并行接口器件功能演示的可視化設計

論文字數:6885,頁數:20

摘    要
隨著科學技術的發展，計算機的應用也越來越廣泛，因此在計算機中大大提高數據傳輸速度的并行接口器件也倍受人們的關注。并行接口使得計算機設備的安裝及使用容易，并且沒有數目限制。我們通過深入仔細地研究它的原理功能來更好地使其在應用中發揮功效。
在本課題中，主要以可編程并行接口芯片8255A為例，研究其內部結構，掌握端口選擇以及它與CPU的傳送方式。在仿真平臺上通過編程來進行可視化的設計來對其功能原理有個直觀的了解。
在計算機中各器件的數據、命令在線路中以高低電平組合來表示，功能都是不可見的。我們通過平臺上的軟件編程來利用計算機圖形圖像技術使并行接口的邏輯功能以圖形圖象的形式顯示出來。并且可以進行調試，剖析。

關鍵詞：可編程；并行接口； 仿真實驗平臺； 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      錄

1 引言 1
1.1 課題背景 1
1.2實驗平臺介紹 1
1.3 項目要求 2
1.3.1 功能要求 2
1.3.2 實驗環境 2
2 8255芯片主要功能及特點 2
2.1 并行接口的主要特點 2
2.2 8255芯片的內部結構 3
2.3 8255芯片的引腳 3
2.4 8255芯片的控制字及三種工作方式 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芯片與外設的連接 8
3 本課題研究方法 9
3.1 設計思路 9
3.2程序效果圖 9
3.3部分代碼簡要說明 11
結    論 14
參考文獻 14
致    謝 15
聲    明 16