Experimental Physics and
Industrial Control System

Rod Nussbaumer <[email protected]> · Thu, 26 Nov 2015 16:19:16 -0800

Since you didn't mention it in your otherwise detailed list, I will

mention that following the loading of the GPIB kernel drivers, you must

run the gpib_config command, which gets built as part of the linux-gpib

package. This must be done as root, I believe. Also, the default

permissions on the /dev/gpibXX device nodes generally seem to end up

with root-only write access, so either your application will need root

privileges, or the device nodes must have user/group write permission

added.

Rod Nussbaumer
Controls Group, TRIUMF
Vancouver, Canada

On 11/26/2015 01:10 PM, Vinícius Mariani Lenart wrote:

Dear EPICS,

       I recently discovered the site and I would like to congratulate
the good work done. Furthermore, I would like to share a problem =). I
post my problem in the stackoverflow site in this link
ioctl-errorno-25-in-gpib-communication-using-python-gpib
<http://stackoverflow.com/questions/33946130/ioctl-errorno-25-in-gpib-communication-using-python-gpib>.
But I paste a copy below.

I am trying to communicate with a Tektronix oscilloscope TDS 210 using a
GPIB-USB-HS adapter of National Instruments. My system is Ubuntu 14.04.3
where I installed linux-gpib as described in this link: Linux GPIB
Driver package (source)
<http://sourceforge.net/p/linux-gpib/mailman/linux-gpib-general/thread/[email protected]/> and
also python-gpib. I reconfigured the /etc/gpib.conf like this:

|interface{
     minor=  0    /*  board index,  minor=  0  uses/dev/gpib0,  minor=  1  uses/dev/gpib1,  etc.  */
     board_type=  "ni_usb_b"  /*  type of interface board being used*/
     name=  "tds"     /*  optional name,  allows you to get a board descriptor using ibfind()  */
     pad=  0  /*  primary address of interface*/
     sad=  0  /*  secondary address of interface*/
     master=  yes/*  interface boardis  system controller*/
     timeout=  TNONE/*  timeoutfor  commands*/
}
device{
        minor=  0
        name=  "ATTN"
        pad=  0
        sad=  0
}|

The lsmod give me this:

|$ lsmod|  grep gpib
ni_usb_gpib36515   1
gpib_common38274   3  ni_usb_gpib|

The dmesg:

|$ dmesg|  grep gpib
[  2173.992039]  ni_usb_gpib driver loadingni_usb_gpib:  probe succeededfor  path:  usb-0000:00:1a.0-1.2
[  2173.992098]  usbcore:  registered new interface driver ni_usb_gpib
[  2173.992102]  gpib:  registered ni_usb_b interface
[  2173.995077]  ni_usb_gpib:  attach|

But when a try to communicate with the oscilloscope using ibtest I
receive this error:

|gpib statusis:
ibsta=  0x8100   <  ERR CMPL>
iberr=  0
EDVR0:  OS error
ibcnt=  25|

And with Python:

|import  Gpib
tds=  Gpib.Gpib(0,0)
tds.write("*IDN?")
---------------------------------------------------------------------------
GpibError                                  Traceback  (most recent call last)
<ipython-input-4-e61e6a76ac49>  in  <module>()
       1  import  Gpib
       2  inst=  Gpib.Gpib(0,0)
---->  3  inst.write("*IDN?")

/usr/local/lib/python2.7/dist-packages/Gpib.pycin  write(self,  str)
      47
      48          def  write(self,str):
--->  49                  gpib.write(self.id,  str)
      50
      51          def  write_async(self,str):

GpibError:  write()  error:  Inappropriate  ioctlfor  device(errno:  25)|

So, if you know how to fix or can share with the community I will
appreciated.

Best regards!

--------------------------------------------------------
Vinícius Mariani Lenart
E-mail: [email protected] <mailto:[email protected]>
Skype: vmlenart
www.researchgate.net/profile/V_M_Lenart/
<https://www.researchgate.net/profile/V_M_Lenart/>
"/Live long and prosper/"
--------------------------------------------------------

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System