RobTillaartPCF8575ExpanderAdapter.h

// #ifdef __ADAFRUIT_MCP23XXX_H__
 
#ifndef RobTillaartPCF8575ExpanderAdapter_h
#define RobTillaartPCF8575ExpanderAdapter_h
 
#include "Arduino.h"
#include <PCF8575.h>
#include "GpioExpanderAdapter/GpioExpanderAdapter.h"
#include "PinAdapter/PinAdapter.h"
 
class RobTillaartPCF8575ExpanderAdapter : public GpioExpanderAdapter {
 
public:
 
    RobTillaartPCF8575ExpanderAdapter() 
        : pcf(0x20) 
        {}
 
    RobTillaartPCF8575ExpanderAdapter(const uint8_t deviceAddress, TwoWire *wire = &Wire) 
        : pcf(deviceAddress, wire) 
        {}
 
    RobTillaartPCF8575ExpanderAdapter(PCF8575& _pcf)
        : pcf(_pcf)
        {}
 
    void begin() override {
        pcf.begin();
        delayMicroseconds(400);
        pinStates = pcf.read16();
    }
 
    void update() override {
        pinStates = pcf.read16();
    }
 
    void attachPin(byte pin, int mode = INPUT_PULLUP) override {
 
    }
 
    bool read(byte pin) override {
        return bitRead(pinStates, pin);
        //return pcf.read(pin);
    }
 
    bool updateAndRead(byte pin) {
        return pcf.read(pin);
    }
 
    void write(byte pin, bool state) {
    }
 
    bool canWrite() { return true; }
 
    virtual ~RobTillaartPCF8575ExpanderAdapter() = default;
 
private:
 
    PCF8575 pcf;
    uint16_t pinStates = 0;
};
 
 
#endif
// #endif