digital_input.h

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#ifndef DIGITAL_INPUT_H
#define DIGITAL_INPUT_H
 
#include <Arduino.h>
 
namespace modulove {
 
class DigitalInput {
   public:
    enum InputState {
        STATE_UNCHANGED,
        STATE_RISING,
        STATE_FALLING,
    };
 
    DigitalInput() {}
    ~DigitalInput() {}
 
    void Init(uint8_t cv_pin) {
        pinMode(cv_pin, INPUT);
        cv_pin_ = cv_pin;
    }
 
    void Process() {
        old_read_ = read_;
        read_ = digitalRead(cv_pin_);
 
        // Determine current clock input state.
        state_ = STATE_UNCHANGED;
        if (old_read_ == 0 && read_ == 1) {
            state_ = STATE_RISING;
            on_ = true;
        } else if (old_read_ == 1 && read_ == 0) {
            state_ = STATE_FALLING;
            on_ = false;
        }
    }
 
    inline InputState State() { return state_; }
 
    inline bool On() { return on_; }
 
    inline bool Read() { return digitalRead(cv_pin_); }
 
   private:
    uint8_t cv_pin_;
    uint8_t read_;
    uint8_t old_read_;
    InputState state_;
    bool on_;
};
 
}  // namespace modulove
 
#endif