usb技术及其驱动程序开发_(学士论文)

USBA1A0A2A3A4A5A6A7A8A9A11A10A10A12A13A141目录第一章绪论（1）11USB开发的历史背景（1）12目前通用的各种总线和接口的大体介绍（2）13USB总线的特点及开发意义（2）第二章USB技术规范（5）21USB的电器特性（5）22USB的数据包格式（8）23USB的传输类型（10）24USB的设备架构（13）第三章USB驱动程序的开发（20）31驱动程序与USB设备的通讯（20）32USB键盘驱动程序（24）321程序设计的基本思想（25）322部分程序代码的说明（28）33主机应用程序与虚拟设备的通信（37）331程序设计的基本思想（37）332部分程序代码的说明（38）总结（42）致谢（43）参考资料（44）附录（45）USBA15A16A17A18A19A20A21A22A23A24A25A26A26A27A28A292摘要关键词USB，通用串行总线，串行接口规范摘要本文主要介绍USB的技术规范以及驱动程序的具体开发，并通过一个USB键盘的实例来具体说明，展示了USB应用的大好前景。ABSTRACTKEYWORDSUSB,UNIVERSALSERIALBUS,SERIALINTERFACECRITERIONABSTRACTTHEPAPERMAINLYINTRODUCESTHEUSBSTECHNOLOGYCRITERIONANDHOWTODEVELOPADRIVERPROCEDUREOFUSB,ANDSHOWSUSTHEUSBSBEAUTIFULFUTUREBYEXPLAININGAUSBKEYBOARDSDRIVERPROCEDUREUSBA30A31A32A33A34A35A36A37A38A39A40A41A41A42A43A443第一章绪论USB（UNIVERSALSERIALBUS通用串行总线）是目前各个厂家投资最多的方向之一，从通用的鼠标键盘，到即插即用的USB硬盘，各种读写卡，带USB插口的相机等等相继推出，它有着其他总线不可比拟的优势，是今后PC外设的主流产品。11USB开发的历史背景随着电脑应用的拓展，PC机的外设越来越多，机箱后的插口也形形色色并行口，串行口，键盘口，鼠标口，游戏手柄接口，音频输入输出口，视频输出口等等等等。而按常规，用户为PC增加一个新的外设却有一套复杂的操作，至少需要作以下的工作首先打开音箱，安装新外设的接口插卡；其次，为了避免资源占用冲突，用户G5529G20047设G13634G17351线为新的外设插卡G17885G6333G2524G17878的IRQ,DMAG2656I/O口G3332G3348，G9994后安装外设的G20549G2172G12255G5219。G990G17860工作的G19394G20076是PC有G19492的I/O插G8145G7092G8873G9397G17287G7097G11422增加的外设需要；不G1867G3803G999G1006G11705G16794的G7234通用户G19602G1122G17885G6333G2524G17878的资源G2656G4448G6116复杂的安装工作。G3252G8504，G12628G2282外设G15929G1817方G8873，G1363之方G1427G7143行G1427G6116为各个PC厂家G19766G1032的G18337G3835G11752G12362G16850G20076。而G1000目前各种总线有着G17837G7691G18039G7691不G17287，有的是占用G1881G4396G17819多，有的是G17907G5242不G3827G5567，G3252G8504，G33241996G5192G2496开的G19766向PC机硬G1226G6228G7427工作G13785G1262G16770G990，COMPAQ,INTELG2656MICROSOFTG989家厂G2842G6564出了设G3803插G7562DEVICEBAYG8022G5577，USBG4613是设G3803插G7562的一种规G14551。用户G2494需G14469G17165G5468少的G7114G19400G4557USB设G3803G17839行安装G2656G18209G13634，G4613可以G1363用；G2490外，它G17836G6564G1391即插即用G2163G14033，用户可以G3324不G7041电的G5785G1929下G11464接G6238设G3803插G3324USB插口G990，从而G1363G17842接到PC机G990外设的G17842接G2656G18209G13634G2476G5483G5468G4493G7143。G10628G3324USB外设G5483到了G7368新G7368G5567的G2469展。