File content as of revision 1:5b0303768126:

#ifndef  MCP_H_
#define  MCP_H_

#include "mbed.h"
#include "MCP23017.h"

#define SDA PB_7
#define SCL PB_6

#define MCP_ADDRESS 0x40



typedef enum {
    a0 = 0,
    a1 = 1,
    a2 = 2,
    a3 = 3,
    a4 = 4,
    a5 = 5,
    a6 = 6,
    a7 = 7,
    b0 = 8,
    b1 = 9,
    b2 = 10,
    b3 = 11,
    b4 = 12,
    b5 = 13,
    b6 = 14,
    b7 = 15,
}pin_name;


typedef enum {
    OUTPUT,
    INPUT,
    INPUT_PULLUP,
}pin_mode;

typedef struct byte{
    uint8_t port_A;
    uint8_t port_B;
}byte;

typedef union {
    byte port;
    uint16_t all;
}mcp_data;

class MCP {
    public:
        /* MCP class constracter
        /   deffult Input
        /                                              */
        MCP(PinName sda, PinName scl, uint8_t device_address);
        // MCP pin define * pin number is 0 ~ 15
        void PinMode(uint8_t pin, pin_mode mode);
        // MCP DigitalWrite * pin number is 0 ~ 15
        void Write(uint8_t pin, bool signal);
        // MCP DigitalRead * pin number is 0 ~ 15
        bool Read(uint8_t pin);
        // MCP initialize
        void Initialize(void);
        // MCP register update and read new data
        void Update(void);
        // i2c error check
        bool ErrorOccurred(void);
        
    private:
        I2C i2c;
        MCP23017 mcp;
        char _read_opcode;
        char _write_opcode;
        
        mcp_data _iodir_data;
        mcp_data _pull_data;
        mcp_data _read_data;
        mcp_data _write_data;
        
        void _Write(uint8_t address, uint8_t data);
        void _Read(uint8_t address, uint8_t data);
    
};

#endif //I2C_H_