基于单片机的红外遥控器解码器的设计

基于单片机的红外遥控器解码器的设计李泽光(116622):9012型红外遥控器被广泛用在家用电器和仪器仪表中,在了解了其发射的编码脉冲信号波形后,设计了基于单片机AT89C51的红外遥控器解码器,对解码器硬件和相应软件进行分析并给出程序流程图将红外遥控器用在生产即时显示系统中,作为参数设置和系统控制用红外遥控器,既操作灵活方便,又能提高系统抗干扰能力,在实际中收到了良好效果:红外遥控器;单片机;解码器;信号:TP36811:B:1004-373X(2007)09-036-02DesignofDecoderofInfraredRemoteControllerBasedonSingleChipMicrocomputerLIZeguang(InformationEngineeringCollege,DalianUniversity,Dalian,116622,China)Abstract:The9012modelinfraredremotecontrolleriswidelyusedinfamilyelectricapplianacsandinstrument.Afterthecodepulsesignalwaveshapethatinfraredremotecontrolleremitsisknown,thedecoderofinfraredremotecontrollerbasedonsinglechipmicrocomputerAT89C51isdesigned,thedecoderhardwareandappropriatesoftwareareanalysedandtheprogramprocessdiagramsaregiven.Puttingtheinfraredremotecontrollertoproduction-intimedisplaysystem,itisputtoparametersettingandsystemcontrol,itiseasytohandleandcanimprovecapabilityofanti-disturbance,thegoodeffectisacquiredinpractice.Keywords:infraredremotecontroller;singlechipmicrocomputer;decoder;signal:2007-01-26TC9012FCMOS,(TV),(VTR),,TC9012F9012AT89C519012,,1TC9012FTC9012F4,fosc455kHz,455kHz,fosc12,fc=3719kHz,1/3TC9012F,37.9kHz,1,,28,32,8TCP(415ms)8TCP(415ms)(PPM),/00/10/00/10,2TCP(11125ms)4TCP(2125ms),,TCP(015626ms),,图1遥控器发射信号时序图2遥控编码脉冲(3)(4),,,SOSO,36:,TC9021F,,940nm76H,3图3第一次发送的遥控信号的编码脉冲图4第二以后连续发送的遥控信号的编码脉冲23,192TCP224TCP,a(8)a\26TCP,224TCP,,SO=/10,SO=/00,2TCP,SO=/00,SO=/10,4TCP2AT89C51,5,,A,34,74LS04AT89C51INT0TC9021图5红外遥控信号解码电路39021,,,AT89C51/T01,1ms;INT0,,,INT0,INT0,T0,1ms,INT0,678T0INT0图6主程序流程图图7定时器T0中断程序流程图图8外部中断INT0中断程序流程图(下转第40页)372007924864Matlab:filCoeff=read(B);%Matlabc=conv(round(x),filCoeff);%Matlabsubplot(1,2,1)plot(round(x));%Matlabtitle(cMatlabc);subplot(1,2,1)plot(c(1:200));%Matlabtitle(cMatlabc),,Matlab,Matlab:MatlabCCS图3Matlab中滤波前后结果4DSPFIR,Matlab,,DSP,Q,FIR,,,DSP,,Matlab,,MatlabDSPFIR,DSP,MatlabDSPFIR,TMS320C6713DSKMatlabDSP,DSP,,DSP参考文献[1],,.TMS320C6000DSPs[M].2.:,2003.[2].Matlab615[M].:,2003.[3],.DSP)))CCSDSP/BIOS[M].:,2004.[4],,.DSP)))Matlab[M].:,2003.[5].DSP[M].:,2004.[6],.)))[M].,.:,2005.[7].[M].2.:,2004.(上接第37页)4,,,,,,,,,参考文献[1].[M].:,2003.[2].MCS-51[M].:,1993.[3],,.[M].:,1991.李泽光男,1963年出生,毕业于西安电子科技大学,硕士,大连大学副教授主要研究方向为信息与信号处理,现从事电子信息工程专业教学和科研工作()029-8539877140:MatlabDSPFIR