/*
	INPUT_MCP23017.h - Library for reading inputs from MCP23017 port Expander

	library is for specialiced use: all I/O ports are used as digital inputs with internal pullup resistor active, values are stored and a callback function is called, when a value changes
  
*/
*/
#ifndef INPUT_MCP23017_h
#define INPUT_MCP23017_h

#if !defined(CallbackFunction)
typedef void (*CallbackFunction)(int,int,int);
#endif

class INPUT_MCP23017
{
	public:
		void begin(uint8_t addr,CallbackFunction cbF);
		void loop(void);
		int getSpecificValue(uint8_t pin);
	private:
		uint8_t _addr;
		int _value[16];
		CallbackFunction _callbackFunction;
};

#define MCP23017_ADDRESS 0x20

// registers (from https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library/blob/master/Adafruit_MCP23017.h)
#define MCP23017_IODIRA 0x00
#define MCP23017_IPOLA 0x02
#define MCP23017_GPINTENA 0x04
#define MCP23017_DEFVALA 0x06
#define MCP23017_INTCONA 0x08
#define MCP23017_IOCONA 0x0A
#define MCP23017_GPPUA 0x0C
#define MCP23017_INTFA 0x0E
#define MCP23017_INTCAPA 0x10
#define MCP23017_GPIOA 0x12
#define MCP23017_OLATA 0x14

#define MCP23017_IODIRB 0x01
#define MCP23017_IPOLB 0x03
#define MCP23017_GPINTENB 0x05
#define MCP23017_DEFVALB 0x07
#define MCP23017_INTCONB 0x09
#define MCP23017_IOCONB 0x0B
#define MCP23017_GPPUB 0x0D
#define MCP23017_INTFB 0x0F
#define MCP23017_INTCAPB 0x11
#define MCP23017_GPIOB 0x13
#define MCP23017_OLATB 0x15


#endif