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用什么方法可以区分哪一个是TX哪一个是RX，它们都是3.3V
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在线时间 小时
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才可以下载或查看，没有帐号？
请问各位网友怎么区分RX和TX,先谢啦
阅读权限104
在线时间 小时
如果是对机升级，直接把两根线交叉，用电脑刷机把GND、RX、TX连到升级小板上，联不上机就把RX、TX换下就OK了
阅读权限30
在线时间 小时
如果RX和TX接反了会不会损坏电脑，怎样才能快速判断接收机的TX和RX
在线时间 小时
我也在发愁这个呀
在线时间 小时
从usb出来的线，老板剪的只剩下3根了，红、黑、白，怎么区分呀？
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在线时间 小时
试一下 就知道，能用的时候说明就是接对了
阅读权限40
在线时间 小时
黑的是地。红的是信号出。白的是信号入
阅读权限15
在线时间 小时
换着试就行，烧不了
阅读权限15
在线时间 小时
一般前面的是RX后面的是TX&&其实不用一下就明确。呵。第一次不对。下次交换一下就可以了。不烧机不烧板的
阅读权限50
在线时间 小时
是呀，好像只能替换试一试了。
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Wuhan Qiji Technology Co., Ltd.武汉奇迹科技有限公司版权所有CC2500_百度百科
声明：百科词条人人可编辑，词条创建和修改均免费，绝不存在官方及代理商付费代编，请勿上当受骗。
是一款2.4GHz高性能射频收发器，设计旨在用于极低功耗RF应用。其主要针对工业、科研和医疗(ISM)以及短距离无线通信设备(SRD)。CC2500可提供对数据包处理、数据缓冲、突发传输、接收信号强度指示(RSSI)、空闲信道评估(CCA)、链路质量指示以及无线唤醒(WOR)的广泛硬件支持。可用于全球最为常用的开放式2.4GHz频率的RF设计。
CC2500应用领域
● 超低功耗无线收发器
● 无线传感网络
● 家庭和楼宇自动化
● 高级抄表架构(AMI)
● 无线计量
● 无线报警安全系统
CC2500性能参数
● 2400.0MHz～2483.5MHz工作频段。
● 高灵敏度(2.4kbps，2-FSK，1%误码率时为-104dBm)。
● 低电流消耗(接收模式，2.4kbps时仅17.0mA)。
● 最高可设置为+1dBm的发射功率。
● 支持1.2kbps～500kbps的数据传输速率。
● 支持多种调制模式(OOK、GFSK、2-FSK和MSK)。
● 提供对同步字检测、地址校验、灵活的数据包长度以及自动CRC处理的支持。
● 支持RSSI(接收信号强度指示)和LQI(链路质量指示)。
● 通过4线SPI接口与MCU连接，同时提供2个可设定功能的通用数字输出引脚。
● 独立的64字节RXFIFO和TX FIFO。
● 工作电压范围：1.8V～3.6V，待机模式下电流仅为400nA。
● 工作温度范围：-40℃～+85℃
CC2500原理图
CC2500电路原理
CC2500原理图
CC2500原理图
CC2500引脚定义
CC2500引脚定义
CC2500接线图
CC2500与5V单片机的连接（只适用于高阻引脚）
．TI官网介绍页面[引用日期]CC2500??；Pre-programthePKTLENmod(；register；to；??；SetPKTCTRL0.LENGTH_CONFI；Transmitatleast345bytes,；Internalbytecounterinpac；0,1,..........,88,......；Infinitepacketlengthenab；600byt
CC2500??Pre-programthePKTLENmod(600,256)=88.registerto??SetPKTCTRL0.LENGTH_CONFIG=0.Thetransmissionendswhenthepacketcounterreaches88.Atotalof600bytesaretransmitted.Transmitatleast345bytes,forexamplebyfillingthe64-byteTXFIFOsixtimes(384bytestransmitted).Internalbytecounterinpackethandlercountsfrom0to255andthenstartsat0again0,1,..........,88,....................255,0,........,88,..................,255,0,........,88,..................,255,0,.......................InfinitepacketlengthenabledFixedpacketlengthenabledwhenlessthan256bytesremainsofpacket600bytestransmittedandreceivedLengthfieldtransmittedandreceived.RxandTxPKTLENvaluesettomod(600,256)=88Figure12:PacketLength>25615.3PacketFilteringinReceiveModereceivemoderestarted(regardlessoftheMCSM1.RXOFF_MODEsetting).15.3.3CRCFilteringThefilteringofapacketwhenCRCcheckfailsisenabledbysettingPKTCTRL1.CRC_AUTOFLUSH=1.TheCRCautoflushfunctionwillflushtheentireRXFIFOiftheCRCcheckfails.AfterautoflushingtheRXFIFO,thenextstatedependsontheMCSM1.RXOFF_MODEsetting.PKTCTRL0.CC2400_ENmustbe0(default)fortheCRCautoflushfunctiontoworkcorrectly.Whenusingtheautoflushfunction,themaximumpacketlengthis63bytesinvariablepacketlengthmodeand64bytesinfixedpacketlengthmode.NotethatthemaximumallowedpacketlengthisreducedbytwobyteswhenPKTCTRL1.APPEND_STATUSisenabled,tomakeroomintheRXFIFOforthetwostatusbytesappendedattheendofthepacket.SincetheentireRXFIFOisflushedwhentheCRCcheckfails,thepreviouslyreceivedpacketmustbereadoutoftheFIFObeforereceivingthecurrentpacket.TheMCUmustnotreadfromthecurrentpacketuntiltheCRChasbeencheckedasOK.15.4CRCCheckCC2500supportsthreedifferenttypesofpacket-filtering:addressfiltering,maximumlengthfilteringandCRCfiltering.15.3.1AddressFilteringSettingPKTCTRL1.ADR_CHKtoanyothervaluethanzeroenablesthepacketaddressfilter.ThepackethandlerenginewillcomparethedestinationaddressbyteinthepacketwiththeprogrammednodeaddressintheADDRregisterandthe0x00broadcastaddresswhenPKTCTRL1.ADR_CHK=10borboth0x00and0xFFbroadcastaddresseswhenPKTCTRL1.ADR_CHK=11b.Ifthereceivedaddressmatchesavalidaddress,thepacketisreceivedandwrittenintotheRXFIFO.Iftheaddressmatchfails,thepacketisdiscardedandreceivemoderestarted(regardlessoftheMCSM1.RXOFF_MODEsetting).Ifthereceivedaddressmatchesavalidaddresswhenusinginfinitepacketlengthmodeandaddressfilteringisenabled,0xFFwillbewrittenintotheRXFIFOfollowedbytheaddressbyteandthenthepayloaddata.15.3.2MaximumLengthFilteringInvariablepacketlengthmode,PKTCTRL0.LENGTH_CONFIG=1,thePKTLEN.PACKET_LENGTHregistervalueisusedtosetthemaximumallowedpacketlength.Ifthereceivedlengthbytehasalargervaluethanthis,thepacketisdiscardedandSWRS040CTherearetwodifferentCRCimplementations.PKTCTRL0.CC2400_ENselectsbetweenthe2options.TheCRCcheckisdifferentforthe2Page31of89CC2500options.ReferalsototheCC2500ErrataNotes[1].15.4.1PKTCTRL0.CC2400_EN=0IfPKTCTRL0.CC2400_EN=0itispossibletoreadbacktheCRCstatusin2differentways:1)SetPKTCTRL1.APPEND_STATUS=1andreadtheCRC_OKflagintheMSBofthesecondbyteappendedtotheRXFIFOafterthepacketdata.Thisrequiresdoublebufferingofthepacket,i.e.theentirepacketcontentoftheRXFIFOmustbecompletelyreadoutbeforeitispossibletocheckwhethertheCRCindicationisOKornot.2)ToavoidreadingtheentireRXFIFO,anothersolutionistousethePKTCTRL1.CRC_AUTOFLUSHfeature.Ifthisfeatureisenabled,theentireRXFIFOwillbeflushediftheCRCcheckfails.IfGDOx_CFG=0x06theGDOxpinwillbeassertedwhenasyncwordisfound.TheGDOxpinwillbede-assertedattheendofthepacket.WhenthelatteroccurstheMCUshouldreadthenumberofbytesintheRXFIFOfromtheRXBYTES.NUM_RXBYTESstatusregister.IfRXBYTES.NUM_RXBYTES=0theCRCcheckfailedandtheFIFOisflushed.IfRXBYTES.NUM_RXBYTES>0theCRCcheckwasOKanddatacanbereadoutoftheFIFO.15.4.2PKTCTRL0.CC2400_EN=1IfPKTCTRL0.CC2400_EN=1theCRCcanbecheckedasoutlinedin1)inSection15.4.1aswellasbyreadingtheCRC_OKflagavailableinthePKTSTATUS[7]register,intheLQI[7]statusregisterorfromoneoftheGDOpinsifGDOx_CFGis0x07or0x15.ThePKTCTRL1.