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本科毕业设计(论文)(2010届)论文题目基于单片机的低频信号发生器Microcontroller-basedlow-frequencysignalgenerator学生姓名：李伟涛学号：100706112二级学院名称：电子信息学院专业：电子科学与技术指导教师：钱晓岚职称：.合作/企业教师：职称：郑重声明我谨在此郑重声明：本人所写的毕业论文《基于单片机的低频信号发生器》均系本人独立完成，没有抄袭行为，凡涉及其他作者的观点和材料，均作了注释，若有不实，后果由本人承担。承诺人（签名）：年月日浙江传媒学院本科毕业论文基于单片机的低频信号发生器基于单片机的低频信号发生器摘要:信号发生器是一种常用的信号源，广泛地应用于电子电路、自动控制系统和教学实验等领域。目前使用的信号发生器大部分是函数信号发生器，且特殊波形发生器的价格昂贵。所以本设计使用的是AT89c51单片机构成的发生器，可产生三角波、方波、正弦波等多种特殊波形和任意波形，波形的频率可用程序控制改变。在单片机上加外围器件距阵式键盘，通过键盘控制波形频率的增减以及波形的选择，并用了LCD显示频率大小。在单片机的输出端口接DAC0832进行D/A转换，再通过运放进行波形调整，最后输出波形接在示波器上显示。本设计具有线路简单、结构紧凑、价格低廉、性能优越等关键词：信号发生器；单片机；波形调整MICROCONTROLLER-BASeEDLOW-FREQuUEnNCYSIGNALGENERATORAbstract:Signalgeneratorisacommonsource,widelyusedinthefieldofelectroniccircuits,automaticcontrolsystemandteachingexperiments.Mostofthecurrentsignalgeneratorisafunctionofthesignalgenerator,andthepriceisexpensivespecialwaveformgenerator.Therefore,thisdesignusesasinglechipgeneratorAT89c51constituted,canproduceatriangularwave,Avarietyofspecialandarbitrarywaveformssquarewave,sinewave,thefrequencycanbecontrolledbychangingthewaveform.Addperipheraldevicesonasinglechipmatrixkeyboard,thekeyboardcontrolstoselectwaveformsandwaveformchangesinthefrequency,andthefrequencywiththeLCDdisplaysize.OutputportconnectedtothemicrocontrollerDAC0832D/A-converter,andthenadjustthewaveformbytheopamp,thefinaloutputwaveformontheoscilloscopedisplayconnected.Thisdesignhasasimplecircuit,compact,lowcost,superiorperformance,etc.Keywords:HCCI；waveformadjustmentsignalgenerator浙江传媒学院本科毕业论文基于单片机的低频信号发生器目录1绪论...............................................................................................................................................31.1选题背景与意义.........................................................................................错误!未定义书签。2国内外研究现状...........................................................................................................................52.1波形发生器历史发展状况..........................................................................................................52.2波形发生器当前现状分析..........................................................................................................52.2.1波形获取..........................................................................................................................52.2.2多时域测量......................................................................................................................62.2.3便携性..............................................................................................................................62.2.4实用性..............................................................................................................................62.3波形发生器趋势预测..................................................................................................................62.3.1数据处理功能.................................................................................................................62.3.2任意波形发生器.............................................................................................................73方案研究........................................................................................................................................73.1系统设计......................................................................................................................................73.2总体系统设计..............................................................................................................................93.2.1硬件原理图....................................................................................................................103.2.2软件原理图....................................................................................................................104部分功能模块..............................................................................................................................114.1LCD5110模块的概述...............................................................................................................114.2ATP89C51单片机模块概述.....................................................................................................135硬件实现及单元电路设计....................................................................................................................205.1单片机最小系统设计...............................................................................................................205.2波形产生模块设计.................................................................................................................215.3显示模块的设计.......................................................................................................................226致谢..............................................................................................................................................227参考文献......................................................................................................................................23浙江传媒学院本科毕业论文基于单片机的低频信号发生器1绪论波形发生器是电子技术领域中常见的信号源之一，在测量技术的许多领域，自动控制，通信，传输和热处理已被广泛使用。波形发生器产生了3个以上的波形发生器