采用单片机设计频率计_毕业论文

毕业设计论文采用单片计设计频率计系机电工程系专业姓名班级学号指导教师职称讲师设计时间2目录A1A23A3A0A4A6A74A3A5A4A9A8A10A11A12A13A14A15A10521A16A17A18A19522A16A17A20A21623A16A17A22A236A3A24A4A25A26A27A28A15A10731A29A30A31A32A33A34A35A36A37A38A39732A34A35A36A16A17A37A40A41733A42A43A44833189S51A29A30A40A418332A45A46A47A48A49A508333AT89S51A38A39A51A52A5132934A53A34A54A551035A56A57A54A5510A58A59A60A61A62A63A36A64A65A66A67A68A69A70A38A39A5111361A61A62A63A36A64A6511362A67A68A69A70A38A39A5112A3A71A4A25A26A72A28A15A101341A73A34A74A62A75A76A38A391342A74A62A77A78A511343A78A79A63A3616A80A81A82261A83A20262A84A8526A86A87A88A8928A90A91A291A92A93A94A95A96A97A98A99A100A983摘要随着电子信息产业的不断发展，信号频率的测量在科技研究和实际应用中的作用日益重要。传统的频率计通常是用很多的逻辑电路和时序电路来实现的，这种电路一般运行较慢，而且测量频率的范围较小。考虑到上述问题，本论文设计一基于单片机设计频率计。首先，我们把待测信号经过放大整形，然后把信号送入单片机的定时计数器里进行计数，获的频率值，最后把测得的频率数值送入显示电路里进行显示。本文从频率计的原理出发，介绍了基于单片机的频率计的设计方案，选择了实现系统的各种电路元器件，并对硬件电路进行了G1235G11507。关键字单片机G727频率计G727测量4第一章引言频率G1214器是数G4395电路中一G1022G1868G3423应用，实际的硬件设计用到的器件较多，G13864机G8616较G3809G7446，而且G1262产G10995G8616较大的G5322G17843。随着G3809G7446G2499G13546G12255逻辑器件的G5203G8879应用，G4570G1363整G1022系统大大G12628G2282。G6564G20652整G1319G5627G14033，G4439是G11464G6521用G2325进G2058数G4395来显示G15999测信号频率的一种测量G16025G13634。G4439不G1177G2499G1209测量G8503G5370G8886，方G8886，G989G16294G8886，G4586G14045G1926信号和G1866G1194G1867G7389G2620G7411的信号的频率，而且G17836G2499G1209测量G1194们的G2620G7411。经过G6925G16025，G2499G1209测量G14045G1926G4497G5242，G1582G6116数G4395G5347G14045G4497测量G1214G726G2499G1209测量电G4493G1582G6116数G4395电G4493测量G1214在电路中G3698G2164传G5875器，G17836G2499G1209G1582G6116数G4395G14045G6627G1214，计G1227器G12573。G3252G8504数G4395频率G1214在测量G10301理量方G19766的G5203G8879应用。频率计的设计原理实际上是测量单G1313时G19400G1881的G2620G7411数。这种方G8873G1825G2447了实测G1209G2081的G20056测，G2528时G14422G11477了G2022G2010频率的时G19400，G1823G7393了原来G20652频率G18331用测频G8181G5347而G1314频G8585G18331用测G2620G7411G8181G5347的测量方G8873G4396在G6454G6389G17907G5242慢的G13582G9869。通常G5785G1929G991计G12651G8611G12198G1881待测信号的G14045G1926G1022数，G8504时我们G12228G19404G19388时G19400G10381G12198。G19404G19388时G19400G1075G2499G1209大于G6122小于1G12198。G19404G19388时G19400G17246G19283，得到的频率值G4613G17246G1946G11842，G1306G19404G19388时G19400G17246G19283G2029G8611测一G8437频率的时G19400G19560G4613G17246G19283。G19404G19388时G19400G17246G11713，测得频率值G2059G7044G6466G17246G5567，G1306测得的频率G12946G5242G4613G2475G5445响。本论文的任务是设计一G1022基于单片机技术的数G4395频率计。