摘要
本文介绍了一种基于PC机打印口的上下位机并行通讯方法,硬件接口是由打印机适配器和扩展电路构成,在正确的软件通讯协议支持下能够实现安全快速的双向并行通讯。
This article deals with a method of parallel communication between the master computer and the slave computer based on LPT, Its hardware interface con sists of printer adapter and expanding circuit, it can fulfill quit and safe bi- direction parallel communication under the support of correct software communica tion protocol.
出处
《微计算机信息》
2004年第5期110-111,共2页
Control & Automation
关键词
并行通讯
打印口适配器
8255
上下位机
parallel communication
printer adapter
8255
master and slave comput e
