modbus_slicer.h

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#ifndef MODBUS_SLICER_H
#define MODBUS_SLICER_H
 
#include "slab_pool.h"
 
#include <stdint.h>
 
typedef enum {
    MODBUS_SLICER_OK = 0,         
    MODBUS_SLICER_ERROR_CRC,      
    MODBUS_SLICER_ERROR_OVERFLOW, 
    MODBUS_SLICER_ERROR_NO_MEM    
} modbus_slicer_error_t;
 
typedef enum {
    MODBUS_SLICER_STATE_IDLE,     
    MODBUS_SLICER_STATE_RECEIVING 
} modbus_slicer_state_t;
 
typedef struct {
    slab_pool_t *slab_ptr;       
    int64_t timestamp_us;        
    modbus_slicer_error_t error; 
} modbus_slicer_frame_t;
 
typedef struct {
    uint32_t baudrate;                  
    uint8_t bit_length;                 
    int64_t (*get_time_us_func) (void); 
    void (*on_frame_func) (const modbus_slicer_frame_t *, void *); 
    void *cb_arg_void_ptr;                                         
} modbus_slicer_config_t;
 
typedef struct {
    modbus_slicer_config_t *config_ptr; 
    slab_pool_t *slab_ptr;              
    int64_t start_timestamp_us;         
    int64_t last_byte_timestamp_us;     
    int64_t t3_5_us;                    
} modbus_slicer_t;
 
void modbus_slicer_init (modbus_slicer_t *slicer_ptr, modbus_slicer_config_t *config_ptr);
 
void modbus_slicer_feed (modbus_slicer_t *slicer_ptr,
                         const uint8_t *data_ptr,
                         size_t length,
                         int64_t timestamp_us);
 
void modbus_slicer_timeout (modbus_slicer_t *slicer_ptr);
 
void modbus_slicer_check_timeout (modbus_slicer_t *slicer_ptr);
 
#endif