Basic Framework

app_tasks.h

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+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file           : app_tasks.h
+  * @brief          : Header for ModTOS (Modbus RTU slave task).
+  *
+  * Declares core symbols for the Modbus driver running in FreeRTOS context.
+  * Author: Scott Leonard
+  * License: Unlicense
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+
+#ifndef __APP_TASKS_H
+#define __APP_TASKS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "main.h"
+#include "cmsis_os.h"
+#include <stdint.h>
+
+/* Shared buffers and register table */
+extern uint8_t  request_frame[];
+extern uint8_t  response_frame[];
+extern uint16_t modbus_table[];
+
+/* Task entry point */
+void app_task_Modbus(void);
+
+/* Core Modbus driver functions */
+void rs485_dir_tx(void);
+void rs485_dir_rx(void);
+uint16_t calculate_modbus_crc(uint8_t *data, uint16_t length);
+void send_modbus_data(uint8_t *data, int size);
+void modbus_exception(uint8_t exception_code);
+uint8_t table_read(void);
+uint8_t table_write(void);
+void process_modbus_message(uint16_t size);
+void init_modbus_system(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __APP_TASKS_H */