主要介绍了整形电路、控G2058电路和显示电路的构G6116原理，G1209及G1866测频的基本方G8873。进行了相应的硬软件设计。A101A102A103A104A105A106A107A108A109A1075第二章频率计总体方案设计21方案比较方案一G726本方案主要G1209单片机G1038核心，利用单片机的计数定时功G14033来实现频率的计数并且利用单片机的动态扫描把测出的数G6466送到数G4395显示电路显示。G1866实原理框图如21所示21A110A111A112A113A114A115A110A111A116A117A118A110A111A119A120A121A122A123A124A125A126A127A128A129A119A120A130A126A131A132A133A134A129A135A136A137A138A133A134A129A139A140A141A142A133A134A129A143A144A133A134A129A145A122A133A134A129A146A147A133A134A129A148A149A150A151A133A134A152A140A153A130A154A155A113A114A156A115A157A11522A158A15122A110A111A116A113A114A156A115A159A160A161A162A163A164A159A160A165A166A167A168A169AT89S51A133A134A122A123A150A151A133A134A170A171A172A173A163A164A148A149A150A151A124A146A147A124A143A144A133A134A145A122A124A131A132A133A134A139A140A141A142A133A134622方案论证方案一G726本方案主要G1209单片机G1038核心，G15999测信号先进入信号放大电路进行放大，再G15999送到G8886形整形电路整形，把G15999测得G8503G5370G8886G6122者G989G16294G8886G1038方G8886。利用单片机的计数器和定时器的功G14033对G15999测信号进行计数。G13546写相应的G12255序G2499G1209G1363单片机自动调G14422测量的量G12255，并把测出的频率数G6466送到显示电路显示。方案二G726本方案G1363用大量的数G4395器件，G15999测量信号放大整形电路变G6116计数器所要求的G14045G1926信号，G1866频率于G15999测信号的频率相G2528。G2528时时基电路G6564供标G1946时G19400基G1946信号，G1866G20652电平持续时G194001S，当1S信号来到时，G19404G19388开通，G15999测G14045G1926信号通过G19404G19388，计数器开始计数，G11464到1S信号结束G19404G19388关闭，停止计数。若在G19404G19388时G194001SG1881计数器计得的G14045G1926G1022数G1038N，G2029G15999测信号频率FXNHZ。逻辑控G2058电路的作用G7389两G1022G726一是产G10995锁G4396G14045G1926，是显示器上的数G4395稳定G727二是产G10995清零G14045G1926，G1363计数器G8611G8437测量从零开始计数。23方案选择G8616较G1209上两种方案G2499G1209知道，方案一得核心是单片机，G1363用的元器件少，原理电路G12628单，调试G12628单只要G6925变G12255序的设定值G2029G2499G1209实现不G2528频率范围的测试G14033自动选择测试的量G12255。与方案一相G8616较方案二G2029G1363用了大量的数G4395元器件，原理电路G3809G7446，硬件调试麻烦。如要测量G20652频的信号G17836需要G2164上G2010频电路，G1227格相对G20652了G9869。基于上述，所G1209选择了方案一。A174A175A176A177A178A179A180A181A182A1807第三章系统硬件设计31一般数字式频率计的原理数G4395G5347频率计是测量频率最常用的G1214器之一，G1866基本设计原理是首先把待测信号通过放大整形，变G6116一G1022G14045G1926信号，然后通过控G2058电路控G2058计数器计数，最后送到译码显示电路里进行显示，G1866基本构G6116框图如图31所示待测信号A183A184A185A186A187A188A189A190A191A19232频率计方案的概述本频率计的设计G1209AT89S51单片机G1038核心，利用G4439G1881部的定时/计数器完G6116待测信号G2620G7411/频率的测量，单片机AT89S51G1881部G1867G73892G102216G1313定时/计数器，定时/计数器的工作G2499G1209由G13546G12255来实现定时，计数和产G10995计数溢出时中断要求的功G14033。