鹦鹉学舌：单片机与上位机PC的通信程序设计方法：

⑴串口初始化：波特率定为4800

⑵串口接收数据：串口初始化后处于数据接收状态，当有数据到达串口时，串口将数据接收保存在寄存器中暂存

⑶串口发送数据：等数据接收完成后，将寄存器中暂存的数据通过串口发送给该数据的来源地。

⑷实验测试方法：在上位机上通过串口调试助手软件发送一个十六进制数据给单片机，单片机收到数据后立即把这个数据又发回给PC，并在串口调试助手显示。

-Parrot: SCM and PC-PC communication program design method: ⑴ serial initialization: baud rate set at 4800 ⑵ receiving serial data: serial data reception at the initialization state, when the arrival of serial data when receiving serial data stored in temporary register ⑶ serial send data: such as data receiving, upon completion, will register in the temporary data sent through the serial port to the data source. ⑷ experimental testing methods: In the host computer through serial debugging assistant software sends a hexadecimal data to the single-chip, single-chip data received immediately after the data also sent back to the PC, and in serial debugging aides show .