中断接口器件的功能演示的可视化设计

包括文档,设计,文档字数:14937,页数:34

摘  要
中断是计算机系统中十分重要的一种机制。它是解决外部设备和系统连接的很好途径，有效地实现了外部设备与CPU的并行工作。在实际应用中，除了要考虑如何对中断控制器编程进行的问题，还要对采用中断方式进行I/O控制的接口电路进行设计。中断是一种信号，它告诉微处理器已发生了某种需要特别注意的事件，需要去处理或为其服务。在本课题中我们深刻的了解到了8259A的工作方式，工作原理和工作状况；同时知道了中断存在的重要意义，中断通俗的理解可以认为是“异常”，在有异常发生的情况下产生的情况，在两件摆在眼前的事物中选择更需要立刻执行响应的程序，即是在中断中所说的优先级。我们运用编程技术，将8259A芯片仿真式的展现出来，用C++结合程序结构，编程演示其内部的工作机理。利用程序的设计，将芯片的工作原理通过实验平台给大家一个直观的演示，以便对中断的概念理解得更透彻。

关键词：8259A；优先级；状态机；可视化；仿真

 
The Design of Interrupt Controller Functional Demo of Visual Design
Abstract
The interruption is a important function in each computer system. Interruption is the solution of external equipment and systems is a good way to connect, it availably carried out exterior equipments and proceed together of CPU a work.In physically appliedly, in addition to want to consider how to break off a controller plait the distance carry on of problem, also want to break off a way to carry on I/O to control to the adoption of connect a people's electric circuit to carry on a design.The interruption is a kind of signal, it tells that the microprocessor has already taken place a certain demand specially notices of affairs, need a whereabouts reason or contribute efforts to it.We deeply understood the work method with 8259A in this topic, work principle and work condition;Knew to break off existent important meaning in the meantime, break off the popular comprehension can think to be a "abnormality", under the sistuation that have excrescent occurrence output circumstance, at two procedures which put in the at present thing to win election to choose to even need to immediately carry out to respond to, is in the interruption say of have the initiative class.Our usage weaves a distance technique, 8259A the chip imitate the display of true type to come out and use C++combine procedure structure, weave a distance to play to show it inner part of work mechanism.Make use of the design of procedure, pass the work principle of chip experiment terrace to everyone's a consciousness which keeps a view, make everyone to understand  the mean of interruption more very clear..

Key words: 8259A;priority; state machine;visual; emulation
 

目      录

1 引言 1
1.1 实验台的现状说明和设计目标 1
1.2 8259A的外部引脚图 2
1.3 8259A的内部结构 4
1.4 中断优先级分析器的工作原理 5
1.5 8259A的工作原理 6
1.6 该课题的主要研究方向和研究方法 7
2 对该课题的部分概念的重点说明 7
2.1 可视化的理解说明 7
2.2 访真式编程的理解说明 9
2.3 状态机的理解说明 9
2.4 CPU与8259A之间的转换方式 10
3 代码的编写工作以及说明 11
3.1 对代码的初步设计工作 11
3.2 对基类和派生类的主要函数的解释说明 12
3.2.1 对基类中部分函数的解说 12
3.2.2 对派生类中部分函数的解说 13
3.3 对各器件的初始化编程 14
3.4 对部分代码的说明 19
3.4.1 固定值的定义方式 20
3.4.2 与CPU之间的连接线定义方式 21
3.4.3 判断优先级的引脚设定 22
3.4.5 读写信号的设定 24
3.5 实现中断要求的程序解说 24
4 测试结果与工作总结 25
结       论 26
参 考 文 献 27
致    谢 28
声    明 29

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