并行接口器件功能演示的可视化设计

包括论文,设计,论文字数:6885,页数:20

摘    要
随着科学技术的发展，计算机的应用也越来越广泛，因此在计算机中大大提高数据传输速度的并行接口器件也倍受人们的关注。并行接口使得计算机设备的安装及使用容易，并且没有数目限制。我们通过深入仔细地研究它的原理功能来更好地使其在应用中发挥功效。
在本课题中，主要以可编程并行接口芯片8255A为例，研究其内部结构，掌握端口选择以及它与CPU的传送方式。在仿真平台上通过编程来进行可视化的设计来对其功能原理有个直观的了解。
在计算机中各器件的数据、命令在线路中以高低电平组合来表示，功能都是不可见的。我们通过平台上的软件编程来利用计算机图形图像技术使并行接口的逻辑功能以图形图象的形式显示出来。并且可以进行调试，剖析。

关键词：可编程；并行接口； 仿真实验平台； 仿真

A Visual Design for Peripheral Interface Chip
Abstract

As the technology developing, the use of computer is becoming more and more widely. Due to this fact, the parallel interface which mainly used for greatly increasing speed of data transfer, has driven a lot attention. It makes the computer kits setup and use much easier, also with no number restriction. We get it worked much better in common use by studying and researching the principle of it.
In this design, take parallel 8255A chip for example, study its inner structure, understand the interface selectiveness and transmission way with CPU. Parallel interface achieve the data transmission between bit and I/O devices using more than one data wire, which is suit for short distance transmission. Come to a direct display of its functionalities with VC virtual platform by visual design.
Data and code in every computer parts, describes itself by combination, the function is invisible. By make a programmed of software on the platform, in order to show the parallel interface logic by using computer graphic technology. Also make it available for adjusting and research.

Key words:  programmable; parallel interface (peripheral interface); virtual platform; simulation

目      录

1 引言 1
1.1 课题背景 1
1.2实验平台介绍 1
1.3 项目要求 2
1.3.1 功能要求 2
1.3.2 实验环境 2
2 8255芯片主要功能及特点 2
2.1 并行接口的主要特点 2
2.2 8255芯片的内部结构 3
2.3 8255芯片的引脚 3
2.4 8255芯片的控制字及三种工作方式 5
2.4.1 工作方式控制字 5
2.4.2 8255芯片的工作方式0： 5
2.4.3 8255芯片的工作方式1： 6
2.4.4 8255芯片的工作方式2： 8
2.5 8255芯片与外设的连接 8
3 本课题研究方法 9
3.1 设计思路 9
3.2程序效果图 9
3.3部分代码简要说明 11
结    论 14
参考文献 14
致    谢 15
声    明 16

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