ButtonMatrix.hpp

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/* ✔ */
 
#pragma once
 
#include <AH/Settings/Warnings.hpp>
AH_DIAGNOSTIC_WERROR() // Enable errors on warnings
 
#include <AH/Hardware/Hardware-Types.hpp>
 
BEGIN_AH_NAMESPACE
 
template <uint8_t nb_rows, uint8_t nb_cols>
class ButtonMatrix {
  public:
    ButtonMatrix(const PinList<nb_rows> &rowPins,
                 const PinList<nb_cols> &colPins);
    virtual ~ButtonMatrix() = default;
 
    void begin();
 
    void update();
 
    bool getPrevState(uint8_t col, uint8_t row);
 
  private:
    virtual void onButtonChanged(uint8_t row, uint8_t col, bool state) = 0;
 
    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 prevRefresh = 0;
    uint8_t prevStates[(nb_cols * nb_rows + 7) / 8];
 
    const PinList<nb_rows> rowPins;
    const PinList<nb_cols> colPins;
};
 
END_AH_NAMESPACE
 
#include "ButtonMatrix.ipp" // Template implementations
 
AH_DIAGNOSTIC_POP()