在定时器工作方G5347G991，在G15999测时G19400G19400G19560G1881，G8611来一G1022机器G2620G7411，计数器自动G21641，这样G1209机器G2620G7411G1038基G1946G2499G1209用来测量时G19400G19400G19560。在计数器工作方G5347G991，G2164至外部引脚的待测信号发G10995从1到0的跳变计数器G21641，这样在计数G19404G19388的控G2058G991G2499G1209用来测量待测信号的频率。外部输入在G8611G1022机器G2620G7411G15999G18331用一G8437，这样查测一G8437从1到0的跳变至少需要2G1022机器G2620G7411，所G1209最大计数G17907率G1038时钟频率1/24。定时/计数器的工作G7389运行控G2058G1313TR控G2058，当TRG13634，定时/计数器开始计数G726当TR清0，停止计数。本设计终合考虑了频率测量G12946G5242和测量反应时G19400的要求。例如打要求频率测量结果G10383G1313G7389效数G4395，这时如果待测信号的频率G10381HZ，G2029计数G19404G19388G4497G5242必须大A193A194A195A196A197A198A199A200A201A197A198A202A203A204A205A197A198A206A207A208A197A1988于1000S。G1038了兼顾频率测量G12946G5242和测量反应时G19400的要求，把测量工作G2010G1038两种方G8873G726（1）当待测信号的频率100HZ时，定时/计数器构G6116G1038计数器，G1209机器G2620G7411G1038基G1946，由软件产G10995计数G19404G19388，计数G19404G19388G4497G52421S时，即G2499满足频率测量结果G10383G1313G7389效数G4395。（2）当待测信号的频率100HZ时，定时/计数器构G6116G1038定时器，由频率计的处理电路把待测信号变G6116方G8886，方G8886G4497G5242G12573于待测信号的G2620G7411。这时用方G8886G1582计数G19404G19388，当待测信号的频率100HZ，G2620G7411G103810MS，G1363用12HZ时钟的最小计数值G103810000，完全满足测量G12946G5242的要求。33单片机33189S51一般概述该AT89S51是一G1022G1314功耗，G20652G5627G14033CMOS8G1313微控G2058器，G2499在4KG4395G14422的系统G1881G13546G12255的闪G4396G4396储器。该设备是G18331用ATMEL的G20652密G5242非易失G5627G4396储器技术和符合工业标G1946的80C51指令集合引脚。芯片上的FLASHG12255序G4396储器课重G7044G13546G12255的系统G6122常规非易失G5627G1881G4396G13546G12255。通过结合通用8G1313中央处理器的系统G1881课G13546G12255闪G4396的单芯片，AT89S51是一G1022功G14033强大的微控G2058器G6564供了G20652G5242灵活的和G1867G7389G6116本效益的解决办G8873，G2499在许多嵌入G5347控G2058中应用。在AT89S51G6564供G1209G991标G1946功G14033G7264KG4395G14422的FLASH闪G4396，128G4395G14422的RAM,32G1022I/O线，看G19388狗定时器，两G1022数G6466指针，两G102216G1313定时器/计数器，5G2533量两G13435中断结构，全G2464工G1030行G12483G2487，片上G6403G14645器和时钟电路。G8504外，AT89S51设计的G19757态逻辑G6817作到零频率和G6915持两种软件G2499选电G8181G5347。G12366G19398G8181G5347停止的CPU，G2528时G1813许的RAM，定时器/计数器，G1030行G6521G2487和中断系统G13499续运作。在G6493电G8181G5347G1457G4396RAMG1881G4493，G2499停止G6403G14645器，停止G6403G14645器，停止所G7389G1866G1194芯片的功G14033，G11464到G991一G1022外部中断G6122硬件G3809G1313。332引脚功G14033G16840G7138A209A210A211A212A213A214A215A216A217A2159VCCG726电G9316电G2399GNDG726G6521G3332G9869P0G2487G726P0G2487是一G134648G1313G9443G7509开路G3423G2464G2533I/OG2487，G1075即G3332G3348/数G6466G5647线G3809用G2487。作G1038输出G2487用时，G8611G1313G14033G20549动8G1022TTL逻辑G19388电路，对G12483G2487写G256IG257G2499作G1038G20652G19471G6251输入G12483用。