Add Measurements to python?

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strangequark
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Add Measurements to python?

Post by strangequark » Fri May 10, 2019 4:20 pm

I am trying to set up a way to measure and get the pulse width values in python. In the Picoscope software, this would be done by adding a measurement, but how is this done with programming languages?

I've been trying to decode the pico.measurements.dll file to see the source code as a means of using that to call the functions necessary in python, but it is written in Assembly and doesn't not translate fully when I try to decode into utf-8/text.

Is there a way I can have the source code for the .dll extension translated into text so I can read the commands? I do not see this option in the manual.

Martyn
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Re: Add Measurements to python?

Post by Martyn » Fri May 10, 2019 7:48 pm

We can't release any of our PicoScope code, however you should be able to code this easily. Look for max and min values in a buffer and then search for midpoint crossings and count the samples between them.
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strangequark
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Re: Add Measurements to python?

Post by strangequark » Mon May 13, 2019 12:55 pm

Thank you, I will try that!

strangequark
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Re: Add Measurements to python?

Post by strangequark » Mon May 20, 2019 5:49 pm

Pardon, but I am honestly not sure where to start here... what values exactly am I getting from the buffer for the max and min? I can't find any examples of this ... this all seems very vague

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Re: Add Measurements to python?

Post by strangequark » Tue May 28, 2019 7:39 pm

Is no one going to answer or?

Martyn
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Re: Add Measurements to python?

Post by Martyn » Tue May 28, 2019 9:32 pm

The values you get in the buffers will be ADC counts, unless you have selected downsampling you only need to consider the Max buffer as this will contain all the sample points that make up your signal. If you parse through this firstly to find the maximum and minimum ADC counts, and then re-parse to find the points at which the trace crosses the mid point values you should be able to work out the number of samples per half cycle of the waveform. Number of samples multiplied by the sample interval will give the pulse width.

If you post your code trying to do this we can advise if it is correct.
Martyn
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