G4396G1660G3132方G19766，以前的4G1818，8G1818的ONLYDISK（优盘），G17836有USB接口的读写卡，G10628G3324的10G20G的USBG12239G2172G5347硬盘，而G1000可以G7693G6466需要G14270G5061G13485G10995产厂家G16840G7138G10995产要G8726，需要多G3835的硬盘G4613G10995产出多G3835的硬盘；G17907G5242方G19766，G11013G1122USB20规G14551的出G10628，G6980G6466G1268输越来越G5567，以前的电脑G11536实G7114G1268输G6980G6466，G17836G1262出G10628一帧一帧的G17351G2172，G10628G3324的G6980码相机，网G990聊天摄像机等等，真正做到了实G7114G1268输；G3324办公用品方G19766，扫描仪，打印机等都出G10628了USB接口的产品，G1363G5483人们的工作G2656G10995活方G1427了许多。USBA45A46A47A48A49A50A51A52A53A54A55A56A56A57A58A59412目前通用的各种总线和接口的大体介绍PCI总线PCI总线是INTEL公司为PENTIUM处理G3132设计的一种新型标准总线，G17837种总线G6228G7427允许G5567G17907的G1881G4396，磁盘G2656视频访G19394。PCI总线结构的高G1268输G17907G5242G19492制了PCI接口的G6980量，一般G2494G14033有两到G989个（通常用G1122图形G2656硬盘控制G3132）。如果G6980G6466G17839行的是64位G1268输，系统G7114钟G17907G5242为33MHZ，G18039么最G3835G1268输G17907G5242为264MB/S，比较起USB20的最G3835G1268输G17907G5242为480MB/S来G16840，G17836是差了G5468多。一般PC厂家为了G17878应高G17907G6466G1268输G17907G5242G2656缩小接口卡的尺寸，PCI插G8145与PC，ISAG2656EISA不再兼G4493。PCI总线的最G3835G1268输G17907G5242为264MB/S，该G17907G5242G2494G14033G3324基G1122PENTIUM处理G3132的系统中G1363用64位软G1226才G14033达到。G3324一个基G112280486处理G3132的系统中，最G3835G6980G6466G1268输G17907G5242G2494有132MB/S。SCSI总线接口SCSI是一种智G14033型的总线子系统，可以支持多个外设同G7114协同操作，每个设G3803都有一个优先级。单个总线系统最多可以支持7个设G3803。既可支持高质量的接头G2656电缆，也支持低质量的接头G2656电缆。而G1000G3324G5567G17907G1268输G2656增强型外设的支持方G19766有G5468G3835的潜力。目前各种SCSI总线中，最好的ULTRASCSI总线支持32位G6980G6466总线，最G3835G6980G6466G1268输率为40MB/S，可接到的最多设G3803G6980为15个。IDE接口（AT总线）IDE接口一般用G1122磁盘G2656光盘接口，它的特点是磁盘控制G3132做G3324G20549G2172G3132里G19766，通G17819一个电缆G11464接与主板G17842接。G17837G7693电缆允许多个G20549G2172G3132G17842接到系统，而不G5529担心总线G2656控制G3132冲突等G19394G20076。通常IDE接口G17836包含至少32KB的磁盘缓G4396。G10628G3324典型的PC机主板G990有两个IDE接口，每个接口可以G17842接两个硬盘或G13785一个硬盘G2656一个光G20549，即最多可以接四个设G3803，G6980G6466G1268输率最G3835可以达到166MB/S。1394接口1394接口有着G5468多G2656USB相类似的特点，但是目前G11013G11221394外设G17819G1122昂贵，G2494G14033用G1122公司或G13785高端用户，所以G17836没有G6116为广G3835PC厂家所支持并流行起来的接口。13USB总线的特点及开发意义USB作为计算机结构的一种新的扩展，主要致力G1122计算机电话一体G2282G2656应USBA60A61A62A63A64A65A66A67A68A69A70A71A71A72A73A745A75A76A77A78用类消G17165产品。它的G6980G6466G1268输G17907率比串、并口都要高,USB总线G1867有G7114分复用的特点,多个不同G17907G5242的USB外设可以通G17819集线G3132同G7114G17842接到同一台计算机的同一个USB口G990,G3324USB总线带宽允许的G5785G1929下,多个外设可以同G7114工作而不相互影响。USBG1268输G17907率G17878用G1122计算机的中低G17907外设,USB高G17907模G5347下支持实G7114的视频、音频G2656压缩的视频G6980G6466G1268输。