pyusbdux V2 now callback based

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Bernd Porr

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Nov 15, 2022, 10:34:11 AM11/15/22
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Hi all,

I've rewritten pyusbdux now with callbacks. So instead of doing polling
in python in a loop the python program registers a callback and then
receives the samples at the requested sampling rate:

#!/usr/bin/python3

import pyusbdux as dux

class DataCallback(dux.Callback):

    def hasSample(self,s): # <-- sample arrives here
        print("s:",s)

cb = DataCallback()

# open default USBDUX
dux.open()

# sampling from 8 channels
# at a sampling rate of 250Hz.
dux.start(cb,8,250)

# Just idles till the user presses return.
input()

# Stops the data acquisition.
dux.stop()

https://github.com/berndporr/pyusbdux

https://pypi.org/project/pyusbdux/

Coding-wise it's an interesting twist with an interface between two
languages and swig is managing that. I'm using std::array which is now
fully supported so that the number of elements in an array are no longer
a problem.

Best,

/Bernd

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Ian Abbott

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Nov 15, 2022, 12:19:26 PM11/15/22
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On 15/11/2022 15:33, Bernd Porr wrote:
> Hi all,
>
> I've rewritten pyusbdux now with callbacks. So instead of doing polling
> in python in a loop the python program registers a callback and then
> receives the samples at the requested sampling rate:

Thanks Bernd. I've just listed it on the
<https://www.comedi.org/applications.html> page because it was missing
before.

--
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-=( Bird Hall Lane, STOCKPORT, SK3 0XA, UK. || www.mev.co.uk )=-

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