Modbus TCP - Multi Devices

2026-04-14 14:41:00 -05:00
commit 894d35a256
1483 changed files with 238546 additions and 0 deletions
--- a/main/modbus_memory.h
+++ b/main/modbus_memory.h
@@ -0,0 +1,131 @@
+#ifndef MODBUS_MEMORY_H
+#define MODBUS_MEMORY_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+typedef enum
+{
+    MB_MEM_COIL = 0,
+    MB_MEM_DISCRETE_INPUT,
+    MB_MEM_INPUT_REGISTER,
+    MB_MEM_HOLDING_REGISTER
+} modbus_mem_type_t;
+
+typedef struct modbus_db modbus_db_t;
+
+typedef struct
+{
+    modbus_db_t *db;
+} modbus_memory_t;
+
+/* ---------------------------------------------------- */
+/* Init / deinit */
+/* ---------------------------------------------------- */
+
+bool modbus_memory_init(modbus_memory_t *mem, modbus_db_t *db);
+void modbus_memory_deinit(modbus_memory_t *mem);
+
+/* Clear all runtime point values back to 0 */
+void modbus_memory_reset(modbus_memory_t *mem);
+
+/* ---------------------------------------------------- */
+/* Single-point access helpers */
+/* ---------------------------------------------------- */
+
+bool modbus_memory_read_coil(modbus_memory_t *mem, uint16_t offset, uint8_t *value);
+bool modbus_memory_write_coil(modbus_memory_t *mem, uint16_t offset, uint8_t value);
+
+bool modbus_memory_read_discrete_input(modbus_memory_t *mem, uint16_t offset, uint8_t *value);
+bool modbus_memory_write_discrete_input(modbus_memory_t *mem, uint16_t offset, uint8_t value);
+
+bool modbus_memory_read_input_register(modbus_memory_t *mem, uint16_t offset, uint16_t *value);
+bool modbus_memory_write_input_register(modbus_memory_t *mem, uint16_t offset, uint16_t value);
+
+bool modbus_memory_read_holding_register(modbus_memory_t *mem, uint16_t offset, uint16_t *value);
+bool modbus_memory_write_holding_register(modbus_memory_t *mem, uint16_t offset, uint16_t value);
+
+/* ---------------------------------------------------- */
+/* Generic access helpers */
+/* ---------------------------------------------------- */
+
+bool modbus_memory_read_bit(modbus_memory_t *mem,
+                            modbus_mem_type_t type,
+                            uint16_t offset,
+                            uint8_t *value);
+
+bool modbus_memory_write_bit(modbus_memory_t *mem,
+                             modbus_mem_type_t type,
+                             uint16_t offset,
+                             uint8_t value);
+
+bool modbus_memory_read_reg(modbus_memory_t *mem,
+                            modbus_mem_type_t type,
+                            uint16_t offset,
+                            uint16_t *value);
+
+bool modbus_memory_write_reg(modbus_memory_t *mem,
+                             modbus_mem_type_t type,
+                             uint16_t offset,
+                             uint16_t value);
+
+/* ---------------------------------------------------- */
+/* Multi-point access helpers */
+/* ---------------------------------------------------- */
+
+bool modbus_memory_read_coils(modbus_memory_t *mem,
+                              uint16_t start_offset,
+                              uint16_t quantity,
+                              uint8_t *dest);
+
+bool modbus_memory_write_coils(modbus_memory_t *mem,
+                               uint16_t start_offset,
+                               uint16_t quantity,
+                               const uint8_t *src);
+
+bool modbus_memory_read_discrete_inputs(modbus_memory_t *mem,
+                                        uint16_t start_offset,
+                                        uint16_t quantity,
+                                        uint8_t *dest);
+
+bool modbus_memory_write_discrete_inputs(modbus_memory_t *mem,
+                                         uint16_t start_offset,
+                                         uint16_t quantity,
+                                         const uint8_t *src);
+
+bool modbus_memory_read_input_registers(modbus_memory_t *mem,
+                                        uint16_t start_offset,
+                                        uint16_t quantity,
+                                        uint16_t *dest);
+
+bool modbus_memory_write_input_registers(modbus_memory_t *mem,
+                                         uint16_t start_offset,
+                                         uint16_t quantity,
+                                         const uint16_t *src);
+
+bool modbus_memory_read_holding_registers(modbus_memory_t *mem,
+                                          uint16_t start_offset,
+                                          uint16_t quantity,
+                                          uint16_t *dest);
+
+bool modbus_memory_write_holding_registers(modbus_memory_t *mem,
+                                           uint16_t start_offset,
+                                           uint16_t quantity,
+                                           const uint16_t *src);
+
+/* ---------------------------------------------------- */
+/* Utility helpers */
+/* ---------------------------------------------------- */
+
+bool modbus_memory_valid_bit_range(modbus_memory_t *mem,
+                                   modbus_mem_type_t type,
+                                   uint16_t start_offset,
+                                   uint16_t quantity);
+
+bool modbus_memory_valid_reg_range(modbus_memory_t *mem,
+                                   modbus_mem_type_t type,
+                                   uint16_t start_offset,
+                                   uint16_t quantity);
+
+#endif /* MODBUS_MEMORY_H */