![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250420230721-68057e29ddc53.png\")
<\/h3>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250420230722-68057e2a93c60.png\")
<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250420230723-68057e2b4f763.png\")
<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250420230724-68057e2c0925b.png\")
<\/p>\n
uint8_t buffer[10]={0}; <\/p>\n
HAL_UART_Receive_DMA(&huart4,buffer,5); \/\/\u6253\u5f00\u4e32\u53e3DMA\u63a5\u6536，\u6b64\u5904\u662f\u63a5\u65365\u4e2a\u6570\u636e，\u5b58\u5165\u5230buffer\u8fd9\u4e2a\u6570\u7ec4\u4e2d
\n__HAL_UART_ENABLE_IT(&huart4,UART_IT_IDLE); \/\/\u5f00\u542f\u7a7a\u95f2\u4e2d\u65ad，\u8fdb\u5165\u7a7a\u95f2\u5c31\u6253\u5f00\u4e2d\u65ad <\/p>\n
\u6ce8\u610f：__HAL_DMA_GET_COUNTER\u51fd\u6570\u83b7\u53d6DMA\u4e2d\u672a\u4f20\u8f93\u7684\u6570\u636e\u4e2a\u6570，\u6240\u4ee5\u8981\u8ba1\u7b97DMA\u63a5\u6536\u5230\u4e86\u591a\u5c11\u4e2a\u6570，\u9700\u8981\u7528\u5b9a\u4e49\u63a5\u6536\u7684\u6570\u7ec4\u5927\u5c0f\u51cf\u53bb\u8be5\u51fd\u6570\u8fd4\u56de\u503c\u3002<\/p>\n
void USART3_4_IRQHandler(void)
\n{
\n \/* USER CODE BEGIN USART3_4_IRQn 0 *\/
\n if(__HAL_UART_GET_FLAG(&huart4,UART_FLAG_IDLE) != RESET) \/\/\u8fdb\u5165\u7a7a\u95f2\u72b6\u6001\u89e6\u53d1\u5f53\u524d\u4e2d\u65ad
\n {
\n __HAL_UART_CLEAR_IDLEFLAG(&huart4); \/\/\u6e05\u9664\u7a7a\u95f2\u4e2d\u65ad\u6807\u5fd7\u4f4d
\n HAL_UART_DMAStop(&huart4); \/\/\u505c\u6b62DMA，\u8fdb\u5165\u4e00\u6b21\u7a7a\u95f2\u4e2d\u65ad\u8868\u793aDMA\u4f20\u8f93\u5b8c\u6210
\n uint8_t len = 10 – __HAL_DMA_GET_COUNTER(huart4.hdmarx); \/\/\u5b9e\u9645\u4e0a\u63a5\u6536\u5230\u7684\u6570\u636e
\n HAL_UART_Transmit_DMA(&huart4,buffer,len); \/\/\u53d1\u9001\u6570\u636e\u5230\u4e32\u53e3
\n HAL_UART_Receive_DMA(&huart4,buffer, 5); \/\/\u6253\u5f00DMA\u518d\u4e00\u6b21\u63a5\u6536\u6570\u636e
\n }
\n \/* USER CODE END USART3_4_IRQn 0 *\/
\n HAL_UART_IRQHandler(&huart4);
\n \/* USER CODE BEGIN USART3_4_IRQn 1 *\/<\/p>\n
\/* USER CODE END USART3_4_IRQn 1 *\/
\n} <\/p>\n
\/* USER CODE BEGIN Header *\/
\n\/**
\n ******************************************************************************
\n * @file : main.c
\n * @brief : Main program body
\n ******************************************************************************
\n * @attention
\n *
\n * Copyright (c) 2025 STMicroelectronics.
\n * All rights reserved.
\n *
\n * This software is licensed under terms that can be found in the LICENSE file
\n * in the root directory of this software component.
\n * If no LICENSE file comes with this software, it is provided AS-IS.
