XMEGA TWI master and MTCH6102

An alternative title for this article would be: “How to design a crappy touchpad and rip out your hair afterwards”

As I mentioned in my previous post I’m working on something that needs two XMEGAs to talk to each other over TWI. One of them will have a touchpad for human input and a HD44780 compatible 4×20 display. The reason I went this route is because when sourcing buttons to put on the front panel I quickly realized that it would be cheaper to use a capacitive touch solution. Enter the MTCH6102 part from Microchip.

Continue reading “XMEGA TWI master and MTCH6102”