陕西理工学院毕业设计基于单片机的波形发生器设计许启动（陕理工物理与电信工程学院电子信息科学与技术专业1203班，陕西汉中723001）指导教师：宋卫星[摘要]本设计采用一块STC89C51单片机和一块DAC0832产生所需要的不同波形，也就是说用单片机（STC89C51）当作控制核心，在单片机外部用D/A电路（DAC0832）、运算放大电路（LM358）、按键与LCD液晶显示电路等，通过控制按钮可控制产生多种波形（包括方波、三角波、正弦波），然后用LCD液晶显示器将所产生的波形进行显示。本设计所采用的系统设计比较简单、性能较为优良、性价比相对较高，可用于很多种需要低频信号的场所，具有很高的实用性。[关键词]信号源；单片机；DAC0832DesignofwaveformGeneratorBasedonsinglechipmicrocomputerXuQidong（Grade12,Class3,MajorElectronicInformationScienceandTechnology,PhysicsDept.,ShaanxiUniversityofTechnology,Hanzhong723000,Shaanxi）Tutor:SongWeixingAbstract:ThisarticlebydesignofsystemisusingSTC89C51singletabletsmachineandarraydieconversiondevicesDAC0832producedbyrequireddifferentsignaloflowfrequencysignalsource,isusedSTC89C51singletabletsmachineascontrolcore,andinperimeteruseddigital/simulationconversioncircuit(DAC0832),andoperationalamplifiercircuit(LM358),andpressandLCDdisplaylampcircuit,bypresscancontrolproducedsquare,andsawtoothwave,andtrianglewave,andsinewave,whilewithLCDdisplaylampindicatescorrespondsofwaveformoutput.Thissimplesystemdesignedbydesign,excellentperformance,cost-effective,placeswithlowfrequencysignalsourcecanbeusedforavarietyofneeds,withacertaindegreeofpracticality.Keywords:Signalsource,SingleChipMicyoco(SCM),Digitaltonalogconverter陕西理工学院毕业设计目录1引言.....................................................11.1选题目的及研究意义.........................................11.2波形发生器的发展现状....................................11.3波形发生器的发展趋势....................................11.4本设计初步思路..........................................12系统总体方案设计..........................................22.1概述....................................................22.2系统硬件设计方案........................................22.3系统软件设计方案........................................33波形发生器硬件设计........................................43.1D/A转换器...............................................43.1.1D/A转换器的主要技术指标...........................43.1.2DAC0832转换器.....................................43.2单片机的选择............................................53.2.1单片机及其外围电路的设计..........................53.2.2复位电路...........................................73.2.3时钟电路...........................................83.2.4键盘输入电路设计..................................83.3显示电路的设计..........................................83.4放大电路的设计...........................................94波形发生器软件设计.......................................104.1主程序流程图............................................104.1.1方波产生设计......................................114.1.2三角波产生设计....................................114.1.3正弦波产生设计....................................124.2幅值及频率的控制.......................................125电路仿真及系统调试......................................135.1设计仿真演示............................................135.2系统调试................................................145.2.1硬件调试..........................................15陕西理工学院毕业设计5.2.2软件...