G10628G3324G10995产的PC都G18209G3803了USB接口，MICROSOFT的WIN98,NT,WIND2000,WINDOWSXP以及MACOS，LINUX,FREEBSD等流行的操作系统都增加了G4557USB的支持。USB有如下的特点G2656优点（1）G17907G5242G5567。USB11标准有高G17907G2656低G17907两种工作方G5347，主模G5347为高G17907模G5347，G17907率为12MBPS/S。USB20G6238G17907G5242G6564高到480MBPS/S，可以G3324G990G19766开G2469G2163G14033G7368多的电子产品，并G1000，G3324USB20G990，多个高G17907外设可以同G7114运行。（2）设G3803G18209G13634G2656安装G4493G7143。如G990所G17860，所有USB设G3803支持即插即用，系统G4557其G17839行G14270G2172G18209G13634，彻底抛G5335了G17819G2447的G17351线G2656G6332码开G1863G18209G13634。（3）G7143G1122扩展。通G17819G1363用HUB，理G16782G990可最多接127个外设。标准的USB电缆G19283G5242为3M（低G17907为5M）。通G17819HUB或G13785中继G3132可G1363外设G17329G12175达到30M。可以G1363用多种G17842接方G5347G17839行扩展，图11是一个典型的外设G18209G13634方G7708。A79HUBHUBHUB图11（4）G14033G3827G18331用总线G1391电。USB总线G14033G6564G1391最G3835电压5V，最G3835电流500MA。G17837G7691G4613G2490外为G7588G1135低电压电流的USB外设G6564G1391G20081外电源。（5）G1363用G9801活。USBG1861有四种G1268输模G5347，控制G1268输，同G8505G1268输，中G7041G1268A80A81A77A78A77A78A77A78A77A78A77A78HUBUSBA60A61A62A63A64A65A66A67A68A69A70A71A71A72A73A746输G2656G6221量G1268输（G17837G1135G1881G4493的G13466G14422G3324G12544G1120G12468有G16826G13466的G1183G13473），以G17878应不同的需要。基G1122以G990的G17837G1135优G1122其他总线的特点，开G2469USB是势G3324G5529行的方向，也是G7424G16782G7003所要G11752G12362的G5859G1053。但是，随之G19394G20076也G4613来了，G4625G12661操作系统为USB设G3803G6564G1391了用户需要的G20549G2172G12255G5219，G3324一般G5785G1929下，设G3803一插到PCG990G4613可以G1363用了，G17837是最好不G17819的G1119G5785。但是，G1119实G990并不是如G8504，G10628G3324G5062G13475有G990G2327种不同的设G3803，而G1000每天G17836有许多不同的设G3803G3324G19394G1002，操作系统不可G14033为所有的设G3803G6564G1391G1852G18108的G20549G2172G12255G5219；而G1000，即G1363G6564G1391了通用的G20549G2172G12255G5219，G14033G3827G20549G2172USB设G3803G17839行工作，G18039也可G14033是G19036G4557G7588一类设G3803G6564G1391的通用G20549G2172G12255G5219，许多个G2047设G3803的优点G3324G17837种通用的G20549G2172G12255G5219G20549G2172下，不G14033G2469G6393出来；G2490外，作为G6117们消G17165G13785而G16340，总不G14033G14469了相G4557多的G19077来用一个用G5468少的G19077G1092的设G3803G4613G14033实G10628的G2163G14033，G17837G4557设G3803G2656人来G16840，都是一种G9022G17165。G3324G2419有G20549G2172G12255G5219的基G11796G990，G14270G5061开G2469出设G3803新的G2163G14033，或G13785G14270G5061G5190G14042从头做起，都是一种不G19181的G17885G6333。G7424G16782G7003G4448G6116的G1863G1122USB键盘的G20549G2172G12255G5219开G2469，G4613是基G1122G17837种目的而设计的。