arduino_rfid_controller / interrupt_support.h

 * an extension to the interrupt support for arduino.
 * add pin change interrupts to the external interrupts, giving a way
 * for users to have interrupts drive off of any pin.
 * Refer to avr-gcc header files, arduino source and atmega datasheet.
#ifdef __cplusplus
extern "C" {
void PCattachInterrupt(uint8_t pin, void (*userFunc)(void), int mode);
void resetInterruptPin(int i);
#ifdef __cplusplus