在G16787问外部数G6466G4396储器G6122G12255序G4396储器时，这G13464G2487线G2010时G17728G6454G3332G3348（G13148G1313）和数G6466G5647线G3809用，在G16787问G7411G19400G9620活G1881部上G6301电G19471。在FLASHG13546G12255时，P0G2487G6521指令G4395G14422，而在G12255序效G20576时，要求外G6521上G6301电G19471。P1G2487G726P1是一G1022G5114G1881部上G6301电G19471的8G1313G2464G2533I/OG2487，P1的输出G13543G1926G13435G2499G20549动4G1022TTL逻辑G19388电路。对G12483G2487写G256IG257，通过G1881部的上G6301电G19471把G12483G2487G6301到G20652电平，G8504时G2499作输入G2487，作输入G2487G1363用时，G3252G1038G1881部G4396在上G6301电G19471把G12483G2487G6301到G20652电平，G8504时G2499作输入G2487。作输入G2487G1363用时，G3252G1038G1881部G4396在上G6301电G19471，G7588G1022引脚G15999外部信号G6301G1314时G1262输出一G1022电G8981。333AT89S51原理图如图32G3A218A219A220A221A222A223A224A225A226A227A228A229A230A2181034分频电路本G8437设计G18331用的是G14045G1926定时测频G8873，由于考虑到单片机的定时计数器得计数G14033G2159G7389G19492，G7092G8873对过G20652频进行测量，所G1209我们对待测信号进行了G2010频，这样G14033G6564G20652测量频率的范围，G17836G14033相应的G6564G20652频率测量的G12946G5242。所G1209我们需要把待测信号进行G2010频。G1866原理图如33G3G3G3G3G3G3G3G3G3G3G3A231A232A231A233A234A233A234A235A236A23735显示电路我们测量的频率最终要显示出来G1855G8585LED数码G12661显示器由8G1022发G1821二G7509G12661G13464G6116。基中7G1022G19283G7477形的发G1821G12661G6502G2027G6116“日”G4395形，G2490一G1022G3290G9869形的发G1821G12661在数码G12661显示器的G2503G991G16294作G1038显示小数G9869用，G4439G14033显示各种数G4395及部G1233G14533文G4395G8609。LED数码G12661显示器G7389两种形G5347G726一种是8G1022发G1821二G7509G12661的G19463G7509G18129G17842在一G17227的，G12228之G1038G1861G19463G7509LED数码G12661显示器G727G2490一种是8G1022发G1821二G7509G12661的G19464G7509G18129G17842在一G17227的，G12228之G1038G1861G19464G7509LED数码G12661显示器。如G991图所示。G1861G19464和G1861G19463结构的LED数码G12661显示器各G12520G2022G8585G2529和G4445G6502G1313G13634是相G2528的。当二G7509G12661G4560通时，对应的G12520G2022G8585发G1154，由发G1154的G12520G2022G8585G13464合而显示的各种G4395符。8G1022G12520G2022G8585HGFEDCBA对应于一G1022G4395G14422（8G1313）的D7、D6、D5、。D4、D3、D2、D1、D0，于是用8G1313二进G2058码G4613G14033G15932示G8454显示G4395符的G4395形G1207码。在单片机应用系统中，数码G12661显示器显示常用两种办G8873G726G19757态显示和动态扫描显示。所G16871G19757态显示，G4613是G8611一G1022数码G12661显示器G18129要G2356用单G10432的G1867G7389锁G4396功G14033的I/OG6521G2487用于G12520G2022G8585G4395形G1207码。这样单片机只要把要显示的G4395形G1207码发送到G6521G2487A238A239A240A241A242A243A244A245A246A24411电路，G4613不用G12661G4439了，G11464到要显示G7044的数G6466时，再发送G7044的G4395形码，G3252G8504，G1363用这种办G8873单片机中CPU的开G19156小,G14033供G13485单G10432锁G4396的I/OG6521G2487电路很多。