摘要示波器是一种用途非常广泛的电子测量仪器，它能把肉眼看不见的东西转换成看得见的图像，便于人们研究各种电现象。示波器又可以简单的分为模拟示波器和数字示波器，由于模拟示波器已经不能满足人们的需要，因此我在本文采取了单片机的方式设计了简易数字存储示波器。64180

     首先，系统的硬件部分以MSC-51单片机芯片为核心，分为外围电路A/D模块，外围电路D/A模块，硬件电路存储控制芯片以及外围电路键盘输入模块设计四个部分。它可以用外接触发电路对输入信号产生触发信号，通过A/D转换器将模拟信号转换成数字信号，然后通过单片机将数据锁存至外部RAM，再由单片机将数据送至D/A模块输出。

     其次，系统的软件部分以KeiluVision4为仿真平台，使用汇编语言编写了系统软件。包括主程序、A/D转换模块、D/A转换模块、外部存储模块以及键盘程序模块。

     最后，通过Proteus软件仿真显示，结果显示本系统设计达到了预期效果。

毕业论文关键词    单片机  A/D模块   D/A模块    数字存储示波器

毕业设计说明书（论文）外文摘要

Title      The Design of Simple Digital Storage Oscilloscope               

Abstract

The oscilloscope is an electronic measuring instrument widely used.It can convert invisible things into visible image.It makes people easier to study various electrical phenomena.Oscilloscope can simply be pided into analog oscilloscope and digital oscilloscope, analog oscilloscope can no longer meet the needs of the people, so in this article I designed simple digital storage oscilloscope by the way of microcontroller.

First, the hardware part of the system take the MSC-51 microcontroller as the core chip,it concludes of the the peripheral circuit A/D module, the peripheral circuit D/A module,the hardware circuit storage control chip and the keyboard input module.It can use an external trigger circuit generates a trigger signal to the input signal,convert the anolog signal into digital signal by the A/D converter,and then lacth the dates into the external RAM.At last,send the datas to the D/A module output by the microcontroller.

Secondly,the software part of the system take KeiluVision4 as the simulation platform, writes system program with the AssemblyLanguage, including the main program, A/D converter program module, D/A converter program module, an external storage program module,and a keyboard program module. 

Finally,the Proteus simulation results show that the design of system is achived to the desired effect.

Keywords    Microcontroller  A/D module   D/A module   DSO              

1  引言 1

1.1  研究背景与意义 1

1.2  数字存储示波器的发展现状与前景 1

1.3  设计的任务及要求 2

2  数字存储示波器的总体设计 3

2.1  数字存储示波器的设计方案 3

2.2  数字存储示波器的总体设计框图 3

3  数字存储示波器的硬件设计 3

3.1  输入调理电路设计 3

3.2  硬件电路存储控制模块的设计 4

3.3  外围电路A/D模块设计