PinMixerAdapter.h

#ifndef PinMixerAdapter_h
#define PinMixerAdapter_h
 
#include <Arduino.h>
#include "PinAdapter.h"
 
class PinMixerAdapter : public PinAdapter {
 
    public:
    PinMixerAdapter(PinAdapter* pin1, PinAdapter* pin2 )
        : pin1(pin1), pin2(pin2)
        { }
 
    void begin() {
        pin1->begin();
        pin2->begin();
        currentStatePin1 = previousStatePin1 = pin1->read();
        currentStatePin2 = previousStatePin2 = pin2->read();
        state = currentStatePin1; //we have to choose one...
    }
 
    bool read() {
        //Only update state if the either of the pixer pin states have changed
        currentStatePin1 = pin1->read();
        if ( currentStatePin1 != previousStatePin1 ) {
            previousStatePin1 = currentStatePin1;
            state = currentStatePin1;
        }
        currentStatePin2 = pin2->read();
        if ( currentStatePin2 != previousStatePin2 ) {
            previousStatePin2 = currentStatePin2;
            state = currentStatePin2;
        }
        return state;
    }
 
    private:
    PinAdapter* pin1;
    PinAdapter* pin2;
    bool state; //the returned state
    bool currentStatePin1;
    bool previousStatePin1;
    bool currentStatePin2;
    bool previousStatePin2;
 
};
 
#endif