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1、Thedesignofmicrocontroller-basedsignalgeneratorHuangPengyong(MeizhouBayVocationalTechnicalCollege,Putian,Fujian,351254)AbstractWaveformgenerator,asimplefunctionsignalgenerator,aproduceavarietyofwaveforms,suchasthetrianglewave,sawtoothwave,squarewave,sinewaveformcircuit.Functi
2、onsignalgeneratorcircuitexperimentsandequipment,instrumentswithawiderangeofuses.Bytheprincipleofthefunctiongenerator,aswellasstructureanalysis,canbedesignedonecantransformthetrianglewave,sawtoothwave,squarewave,sinefunctionwaveformgenerator.Functionsignalgeneratorsignalsinind
3、ustrialproductionandscientificresearchtomeasuretheperformanceandparametersofthecomponents,electricalandelectronicproductsindexvalidation,parameteradjustment,andperformanceappraisal.Mostofthecommonlyusedsignalgeneratorbyananalogcircuit,thisanalogsignalgeneratorforlow-frequency
4、signaloutputoftenrequirestheRCvalue,sothatnotonlytheparametersofaccuracyisdifficulttoguarantee,butthesizeandpowerconsumptionarelargebythedigitalcircuitcomposedoflow-frequencysignalgenerator,althoughitsperformanceisgood,butlarger,moreexpensive,high-precision,wideamplitudemodul
5、ationwillbecomethetrendofthedigitalsignalgenerator.Thisarticledescribesthe89C52microcontrolleranddigitaltoanalogconverterDAC0832toproducethedesiredsignalofthelowfrequencysignalsource,thesignalamplitudeandfrequencycanbecontrolledasrequired.Thearticlebrieflydescribesthestructur
6、eofprinciplesanduseoftheDAC0832digital-to-analogconverter,the89C52basictheoryanddesignofcircuitsavarietyofchips.ThepaperfocusesonhowtousemicrocontrollertocontroltheD/Aconvertertoproducethehardwareandsoftwareprogrammingoftheabovesignals.Thesignalfrequencyrangeisalsoadjustablea
7、srequired.Thecoreofthedesigntasksare:AT89C52astheD/AconverterandDAC0832devices,circuitsimulationsoftware,designhardwaredriverswritteninC,inordertoachieveprocesscontroltoproducesinewave,trianglewave,squarewave,threecommonlyusedlow-frequencysignals.Waveformsandenteranyfrequency
8、valuecanbeselectedviathekeyboard.Keywords:onAT89C52functionwaveformg