USBA60A61A62A63A64A65A66A67A68A69A70A71A71A72A73A747第二章USB技术规范设计G56G54G37的目标G4613是G1363不同厂家所G10995产的设G3803可以G3324一个开G6930的体系下G5483到广G8879的G1363用。G56G54G37G21G17G19规G14551G6925G17839了G1427G6670G2842G2165或家用电脑的G10628有体系结构，G17839而为系统G10995产G2842G2656外设开G2469G2842G6564G1391了G17287G3827的G12366G19400，以用来G2031G17908多G2163G14033的产品G2656开G2469广G19432的G5078G3342，而G1000不G5529担心G3845G2447G7099的接口，G3845G2447兼G4493G5627。下G19766从G1128个方G19766G12628要G1183G13473G8504规G14551。21USB的电器特性USB的电G8680特G5627主要是描G17860G1461G2507的G2469G17877及电压分G5079G5785G1929。下G19766G6117们G4570分G2047G4557其G17839行G16826G13466G1183G13473。1、信号的发送USB通常G1363用一种差分的输出G20549G2172G3132来控制G6980G6466G1461G2507G3324USB电缆G990的G2469G17877，一个USB设G3803端的G17842接G3132是G11013D、D及VBUS，GNDG2656其它G6980G6466线构G6116的G12628G11713G17842G13505电G17347，并要G8726G17842接G3132G990有电缆G4643G15121，以免设G3803G3324G1363用G17819G12255中G15999G6451G3363。它有两种工作G10378G5589，即低G5589G2656高G5589。G3324低G5589G7114，G20549G2172G3132的G19757G5589输出端的工作电压VOG2476G2172G14551G3272为0G79403V，G1000接有一个15KG161的接G3332G17139G17745。处G1122差分的高G5589G2656低G5589之G19400的输出电压G2476G2172应G4625量G1457持G5191G15925，以G14033G5468好G3332G1955小G1461G2507的G6209G7366G2476形。下图是USB电缆的G12046G5859图图21G3324G1231G1321G20549G2172G10378G5589下，USB设G3803G5529G20047G14033接G6922如图22所G12046的G8886形。G17837G1135G8886形从一个输出G19471G6251为3PG161的G5670流电压源G11464接G17839入每一个USBG6980G6466口。高G17907USB设G3803的G17842接电缆是G19471G6251为90G161G10215，最G3835单G17347G7114G5322为26NS的G4643G15121G2464G13490线电缆，其到达的最G3835G17907率为480MB/S，并G1000每个G20549G2172G3132的G19471G6251G5529G20047G332428G161G79444G161之G19400。低G17907USB设G3803G3324插口端G5529G20047要有一个带有串行口G17842接G3132的可控制电缆，其G17907率为12MB/S。G5415电缆与设G3803相G17842G7114，G3324D/D线G990G5529G20047要有一个200G794450PF的单G13468端电G4493G3132。低G17907电缆的G1268G6785G7114G5322G5529G20047小G112218NS，从而G1457G16789G1461G2507G3324其G990G2331G8851或USBA82A83A84A85A86A87A88A89A90A91A92A93A93A94A95A968G13785下G19489G8851的G12544一个中点产G10995。USBG1461G2507的G2469G17877有其G2469G17877的标准，G1867体如G1593221所G12046，G3324该G15932中，JG2656KG17837两个G6980G6466G5589是两个G17935G17765电G5191，G3324系统中，通常G15999用来G17839行G1144G6454差分G6980G6466。差分G6980G6466G1461G2507的G2469G17877并不G1863心G1461G2507G13475G17819的G3332方电G5191G5785G1929，它G2494要G8726G7737电压G332413G79420V之G19400。