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#ifndef I2C_H

#define	I2C_H

#define I2C_BUFFER_SIZE 20

// I2C Operating Speed

#define I2C_400KHZ              0x0

#define I2C_100KHZ              0x1

// Operating State

#define I2C_IDLE                0x1

#define I2C_STARTED             0x2

#define	I2C_RCV_DATA            0x3

#define I2C_SEND_DATA           0x4

#define I2C_SEND_ADDR           0x5

#define I2C_SEND_ADDR_2         0x6

#define I2C_CHECK_ACK_SEND      0x7

#define I2C_CHECK_ACK_RECV      0x8

#define I2C_CHECK_ACK_RESTART   0x9

#define I2C_REQ_DATA            0xA

#define I2C_SEND_STOP           0xB

#define I2C_SEND_START          0xC

// Operating Mode

#define I2C_MODE_SLAVE          0x10

#define I2C_MODE_MASTER         0x11

// Master Status

#define I2C_MASTER_SEND         0x20

#define I2C_MASTER_RECV         0x21

#define I2C_MASTER_RESTART      0x22

#define I2C_MASTER_IDLE         0x23

// Return Status (Master)

#define I2C_SEND_OK             0x30

#define I2C_SEND_FAIL           0x31

#define I2C_RECV_OK             0x32

#define I2C_RECV_FAIL           0x33

// Return Status (Slave)

#define I2C_DATA_AVAL           0x34

#define I2C_ERR_NOADDR          0x35

#define I2C_ERR_OVERRUN         0x36

#define I2C_ERR_NODATA          0x37

typedef struct {

    char buffer_in[I2C_BUFFER_SIZE];

    char buffer_in_len;

    char buffer_in_len_tmp;

    char buffer_in_read_ind;

    char buffer_in_write_ind;

    char buffer_out[I2C_BUFFER_SIZE];

    char buffer_out_len;

    char buffer_out_ind;

    char operating_mode;

    char operating_state;

    char return_status;

    char master_dest_addr;

    char master_status;

    char slave_in_last_byte;

    char slave_sending_data;

} I2C_DATA;

void I2C_Init(I2C_DATA *data);

void I2C_Interrupt_Handler(void);

void I2C_Interrupt_Slave(void);

void I2C_Interrupt_Master(void);

void I2C_Configure_Slave(char);

void I2C_Configure_Master(char speed);

void I2C_Master_Send(char address, char *msg, char length);

void I2C_Master_Recv(char address, char length);

void I2C_Master_Restart(char address, char msg, char length);

char I2C_Get_Status(void);

char I2C_Buffer_Len(void);

char I2C_Read_Buffer(char *buffer);

char I2C_Process_Send(char);

#endif	/* I2C_H */