Implementing and testing real-time calculations

ajsol · January 2015

Hi all,

I am new to real-time signal processing and am looking for guidance on how to begin. I am hoping implement a bandpass and an average ear reference.

I am hoping to avoid testing my code on humans so I am looking into the possibility of using the GUI's 'playback' from file feature to read in a pre-existing file in real-time while also applying my chosen filters.

I realize that the GUI has a bandpass option but I'm ultimately looking to embed these filters on the 32-bit board.

Best,

Aj

biomurph · January 2015

Hi Aj,

Please check out this thread

http://openbci.com/index.php/forum#/discussion/278/alpha-detector-on-board

for other folks working with on-board signal processing with the 3bit board

ajsol · January 2015

thanks!

chipaudette · January 2015

Note that the GUI "playback" mode only happens on the PC...the OpenBCI hardware is not involved in any way. So, if you're looking to prototype your new OpenBCI code (as it runs on the hardware), the playback isn't going to help.

You can, however, prototype your algorithms in the Processing GUI itself. Then, the playback mode will be helpful. Unfortunately, if you do your prototyping in Processing, you'll have to write it in Processing (ie, Java). If your eventual target is to have it run on the OpenBCI hardware, you'll then have to be re-write it in C or C++.

Chip

ajsol · January 2015

Hi Chip,

Thanks for your reply- I'm aiming to prototype the algorithm and I'm glad this is an option. Presently I'm aiming to prototype it in MATLAB (I'm more fluent in it than Java) using FieldTrip to simulate a data stream from a preexisting file. While it'll take a little more research on my part, it looks like MATLAB can convert to C++ without too much pain.

Aj

Implementing and testing real-time calculations

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