G2490外，G3324接G6922端，G12366G19398G5589G2656工作G5589G3324G17935G17765G990分G2047与JG5589G2656KG5589等G1227。一般而G16340，G6980G6466，G12366G19398G1461G2507及唤醒G1461G2507的G2469G17877标准均G11013端口的设G3803类型所决定。如果G17842结的是高G17907设G3803，则USBG1363用所规定的高G17907率来G2469G17877G1461G2507并G1000有G5468G5567的G990G2331G8851G2656下G19489G8851G7114G19400，甚至G17836可用低G17907率来G2469G17877G6980G6466，而G4557G1122G1593221中所G12046的低G17907G1461G2507G2469G17877标准仅用G3324低G17907设G3803与其所G17842接的端口之G19400G990G2331G8851G2656下G19489G8851G7114G19400较G19283。USB设G3803是一个智G14033型的设G3803，G5415它G2469G10628主机或集线G3132的下形端口G990没有设G3803G17842接G7114，端口G990G14270带的RPU电G19471G4570G1363DG2656DG990的电压低G1122主机或集线G3132端口的单G13468端电压，G8504G7114该端口不是G11013集线G3132控制的，G17837G4570G3324下形端口产G10995一个SE0G5589。如果主机或集线G3132不G3324控制G6980G6466线并G1000下形端口的SE0G5589的持G13505G7114G19400超G1781925NS，则G8504G7114USB设G3803G4570中G7041G1461G2507的G2469G17877，G8504G7114G15932G12046PCG4570认定没有设G3803G17842接到端口G990。如果集线G3132G2469G10628其中一G7693G6980G6466线G990的电压G3835G1122它的G1032界值的持G13505G7114G19400超G1781925US，则G15932G12046PCG11705道端口G990G17842接了一个设G3803，G1427开始G1461G2507的G2469G17877。表21信号发送的标准A97A98A99A100A101USBA102A103A104A105A101DA106D_A107A108USBA109A110USBA99A100A105A101A111A112A113A114A99A100A115A116A117A118A119A120A121A122A123A124A125A126A111A112A127A108A128A121A115A116A91A129A130A131A132A133A134A104A135A133A101A136A137A138A139A140A141A139A142A1432A1442USBA145A146A147A148A149A150A151A152A153A154A155USBA82A83A84A85A86A87A88A89A90A91A92A93A93A94A95A969A156A157A158A159A136A137A131A160A90A161A127A101A162A102A103A104A163A164A165A128A127A166A167A127A101A168A169A102A103A104A170A171A172A173A103A174A172A173A175A176A101A1771A178DVOHMIND200MVDVIHMINDD200MVA175A176A101A1770A178DVOHMIND200MVDVIHMINDD200MVA179A167A127A1770A178A163SE0A166DA180DVIHZMINDVILMAXDVIHZMINDVIHZMINDVIHZMINDG39G72G89G76CG72EG91G87G72NSG76G82NG18G18锁住G17837个设G3803G4557G16949，G3252为如果不锁住，则其他的G44G53P操作可G14033G1262破G3363G17837个G18G18G44G53P的处理。