switch.h

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#pragma once
#ifndef DSY_SWITCH_H
#define DSY_SWITCH_H
#include "daisy_core.h"
#include "per/gpio.h"
#include "sys/system.h"
 
namespace daisy
{
class Switch
{
  public:
    enum Type
    {
        TYPE_TOGGLE,    
        TYPE_MOMENTARY, 
    };
    enum Polarity
    {
        POLARITY_NORMAL,   
        POLARITY_INVERTED, 
    };
 
    Switch() {}
    ~Switch() {}
 
    void Init(Pin        pin,
              float      update_rate,
              Type       t,
              Polarity   pol,
              GPIO::Pull pu = GPIO::Pull::PULLUP);
 
    void Init(Pin pin, float update_rate = 0.f);
 
    void Debounce();
 
    inline bool RisingEdge() const { return updated_ ? state_ == 0x7f : false; }
 
    inline bool FallingEdge() const
    {
        return updated_ ? state_ == 0x80 : false;
    }
 
    inline bool Pressed() const { return state_ == 0xff; }
 
    inline bool RawState()
    {
        const bool raw = hw_gpio_.Read();
        return flip_ ? !raw : raw;
    }
 
    inline float TimeHeldMs() const
    {
        return Pressed() ? System::GetNow() - rising_edge_time_ : 0;
    }
 
    inline void SetUpdateRate(float update_rate) {}
 
  private:
    uint32_t last_update_;
    bool     updated_;
    Type     t_;
    GPIO     hw_gpio_;
    uint8_t  state_;
    bool     flip_;
    float    rising_edge_time_;
};
 
} // namespace daisy
#endif