CubeMx设置串口
设置PB11和PB10为串口3的GPIO
设置波特率
设置中断
开启发送接收DMA
编写测试代码
/* 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"dma.h"#include"usart.h"#include"gpio.h"/* Private includes ----------------------------------------------------------*//* USER CODE BEGIN Includes *//* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*//* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*//* USER CODE BEGIN PD *//* USER CODE END PD *//* Private macro -------------------------------------------------------------*//* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*//* USER CODE BEGIN PV */uint8_tRX_Buff_FLAG=0;uint8_tRX_Buff[300]={0};uint8_tTX_Buff[300]={0};intRX_Length=0;/* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/voidSystemClock_Config(void);/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*//* USER CODE BEGIN 0 */// 串口接收空闲函数voidHAL_UARTEx_RxEventCallback(UART_HandleTypeDef*huart,uint16_tSize){if(huart==&huart3){RX_Buff_FLAG=1;RX_Length=300-__HAL_DMA_GET_COUNTER(huart->hdmarx);HAL_UARTEx_ReceiveToIdle_DMA(&huart3,RX_Buff,300);}}/* USER CODE END 0 *//** * @brief The application entry point. * @retval int */intmain(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_DMA_Init();MX_USART3_UART_Init();/* USER CODE BEGIN 2 */// 启动串口DMA接收HAL_UARTEx_ReceiveToIdle_DMA(&huart3,RX_Buff,300);/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while(1){HAL_GPIO_WritePin(GPIOF,GPIO_PIN_6,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOF,GPIO_PIN_7,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOF,GPIO_PIN_8,GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOF,GPIO_PIN_9,GPIO_PIN_SET);HAL_Delay(100);HAL_GPIO_WritePin(GPIOF,GPIO_PIN_6,GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOF,GPIO_PIN_7,GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOF,GPIO_PIN_8,GPIO_PIN_RESET);HAL_GPIO_WritePin(GPIOF,GPIO_PIN_9,GPIO_PIN_RESET);HAL_Delay(100);// 发送数据TX_Buff[0]=0x01;TX_Buff[1]=0x02;TX_Buff[2]=0x03;TX_Buff[4]=RX_Buff[0];TX_Buff[5]=RX_Buff[1];TX_Buff[6]=RX_Buff[2];HAL_UART_Transmit_DMA(&huart3,TX_Buff,10);/* USER CODE END WHILE *//* USER CODE BEGIN 3 */}/* USER CODE END 3 */}/** * @brief System Clock Configuration * @retval None */voidSystemClock_Config(void){RCC_OscInitTypeDef RCC_OscInitStruct={0};RCC_ClkInitTypeDef RCC_ClkInitStruct={0};/** Configure the main internal regulator output voltage */__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);/** 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.PLL.PLLState=RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource=RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM=4;RCC_OscInitStruct.PLL.PLLN=168;RCC_OscInitStruct.PLL.PLLP=RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ=4;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_DIV4;RCC_ClkInitStruct.APB2CLKDivider=RCC_HCLK_DIV2;if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct,FLASH_LATENCY_5)!=HAL_OK){Error_Handler();}}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//** * @brief This function is executed in case of error occurrence. * @retval None */voidError_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 */}#ifdefUSE_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 */voidassert_failed(uint8_t*file,uint32_tline){/* 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 */代码运行结果
串口工具接收和发送数据
01 02 03 00 00 00 00 00 00 00 01 02 03 00 00 00 00 00 00 00 01 02 03 00 00 00 00 00 00 00 01 02 03 00 00 00 00 00 00 00 01 02 03 00 00 00 00 00 00 00 01 02 03 00 00 00 00 00 00 00 01 02 03 00 00 00 00 00 00 00 01 02 03 00 00 00 00 00 00 00 01 02 03 04 05 06 01 02 03 00 01 02 03 00 00 00 01 02 03 00 01 02 03 00 00 00 01 02 03 00 01 02 03 00 00 00 01 02 03 00 01 02 03 00 00 00 01 02 03 00 01 02 03 00 00 00 01 02 03 00 01 02 03 00 00 00 01 02 03 00 01 02 03 00 00 00 01 02 03 00 01 02 03 00 00 00 01 02 03 00 01 02 03 00 00 00 01 02 03 00 01 02 03 00 00 00示例工程
https://download.csdn.net/download/hmxm6/93126339
 quick-start)