在单片机系统中动态扫描显示G6521G2487是单片机中应用最G1038G5203G8879的一种显示方G5347之一。G1866G6521G2487电路是把所G7389显示器的8G1022G12520G2022G8585AHG2528G2529G12483G17842在一G17227，而G8611一G1022显示器的G1856G1861G7509COM是各自G10432G12447G3332G2475I/O线控G2058。CPUG2533G4395G8585输出G2487送出G4395形码时，所G7389显示器G6521G6922到相G2528的G4395形码，G1306究G12467是G18039G1022显示器G1154，G2029G2474决于COMG12483，而这一G12483是由I/O控G2058的，所G1209我们G4613G14033自行决定G1321时显示G2750一G1313了。而所G16871动态扫描G4613是指我们G18331用G2010时的办G8873，G17730G8981控G2058各G1022显示器的COMG12483，G1363各G1022显示器G17730G8981G9869G1154。在G17730G8981G9869G1154扫描过G12255中，G8611G1313显示器的G9869G1154时G19400是G7509G1038G11713G7254的（G134341MS），G1306由于G1166的G16282G16285G7254G11053现G16949及发G1821二G7509G12661的G1325G17757效应，G4625G12661实际上各G1313显示器并非G2528时G9869G1154，G1306只要扫描的G17907G5242足G3827G5567，G13485G1166的G2372G16949G4613是一G13464稳定的显示数G6466，不G1262G7389闪G9877G5875。G1866原理图34G3A247A248A249A250A251A252A253A254A255A3636硬件设计简介和系统整体原理图361硬件设计G12628介G18331用外G6521G6566G3848输入G14045G1926信号，经过1N4538B（1N4538B的稳G2399值G10385V，稳G2399G1457G6264，G19462止输入电G2399过G20652G6451G1272电路）后经过两G1343574HC14传输G4570G14045G1926信号G17728G6454G1038方G8886信12号，输入到4040的时钟计数输入G12483，4040对输入的G14045G1926进行计数G2010频，G86114040G8611输入4096G1022外出，Q12输出一G1022G14045G1926。单片机的T1工作在计数G10378态，在单G1313时G19400G1881计数值G19512G1209单G1313时G19400即是G14045G1926的频率，单片机所测量的频率的范围G1881是1100MHZ，G2010两G7735测量，256K100MHZ,256KG1209G9911HZ。单片机测量后G4570测量结果G17728G6454G6116G1857G1313BCD码，通过单片机的G1030行G2487发送到数码G12661显示，数码G12661显示电路G18331用74LS164G20549动G1861G19464G7509数码G12661，G18331用G19757态显示。数G6466的传送G18331用G1030行G12239动方G5347，即单片机G4570G1857G1022显示码从G1314到G20652G17892G1313通过G1030行G2487G1209方G53470发送到数码G12661显示，数码G12661的显示G10386G1313，即显示单G1313G10381HZ和1KHZ。通过两G1022发G1821二G7509G12661G2010G2047指示，P10G20549动显示1HZ单G1313指示G9795，G1314电平G9869G1154G727P11G20549动显示1KHZ单G1313指示G9795，G1314电平G9869G1154。362系统整G1319原理图G3G3G3G3G3G3G16826G16277G19480录一G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3A1A0A2A3A4A5A6A7A8A613第四章系统软件设计41测频软件实现原理测频软件的实现是基于电路系统来进行设计的。本G8437设计G18331用的是G14045G1926定时测频G8873，所G1209在软件实现上基本G17993G10043系统的设计原理，进行测频。本G8437软件设计G16833G16340G18331用G8731G13546G16833G16340，在电G14053上G13546译通过后即G2499G991G17745到电路上的实际电路中，即G2499实现频率的测量。