\n *
\n ******************************************************************************
\n *\/
\n\/* USER CODE END Header *\/
\n\/* Includes ——————————————————————*\/
\n#include "main.h"
\n#include "dma.h"
\n#include "usart.h"
\n#include "gpio.h"<\/p>\n
\/* Private includes ———————————————————-*\/
\n\/* USER CODE BEGIN Includes *\/<\/p>\n
\/* USER CODE END Includes *\/<\/p>\n
\/* Private typedef ———————————————————–*\/
\n\/* USER CODE BEGIN PTD *\/<\/p>\n
\/* USER CODE END PTD *\/<\/p>\n
\/* Private define ————————————————————*\/
\n\/* USER CODE BEGIN PD *\/<\/p>\n
\/* USER CODE END PD *\/<\/p>\n
\/* Private macro ————————————————————-*\/
\n\/* USER CODE BEGIN PM *\/<\/p>\n
\/* USER CODE END PM *\/<\/p>\n
\/* Private variables ———————————————————*\/<\/p>\n
\/* USER CODE BEGIN PV *\/<\/p>\n
\/* USER CODE END PV *\/<\/p>\n
\/* Private function prototypes ———————————————–*\/
\nvoid SystemClock_Config(void);
\n\/* USER CODE BEGIN PFP *\/<\/p>\n
\/* USER CODE END PFP *\/<\/p>\n
\/* Private user code ———————————————————*\/
\n\/* USER CODE BEGIN 0 *\/
\nuint8_t buffer[10]={0};<\/p>\n
\/**
\n * @brief This function handles USART3 and USART4 interrupts.
\n *\/
\nvoid USART3_4_IRQHandler(void)
\n{
\n \/* USER CODE BEGIN USART3_4_IRQn 0 *\/
\n if(__HAL_UART_GET_FLAG(&huart4,UART_FLAG_IDLE) != RESET) \/\/\u8fdb\u5165\u7a7a\u95f2\u72b6\u6001\u89e6\u53d1\u5f53\u524d\u4e2d\u65ad
\n {
\n __HAL_UART_CLEAR_IDLEFLAG(&huart4); \/\/\u6e05\u9664\u7a7a\u95f2\u4e2d\u65ad\u6807\u5fd7\u4f4d
\n HAL_UART_DMAStop(&huart4); \/\/\u505c\u6b62DMA，\u8fdb\u5165\u4e00\u6b21\u7a7a\u95f2\u4e2d\u65ad\u8868\u793aDMA\u4f20\u8f93\u5b8c\u6210
\n uint8_t len = 10 – __HAL_DMA_GET_COUNTER(huart4.hdmarx); \/\/\u5b9e\u9645\u4e0a\u63a5\u6536\u5230\u7684\u6570\u636e
\n HAL_UART_Transmit_DMA(&huart4,buffer,len); \/\/\u53d1\u9001\u6570\u636e\u5230\u4e32\u53e3
\n HAL_UART_Receive_DMA(&huart4,buffer, 5); \/\/\u6253\u5f00DMA\u518d\u4e00\u6b21\u63a5\u6536\u6570\u636e
\n }
\n \/* USER CODE END USART3_4_IRQn 0 *\/
\n HAL_UART_IRQHandler(&huart4);
\n \/* USER CODE BEGIN USART3_4_IRQn 1 *\/<\/p>\n
\/* USER CODE END USART3_4_IRQn 1 *\/
\n}<\/p>\n
\/* USER CODE END 0 *\/<\/p>\n
\/**
\n * @brief The application entry point.
\n * @retval int
\n *\/
\nint main(void)
\n{<\/p>\n
\/* USER CODE BEGIN 1 *\/<\/p>\n
\/* USER CODE END 1 *\/<\/p>\n
\/* MCU Configuration——————————————————–*\/<\/p>\n
\/* Reset of all peripherals, Initializes the Flash interface and the Systick. *\/
\n HAL_Init();<\/p>\n
\/* USER CODE BEGIN Init *\/<\/p>\n
\/* USER CODE END Init *\/<\/p>\n
\/* Configure the system clock *\/
\n SystemClock_Config();<\/p>\n
\/* USER CODE BEGIN SysInit *\/<\/p>\n
\/* USER CODE END SysInit *\/<\/p>\n
\/* Initialize all configured peripherals *\/
\n MX_GPIO_Init();
\n MX_DMA_Init();
\n MX_USART4_UART_Init();
\n \/* USER CODE BEGIN 2 *\/<\/p>\n
HAL_UART_Receive_DMA(&huart4,buffer,5); \/\/\u6253\u5f00\u4e32\u53e3DMA\u63a5\u6536，\u6b64\u5904\u662f\u63a5\u65365\u4e2a\u6570\u636e，\u5b58\u5165\u5230buffer\u8fd9\u4e2a\u6570\u7ec4\u4e2d
\n __HAL_UART_ENABLE_IT(&huart4,UART_IT_IDLE); \/\/\u5f00\u542f\u7a7a\u95f2\u4e2d\u65ad，\u8fdb\u5165\u7a7a\u95f2\u5c31\u6253\u5f00\u4e2d\u65ad<\/p>\n
\/* USER CODE END 2 *\/<\/p>\n
\/* Infinite loop *\/
\n \/* USER CODE BEGIN WHILE *\/
\n while (1)
\n {
\n \/* USER CODE END WHILE *\/<\/p>\n
\/* USER CODE BEGIN 3 *\/
\n }
\n \/* USER CODE END 3 *\/
\n}<\/p>\n
\/**
\n * @brief System Clock Configuration
\n * @retval None
\n *\/
\nvoid SystemClock_Config(void)
\n{
\n RCC_OscInitTypeDef RCC_OscInitStruct = {0};
\n RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};<\/p>\n
\/** Configure the main internal regulator output voltage
\n *\/
\n HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);<\/p>\n
\/** Initializes the RCC Oscillators according to the specified parameters
\n * in the RCC_OscInitTypeDef structure.