CRC_AUTOFLUSHordatawhiteningcannotbeusedwhenPKTCTRL0.CC2400_EN=1.15.5PacketHandlinginTransmitModeThemodulatorwillfirstsendtheprogrammednumberofpreamblebytes.IfdataisavailableintheTXFIFO,themodulatorwillsendthetwo-byte(optionally4-byte)syncwordandthenthepayloadintheTXFIFO.IfCRCisenabled,thechecksumiscalculatedoverallthedatapulledfromtheTXFIFOandtheresultissentastwoextrabytesfollowingthepayloaddata.IftheTXFIFOrunsemptybeforethecompletepackethasbeentransmitted,theradiowillenterTXFIFO_UNDERFLOWstate.TheonlywaytoexitthisstateisbyissuinganSFTXstrobe.WritingtotheTXFIFOafterithasunderflowedwillnotrestartTXmode.Ifwhiteningisenabled,everythingfollowingthesyncwordswillbewhitened.ThisisdonebeforetheoptionalFEC/Interleaverstage.WhiteningisenabledbysettingPKTCTRL0.WHITE_DATA=1.IfFEC/Interleavingisenabled,everythingfollowingthesyncwordswillbescrambledbytheinterleaverandFECencodedbeforebeingmodulated.FECisenabledbysettingMDMCFG1.FEC_EN=1.15.6PacketHandlinginReceiveModeInreceivemode,thedemodulatorandpackethandlerwillsearchforavalidpreambleandthesyncword.Whenfound,thedemodulatorhasobtainedbothbitandbytesynchronismandwillreceivethefirstpayloadbyte.IfFEC/Interleavingisenabled,theFECdecoderwillstarttodecodethefirstpayloadbyte.Theinterleaverwillde-scramblethebitsbeforeanyotherprocessingisdonetothedata.Ifwhiteningisenabled,thedatawillbede-whitenedatthisstage.Whenvariablepacketlengthmodeisenabled,thefirstbyteisthelengthbyte.Thepackethandlerstoresthisvalueasthepacketlengthandreceivesthenumberofbytesindicatedbythelengthbyte.Iffixedpacketlengthmodeisused,thepackethandlerwillaccepttheprogrammednumberofbytes.Next,thepackethandleroptionallycheckstheaddressandonlycontinuesthereceptioniftheaddressmatches.IfautomaticCRCcheckisenabled,thepackethandlercomputesCRCandmatchesitwiththeappendedCRCchecksum.Attheendofthepayload,thepackethandlerwilloptionallywritetwoextrapacketstatusPage32of89ThepayloadthatistobetransmittedmustbewrittenintotheTXFIFO.Thefirstbytewrittenmustbethelengthbytewhenvariablepacketlengthisenabled.Thelengthbytehasavalueequaltothepayloadofthepacket(includingtheoptionaladdressbyte).Ifaddressrecognitionisenabledonthereceiver,thesecondbytewrittentotheTXFIFOmustbetheaddressbyte.Iffixedpacketlengthisenabled,thenthefirstbytewrittentotheTXFIFOshouldbetheaddress(ifthereceiverusesaddressrecognition).SWRS040CCC2500bytesthatcontainCRCstatus,linkqualityindicationandRSSIvalue.15.7PacketHandlinginFirmwareinformationonhowmanybytesareintheRXFIFOandTXFIFOrespectively.SeeTable33.b)SPIpollingWhenimplementingapacketorientedradioprotocolinfirmware,theMCUneedstoknowwhenapackethasbeenreceived/transmitted.Additionally,forpacketslongerthan64bytestheRXFIFOneedstobereadwhileinRXandtheTXFIFOneedstoberefilledwhileinTX.ThismeansthattheMCUneedstoknowthenumberofbytesthatcanbereadfromorwrittentotheRXFIFOandTXFIFOrespectively.Therearetwopossiblesolutionstogetthenecessarystatusinformation:a)InterruptdrivensolutionInbothRXandTXonecanuseoneoftheGDOpinstogiveaninterruptwhenasyncwordhasbeenreceived/transmittedand/orwhenacompletepackethasbeenreceived/transmitted(IOCFGx=0x06).Inaddition,therearetwoconfigurationsfortheIOCFGxregisterthatareassociatedwiththeRXFIFO(IOCFGx=0x00andIOCFGx=0x01)andtwothatareassociatedwiththeTXFIFO(IOCFGx=0x02andIOCFG=0x03)thatcanbeusedasinterruptsourcestoprovideThePKTSTATUSregistercanbepolledatagivenratetogetinformationaboutthecurrentGDO2andGDO0valuesrespectively.TheRXBYTESandTXBYTESregisterscanbepolledatagivenratetogetinformationaboutthenumberofbytesintheRXFIFOandTXFIFOrespectively.Alternatively,thenumberofbytesintheRXFIFOandTXFIFOcanbereadfromthechipstatusbytereturnedontheMISOlineeachtimeaheaderbyte,databyte,orcommandstrobeissentontheSPIbus.ItisrecommendedtoemployaninterruptdrivensolutionashighrateSPIpollingwillreducetheRXsensitivity.Furthermore,asexplainedinSection10.3andtheCC2500ErrataNotes[1],whenusingSPIpollingthereisasmall,butfinite,probabilitythatasinglereadfromregistersPKTSTATUS,RXBYTESandTXBYTESisbeingcorrupt.Thesameisthecasewhenreadingthechipstatusbyte.RefertotheTIwebsiteforSWexamples([6]and[7]).16ModulationFormatsCC2500supportsamplitude,frequencyandphaseshiftmodulationformats.ThedesiredmodulationformatissetintheMDMCFG2.MOD_FORMATregister.Optionally,thedatastreamcanbeManchestercodedbythemodulatoranddecodedbythedemodulator.ThisoptionisenabledbysettingMDMCFG2.MANCHESTER_EN=1.ManchesterencodingisnotsupportedatthesametimeasusingtheFEC/Interleaveroption.16.1FrequencyShiftKeying16.2MinimumShiftKeying1fdev?fxosc?(8?DEVIATION_M)?2DEVIATION_E172ThesymbolencodingisshowninTable23.Format2-FSK/GFSKSymbol‘0’‘1’CodingCDeviation+DeviationTable23:SymbolEncodingfor2-FSK/GFSKModulation2-FSKcanoptionallybeshapedbyaGaussianfilterwithBT=1,producingaGFSKmodulatedsignal.ThefrequencydeviationisprogrammedwiththeDEVIATION_MandDEVIATION_EvaluesintheDEVIATNregister.Thevaluehasanexponent/mantissaform,andtheresultantdeviationisgivenby:WhenusingMSK,thecompletetransmission(preamble,syncwordandpayload)willbeMSKmodulated.Phaseshiftsareperformedwithaconstanttransitiontime.1IdenticaltooffsetQPSKwithhalf-sineshaping(datacodingmaydiffer)Page33of89SWRS040CCC2500ThefractionofasymbolperiodusedtochangethephasecanbemodifiedwiththeDEVIATN.DEVIATION_Msetting.Thisisequivalenttochangingtheshapingofthesymbol.TheMSKmodulationformatimplementedinCC2500invertsthesyncwordanddatacomparedtoe.g.signalgenerators.16.3AmplitudeModulationThesupportedamplitudemodulationOn-OffKeying(OOK)simplyturnsonoroffthePAtomodulate1and0respectively.17ReceivedSignalQualifiersandLinkQualityInformationCC2500hasseveralqualifiersthatcanbeusedtoincreasethelikelihoodthatavalidsyncwordisdetected.17.1SyncWordQualifierThepreamblequalityestimatorincreasesaninternalcounterbyoneeachtimeabitisreceivedthatisdifferentfromthepreviousbit,anddecreasesthecounterby8eachtimeabitisreceivedthatisthesameasthelastbit.ThethresholdisconfiguredwiththeregisterfieldPKTCTRL1.PQT.Athresholdof4?PQTforthiscounterisusedtogatesyncworddetection.Bysettingthevaluetozero,thepreamblequalityqualifierofthesyncwordisdisabled.A“PreambleQualityReached”signalcanbeobservedononeoftheGDOpinsbysettingIOCFGx.GDOx_CFG=8.ItisalsopossibletodetermineifpreamblequalityisreachedbycheckingthePQT_REACHEDbitinthePKTSTATUSregister.Thissignal/bitassertswhenthereceivedsignalexceedsthePQT.17.3RSSIIfsyncworddetectioninRXisenabledinregisterMDMCFG2theCC2500willnotstartfillingtheRXFIFOandperformthepacketfilteringdescribedinSection15.3beforeavalidsyncwordhasbeendetected.ThesyncwordqualifiermodeissetbyMDMCFG2.SYNC_MODEandissummarizedinTable24.CarriersenseinTable24isdescribedinSection17.4.MDMCFG2.SYNC_MODESyncWordQualifierModeNopreamble/sync15/16syncwordbitsdetected16/16syncwordbitsdetected30/32syncwordbitsdetectedNopreamble/sync,carriersenseabovethreshold15/16+carriersenseabovethreshold16/16+carriersenseabovethreshold30/32+carriersenseabovethresholdTheRSSIvalueisanestimateofthesignallevelinthechosenchannel.ThisvalueisbasedonthecurrentgainsettingintheRXchainandthemeasuredsignallevelinthechannel.InRXmode,theRSSIvaluecanbereadcontinuouslyfromtheRSSIstatusregisteruntilthedemodulatordetectsasyncword(whensyncworddetectionisenabled).AtthatpointtheRSSIreadoutvalueisfrozenuntilthenexttimethechipenterstheRXstate.TheRSSIvalueisindBmwith?dBresolution.TheRSSIupdaterate,fRSSI,dependsonthereceiverfilterbandwidth(BWchanneldefinedinSection13)andAGCCTRL0.FILTER_LENGTH.Table24:SyncWordQualifierMode17.2PreambleQualityThreshold(PQT)ThePreambleQualityThreshold(PQT)sync-wordqualifieraddstherequirementthatthereceivedsyncwordmustbeprecededwithapreamblewithaqualityaboveaprogrammedthreshold.AnotheruseofthepreamblequalitythresholdisasaqualifierfortheoptionalRXterminationtimer.SeeSection19.7onpage43fordetails.SWRS040CfRSSI?2?BWchannel8?2FILTER_LENGTHIfPKTCTRL1.APPEND_STATUSisenabledtheRSSIvalueatsyncworddetectionisPage34of89CC2500automaticallyaddedtothefirstbyteappendedafterthedatapayload.TheRSSIvaluereadfromtheRSSIstatusregisterisa2’scomplementnumber.ThefollowingprocedurecanbeusedtoconverttheRSSIreadingtoanabsolutepowerlevel(RSSI_dBm).1)ReadtheRSSIstatusregister2)Convertthereadingfromahexadecimalnumbertoadecimalnumber(RSSI_dec)3)IfRSSI_dec≥128thenRSSI_dBm=(RSSI_dec-256)/2CRSSI_offset4)ElseifRSSI_dec<128thenRSSI_dBm=(RSSI_dec)/2CRSSI_offsetTable25providestypicalvaluesfortheRSSI_offset.Figure13showstypicalplotsofRSSIreadingsasafunctionofinputpowerlevelfordifferentdatarates.DataRate[kBaud]2.RSSI_offset[dB]Table25:TypicalRSSI_offsetValues0,0-10,0-20,0-30,0RSSIreadout