Generating a square wave from digital output on usb-6281

[aya_from_condor]

Hi everyone.

I'm using a usb-6281 DAQ. I need to generate a square wave through a digital output line, and I'm controlling the entire operation with the python ni-daqmx library.

Can anyone point me in the right direction? I looked it up in the documentation and saw there are specific parameters for doing this through an AO line but since all I need is a square wave with a constant max/min value DO should technically be enough.

Thanks in advance,

Aya.

[santo_13]

You can instead generate a pulse train using counters.

[aya_from_condor]

Hey, can you maybe specify how to do this or drop an example?

I googled pulse train and it lead me to counter channels, but I don't quite understand the parameters and how to use them.

Thanks a bunch.

[santo_13]

This is a good example to start with - https://github.com/ni/nidaqmx-python/blob/master/nidaqmx_examples/co_pulse_time.py

You should be able to refer to the PyPI documentation and modify this to take in frequency and duty cycles instead of high and low times.