42软件流程图14A9A10T0A11A12A13A14T1A15A16A17A181A14A19A20A12A13A13A21A22A23A24A25A2664MSA14A22A234A27A43A28A29A30A31A32A334A107A31A32A7320HA330A34A35A37A38A39A40A14P11A260A41A35A34A35A42A44A261KHZA45A4624A44A47A48A49A16A50A516A44BCDA52A53A54A55A52A56A57A58A5950H,51H,52H,53H,54H,55HA60A61A62A63A64A65A66A67A68A69P10A700A109A64A71A110A701HZA72A74A75A76A77A78A76A79A53T1A80A78A76A79A56A81A82256A83A8440H,41H,42HA80A85A86A87A58T0,T1,A88A89T0,T1,A9021HA91A920A87A58A93A94A95A96A92256A97A98A93A94A99A100100M256KHZ,A54A55A101A91A102A551HZA56P10A920A103A104A105A63A64000000A9021HA91A920A72A74A106A93A78A76A79A56A81A824A83A108A111A8440H,41H,42HA112A113A114A115A116A106A117A118A119A56P12A113A114A920A65A66A120A121A67A122A123A12421HA120A121A125A126A93A94A127A113A114A128A129256KP35A120A121A701A106A130A116A93A113A114A131A132A133A134A9121HA110A1201P35A113A114A92A135A136A137A138A139A140A141T0,T1A142A143A14424A91A145A146A147A76A148A149A92BCDA52A56A53A54A55A52A60A61A62A56A148A149A83A108A111A8450H,51H,52H,53H,54H,55HYNNYNYYNNYNYA150A143A101A151A152A87A75A153A154A7515A87A58A93A94A131A132A133A134A9121HA921A56A155A156T1,TR10A85A86A87A58R64A157A158T0A704A159A65A66A160A161A157A1580A7064A162A159A65A66A160A161R6A1631A83A113A114A920A56A920A164A165256A97A98A106A130A93A94A133A13420HA113A114A921A56A921A164A92256A97A98A93A94A95A96A700A1664A159A65A66A160A161A87A58A93A94A131A132A133A134A9121HA921A56A155A167T1A69TR10A168A169A157A158R780R7A1631A83A113A114A920A56A920A164A1654A98YNYNNYA170A171A172A126A173A174A61A62T0A175A176A177A178T0A175A176A177A1781643程序设计ORG0000HLJMPMAINORG000BHLJMPCT0ORG0030HMAINMOVTH0,06HMOVTL0,00H设G13634定时时G19400G103864MSMOVSP,60HMOVIE,82HMOVTL1，00HMOVTH1，00HMOVTMOD，51HG727T0定时，T1计数，G18129工作在方G5347一MOVR6，4G727SETB20HG727定时器工作方G5347标G5547，20HG10381，测量时G19400G103864MS，G2554G2029G10384G12198CLR21HG727测量结束标G5547，21HG10381G2029测量结束MOVR7，80MOV40H，00HMOV41H，00HMOV42H，00HCLRP10G727指示显示单G1313G10381HZ，G1314电平G9869G1154发G1821二G7509G12661SETBP11G727只是显示单G1313G10381KHZ，G1314电平G9869G1154发G1821二G7509G12661MOVSBUF，0C0HJNBTI，A179A180A181A182A183A184A185A186A187A18517MOVSBUF，0C0HJNBTI，MOVSBUF，0C0HJNBTI，MOVSBUF，0C0HJNBTI，MOVSBUF，0C0HJNBTI，MOVSBUF，0C0HJNBTI，FINDKEYSETBP12MOVC,P12JCFINDKEYCLR21HSTARTG726SETBP35G727MOVC，P35JNCSTARTG3G3G3SETBTR0SETBTR1JNB21H，CLRTR0MOVA,P2ANLA,0FHMOVB,AMOVA,TL118ANLA,0FHSWAPAORLA,BMOV40H,AMOVA,TL1ANLA,0F0HSWAPAMOVB,AMOVA,TH1ANLA,0FHSWAPAORLA,BMOV41H,AMOVA,TH1ANLA,0FHSWAPAMOV42H,AMOVA,42HJNZFINDDATAMOVA,41HJNZFINDDATAG3LJMPNEXTSTARTG3G3频率G1314于256