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

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.

Answer 1

[Andrey Kiselnikov]

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.

[Zarin]

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?

Answer 2

[Andrey Kiselnikov]

Try to read about function "drawnow" may be in will be helpful. https://www.mathworks.com/help/matlab/ref/drawnow.html