将实验箱232通信的接收端与发送端短接，P1.0接一个发光二极管，编写串口自发自收（查询方式）通信程序，检查本单片机的串口是否完好，如果发送字符与接收字符一致，则P1.0亮一秒灭一秒闪亮；否则，P1.0熄灭。设fosc=11.0592MHz，波特率为9600。要求用定时器T0实现1S的延时。 -Shorted to the experimental box 232 receiving end of the communication with the sender, P1.0 by a li