[dBm]-40,0-50,0-60,0-70,0-80,0-90,0-100,0-110,0-120,0-120-110-100-90-80-70-60-50-40-30-20-100Inputpower[dBm]2.4kBaud10kBaud250kBaud250kBaud,reducedcurrent500kBaudFigure13:TypicalRSSIValuevs.InputPowerLevelforSomeTypicalDataRates17.4CarrierSense(CS)de-assertedwhenRSSIhasdecreasedwiththesamenumberofdB.Thissettingisnotdependentontheabsolutesignallevelandisthususefultodetectsignalsinenvironmentswithatimevaryingnoisefloor.CarrierSensecanbeusedasasyncwordqualifierthatrequiresthesignalleveltobehigherthanthethresholdforasyncwordsearchtobeperformed.ThesignalcanalsobeobservedononeoftheGDOpinsbysettingPage35of89TheCarrierSense(CS)flagisusedasasyncwordqualifierandforCCA.TheCSflagcanbesetbasedontwoconditions,whichcanbeindividuallyadjusted:?CSisassertedwhentheRSSIisaboveaprogrammableabsolutethreshold,andde-assertedwhenRSSIisbelowthesamethreshold(withhysteresis).CSisassertedwhentheRSSIhasincreasedwithaprogrammablenumberofdBfromoneRSSIsampletothenext,andSWRS040C?三亿文库包含各类专业文献、应用写作文书、高等教育、专业论文、各类资格考试、72cc2500等内容。　
　2、CC2500 履带吊 2.1 空载行走对地面坡度的要求(见操作手册第六章 059-/ P17)第 3 页共 9 页 臂杆在吊车的轴向角度 臂杆长度 主臂长度≤72m... 　1-CC2500履带吊组立及负荷试验_机械/仪表_工程科技_专业资料。CC2500履带吊组立及负荷试验文件编码:GC10Z-301-2008 文件名称:燕山湖 CC2500 履带吊塔式超起工况... 　基于CCG无线收发系统设计正文(郝兴恒)_工学_高等教育_教育专区。CC2500的通信电子线路设计 数传系统基于CC2500 的 2.4GHz 无线收发系统设计 1.系统方案设... 　///CC2500.C/// #include &CC2500.h& pdata uint8 CC2500_TxRxBuf[1+CC2500_DATA_LEN ]; //CC2500_DATA_LEN=32;but 61 中是 64; pdata uint8 CC... 　1.3.2 无线模块接口部分 在本学习板上留有无线模块接口,兼容 CC1100、CC2420、CC2500 等型号的无线模。无线模块与 MSP430F5529 的 USCI 模块结合使用 ,以 ... 　1.8 《电力建设安全健康与环境管理工作规程》2002 版 1.8 CC2500-1 型履带吊工况表。 1.9 《起重机械安全规程》GB0。 1.10 《起重设备安装工程施工... 　主要机械、工器具及安全防护设施: 9.1 主要施工机械: CCt 履带吊 50t 汽车吊 9.2 主要工器具及材料: 序号 1 2 3 4 5 6 7 8 9 10 12 13 ... 　the system supporting low cost operation,easily realization and very low power consumption. Key Words: MSP430F2274 ZIGBEE CC2500 2 目录 1 2 引言 ... ...& 57 Results
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ensearchweb14被浏览3268分享邀请回答1添加评论分享收藏感谢收起/What-does-X-stand-for-in-TX-and-RX---- 搬运工的分割线 ----It's doesn't stand for anything. The X is used to pad out acronyms to make them more acceptable.Los Angeles International Airport uses the code LAXIn theatre, anything lighting related gets called LX (e.g. PVC electrical tape gets called LX tape).Ethernet at Gigabit speeds, using single mode fibre uses the 1000Base-LX standard (the "L" stands for Long Reach)For some reason humans don't seem to like single letter acronyms, so we pad them out to two letters.There are some X acronyms, where the X does mean something: FX (special eFeCTs), MX (Mailbox Exchange), RX (RallyCross), etc代表个毛线。X 就是个让它们好读好写好（接）受一点的添头。落衫姬国际机场使用代码 LAX在剧院，「灯……等灯等灯」也叫 LX（例：PVC 电工胶带也叫 LX 胶带）吉蛤比特以太网的单膜光纤，使用 1000Base-LX 标准（此处 L 代表「长距」）阿拉说：如果一个字母不能让人欢愉，那就再来一个（还有一些 X 缩写，则有明确含义，FX、MX、RX（我已懒得查字典）92 条评论分享收藏感谢收起}