G47G82CG78G39G72G89G76CG72G71G91G18G18G5483到G5415前的G7644单G1815以及G5415前G7644单G1815的次G2163G14033G1207码PG44G50G66G54TG36CG46G66G47G50CG36TG44G50G49G44G85PG54G87G68CG78G44G82G42G72G87CG88G85G85G72NG87G44G85PG54G87G68CG78G47G82CG68G87G76G82NG44G85PG56G47G50G49G42G48G76NG82G85G41G88NCG87G76G82NG44G85PG54G87G68CG78G16G48G76NG82G85G41G88NCG87G76G82NG49TG54TG36TG56G54SG87G68G87G88SG54TG36TG56G54G66G54G56CCEG54G54G18G18判G7041G8504次G2163G14033G1207码SG90G76G87CHG48G76NG82G85G41G88NCG87G76G82NCG68SG72G44G53PG66G48G49G66G54TG36G53TG66G39EG57G44CEG18G18如果为插入设G3803，则处理相应的子函G6980SG87G68G87G88SPNPG54G87G68G85G87G39G72G89G76CG72G43G68NG71G79G72G85G73G71G82G15G44G85PBG85G72G68G78CG68SG72G44G53PG66G48G49G66QG56EG53YG66G53EG48G50G57EG66G39EG57G44CEG18G18如果为G7609询拔出设G3803，则处理拔出设G18G18G3803子函G6980SG87G68G87G88SPNPQG88G72G85G92G53G72G80G82G89G72G39G72G89G76CG72G43G68NG71G79G72G85G73G71G82G15G44G85PBG85G72G68G78CG68SG72G44G53PG66G48G49G66G54G56G53PG53G44G54EG66G53EG48G50G57G36G47G18G18为G5859外拔出设G3803SG87G68G87G88SPNPG54G88G85PG85G76SG72G53G72G80G82G89G68G79G43G68NG71G79G72G85G73G71G82G15G44G85PBG85G72G68G78CG68SG72G44G53PG66G48G49G66G53EG48G50G57EG66G39EG57G44CEG18G18为正常拔出设G3803SG87G68G87G88SPNPG53G72G80G82G89G72G39G72G89G76CG72G43G68NG71G79G72G85G73G71G82G15G44G85PG85G72G87G88G85NSG87G68G87G88SCG68SG72G44G53PG66G48G49G66QG56EG53YG66G54TG50PG66G39EG57G44CEG18G18为G7609询停止G1363用设G3803，则设G13634相应位G71G91G16PG68G88SG72G71G87G85G88G72G71G91G16G44G50G39G76SG68BG79G72G71G87G85G88G72USBA187A188A189A190A191A192A193A194A195A196A197A198A198A199A200A20134SG87G68G87G88SPNPG39G72G73G68G88G79G87G43G68NG71G79G72G85G73G71G82G15G44G85PBG85G72G68G78CG68SG72G44G53PG66G48G49G66G54TG50PG66G39EG57G44CEG18G18为停止设G3803SG87G68G87G88SPNPG54G87G82PG39G72G89G76CG72G43G68NG71G79G72G85G73G71G82G15G44G85PBG85G72G68G78CG68SG72G44G53PG66G48G49G66CG36G49CEG47G66G53EG48G50G57EG66G39EG57G44CEG18G18为取消拔出设G3803CG68SG72G44G53PG66G48G49G66CG36G49CEG47G66G54TG50PG66G39EG57G44CEG18G18为取消停止设G3803，则设G13634相应位G71G91G16PG68G88SG72G71G73G68G79SG72G71G91G16G44G50G39G76SG68BG79G72G71G73G68G79SG72G71G72G73G68G88G79G87G18G18G3324缺省G5785G1929下，处理通用的子函G6980SG87G68G87G88SPNPG39G72G73G68G88G79G87G43G68NG71G79G72G85G73G71G82G15G44G85PG56NG79G82CG78G39G72G89G76CG72G71G91G18G18解锁设G3803并返回G85G72G87G88G85NSG87G68G87G88S中断传输图3G26中G7041G1268输的G12255G5219流G12255USBA228A229A230A231A232A233A234A235A236A237A238A239A240A241A234A242A243A202A203A244A245A246A247A248A249A250A251A221A252A253A254A249A255A201A0A1A225A226A227USBA187A188A189A190A191A192A193A194A195A196A197A198A198A199A200A20135G56SBG46BG71的实G10628目的，G4613是G7693G6466G2419始键盘G6980G6466来应答G58G76N3G21请G8726G53G72G68G71G41G76G79G72（），并实G106281G19秒的G5322G7114。