InterruptHandler
===========
An object-oriented interrupt handler library for the Arduino. Instead of the
simple C function pointer used by the built-in [attachInterrupt()](https://www.arduino.cc/en/Reference/AttachInterrupt)
function, it uses a pure C++ virtual method as a callback. This
allows for a cleaner more object oriented design, which is especially useful for
libraries. The performance should be on par with the built-in version of
[attachInterrupt()](https://www.arduino.cc/en/Reference/AttachInterrupt),
because it is based on an only slightly modified version of the original
Arduino source code.
Usage
-----
The usage is very simple. You just inherit from
the class InterruptHandler and implement the method handleInterrupt().
```cpp
#include <InterruptHandler.h>
// Inherit from InterruptHandler
class MyLib : InterruptHandler {
byte inputPin;
unsigned long localState1;
unsigned long localState2;
public:
MyLib(byte inputPin) : inputPin(pin) {}
void begin() {
pinMode(inputPin, INPUT);
attachInterrupt(digitalPinToInterrupt(inputPin), CHANGE);
}
void stop() {
detachInterrupt(digitalPinToInterrupt(inputPin));
}
// Overwrite handleInterrupt() method
virtual void handleInterrupt(int8_t interruptNum) {
// Do something
localState1 = digitalRead(inputPin);
// ...
}
};
```
