Trying to Duplicate Chip's Alpha Wave Detector using Ganglion Board

allenine

Hey all, my name's Allen. I'm a fresh noobie in the BCI world, so for my first project I'm trying to replicate Chip's Alpha Wave Detector, but using the Ganglion and writing my own code. Here are links to Chip's stuff:

• Blogpage
  
• Chip's Code

As a first step, i've followed this tutorial to learn how to interact arduino with processing so I can get EEG information out of the COM ports to my arduino. 

Currently, I am trying to comprehend Chip's code for his alpha wave detector and immediately ran into many walls. The first glaring one is the fact that Chip uses an ADS1299 library to communicate with his open-bci board's analog-digital converter. However, Ganglion uses MCP3912 ADC, and I have no idea how to even begin writing a new library for MCP3912. So i'm wondering if anyone has any advice of how I should progress from here. 

In addition, is anyone else out there a beginner like me and having issues getting off the ground? If so, I think it'd be a cool idea to start a little online group to collaborate on beginner projects together in order facilitate learning.  

wjcroft

http://openbci.com/forum/index.php?p=/discussion/960/programming-ganglion-simblee-microcontroller-with-arduino-ide

The tutorial does not exist yet. In progress.

allenine

Yes, that tutorial will deal with programming the microcontroller on the Ganglion board itself, correct? I simply want to write a processing sketch that sends the EEG data that my computer receives from my Ganglion to my arduino uno, with no modification of the simblee's microcontroller in the Ganglion. 

wjcroft

Within the next couple weeks, a "networking widget" for the GUI will become available. This allows output in several stream formats such as OSC, LSL, etc. That might be your best bet. This is the raw sample data stream you are looking for.

allenine

@wjcroft is there a timeline for the tutorial?

biomurph

@allenine

You don't need to re-program the Ganglion to do alpha detection. I have updated Chips code here

https://github.com/biomurph/OpenBCI_AlphaDetector

This will only run on Processing 2.2.1, and I can't make any guarantees that it will actually do what you want it to...

The relevant code is in the 'EEG_Processing' tab, and the functions in EEG_Processing_User' class are doing the Alpha detection.