PC机基于EPP接口的实验硬件扩展总线  

Experimental hardware expanded bus based on EPP of PC

作　　者：陈星[1] 温锋[1] 

机构地区：[1]大连理工大学

出　　处：《微计算机信息》2011年第9期77-79,共3页Control & Automation

基　　金：大连理工大学2009教学改革基金课题"基于EPP接口的程序控制实验系统"

摘　　要：辅助学生在微机原理与接口控制学习中建立从原理到应用的认识是微机接口实验应达到的首要目的。现有的实验系统,大多通过上位PC机与实验箱上的代理或目标处理器通信实现对实验电路的控制,其控制方式是间接的,不直观,且增加额外成本和环节,在实际工程应用中也很少使用。EPP直接接口的微机原理实验系统去除以往实验系统上的处理器,采用简单数字电路实现基于PC机EPP并口的标准总线扩展并连接实验电路,使控制访问更为直接,也更易与实际微机控制应用相结合。通过扩展总线接口还能连接学生自己设计的实验电路,有利于开放性实验的设计与实现。基于这一思想设计构造的实验系统经实际教学验证,效果良好。The primary purpose of the microcomputer interface experiments is to assist students to establish the connection from the principle to the application.In the most existing experimental systems,the host microcomputer makes control to the experiment circuit by communicating to the agent/target processor,which is indirect,possesses more cost and is rarely used in the practical engineering applications.In the microcomputer experiment system based on direct interfacing of EPP,there is no more processors beside the host microcomputer which directly controls the experiment circuit via the expanded bus interface based on the EPP.This makes the control access more direct and easier to be combined with the actual application.The expanded bus interface implemented with simple digital circuit can also be used to connect to the experimental circuit designed by the students and is conducive to the open experiment design and implementation.The teaching effect of the experiment system according to this thought is good.

关 键 词：EPP 微机 扩展总线接口 实验系统 

分 类 号：TP368[自动化与计算机技术—计算机系统结构] TN919[自动化与计算机技术—计算机科学与技术]