Before someone asks:
FEZ Hydra’s processor, SAM9RL64, has a built in touch controller which uses 4 of the analog pins.
This leaves 2 free analog pins.
Gadgeteer A socket needs 3 analog pins
So, we have 2 options:
- We will use the touch controller and end up with one and only one analog/touch socket. Even worse, once you plug touch in, you will end up with no analog sockets.
- We do not use the touch controller and “fake” a touch controller manually. This way we will have 2 analog sockets. EMX (FEZ Spider) handles touch screen this way.
We decided to go with option 2.