TinyAdafruit_MCP23008.h

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#ifndef _ADAFRUIT_MCP23008_H
#define _ADAFRUIT_MCP23008_H
// Don't forget the Wire library
class Adafruit_MCP23008 {
public:
  void begin(uint8_t addr);
  void begin(void);

  void pinMode(uint8_t p, uint8_t d);
  void digitalWrite(uint8_t p, uint8_t d);
  void pullUp(uint8_t p, uint8_t d);
  uint8_t digitalRead(uint8_t p);
  uint8_t readGPIO(void);
  void writeGPIO(uint8_t);

private:
  uint8_t i2caddr;
  uint8_t read8(uint8_t addr);
  void write8(uint8_t addr, uint8_t data);
};

#define MCP23008_ADDRESS 0x20 

// registers
#define MCP23008_IODIR 0x00   
#define MCP23008_IPOL 0x01    
#define MCP23008_GPINTEN 0x02 
#define MCP23008_DEFVAL                                                        \
  0x03 
#define MCP23008_INTCON 0x04 
#define MCP23008_IOCON 0x05  
#define MCP23008_GPPU 0x06   
#define MCP23008_INTF 0x07   
#define MCP23008_INTCAP 0x08 
#define MCP23008_GPIO 0x09   
#define MCP23008_OLAT 0x0A   

#endif