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

AT89S51单片机实验及实践教程，里面有详细的实验版的电路图等，还有keilC的介绍等-AT89S51 Single-chip experiments and practical tutorial