Modbus TCP - Multi Devices

main/modbus_points.h

@@ -0,0 +1,112 @@
+#ifndef MODBUS_POINTS_H
+#define MODBUS_POINTS_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+#include "modbus_memory.h"
+
+#define MODBUS_MAX_POINTS       384
+#define MODBUS_MAX_NAME_LEN     32
+#define MODBUS_MAX_NOTES_LEN    64
+#define MODBUS_MAX_CSV_LINE_LEN 256
+
+typedef enum
+{
+    MB_POINT_COIL = 0,
+    MB_POINT_DISCRETE_INPUT,
+    MB_POINT_INPUT_REGISTER,
+    MB_POINT_HOLDING_REGISTER,
+    MB_POINT_INVALID
+} modbus_point_type_t;
+
+typedef enum
+{
+    MB_DATA_BOOL = 0,
+    MB_DATA_UINT16,
+    MB_DATA_UINT32,
+    MB_DATA_FLOAT,
+    MB_DATA_DOUBLE,
+    MB_DATA_INVALID
+} modbus_data_type_t;
+
+typedef enum
+{
+    PICS_DATA_NONE = 0,
+    PICS_DATA_BOOLEAN,
+    PICS_DATA_INTEGER,   /* PICS Integer = 32-bit */
+    PICS_DATA_FLOAT,     /* PICS Float = 64-bit double */
+    PICS_DATA_STRING,
+    PICS_DATA_INVALID
+} pics_data_type_t;
+
+typedef struct modbus_point
+{
+    modbus_point_type_t type;
+    uint32_t raw_address;
+    uint16_t offset;
+
+    char name[MODBUS_MAX_NAME_LEN];
+    modbus_data_type_t data_type;
+
+    uint8_t reg_span;
+    bool is_helper;
+
+    bool has_control_address;
+    uint32_t control_raw_address;
+    modbus_point_type_t control_type;
+    uint16_t control_offset;
+
+    bool has_pics_address;
+    uint32_t pics_raw_address;
+    modbus_point_type_t pics_type;
+    uint16_t pics_offset;
+    pics_data_type_t pics_data_type;
+    uint8_t pics_reg_span;
+
+    uint16_t pics_words[4];
+
+    char notes[MODBUS_MAX_NOTES_LEN];
+
+    uint8_t bit_value;
+    uint16_t reg_value;
+} modbus_point_t;
+
+typedef struct modbus_db
+{
+    modbus_point_t points[MODBUS_MAX_POINTS];
+    size_t count;
+} modbus_db_t;
+
+/* Initialize / clear point database */
+void modbus_points_init(modbus_db_t *db);
+void modbus_points_reset(modbus_db_t *db);
+
+/* Load points from CSV */
+bool modbus_points_load(modbus_db_t *db, const char *filename);
+
+/* Lookup helpers */
+const modbus_point_t *modbus_points_find_by_name(const modbus_db_t *db,
+                                                 const char *name);
+
+const modbus_point_t *modbus_points_find_by_type_offset(const modbus_db_t *db,
+                                                        modbus_point_type_t type,
+                                                        uint16_t offset);
+
+/* Optional helpers for PICS staging lookup */
+const modbus_point_t *modbus_points_find_by_pics_offset(const modbus_db_t *db,
+                                                        modbus_point_type_t type,
+                                                        uint16_t offset);
+
+const modbus_point_t *modbus_points_find_by_pics_range(const modbus_db_t *db,
+                                                       modbus_point_type_t type,
+                                                       uint16_t offset);
+
+/* Helpers */
+modbus_mem_type_t modbus_points_type_to_mem(modbus_point_type_t type);
+bool modbus_points_is_bit_type(modbus_point_type_t type);
+bool modbus_points_is_reg_type(modbus_point_type_t type);
+bool modbus_points_is_writable_type(modbus_point_type_t type);
+
+#endif /* MODBUS_POINTS_H */