G3324描G17860如G1321处理读“G44G53P”之前，G5529G20047讨G16782G56G54G37G43G44G39键盘如G1321产G10995G6980G6466。键盘以一个8位G6980G6466报告相应G56G54G37中G7041G1268输。G17837个G3371的格G5347定G1053G3324G43G44G39（人工接口设G3803）类中有定G1053。G5415按下G2656松开一个键G7114，G4613产G10995一个键盘G6980G6466报告。即G1363没有G2469G10995击键的G2172作，也定期产G10995一个报告。G17837G4613是G3324G56G54G37总线G990G2469G10995的G2172作。G56G54G37类G20549G2172G12255G5219定期开始一个中G7041G1268输。一般G56G54G37键盘都规定了一个每多少秒G2469G10995一次中G7041G1268输，用G1122实验的键盘G7114每8G80SG2469G10995一次。但是，G56G54G37键盘有G12366G19398的G7114候，如果G3324G12366G19398G7114G19400段G1881没有G2469G10995G10378G5589G6925G2476，键盘以G49G36G46相应每个中G7041请G8726。G3324G12366G19398G7114G19400段（5G19G19G80S左右）的最后，键盘返回G6980G6466。可以G3324缺省G12661道G990G1363用类特定的的函G6980读取G2656G6925G2476G12366G19398率（G56SBG42G72G87G44G71G79G72G53G68G87G72）。G56SBG46BG71G2469出“中G7041G1268输”G56G53G37接G6922G1231G1321键盘报告。如果没有键盘键G15999按下，8字G14422的键盘报告G1852为G19，G56SBG46BG71的“读”G44G85P处理G12255G5219忽略G1852为G19的G1231G1321键盘报告。G5415一个键G15999按下G2656松开，一个真正的G20549G2172G12255G5219G1262返回读取的G6980G6466。G56SBG39G82G44NG87G72G85G85G88PG87TG85G68NSG73G72G85（）的G12255G5219流G12255如图36，下G19766是主要的伪G1207码G49TG54TG36TG56G54G56SBG39G82G44NG87G72G85G85G88PG87TG85G68NSG73G72G85G44G49PG56G54G37G46G37G39G66G39EG57G44CEG66EXTEG49G54G44G50G49G71G91G15G44G49PG57G50G44G39G56SG72G85G37G88G73G73G72G85G15G56G47G50G49G42G56G47G50G49G42G50G88G87PG88G87G37G88G73G73G72G85G54G76ZG728G18G18为G56G53G37分G18209一个8字G14422的G1881G4396G56G54G43G50G53TG56G85BG54G76ZG72SG76ZG72G82G73SG87G85G88CG87G66G56G53G37G66G37G56G47G46G66G50G53G66G44G49TEG53G53G56PTG66TG53G36G49G54G41EG53PG56G53G37G88G85BPG56G53G37EG91G36G79G79G82CG68G87G72PG82G82G79G49G82NPG68G74G72G71PG82G82G79G15G56G85BG54G76ZG72G18G18G5483到起始的G7114G19400计G6980，以用G1122检G7609后来循环是G2554超G7114。G47G36G53G42EG66G44G49TEG42EG53G54G87G68G85G87TG76CG78CG82G88NG87USBA187A188A189A190A191A192A193A194A195A196A197A198A198A199A200A20136G46G72QG88G72G85G92TG76CG78CG82G88NG87G56G47G50G49G42G56NG76G87SG50G731G19G19NSG46G72QG88G72G85G92TG76G80G72G44NCG85G72G80G72NG87G18G18循环，G5483到键盘G6980G6466，并G17839行处理。G90HG76G79G72G87G85G88G72G18G18建立中G7041G1268输请G8726。