In this paper, the principle and the method, which the printer parallel port in IBM-PC is used as a communication interface to connect three singelchips whit PC, are introduced. The interface plan is given;

• 本文介绍了利用IBM-PC机打印端口与控制用三个单片机实现通讯的原理和方法,给出了接口图以及主机和下位机通讯流程图。