stm32串口 环形缓冲区 代码

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{

	
//    printf("IT IN\r\n");
//	printf("%d \r\n",HAL_GetTick());
	//置零设定电流值 PID时间
    if (huart->Instance == USART3)  
        {
			 // 将数据放入缓冲区
			circular_buffer.buffer[circular_buffer.head] = rxBuffer[0];
			circular_buffer.head = (circular_buffer.head + 1) % BUFFER_SIZE;

			// 如果缓冲区满,则丢弃最早的数据
			if (circular_buffer.head == circular_buffer.tail) {
				circular_buffer.tail = (circular_buffer.tail + 1) % BUFFER_SIZE;
			}
        }
		
}

每接受一个字节的数据都触发一次中断

void USART3_IRQHandler(void)
{
  /* USER CODE BEGIN USART3_IRQn 0 */

  /* USER CODE END USART3_IRQn 0 */
  HAL_UART_IRQHandler(&huart3);
  /* USER CODE BEGIN USART3_IRQn 1 */
	HAL_UART_Receive_IT(&huart3, (uint8_t *)&rxBuffer,1);  //添加的一行代码
  /* USER CODE END USART3_IRQn 1 */
}