STM32中断与DMA通信编程

一、CubeMX设置

R1设置为高电平熄灭状态

PB5的GPIO mode

RCC配置：配置时钟源为外部时钟源

配置时钟

配置引脚

设置中断

二、代码编写

在main中添加代码：
添加定义：

uint8_t aRxBuffer;			
uint8_t Uart1_RxBuff[256];		
uint8_t Uart1_Rx_Cnt = 0;		
uint8_t	cAlmStr[] = "数据溢出(大于256)\r\n";

在/* USER CODE BEGIN 2 */中添加如下代码：

	HAL_UART_Receive_IT(&huart1, (uint8_t *)&aRxBuffer, 1);

在/* USER CODE BEGIN 4 */中添加如下代码：

/* USER CODE BEGIN 4 */
/**
  * @brief  Rx Transfer completed callbacks.
  * @param  huart pointer to a UART_HandleTypeDef structure that contains
  *                the configuration information for the specified UART module.
  * @retval None
  */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(huart);
  /* NOTE: This function Should not be modified, when the callback is needed,
           the HAL_UART_TxCpltCallback could be implemented in the user file
   */
 
	if(Uart1_Rx_Cnt >= 255)  //溢出判断
	{
		Uart1_Rx_Cnt = 0;
		for(int i=0;i<255;i++)
		{
			Uart1_RxBuff[i]=0;
		}
		HAL_UART_Transmit(&huart1, (uint8_t *)&cAlmStr, sizeof(cAlmStr),0xFFFF);	
	}
	else
	{
		Uart1_RxBuff[Uart1_Rx_Cnt++] = aRxBuffer;   //接收数据转存
	
		if((Uart1_RxBuff[Uart1_Rx_Cnt-1] == 0x0A)&&(Uart1_RxBuff[Uart1_Rx_Cnt-2] == 0x0D)) //判断结束位
		{
			HAL_UART_Transmit(&huart1, (uint8_t *)&Uart1_RxBuff, Uart1_Rx_Cnt,0xFFFF); //将收到的信息发送出去
			Uart1_Rx_Cnt = 0;
			for(int i=0;i<255;i++)
		    {
			    Uart1_RxBuff[i]=0;
		    } //清空数组
		}
	}
	
	HAL_UART_Receive_IT(&huart1, (uint8_t *)&aRxBuffer, 1);   //再开启接收中断
}
/* USER CODE END 4 */c

三、结果展示

四、参考博客

https://blog.csdn.net/qq_37286676/article/details/86556634
https://blog.csdn.net/sjxpf922/article/details/103979668