基于单片机的信号发生器设计与仿真-雷发禹

422004、、、．Proteus．．ProteusTH702ATheDesignandSimulationofSignalGeneratorBasedonMCULEIFa-yu,BINMiao-linLIYong-jian,LIUZe-hua,YAOZhi-qiangInformationEngineeringDepartmentShaoyangUniversity,Shaoyang,Hunan,422004Abstract:Asforthedefectsofwaveformdistortioncausedbythetraditionalwaveformgeneratorfortheexistenceofscatteredcomponents,thispaperhasputforwardasignalgeneratorprogramofsquarewave,saw-toothwave,trianglewaveandsinewaveachievedbyproceduresandbasedonMCU.Inaddition,onthePROTEUSelectronicdesignplatform,asimulationprogramiscarriedout,.Havingachievedthefreeswitchingofwaveform,theon-lineadjustmentoffrequencyandmagnitude,whichgivesafundamentalsolutiontothewavedistortion.Keywords:MCU;Signalgenerator;Proteus1672-7010200903-0039-050、．．,．ICL8038．、FPGA、DDS．．“+D/A”“FP-GA+D/ADDS”．．AT89C51．．11．P3P0D/A、．P22009-05-1263200909JournalofShaoyangUniversity(NaturalScienceEdition)Vol.6No.3Sep.2009P0.DACD/A．1.1P0D/ADAC0808．V=K*D[Vref+-Vref-]KDVref-、Vref+．D．D00H→FFH0→15V．“MOVCA@A+DPTR”P0．1.2D/AP0．P0P2P2．MOVP0DATADATAP0．MOVP2#0FFH1．MOVAP2P2．MOVR3AP2R3R3．LCALLDELAYDELAYR3P2．fT=1/fT/2．TDP2NR31/2f*TD)．1.3V=K*D[Vref+-Vref-]K、DVVref+Vref-Vref+Vref-Vref-0．Vref+D/AV．1.4D/A1264032．．122f0．f＝03f＝f0fp=f0．-20dB/10．2PROTEUS3．AT89C51P0D/AP28D/AVref+P3P1LED．?js?33.145．KK．3.2．ORG0000HMAIN:MOVR0#00HLPPMOVP0,#00HJNBK1,S1;S1P1.0．SETBLED1JNBK2,S2;S2P1.1．SETBLED2JNBK3,S3;S3P1.2．SETBLED3JNBK4,S4;S4P1.3．SETBLED4SJMPLPP341．K4:MOVA,R0MOVCA,@A+DPTRMOVP0,AMOVP2,#0FFHMOVAP2MOVR3ALCALLDS01DS01．INCR0CJNER0#92LPP;92．MOVR0#00H4PROTEUS3HEX．1P31．2P22．12P26423RV16RV120%50%．47．5AT89C51、、、．．:1.、EDAJ.2005,12(2):111-112.2.AT89S51PWMJ.2005,12(2):102-104.3.FPGAA.,2008:77-90.4.DDSD..2004:3-5.5,.M.2006.6./J.2006,(1):79-80.7.J.,2008,(2):14-18.8.PROTUSEM.2007.[9].[M].2005.(a)RV1=20%R(b)RV1=50%R6343