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  • cube mx uart dma

     

     

    /* USER CODE BEGIN Header */
    /**
      ******************************************************************************
      * @file           : main.c
      * @brief          : Main program body
      ******************************************************************************
      * @attention
      *
      * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
      * All rights reserved.</center></h2>
      *
      * This software component is licensed by ST under BSD 3-Clause license,
      * the "License"; You may not use this file except in compliance with the
      * License. You may obtain a copy of the License at:
      *                        opensource.org/licenses/BSD-3-Clause
      *
      ******************************************************************************
      */
    /* USER CODE END Header */
    /* Includes ------------------------------------------------------------------*/
    #include "main.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 ---------------------------------------------------------*/
    UART_HandleTypeDef huart1;
    DMA_HandleTypeDef hdma_usart1_rx;
    DMA_HandleTypeDef hdma_usart1_tx;
    
    /* USER CODE BEGIN PV */
    
    /* USER CODE END PV */
    
    /* Private function prototypes -----------------------------------------------*/
    void SystemClock_Config(void);
    static void MX_GPIO_Init(void);
    static void MX_DMA_Init(void);
    static void MX_USART1_UART_Init(void);
    /* USER CODE BEGIN PFP */
    
    /* USER CODE END PFP */
    
    /* Private user code ---------------------------------------------------------*/
    /* USER CODE BEGIN 0 */
    // 缓冲数组
    uint8_t tx_buff[] = {0,1,2,3,4,5,6,7,8,9};
    uint8_t rx_buff[10] ;
    volatile uint8_t rx_len=0;
    volatile uint8_t recv_end_flag=0;
    uint8_t rx_buffer[200];
    /* 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_DMA_Init();
      MX_USART1_UART_Init();
      /* USER CODE BEGIN 2 */
        // 开启传输
    HAL_UART_Receive_DMA(&huart1,rx_buff,10);
    HAL_UART_Transmit_DMA(&huart1,tx_buff,10);
      /* USER CODE END 2 */
    
      /* Infinite loop */
      /* USER CODE BEGIN WHILE */
      while (1)
      {
        /* USER CODE END WHILE */
    //if(recv_end_flag ==1)
    //        {
    //        //    printf("rx_len=%d
    ",rx_len);//打印接收长度
                HAL_UART_Transmit(&huart1,rx_buffer, rx_len,10); 
    //            for(uint8_t i=0;i<rx_len;i++)
    //                {
    //                    rx_buffer[i]=0;//清接收缓存
    //                }
    //            rx_len=0;//清除计数
    //            recv_end_flag=0;//清除接收结束标志位
    //        }
            HAL_UART_Receive_DMA(&huart1,rx_buffer,10);//重新打开DMA接收        
      HAL_Delay(1000);
        /* 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};
    
      /** 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 = 15;
      RCC_OscInitStruct.PLL.PLLN = 216;
      RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
      RCC_OscInitStruct.PLL.PLLQ = 4;
      if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
      {
        Error_Handler();
      }
      /** Activate the Over-Drive mode
      */
      if (HAL_PWREx_EnableOverDrive() != 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();
      }
    }
    
    /**
      * @brief USART1 Initialization Function
      * @param None
      * @retval None
      */
    
    static void MX_USART1_UART_Init(void)
    {
    
      /* USER CODE BEGIN USART1_Init 0 */
    
      /* USER CODE END USART1_Init 0 */
    
      /* USER CODE BEGIN USART1_Init 1 */
    
      /* USER CODE END USART1_Init 1 */
      huart1.Instance = USART1;
      huart1.Init.BaudRate = 115200;
      huart1.Init.WordLength = UART_WORDLENGTH_8B;
      huart1.Init.StopBits = UART_STOPBITS_1;
      huart1.Init.Parity = UART_PARITY_NONE;
      huart1.Init.Mode = UART_MODE_TX_RX;
      huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
      huart1.Init.OverSampling = UART_OVERSAMPLING_16;
      if (HAL_UART_Init(&huart1) != HAL_OK)
      {
        Error_Handler();
      }
      /* USER CODE BEGIN USART1_Init 2 */
    // 开启中断
    __HAL_UART_ENABLE_IT( &huart1,UART_IT_IDLE);
        HAL_UART_Receive_DMA(&huart1,rx_buff,10);
      /* USER CODE END USART1_Init 2 */
    
    }
    
    /**
      * Enable DMA controller clock
      */
    static void MX_DMA_Init(void)
    {
    
      /* DMA controller clock enable */
      __HAL_RCC_DMA2_CLK_ENABLE();
    
      /* DMA interrupt init */
      /* DMA2_Stream2_IRQn interrupt configuration */
      HAL_NVIC_SetPriority(DMA2_Stream2_IRQn, 0, 0);
      HAL_NVIC_EnableIRQ(DMA2_Stream2_IRQn);
      /* DMA2_Stream7_IRQn interrupt configuration */
      HAL_NVIC_SetPriority(DMA2_Stream7_IRQn, 0, 0);
      HAL_NVIC_EnableIRQ(DMA2_Stream7_IRQn);
    
    }
    
    /**
      * @brief GPIO Initialization Function
      * @param None
      * @retval None
      */
    static void MX_GPIO_Init(void)
    {
    
      /* GPIO Ports Clock Enable */
      __HAL_RCC_GPIOH_CLK_ENABLE();
      __HAL_RCC_GPIOA_CLK_ENABLE();
    
    }
    
    /* USER CODE BEGIN 4 */
    void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
    {
        __NOP();
     
    }
    /* 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
    ", file, line) */
      /* USER CODE END 6 */
    }
    #endif /* USE_FULL_ASSERT */
    
    // ok
    /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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  • 原文地址:https://www.cnblogs.com/xwtstudio/p/14118384.html
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