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#ifndef __I2C_H
#define __I2C_H


#define I2C_SLAVE_ADDRESS               0x50

#define I2C_CMD_VERSION                 0x01
#define I2C_CMD_READ_MAG        0x02
#define I2C_CMD_READ_HEADING    0x03
#define I2C_CMD_WRITE_CAL       0x04


typedef struct
{
  u8 Major;
  u8 Minor;
  u8 Patch;
  u8 Compatible;
} __attribute__((packed)) I2C_Version_t;

typedef struct
{
  s16 MagX;
  s16 MagY;
  s16 MagZ;
} __attribute__((packed)) I2C_Mag_t;


typedef struct
{
  s16 Nick;
  s16 Roll;
} __attribute__((packed)) I2C_WriteAttitude_t;


typedef struct
{
  u8 CalByte;
  u8 Dummy1;
  u8 Dummy2;
} __attribute__((packed)) I2C_Cal_t;

typedef struct
{
  s16 Heading;
} __attribute__((packed)) I2C_Heading_t;

typedef enum
{
        I2C_UNDEF,
        I2C_IDLE,
        I2C_TX_PROGRESS,
        I2C_RX_PENDING,
        I2C_RX_PROGRESS,
        I2C_OFF
} I2C_State_t;

extern volatile I2C_State_t I2C_State;
extern volatile u8 I2C_Direction;
extern volatile u32 I2C1_Timeout;

extern volatile I2C_Heading_t           I2C_Heading;
extern volatile I2C_WriteAttitude_t I2C_WriteAttitude;
extern volatile I2C_Mag_t                       I2C_Mag;
extern volatile I2C_Version_t           MK3MAG_Version;
extern volatile I2C_Cal_t                       I2C_WriteCal;
extern volatile I2C_Cal_t                       I2C_ReadCal;
extern volatile u32 CheckI2COkay;

void I2C1_Init(void);
void I2C1_Deinit(void);
void I2C1_SendCommand(u8 command);
void I2C1_GetMK3MagVersion(void);

#endif // I2C_H