How to get real-time live data stream from sensor and spectral analysis?

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Zarin
Zarin 2019-7-23
编辑： Zarin 2019-7-27
I would like to get the real-time live data stream via a serial port (by fread) from sensor and then I want to evaluate the data for fft analysis. Currently, I am doing it by a "for loop" and for each iteration in the "for loop", I am always losing some real-time live data in the fread due to process it in the fft.
So, could you please suggest me that how can I overcome this issue without discard any data due to processing time in the fft? --Is it possible to solve this issue by matlab script or any alternative way like simulink model or data acquisition toolbox or ...? I am looking forward to hearing from you in details.
Thanks in advance.

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回答（2 个）

Andrey Kiselnikov
Andrey Kiselnikov 2019-7-24
Hi, fft is already multithreaded in MATLAB since 2008a
https://se.mathworks.com/discovery/matlab-multicore.html
For more productive using of parallel computing, there is parallel computing toolbox https://se.mathworks.com/products/parallel-computing.html
Anyway, I assume that problem somewhere in the architecture of your system, I need more information to help you.
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Zarin
Zarin 2019-7-25
编辑：Zarin 2019-7-27
Hi,
Thanks for your time and fruitful information regarding this issue that fft works for multithread and there is also parallel computing toolbox. But what's about fread getting real-time live data continously and data processing, I meant that without losing any live data due to processing delay in the fft? Do you have some idea how to get it?

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Andrey Kiselnikov
Andrey Kiselnikov 2019-7-27
Try to read about function "drawnow" may be in will be helpful. https://www.mathworks.com/help/matlab/ref/drawnow.html

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