ADS1299 interface with Arduino UNO
Hi, I have made an EEG module and trying to get data from it using Arduino IDE(I have attached sample code and my PCB schematics). I am using ads1299 with bipolar supply. So far I have just Configured CONFIG3 register and CHnSEL registers as following
ADS.WREG(CONFIG3,0xE0) ;//Enabling internal reference
ADS.WREG(CHnSET,0x68); //Selecting normal mode and closing SRB2
I’m able to get data from all 8 N-channels with respect to SRB2(as a reference electrode).
Problem is I want to include BIAS electrode. As far as I know about BIAS electrode, it is used for noise cancellation in a closed loop form ( As discussed in openBCI site : https://docs.openbci.com/docs/01GettingStarted/02-Biosensing-Setups/EEGSetup ).I want to use my setup same as in the link of openBCI but with all 8 channels.
As there are many BIAS registers in ads1299 so I’m confused about there configuration .It will be great if someone could help me in configuring registers so that if I connect SRB2 to one ear lobe and BIAS to other and all other electrodes on EEG head cap I would get data with much lesser noise.