stm32f103vet6 hal库编写串口通信中断接收DMA发送

以下是使用HAL库编写串口通信中断接收DMA发送的示例代码：

#include "stm32f1xx_hal.h"

UART_HandleTypeDef huart1;
DMA_HandleTypeDef hdma_usart1_tx;
DMA_HandleTypeDef hdma_usart1_rx;

uint8_t tx_buffer[50];
uint8_t rx_buffer[50];

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_USART1_UART_Init(void);

/* USART1 init function */
static void MX_USART1_UART_Init(void)
{

  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();
  }

}

/* DMA init function */
static void MX_DMA_Init(void)
{

  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel4_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel4_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel4_IRQn);
  /* DMA1_Channel5_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel5_IRQn);

}

/* GPIO init function */
static void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

}

/* System Clock Configuration */
void SystemClock_Config(void)
{

  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;

  /**Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /**Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }

}

/* USART1 DMA Transmit Complete callback */
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
  /* DMA transmit complete callback */
}

/* USART1 DMA Receive Complete callback */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  /* DMA receive complete callback */
}

/* USART1 Error callback */
void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
  /* UART error callback */
}

int main(void)
{

  HAL_Init();

  SystemClock_Config();

  MX_GPIO_Init();
  MX_DMA_Init();
  MX_USART1_UART_Init();

  /* Enable USART1 DMA TX and RX interrupts */
  __HAL_UART_ENABLE_IT(&huart1, UART_IT_TC);
  __HAL_UART_ENABLE_IT(&huart1, UART_IT_RXNE);

  /* Start USART1 reception */
  HAL_UART_Receive_DMA(&huart1, rx_buffer, 50);

  while (1)
  {
    /* Wait for USART1 reception */
    if (HAL_UART_GetState(&huart1) == HAL_UART_STATE_READY)
    {
      /* Copy received data to transmit buffer */
      memcpy(tx_buffer, rx_buffer, sizeof(rx_buffer));

      /* Start USART1 transmission */
      HAL_UART_Transmit_DMA(&huart1, tx_buffer, sizeof(tx_buffer));
    }
  }

}

/* DMA1_Channel4_IRQn interrupt handler */
void DMA1_Channel4_IRQHandler(void)
{
  HAL_DMA_IRQHandler(&hdma_usart1_tx);
}

/* DMA1_Channel5_IRQn interrupt handler */
void DMA1_Channel5_IRQHandler(void)
{
  HAL_DMA_IRQHandler(&hdma_usart1_rx);
}

在该示例代码中，使用HAL库初始化了USART1、GPIO和DMA模块，并启用USART1的DMA传输中断。在main函数中，使用HAL库启用了USART1接收DMA传输，并在while循环中等待接收完成。一旦接收完成，将接收缓冲区中的数据复制到发送缓冲区，并启动USART1的DMA传输发送数据。在USART1的DMA传输完成后，将调用相应的回调函数进行处理。