毕业设计（论文）-基于单片机的波形发生器设计.docVIP

基于单片机的波形发生器设计 摘 要 该设计是基于AT89C51单片机的数字式低频信号发生器。采用AT89C51单片机作为控制核心，外围采用数字/模拟转换电路（DAC0832）、运放电路（LM324）、按键等。通过按键控制可产生方波、三角波、正弦波等。其设计简单、性能优好，可用于多种需要低频信号的场所，具有一定的实用性。 设计是利用AT89C51单片机和数模转换器件DAC0832产生所需不同信号的低频信号源，其信号幅度和频率都是可以按要求控制的。文中简要介绍了DAC0832数模转换器的结构原理和使用方法，AT89C51的基础理论，以及与设计电路有关的各种芯片。文中着重介绍了如何利用单片机控制D/A转换器产生上述信号的硬件电路和软件编程。信号频率幅度也按要求可调。 本设计制作的波形发生器，可以输出多种标准波形，如方波、正弦波、三角波、等，还可以输出任意波形，如用鼠标创建的一个周期的非规则波形或用函数描述的波形等，输出的波形的频率、幅度均可调，且能脱机输出。设计的人机界面不但清晰美观，而且操作方便。本设计具有线路简单、结构紧凑、价格低廉、性能优越等优点。 关键词：波形发生器，单片机，AT89C51，DAC0832 The Waveform Generator Design ABSTRACT Waveform The system is a digital signal generator based on single chip computer.At89c51 is used as a control microcontroller core.The system is composed by digital/analog comversion(DAC0832), imply circuit,button.It can generate the square, triangle and sine wave.The system can be used for a signal soure in the low-frequency signal soure.It is very practical. This paper introduces the low frequency sources of different signals that are produced by AT89C51 SCM and DAC0832. Its signal range and frequency can be controlled by requirement. This paper briefly introduces the structure principle and usage of DAC0832, the basic theory of AT89C51 and various chips which relevant to design circuit. this paper emphasized how to use SCM to control the hardware circuit and software program of the signals above which produced by DAC0832. 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.Various signals are an important part ofcorrespondent area. In this area, sine wave, triangle wave and square wave are common signals. The trait of this signal source is: small volume, low price,full functional and easily used signals source is essential. KEY WORDS: Waveform generator, Single-Chip, AT89C51, DAC0832 目　录 前　言 1 第1章 波形发生器概述和方案论证 2 1.1