G56SBG37G88G76G79G71G44NG87G72G85G85G88PG87G50G85G37G88G79G78TG85G68NSG73G72G85G53G72G84G88G72SG87G88G85BG15G56G85BG54G76ZG72G15G71G91G16G56SBPG76PG72G43G68NG71G79G72G15G18G18指定G12661道G2489柄G56SG72G85G37G88G73G73G72G85G15G49G56G47G47G15G50G88G87PG88G87G37G88G73G73G72G85G54G76ZG72G15G18G18输入G6980G6466G56G54G37G39G66TG53G36G49G54G41EG53G66G39G44G53ECTG44G50G49G66G44G49G15G18G18指定为输入方向G49G56G47G47G18G18G16855用CG68G79G79G56G54G37G39G44，打开G56G54G37设G3803SG87G68G87G88SCG68G79G79G56G54G37G39G44G71G91G15G88G85BG18G18如果G5483到的G6980G6466为非G19，则退出循环，G3252为G6117们G5483到的实G19481的键盘G6980G6466。G76G73G88G85BG16G56G85BG37G88G79G78G50G85G44NG87G72G85G85G88PG87TG85G68NSG73G72G85G17TG85G68NSG73G72G85G37G88G73G73G72G85G47G72NG74G87HG50G88G87PG88G87G37G88G73G73G72G85G54G76ZG72BG85G72G68G78G66G66G76NG8764PG39G68G87G68G66G66G76NG8764G56SG72G85G37G88G73G73G72G85G18G18检G7609是G2554超G7114G47G36G53G42EG66G44G49TEG42EG53TG76CG78CG82G88NG87G49G82G90G46G72QG88G72G85G92TG76CG78CG82G88NG87G56G47G50G49G42G87G76CG78SG56G47G50G49G42TG76CG78CG82G88NG87G49G82G90G17QG88G68G71PG68G85G87G16G54G87G68G85G87TG76CG78CG82G88NG87G17QG88G68G71PG68G85G87G76G73G87G76CG78SG56NG76G87SG50G731G19G19NSG181G19G19G19G19G19G19G19G71G91G16G56SBTG76G80G72G82G88G87USBA187A188A189A190A191A192A193A194A195A196A197A198A198A199A200A20137SG87G68G87G88SG54TG36TG56G54G66G49G50G66G48EG39G44G36G66G44G49G66G39EG57G44CEBG85G72G68G78G56SG72G85G37G88G73G73G72G85G54G76ZG72G88G85BG16G56G85BG37G88G79G78G50G85G44NG87G72G85G85G88PG87TG85G68NSG73G72G85G17TG85G68NSG73G72G85G37G88G73G73G72G85G47G72NG74G87HG18G18释G6930G1881G4396并返回G10378G5589。EG91G41G85G72G72PG82G82G79G88G85BG85G72G87G88G85NSG87G68G87G88S控制传输图38控制G1268输的G12255G5219流G12255控制G1268输用来允许它的控制应用G12255G5219修G6925键盘G47EG39的G10378G5589，G17837G7691G4613可以G16840G7138如G1321G3324到端点G19的缺省G12661道G990G17839行控制G1268输。“写”G44G53P处理G12255G5219G2469G17877写缓冲区的G12544一个字G14422G13485键盘，作为G43G44G39“输出报告”。报告的低G989位G4557应G1122G49G88G80G47G82CG78G15CG68PSG47G82CG78G2656G54CG85G82G79G79G47G82CG78键。下G19766是控制G1268输函G6980G56SBG54G72NG71G50G88G87PG88G87G53G72PG82G85G87（）的伪G1207码CG82NSG87G56CG43G36G53G54ETG66G53EPG50G53TG19G91G199G18G18定G1053常量报告字G14422A79A2A211A3A4URBA196A10URBA207A5URBA61A6A255A201A0A1USBA187A188A189A190A191A192A193A194A195A196A197A198A198A199A200A20138G49TG54TG36TG56G54G56SBG5