实验目标同时使用USART1和USART2(1)串口1收到数据→转发给串口2(2)串口2收到数据→转发给串口1引脚配置如下图所示两个串口都要引脚使能主程序为/* USER CODE BEGIN Header */ /** ****************************************************************************** * file : main.c * brief : Main program body ****************************************************************************** * attention * * Copyright (c) 2026 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 */ /* Includes ------------------------------------------------------------------*/ #include main.h #include usart.h #include gpio.h /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include stdio.h //使用 printf #include string.h //使用 strncmp /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ #define LENGTH 64//接受缓冲区大小 /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ /* USER CODE BEGIN PV */ uint8_t RxBuff1[LENGTH];//接受缓冲区 uint8_t RxBuff2[LENGTH];//接受缓冲区 /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); /* USER CODE BEGIN PFP */ void USART_SendString(UART_HandleTypeDef *huart, char *str); /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ /** * brief The application entry point. * retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_USART1_UART_Init(); MX_USART2_UART_Init(); /* USER CODE BEGIN 2 */ HAL_UARTEx_ReceiveToIdle_IT(huart1 , RxBuff1 , LENGTH); //启用接收中断 HAL_UARTEx_ReceiveToIdle_IT(huart2 , RxBuff2 , LENGTH); //启用接收中断 /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ } /** * brief System Clock Configuration * retval None */ void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct {0}; /** Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. */ RCC_OscInitStruct.OscillatorType RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState RCC_HSE_ON; RCC_OscInitStruct.HSEPredivValue RCC_HSE_PREDIV_DIV1; RCC_OscInitStruct.HSIState RCC_HSI_ON; RCC_OscInitStruct.PLL.PLLState RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLMUL RCC_PLL_MUL9; if (HAL_RCC_OscConfig(RCC_OscInitStruct) ! HAL_OK) { Error_Handler(); } /** Initializes the CPU, AHB and APB buses clocks */ RCC_ClkInitStruct.ClockType RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider RCC_HCLK_DIV2; RCC_ClkInitStruct.APB2CLKDivider RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig(RCC_ClkInitStruct, FLASH_LATENCY_2) ! HAL_OK) { Error_Handler(); } } /* USER CODE BEGIN 4 */ void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size) { if(huart - Instance USART1) { USART_SendString(huart1,[USART1 收到数据] - 正在转发到 USART2...\r\n); HAL_UART_Transmit_IT(huart2,RxBuff1,Size); USART_SendString(huart1,[USART1]数据转发完成 \r\n); HAL_UARTEx_ReceiveToIdle_IT(huart1 , RxBuff1 , LENGTH); } else if(huart - Instance USART2) { USART_SendString(huart1,[USART2 收到数据] - 正在转发到 USART1...\r\n); HAL_UART_Transmit_IT(huart1,RxBuff2,Size); USART_SendString(huart2,[USART2]数据转发完成 \r\n); HAL_UARTEx_ReceiveToIdle_IT(huart2 , RxBuff2 , LENGTH); } } void USART_SendString(UART_HandleTypeDef *huart, char *str) { while(*str) { HAL_UART_Transmit(huart,(uint8_t *)str,1,HAL_MAX_DELAY); str; } } /* USER CODE END 4 */ /** * brief This function is executed in case of error occurrence. * retval None */ void Error_Handler(void) { /* USER CODE BEGIN Error_Handler_Debug */ /* User can add his own implementation to report the HAL error return state */ __disable_irq(); while (1) { } /* USER CODE END Error_Handler_Debug */ } #ifdef USE_FULL_ASSERT /** * brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * param file: pointer to the source file name * param line: assert_param error line source number * retval None */ void assert_failed(uint8_t *file, uint32_t line) { /* USER CODE BEGIN 6 */ /* User can add his own implementation to report the file name and line number, ex: printf(Wrong parameters value: file %s on line %d\r\n, file, line) */ /* USER CODE END 6 */ } #endif /* USE_FULL_ASSERT */实验结果