I’m using the I2C touch sensor twig in my entry in the toy hacking contest. I’ve contributed a module for this controller to an Arduino library for I2C devices, check it out here: github.com/jrowberg/i2cdevlib
This library works just fine for channels 0-3, but I’m having trouble doing anything at all with channels 8-11 (the other channels that are brought out to connectors on the twig). It appears that channels 8-11 mirror channels 0-3 and aren’t working themselves. E.g., a touch on channel 0 also results in what appears to be a touch on channel 8, likewise for 1 and 9, 2 and 10, and 3 and 11. Channels 8-11 appear inoperative when I hook touch elements up to them directly.
Is this a result of mis-configuring the controller IC over the I2C interface? Do you have some example code that works for all 8 of the channels that are brought out to the board?