ButtonMatrix.hpp

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/* ✔ */
 
#pragma once
 
#include <AH/Hardware/Hardware-Types.hpp>
 
BEGIN_AH_NAMESPACE

template <class Derived, uint8_t NumRows, uint8_t NumCols>
class ButtonMatrix {
  public:
    ButtonMatrix(const PinList<NumRows> &rowPins,
                 const PinList<NumCols> &colPins);

    void begin();

    void update();

    bool getPrevState(uint8_t col, uint8_t row);

    void setDebounceTime(unsigned long debounceTime) {
        this->debounceTime = debounceTime;
    }

    unsigned long getDebounceTime() const { return debounceTime; }
 
  protected:
    void onButtonChanged(uint8_t row, uint8_t col, bool state) = delete;
 
  private:
    static inline uint8_t positionToBits(uint8_t col, uint8_t row);
    static inline uint8_t bitsToIndex(uint8_t bits);
    static inline uint8_t bitsToBitmask(uint8_t bits);
    void setPrevState(uint8_t col, uint8_t row, bool state);
 
    unsigned long debounceTime = BUTTON_DEBOUNCE_TIME;
    unsigned long prevRefresh = 0;
    uint8_t prevStates[(NumCols * NumRows + 7) / 8];
 
    const PinList<NumRows> rowPins;
    const PinList<NumCols> colPins;
};
 
END_AH_NAMESPACE
 
#include "ButtonMatrix.ipp" // Template implementations