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#ifndef __I2C0_H

#define __I2C0_H

#include "i2c.h"

extern volatile u32 I2C0_Timeout;

// current I2C state

extern volatile u8 I2C0_State;

// the last I2C error

extern volatile u8 I2C0_Error;

#define I2C0_TIMEOUT 500 // 500 ms

// define the size of the rx/tx buffer

#define I2C0_Buffer_LEN 100

// transfer buffer should be filled after a successful

// I2C_LockBuffer(...) and before a start of transmission

// initiated by  I2C_Transmission(...).

extern volatile u8 I2C0_Buffer[];

void I2C0_Init(void);

void I2C0_Deinit(void);

// the pointer to the rxbuffer handler function

// called by the IRQ routine after all bytes are recieved from slave

// Initiate i2c transmission

// A transmission sends first TxBytes from I2C_Buffer0 to slave

// and then RxBytes are read from slave to I2C_Buffer0

// replacing the byte that have been sent.

// Then the RxHandler function is called to handle the result.

// This function returns imediatly after a start condition.

// returns 1 if a transmission has been started, otherwise 0

u8 I2C0_Transmission(u8 SlaveAddr, u8 TxBytes, I2C_pRxHandler_t pRxHandler, u8 RxBytes);

// try to allocate the I2C_Buffer0 within the timeout limit

// returns 1 on success

u8 I2C0_LockBuffer(u32 timeout);

// wait until transmission progess is finished or timeout

// returns 1 if no timeout occurs

u8 I2C0_WaitForEndOfTransmission(u32 timeout);

#endif // I2C_H