K，G6454G7735测量FINDDATAMOVR1,40HMOVR2,41HMOVR3,42HA179A180A181A182A183A184A185A186A187A18519LCALLBCDTREAT0MOVSBUF,50HJNBTI,MOVSUBF,51HJNBTI,G3G3G3G3G3G3MOVSBUF,52HJNBTI,MOVSUBF,53HJNBTI,MOVSBUF,54HJNBTI,MOVSUBF,55HJNBTI,CIRP10SETBP11LJMPKEYFINDNEXTSTARTSETBP35G727MOVC，P35JNCNEXTSTARTCLR20H设G136344G12198测量方G5347CLR21HSETBTR0G3G3G3MOVTH0,3CHMOVTL0,0B0HMOVR7,8020JNB21H,CLRTR0MOV40H,P0MOVA,P2ANLA,0FHMOV41H,AMOVA,TL1ANLA,0FHSWAPAORLA,41HMOV41H,AMOVA,TL1ANLA,0F0HSWAPAMOV42H,AMOVA,TH1ANLA,0FHSWAPAORLA,42HMOV42H,ACLRCRRCAXCHA,41HRRCAXCHA,42HA179A180A181A182A183A184A185A186A187A18521CLRCRRCAXCHA,41HRRCAG3G3G3XCHA,40HMOV41H,AMOVA,42HCLRCRRCAXCHA,41HRRCAXCHA,42HCLRCRRCAXCHA,41HRRCAG3G3XCHA,40HMOV41H,AMOVR1,40HMOVR2,41HMOVR3,42HLCALLBCDTREAT0MOVSBUF,50HJNBTI,MOVSUBF,51H22JNBTI,G3G3G3G3G3MOVSBUF,52HJNBTI,MOVSUBF,53HJNBTI,MOVSBUF,54HJNBTI,MOVSUBF,55HJNBTI,SETBP10CLRP11LJMPKEYFINDCT0JNB20H,NEXTCT0MOVTH0,06H64G8639G12198MOVTL0,00HDJNZR6,CT0RETIMOVR6,4SETB21HCLRTR1CT0RETIRETINEXTCT0MOVTH0,3CHMOVTL0,0B0H50G8639G12198定时DJNZR7,NEXTCT0RETSETB21HA179A180A181A182A183A184A185A186A187A18523MOVR7,80CLRTR1NEXTCT0RETRETITABDB0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90HBCDTREAT0PUSHACCG727G457024G1313二进G2058数G17728G6454G1038BCD码PUSHB7PUSHPSWG3G3G3G3G3G3MOV36,24MOVR7,0MOVR6,0MOVR5,0MOVR4,0LOOPCLRCMOVA,R1RLCAMOVR1,AMOVA,R2RLCAMOVA,R2MOVR3,ARLCAMOVR3,AMOVA,R4ADDCA,R424DAAMOVR4,AMOVA,R5ADDCA,R5DAAMOVR5,AMOVA,R6ADDCA,R6DAAMOVR6,AMOVA,R7ADDCA,R7DAAMOVR7,ADJNZ36H,LOOPMOVA,R4ANLA,0FHMOV50H,AMOVA,R4ANLA,0F0HSWAPAMOV51H,AMOVA,R5ANLA,0FHMOV52H,AA179A180A181A182A183A184A185A186A187A18525MOVA,R5ANLA,0F0HSWAPAMOV53H,AMOVA,R6ANLA,0FHMOV54H,AMOVA,R6ANLA,0F0HSWAPAMOV55H,APOPPSWPOPBPOPACCRETEND26结束语1结论基于单片机的频率计的设计G9053及到计G12651机的硬软件知G16794，通过对系统的设计和调试，本G8437设计主要完G6116了G1209G991工作G7261、G6564出基于单片机的数G4395频率计设计的基本方案G7272、完G6116了整形电路、G2528步电路、G2010频电路、主控G19388电路G12573相应的硬件电路设计及G1235G11507G7273、G13546译了数G4395G5347频率计的控G2058G12255序、数码G17728G2282G12255序、数G6466显示G12255序G12573系统软件G12255序G7274、对硬件电路进行了G1235G11507，进行了误差G2010析。2致谢首先在这里G5875谢XX老师认G11507的指G4560，本G8437设计的过G12255和结果G18129G13485了我很多G5875触。初G8437拿到毕业设计的题目时，G11507的是对数G4395频率计一G7092所知。在初G8437G16277到XX老师的时候，对频率G17836不了解，怎么设计，几乎没G7389什么想G8873。在XX老师的指G4560和讲解G991，对频率计的介绍G7389了一定的了解。后来通过不断的学习和查阅资料，终于清楚的知道了频率计的基本G5785G1929和设计的方案G7389了一定的理解。通过对各种G5627G14033的G8616较和所学知G16794G