InputEvents/api/GpioExpanderAdapter_8h_source.html

#ifndef GpioExpanderAdapter_h

#define GpioExpanderAdapter_h


#include "Arduino.h"


class GpioExpanderAdapter {


    public:

    virtual void begin() = 0;


    virtual void update() = 0;


    virtual bool read(byte pin) = 0;


    virtual void attachPin(byte pin, int mode = INPUT_PULLUP) = 0;


    void write(byte pin, bool state) {}


    bool canWrite() { return false; }


    virtual ~GpioExpanderAdapter() = default;


};


#endif

GpioExpanderAdapter
The base class/interface specification for GPIO expanders.
Definition: GpioExpanderAdapter.h:10

GpioExpanderAdapter::read
virtual bool read(byte pin)=0
Returns the state of a pin on the expander.

GpioExpanderAdapter::begin
virtual void begin()=0
Initialize the expander. (Idempotent)

GpioExpanderAdapter::update
virtual void update()=0
Read the state of all pins on the expander.

GpioExpanderAdapter::attachPin
virtual void attachPin(byte pin, int mode=INPUT_PULLUP)=0
Use it to configure individual pin mode, if expander allows it. Not all of them do.

GpioExpanderAdapter::canWrite
bool canWrite()
Returns true if the concrete GpioExpanderAdapter has implemented the write() method.
Definition: GpioExpanderAdapter.h:56

GpioExpanderAdapter::write
void write(byte pin, bool state)
Optionally implemented by concrete GpioExpanderAdapters if they support writing to pins.
Definition: GpioExpanderAdapter.h:48