floating point value and store
into a double.
On Jun 2, 2006, at 6:39 AM, [email protected] wrote:
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
--
Eric Norum <[email protected]>
Advanced Photon Source
Argonne National Laboratory
(630) 252-4793
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ANJ, 02 Sep 2010 |
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