i2c.h

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/***************************************************************************/
#ifndef I2C_H_
#define I2C_H_
 
/******************************************************************************/
/***************************** Include Files **********************************/
/******************************************************************************/
 
#include <stdint.h>
 
/******************************************************************************/
/*************************** Types Declarations *******************************/
/******************************************************************************/
 
struct i2c_platform_ops ;
 
typedef struct i2c_init_param {
    uint32_t    max_speed_hz;
    uint8_t     slave_address;
    const struct i2c_platform_ops *platform_ops;
    void        *extra;
} i2c_init_param;
 
typedef struct i2c_desc {
    uint32_t    max_speed_hz;
    uint8_t     slave_address;
    const struct i2c_platform_ops *platform_ops;
    void        *extra;
} i2c_desc;
 
struct i2c_platform_ops {
    int32_t (*i2c_ops_init)(struct i2c_desc **, const struct i2c_init_param *);
    int32_t (*i2c_ops_write)(struct i2c_desc *, uint8_t *, uint8_t, uint8_t);
    int32_t (*i2c_ops_read)(struct i2c_desc *, uint8_t *, uint8_t, uint8_t);
    int32_t (*i2c_ops_remove)(struct i2c_desc *);
};
 
/******************************************************************************/
/************************ Functions Declarations ******************************/
/******************************************************************************/
 
/* Initialize the I2C communication peripheral. */
int32_t i2c_init(struct i2c_desc **desc,
         const struct i2c_init_param *param);
 
/* Free the resources allocated by i2c_init(). */
int32_t i2c_remove(struct i2c_desc *desc);
 
/* Write data to a slave device. */
int32_t i2c_write(struct i2c_desc *desc,
          uint8_t *data,
          uint8_t bytes_number,
          uint8_t stop_bit);
 
/* Read data from a slave device. */
int32_t i2c_read(struct i2c_desc *desc,
         uint8_t *data,
         uint8_t bytes_number,
         uint8_t stop_bit);
 
#endif // I2C_H_