An OpenViBe driver for the gtec gUSBAmp running under linux
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README

The MIT License (MIT)

Copyright (c) 2015 Thomas Stewart

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Acknowledgements:

This driver was written by Tom Stewart under the supervision of 
Dr. Tomasz M. Rutkowski in the University of Tsukuba's BCI Laboratory 
http://bci-lab.info/

Installation:

The driver was developed using gtec's Linux C API 1.14.02. For it build properly,
the install.sh supplied with the gtec API needs to have been run which should
have created the following files:

/usr/lib/libgusbampapiso.so.1.14.02
/usr/include/gAPI.h
/etc/gtec/filter_files/DSPfilter.bin
/etc/gtec/filter_files/DSPNotchfilter.bin

To access the USB without being root, you'll need to add yourself to the
plugdev group and write a udev rule. 

To do that, first check if there is a plugdev group:

$ groups

If there isn't already a plugdev group, then add it using:

$ sudo groupadd plugdev

Now execute the following:

$ sudo usermod -a -G plugdev <your-username>

If you're not sure what your username is, check it with:

$ whoami

Next create a file named /etc/udev/rules.d/10-gusbamp-usb.rules

$ sudo touch /etc/udev/rules.d/10-gusbamp-usb.rules

And open it with nano editor

$ sudo nano /etc/udev/rules.d/10-gusbamp-usb.rules

Now paste the following line into the editor:

ATTRS{idProduct}=="0001", ATTRS{idVendor}=="153c", MODE="666", GROUP="plugdev"

The values for idProduct and idVendor should match the ones that show up just 
after you've plugged in the amplifier and executed:

$ dmesg

Lastly, be sure to log out and back in.

Useage:

The driver gives access to everything in the API with the exception of the channel
calibration and asynchronous configuration for digital outputs.

To run multiple gUSBAmps in parallel, use multiple instances of the acquisition server
and configure each instance as Master / Slave according to gtec's documentation. When
starting the acquisition, first connect to all the devices then press play on each device 
starting with the master.