README for AdaEncoder Note that you MUST connect the two pins for your rotary encoder to 2 pins on the same PORT on the ATmega chip. If you do not, your sketch will simply reset. I should probably remove this restriction one day. ALWAYS make sure you are using the latest version of the ooPinChangeInt library. Check this page for the latest version and status: http://code.google.com/p/oopinchangeint/ These are the PORTs on the ATmega328: * Arduino Pins PORT * ------------ ---- * Digital 0-7 D * Digital 8-13 B * Analog 0-5 C (== digital pins 14-19) ATMEGA2560 Pin Change Interrupts, pins and PORTs: Arduino Arduino Arduino Pin* PORT PCINT Pin PORT PCINT Pin PORT PCINT A8 PK0 16 10 PB4 4 SS PB0 0 A9 PK1 17 11 PB5 5 SCK PB1 1 A10 PK2 18 12 PB6 6 MOSI PB2 2 A11 PK3 19 13 PB7 7 MISO PB3 3 A12 PK4 20 14 PJ1 10 A13 PK5 21 15 PJ0 9 A14 PK6 22 0 PE0 8 - this one is a little odd.* A15 PK7 23 * Note: Arduino Pin 0 is PE0 (PCINT8), which is RX0. Also, it is the only other pin on another port on PCI1. Therefore, this pin is not supported by this library.