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struct i2c_type

{

    unsigned char address;

    unsigned char pointer;

    unsigned short data;

};

struct i2c_mode

{

    unsigned char read_write;

    unsigned char byte_word;

    unsigned char ptr_set;

};

typedef struct i2c_type i2c_type;

typedef struct i2c_mode i2c_mode;

#define I2C_BUF_LEN     10

void i2c_init(void);

void i2c_irq(void);

i2c_type * i2c_get(void);                           //return pointer to first non read received data

void i2c_set_ack_lvl(int ack_lvl, int final_ack_lvl);

int i2c_trans(i2c_mode * mode, i2c_type * data);   //return (-1) or length (still processing previous) or asserted

#define I2C_PRESC_LO     0x00

#define I2C_PRESC_HI     0x01

#define I2C_CTR          0x02

#define I2C_TXR          0x03

#define I2C_RXR          0x03

#define I2C_CR           0x04

#define I2C_SR           0x04

//BITS

#define I2C_CTR_EN        0x80

#define I2C_CTR_IRQ_EN    0x40

#define I2C_TXR_ADR      0xFE

#define I2C_TXR_W        0x00

#define I2C_TXR_R        0x01

#define I2C_CR_STA       0x80

#define I2C_CR_STO       0x40

#define I2C_CR_RD        0x20

#define I2C_CR_WR        0x10

#define I2C_CR_ACK       0x00

#define I2C_CR_NACK      0x08

#define I2C_CR_CLR_IRQ   0x01

#define I2C_SR_R_ACK     0x80

#define I2C_SR_BUSY      0x40

#define I2C_SR_ARB_LOST  0x20

#define I2C_SR_TX_BUSY   0x02

#define I2C_SR_IRQ_FLAG  0x01