Re: [Linux-gpib-general] GPIB libs on 64-Bit machine

[John A. N. <jr...@fe...>]

The one thing I can think of is that the USB module has 64 bit issues 
that the NI-PCI module doesn't.

I've never used USB GPIB, so don't know waht those issues might be...

John
----

Martin Ohlerich wrote:
> Ups. So it should work also on a 64-Bit machine. (Thanks :) ) And I'm 
> sorry. I don't want to bother someone. I only want to understand what I 
> am doing wrong.
> 
> Then the question stays: When I installed (i.e. configured, maked, make 
> installed) the library without problems, when all hotplug-stuff and 
> ld.so.conf and permissions are set correctly, when hardware is ok -> 
> what could be the reason for the error message on 'ibtest':
> trying to open board named 'gpib-usb-hs'
> libgpib: IBOPENDEV ioctl failed
> libgpib: ibfind failed to get descriptor
> failed to open board
> ?
> 
> I get the same message when I boot up my 32-Bit and try 'ibtest'. I have 
> to replug the gpib-usb-hs first before it is accessible. Did I forget 
> something concerning permission settings?? usb-hotplugging and 
> /dev/gpib* are set. Kernel modules are running - also directly after the 
> booting.
> 
> But at least after replugging I get it running on the 32-Bit machine. 
> This is unfortunatelly not the case for the 64-Bit system. And as I 
> wrote before: I did exectly the same steps on both systems - which are 
> both Scientific Linux 4 distributions. The only (really only) difference 
> is that one system is 32-Bit the other 64-Bit. I've not idea about the 
> differences of the system interna - but as you confirmed this shouldn't 
> be an issue.
> 
> I just don't understand it.
> 
> Cheers,
> Martin
> 
> 
> 
> On Wed, 28 Nov 2007, John Ackermann N8UR wrote:
> 
>> For what it's worth, I built the current gpib stuff (from sourceforge)
>> on an AMD 64 bit machine, and at least for the limited application I
>> used (screen dumps from an HP 8566 spec an, using an NI GPIB-PCI card),
>> it all worked.
>>
>> John
>> ----
>>
>> Martin Ohlerich wrote:
>>> Hello Frank,
>>>
>>> thanks for this fast answer. However I'm not sure whether I 
>>> understand it.
>>> I was compiling the gpib-library on the 64-Bit machine. This was without
>>> any problem. Why there should be afterwards trouble?
>>> Of cource, calls from 32-Bit programm into 64-bit libraries won't work.
>>> This is the reason why I cannot use labview with these gpib-libraries.
>>> (labview=32-Bit application, gpib=64-Bit library)
>>>
>>> But if I compiled gpiblib on the 64-machine and hence have a 64-Bit
>>> gpib library then I should be able to access the gpib boards or devices
>>> via the 'ibtest' test programm. Or do I see this wrong?
>>> If there is no compalibility in the ioctl structs between 32 and 64 Bit
>>> why does the compiler not complaint?
>>>
>>> Cheers,
>>> Martin
>>>
>>>
>>> On Tue, 27 Nov 2007, Frank Mori Hess wrote:
>>>
>>>> On Tuesday 27 November 2007 12:39, Martin Ohlerich wrote:
>>>>> Hello all,
>>>>>
>>>>> I want to write gpib-DAQ software for a Keithley, which is accessed 
>>>>> via
>>>>> gpib-usb-hs from National Instruments. For this I took the 
>>>>> gpib-library
>>>>> from sourceforge : linux-gpib-3.2.09. The OS of my PC is Scientific
>>>>> Linux 4. I successfully installed libgpib on a 32-Bit machine.
>>>>> When I did the same steps on a 64-Bit machine I failed. The 
>>>>> installation
>>>>> itself worked without problems. Also the modules are loaded (I checked
>>>>> this with help of lsmod). All permissions are set correctly (I even
>>>>> tried as root). By 'cat /proc/bus/usb/devices' I saw that the
>>>>> gpib-usb-hs was detected correctly. So everything looks fine.
>>>>>
>>>>> The result on the 64-Bit machine is, however, when starting 
>>>>> 'ibtest' and
>>>> calls from a 32 bit libgpib user space library into a 64 bit kernel 
>>>> won't
>>>> work, as the ioctl structs are not 32/64 bit agnostic, and the gpib 
>>>> kernel
>>>> driver doesn't implement compat_ioctl.
>>>>
>>>> -- 
>>>> Frank
>>>>
>>>>
>>>
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