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1、Thedesignofmicrocontroller-basedsignalgeneratorHuangPengyong(MeizhouBayVocationalTechnicalCollege,Putian,Fujian,351254)AbstractWaveformgenerator,asimplefunctionsignalgenerator,aproduceavarietyofwaveforms,suchasthetrianglewave,sawtoothwave,squarewave,sinewaveform
2、circuit.Functionsignalgeneratorcircuitexperimentsandequipment,instrumentswithawiderangeofuses.Bytheprincipleofthefunctiongenerator,aswellasstructureanalysis,canbedesignedonecantransformthetrianglewave,sawtoothwave,squarewave,sinefunctionwaveformgenerator.Functio
3、nsignalgeneratorsignalsinindustrialproductionandscientificresearchtomeasuretheperformanceandparametersofthecomponents,electricalandelectronicproductsindexvalidation,parameteradjustment,andperformanceappraisal.Mostofthecommonlyusedsignalgeneratorbyananalogcircuit
4、,thisanalogsignalgeneratorforlow-frequencysignaloutputoftenrequirestheRCvalue,sothatnotonlytheparametersofaccuracyisdifficulttoguarantee,butthesizeandpowerconsumptionarelargebythedigitalcircuitcomposedoflow-frequencysignalgenerator,althoughitsperformanceisgood,b
5、utlarger,moreexpensive,high-precision,wideamplitudemodulationwillbecomethetrendofthedigitalsignalgenerator.Thisarticledescribesthe89C52microcontrolleranddigitaltoanalogconverterDAC0832toproducethedesiredsignalofthelowfrequencysignalsource,thesignalamplitudeandfr
6、equencycanbecontrolledasrequired.ThearticlebrieflydescribesthestructureofprinciplesanduseoftheDAC0832digital-to-analogconverter,the89C52basictheoryanddesignofcircuitsavarietyofchips.ThepaperfocusesonhowtousemicrocontrollertocontroltheD/Aconvertertoproducethehard
7、wareandsoftwareprogrammingoftheabovesignals.Thesignalfrequencyrangeisalsoadjustableasrequired.Thecoreofthedesigntasksare:AT89C52astheD/AconverterandDAC0832devices,circuitsimulationsoftware,designhardwaredriverswritteninC,inordertoachieveprocesscontroltoproducesi
8、newave,trianglewave,squarewave,threecommonlyusedlow-frequencysignals.Waveformsandenteranyfrequencyvaluecanbeselectedviathekeyboard.Keywords:onAT89C52functionwaveformg
