3.24_433_RX版本：封装RF433模块，完成开机进入TX/RX模式并在开发板验证成功

Core/Inc/usart.h

@@ -0,0 +1,58 @@
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file    usart.h
+  * @brief   This file contains all the function prototypes for
+  *          the usart.c file
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2024 STMicroelectronics.
+  * All rights reserved.
+  *
+  * This software is licensed under terms that can be found in the LICENSE file
+  * in the root directory of this software component.
+  * If no LICENSE file comes with this software, it is provided AS-IS.
+  *
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __USART_H__
+#define __USART_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+
+/* USER CODE BEGIN Includes */
+typedef enum {
+    FUNC_NONE = 0,
+    FUNC_FEATURE1,
+    FUNC_FEATURE2
+} uart_feature;
+extern uart_feature current_feature;
+
+/* USER CODE END Includes */
+
+extern UART_HandleTypeDef huart1;
+
+/* USER CODE BEGIN Private defines */
+
+/* USER CODE END Private defines */
+
+void MX_USART1_UART_Init(void);
+
+/* USER CODE BEGIN Prototypes */
+void usb_receive_to_tx_send( void );
+/* USER CODE END Prototypes */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __USART_H__ */
+