nhal_i2c_types.h

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#ifndef NHAL_I2C_TYPES_H
#define NHAL_I2C_TYPES_H
 
#include <stddef.h>
#include <stdint.h>
 
#include "nhal_common.h"
 
typedef uint8_t nhal_i2c_bus_id;
typedef uint16_t nhal_i2c_address;
 
struct nhal_i2c_config{
    uint32_t clock_speed_hz;
    struct nhal_i2c_impl_config * impl_config;
};
 
struct nhal_i2c_context{
    nhal_i2c_bus_id      i2c_bus_id;
 
    struct nhal_i2c_impl_ctx * impl_ctx;
 
    // Async extensions handled separately in async context
};
 
 
typedef enum {
    NHAL_I2C_TRANSFER_MSG_WRITE        = 1, 
    NHAL_I2C_TRANSFER_MSG_READ         = 1<<1, 
    NHAL_I2C_TRANSFER_MSG_TEN_BIT_ADDR = 1<<2, 
    NHAL_I2C_TRANSFER_MSG_NO_START     = 1<<3, 
    NHAL_I2C_TRANSFER_MSG_NO_STOP      = 1<<4, 
    NHAL_I2C_TRANSFER_MSG_NO_ADDR      = 1<<5  
} nhal_i2c_transfer_bit_flags_t;
 
typedef struct {
    nhal_i2c_address address;             
    uint16_t flags;            
    union {
        struct {
            uint8_t *buffer;           
            size_t length;             
        } read;
        struct {
            const uint8_t *bytes;      
            size_t length;             
        } write;
    };
} nhal_i2c_transfer_op_t;
 
#endif /* NHAL_I2C_TYPES_H */