[SciPy-User] DAQmx python wrapper

[josef.pktd at gmail.com]

On Mon, Apr 28, 2014 at 3:39 PM, Gary Pajer <gary.pajer at gmail.com> wrote:

> Andrew Straw's PyUniversalLibrary appears to be on PyPi<https://pypi.python.org/pypi/PyUniversalLibrary/>
>
>
google search points here
https://code.astraw.com/PyUniversalLibrary/
http://code.astraw.com/PyUniversalLibrary-downloads/

Josef

> ~-~-~
>
>
> On Mon, Apr 28, 2014 at 1:51 PM, Gary Pajer <gary.pajer at gmail.com> wrote:
>
>> I've used Andrew's wrapper, and it worked well.
>>
>> But in the end I wrote my own routines using ctypes (stealing some ideas
>> from Andrew).   I can't remember exactly why I wrote my own... it was
>> several years ago.  But I do remember that it was really very easy to
>> implement calls using ctypes.
>>
>> ~-~-~
>>
>>
>> On Sat, Apr 26, 2014 at 12:53 PM, Sebastian Berg <
>> sebastian at sipsolutions.net> wrote:
>>
>>> On Sa, 2014-04-26 at 09:04 -0400, John Hassler wrote:
>>> >
>>> > On 4/24/2014 10:23 PM, Charles R Harris wrote:
>>> >
>>> > > Hi Sebastian,
>>> > >
>>> > >
>>> > > On Thu, Apr 24, 2014 at 9:42 AM, Sebastian Berg
>>> > > <sebastian at sipsolutions.net> wrote:
>>> > >         Hey,
>>> > >
>>> > >         We are thinking about writing some DAQ programs in python,
>>> > >         and I was
>>> > >         wondering if anyone can recommend a lib for that. There seem
>>> > >         to be a
>>> > >         bunch of wrappers using ctypes, which seem all good enough,
>>> > >         but if there
>>> > >         is something more highlevel or very well done, I would be
>>> > >         happy to use
>>> > >         that :).
>>> > >
>>> > >         Regards,
>>> > >
>>> > >
>>> > >
>>> > > Is DAQ data acquisition? If so, what sort of data?
>>> > >
>>> > >
>>> > > Chuck
>>> > >
>>> > >
>>> > Which DAQ are you using?  There is 'comedi' for internal boards, but I
>>> > don't know of anything except the "ctype wrappers" for usb boxes.
>>> > When I started doing this several years ago, I wrote my own ctype
>>> > wrappers to access the dll for the Measurement Computing USB-1208 and
>>> > for the NI-USB6008.  Mine were very simple, and did only what I
>>> > needed.  There's a number of them on the web now, but I haven't looked
>>> > an any of them in detail.
>>> >
>>>
>>> Sorry, thought the DAQ was more clear then it probably is. What we have
>>> is a National instruments USB DAQ unit (M-Series). We are actually using
>>> it more for analog output then input right now.
>>>
>>> > Andrew Straw wrote a very nice object-oriented driver for the
>>> > Measurement Computing USB devices in Python.  However, I found
>>> > references to it in Cookbook/Data Acquisition, but I couldn't find the
>>> > actual PyUniversalLibrary.  Maybe it's no longer active.
>>> >
>>>
>>> I will have a look if I find it, that sounds interesting, I also was
>>> hoping that a wrapper could maybe help with multiprocessing magic to
>>> separate the gui as much as possible from the signal generation. Though
>>> maybe that is too high level to really do in any case.
>>> I have started playing with one of the ctypes wrappers and it indeed
>>> works very well. Rather annoying, because I initially wrote labview and
>>> now have to realize that the C-Api is identical and can easily be called
>>> from python, too :)...
>>>
>>> - Sebastian
>>>
>>> >
>>> > "Ctype wrappers" have worked very well for me.  We have one experiment
>>> > using two USB-1208 and one NI-USB-6008 simultaneously in a single
>>> > Python program with a Tkinter GUI, and it works fine.
>>> >
>>> > john
>>> >
>>> >
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>>>
>>>
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>>
>>
>
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