1.总结串口的发送和接收功能使用到的函数

发送：

HAL_StatusTypeDef HAL_UART_Transmit(

                                                                                UART_HandleTypeDef *huart,

                                                                                const uint8_t *pData,

                                                                                uint16_t Size, uint32_t Timeout

                                                                                        )

接受：

HAL_StatusTypeDef HAL_UART_Receive_IT(

                                                                                UART_HandleTypeDef *huart,

                                                                                uint8_t *pData,

                                                                                 uint16_t Size

                                                                                  ）
2.总结DMA的作用，和DMA+空闲中断的使用方式

作用：无需通过CPU可以直接存取和写入函数

方法：使用HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle_DMA(

                                                                                              UART_HandleTypeDef *huart,

                                                                                              uint8_t *pData,

                                                                                               uint16_t Size

                                                                                               )

函数进行接受  在接受后处理完数据要将容器数组清空
3.使用PWM+ADC光敏电阻完成光控灯的实验