利用单片机及pc机串口实现接收发字符，通过串口调试助手能看到键盘上发出的字符。利用keilc编写的单片机与pc机的通信程序。-And the use of single-chip receiver implementation pc machine serial hair characters, through the serial debug aide sent to see the characters on the keyboard. Keilc prepared using single-chip machine and pc communication program.