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编号:毕业设计(论文)说明书题目:基于单片机的波形发生器的设计系别:信息工程系专业:通信工程学生姓名:学号:指导教师:职称:讲师题目类型:理论研究实验研究工程设计工程技术研究软件开发应用研究2013年5月24日摘要本论文主要介绍基于单片机的波形发生器,该系统是基于AT89S52单片机的低频信号发生器。主要采用AT89S52单片机作为控制核心,外围电路包括数字/模拟转换电路(DAC0832)、运放电路(TL082CP)、按键和液晶等。同时用液晶显示其对应的波的名称及频率。可产生方波、三角波、正弦波、等多种波形,波形的频率以可以通过编程,利用按键控制,可以根据需要,选择不同类型的波形输出,并且可以通过电位器调节输出波形峰峰值。单片机控制信号输出,通过D/A转换器DAC0832将数字信号转换成模拟信号,滤波放大,最终由示波器显示出来,能产1Hz—3kHz的波形。通过按键来控制三种波形的类型选择、频率变化,并通过1602液晶屏显示其各自的类型以及数值,系统大致包括信号发生部分、数/模转换部分以及液晶显示部分三部分。本系统具有线路简单、结构紧凑、性能优越等特点。文章给出了源代码,通过仿真测试,其性能指标达到了设计要求,可用于多种需要低频信号的场所,具有一定的实用性。关键词:单片机;波形;信号发生器;DAC0832AbstractThispaperdescribesthewaveformgeneratorconsistingof,thesystemwasusingAT89S52microcontrollerdigitallow-frequencysignalgenerator.ControlusingAT89S52microcontrollerasthecore,peripheralcircuitsincludingdigital\analogueconversioncircuit(DAC0832),anddischarge(TL082CP),thekeypadandLCD.BothLCDdisplaysthenameofthecorrespondingwaveandfrequency.Toproducesquarewave,trianglewave,sinewave,suchasavarietyofwaveforms.Waveformfrequencycanalsobecontrolledthroughprogrammingandkeys,andyoucanadjustthewaveformpeakspeaks.Canselectdifferenttypesofwaveformoutput.SinglechipmicrocomputercontrolsignaloutputthroughDAC0832D\Aconvertertoconvertthedigitalsignalintoananalogsignal,filteramplifier,andultimatelybytheoscilloscopedisplay,1Hz-3kHzwaveform.Tocontrolthreewavetypesbypressingselect,change,andby1602LCDdisplaytheirtypesandvalues.Systemsgenerallyinclude\modeconversionandthesignalgeneratorparts,andliquidcrystaldisplaypartsinthreeparts.Thesystemhassimplelines,compact,excellentperformancecharacteristics.Articlegivesasource,throughsimulationtests,theirperformancemeetsthedesignrequirements,placesoflow-frequencysignalscanbeusedforavarietyofneeds,hasacertainrelevance.Keywords:SCM;waveform;signalgenerator;DAC0832目录引言...........................................................11设计课题概况................................................21.1课题背景及重要意义.....................................................................................................21.1.1课题的背景..............................................................................................................21.1.2课题的意义..............................................................................................................21.2课题设计的目的.............................................................................................................31.3本论文所做的工作.........................................................................................................32设计的主要内容及性能要求....................................42.1设计主要内容..................................................................................................................42.2基本内容和性能要求.....................................................................................................42.3创新部分.........................................................................................................................43方案论证与比较..............................................43.1参考方案及分析.............................................................................................................43.2方案选择及理由.............................................................................................................54整体设计思路及原理..........................................54.1方案介绍.........................................................................................................................54.1.1毕业设计题目要求....................................................................................................54.1.2方案介绍....................................................................................................................54.2设计原理.........................................................................................................................64.2.1系统设计原理............................................................................................................64.2.2系统设计框图............................................................................................................64.2.3硬件原理....................................................................................................................64.2.4软件原理....................................................................................................................65硬件设计部分................................................75.1主要器件介绍..................................................................................................................75.1.1AT89S52单片机........................................................................................................75.1.2数模转换芯片DAC0832..........................................................................................85.1.3液晶显示屏LCD1602...............................................................................................85.1.4双运算放大器TL082CP...........................................................................................95.2单元电路设计...............................................................................................................105.2.1供电电路的设
本文标题:基于单片机的波形发生器的设计
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