\n *\/
\n RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
\n RCC_OscInitStruct.HSIState = RCC_HSI_ON;
\n RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
\n RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
\n RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
\n if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
\n {
\n Error_Handler();
\n }<\/p>\n
\/** Initializes the CPU, AHB and APB buses clocks
\n *\/
\n RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
\n |RCC_CLOCKTYPE_PCLK1;
\n RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
\n RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
\n RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;<\/p>\n
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
\n {
\n Error_Handler();
\n }
\n}<\/p>\n
\/* USER CODE BEGIN 4 *\/<\/p>\n
\/* USER CODE END 4 *\/<\/p>\n
\/**
\n * @brief This function is executed in case of error occurrence.
\n * @retval None
\n *\/
\nvoid Error_Handler(void)
\n{
\n \/* USER CODE BEGIN Error_Handler_Debug *\/
\n \/* User can add his own implementation to report the HAL error return state *\/
\n __disable_irq();
\n while (1)
\n {
\n }
\n \/* USER CODE END Error_Handler_Debug *\/
\n}<\/p>\n
#ifdef USE_FULL_ASSERT
\n\/**
\n * @brief Reports the name of the source file and the source line number
\n * where the assert_param error has occurred.
\n * @param file: pointer to the source file name
\n * @param line: assert_param error line source number
\n * @retval None
\n *\/
\nvoid assert_failed(uint8_t *file, uint32_t line)
\n{
\n \/* USER CODE BEGIN 6 *\/
\n \/* User can add his own implementation to report the file name and line number,
\n ex: printf("Wrong parameters value: file %s on line %d\\\\r\\\\n", file, line) *\/
\n \/* USER CODE END 6 *\/
\n}
\n#endif \/* USE_FULL_ASSERT *\/<\/p>\n
\u4e32\u53e3\u53d1\u9001\u4ec0\u4e48\u6570\u636e\u5c31\u63a5\u6536\u5230\u4ec0\u4e48\u6570\u636e\u3002<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250420230724-68057e2cb82ba.png\")
<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb968\u6b21\uff0c\u70b9\u8d5e7\u6b21\uff0c\u6536\u85cf5\u6b21\u3002\u51fd\u6570\u83b7\u53d6DMA\u4e2d\u672a\u4f20\u8f93\u7684\u6570\u636e\u4e2a\u6570\uff0c\u6240\u4ee5\u8981\u8ba1\u7b97DMA\u63a5\u6536\u5230\u4e86\u591a\u5c11\u4e2a\u6570\uff0c\u9700\u8981\u7528\u5b9a\u4e49\u63a5\u6536\u7684\u6570\u7ec4\u5927\u5c0f\u51cf\u53bb\u8be5\u51fd\u6570\u8fd4\u56de\u503c\u3002\u4e32\u53e3\u53d1\u9001\u4ec0\u4e48\u6570\u636e\u5c31\u63a5\u6536\u5230\u4ec0\u4e48\u6570\u636e\u3002_stm32cubemx dma \u4e32\u53e3\u7a7a\u95f2\u4e2d\u65ad<\/p>\n","protected":false},"author":2,"featured_media":31021,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[217,270,269],"topic":[],"class_list":["post-31026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-stm32","tag-270","tag-269"],"yoast_head":"\n