毕业设计 基于单片机的波形发生器设计.doc

基于单片机的波形发生器设计 院 系 自动学 专 业 测术 班 级 5407102 学 号 200504071067 姓 名 岳振杰 指导师 负责师 沈阳航空工业学院 2009年6月摘 要 各种各样号是领组较为见号学学实验要这号的发装为了实验灵齐号 本文介绍AT89C51单数模转换DAC0832产号频号号频简要绍DAC0832数模转换结AT89C51的基础理论设计电关的各对毕业设计着绍单D/A转换产号电软编号频可调 本次产频号号设计不仅理论实践满实验强该号点积稳实现齐 关键词：信号单DAC0832 Abstract Various signals are an important part of correspondent area. In this area, sine wave, triangle wave and square wave are common signals. In science research and teaching experiment, we often need the occurrence equipment of these signals. In order to make the experiment and research easier, it is essential to develop a suitable, full functional and easily used signals source is essential. This paper introduces the low frequency sources of different signals which are produced by AT89C51 SCM and DAC0832. Its signal range and frequency can be controlled by requirement. This paper introduces the structure principle and usage of DAC0832 briefly, the basic theory of AT89C51 and various chips which relevant to design circuit. According to the request to the graduation project, this paper emphasized how to use SCM to control the hardware circuit and software program of the signals. The signal frequency range also can be adjusted by requirement. This signal source design plan concerns on producing different low frequency signals, not only meet the request of experiment in theory and in practice, but also have strong feasibility. The trait of this signal source is small volume, low price, stable function, easily achievable, and full function. Keywords: Signal source; Single Chip Micyoco（SCM）; Digital to nalog converter 目 录 第1章 绪 论 …1 1.1 课题背景 1 1.2 波形发生器的发展现状 1 1.3 波形发生器的发展趋势 2 1.4 本文研究的主要内容 2 1.5 论文内容及安排 3 第2章 系统总体方案设计 4 2.1 概述 4 2.2 系统硬件设计方案 5 2.3 系统软件设计方案 6 第3章 波形发生器硬件设计 8 3.1 波形产生电路的设计 8 3.1.1 D/A转换器 8 3.1.2 D/A转换器的主要技术指标 8 3.1.3 DAC0832转换器 9 3.2 单片机的选择 10 3.2.1 单片机及其外围电路的设计 10 3.2.2 复位电路 13 3.2.3 时钟电路 14 3.3 键盘输入电路设计 15 3.4 显示电路的设计 16 3.5 显示驱动的设计 17 3.6 运算放大器的设计 18 第4章 波形发生器软件设计 20 4.1 波形产