视频监控系统硬件设计

存档日期：_____________________存档编号：______________________徐州师范大学本科生毕业论文（设计）论文题目:视频监控系统硬件设计姓名:孙静院系：电气工程及自动化学院专业：自动化班级：07电51指导老师：李旭超徐州师范大学教务处印刷I摘要随着社会发展，科技进步,人们的生活水平显著提高，并对工作生活环境中安全防范方面的意识及需求也显著增加！由此，信息处理技术特别是视频信息处理技术得到了飞速的发展，这时的视频处理技术成为研究的热点，并已广泛应用于视频会议，安全防范等多媒体信息生活方面！多媒体信息的处理与传统信息的处理相比最大的不同在于多媒体信息处理特别是视频信息需要处理的信息量极大，所以要求处理设备的数据吞吐量极大，而且处理速度要极快！以往国内使用的视频监控系统大多数是基于模拟技术，20世纪90年代末，网络带宽、计算机处理能力和存储容量的迅速提高，再加上数字多媒体在压缩和通信算法领域取得的显著进步，这就促使视频监控系统从模拟技术时代进入数字化网络时代，即数字视频监控系统。目前，大多数的数字视频监控系统是基于PC机的图像采集卡进行视频图像采集，但存在以下的一些缺点，如系统稳定性差，携带不方便,成本高，而且在恶劣环境下性能较差等。为了克服这些缺点,在研究人员的深入研究下，利用迅猛发展的超大规模集成电路和嵌入式集成电路，TI公司的DSP，Motorola公司的PowerPC等功能强大的嵌入式处理器被研发出来，投入市场，且价格越来越低，丰富的外设接口和高度的可编程性使得视频监控的硬件和软件都更容易实现，不仅如此，将这种嵌入式处理器应用到视频监控系统中还克服了上述基于PC机系统的诸多缺点。正是由于越来越高的性价比加上体积小、成本低等独特优势使得嵌入式芯片在视频监控领域也渐渐占有了一席之地。本论文主要研究并设计了一个嵌入式视频监控系统，它的主控芯片采用了TI公司推出的专用多媒体处理芯片TMS320DM642。本文先通过最小系统设计，其中包括DSP,电源电路，复位电路等几部分，然后对外围设备进行扩展，包括视频电路，音频电路，本地存储电路，以太网传输电路，UART传输电路，最后讨论了TMS320DM642处理器通常采用的CCS软件开发平台。关键词：TMS320DM642DSP视频监控IIAbstractWiththesocialdevelopment,scientificandtechnologicalprogress,people'slivingstandardshavemarkedlyimproved,andworkingandlivingenvironment,securityawarenessandasignificantincreaseindemand!Asaresult,informationprocessingtechnology,especiallyvideoinformationprocessingtechnologyhasbeenrapiddevelopment,whenthevideoprocessingtechnologyastheresearchfocus,andhasbeenwidelyusedinvideoconferencing,securityandothermultimedialife!Multimediainformationprocessing,comparedwiththetraditionalinformationprocessingisthelargestmultimediainformationprocessingofdifferentvideoinformationneedtobeaddressedinparticulartheenormousamountofinformation,sothedatathroughputrequiredagreatdealofequipment,andprocessingspeedtobefast!Thepast,videosurveillancesystemsfordomesticusearemostlybasedonanalogtechnology,the20thcentury,late90s,networkbandwidth,computerprocessingpowerandstoragecapacityoftherapidincrease,combinedwithdigitalmultimediaandcommunicationsalgorithmsinthefieldofcompressionachievedremarkableprogress,whichtomakevideosurveillancesystemfromanalogtechnologyintothedigitaleraoftheInternetage,thedigitalvideosurveillancesystem.Currently,mostofthedigitalvideosurveillancesystemisPC-basedimagecapturecardforvideoimagecapture,buttherearesomeshortcomingsbelow,suchaspoorstabilityofthesystem,carryconvenient,highcostandpoorperformanceinharshenvironmentssuchas.Toovercometheseshortcomings,theresearchersin-depthstudy,usingthedifferencebetweentherapiddevelopmentoflargescaleintegratedcircuitsandembeddedintegratedcircuits,TI'sDSP,Motorola'sPowerPCembeddedprocessorssuchasthepowerfulhavebeendeveloped,putmarket,andpricesgettinglowerandlower,richandhighlyprogrammableperipheralinterfacemakesvideosurveillancehardwareandsoftwareareeasiertoachieve,notonlythat,thiskindofIIIembeddedprocessorsappliedtothevideosurveillancesystemalsoovercomePC-basedsystem,thesemanyshortcomings.Itiscoupledwiththeincreasinglyhighcost,smallsize,lowcost,makesembeddedchipsuniqueadvantagesinvideosurveillancehasgraduallyoccupiedaspace.Inthisthesis,andtodesignanembeddedvideomonitoringsystem,whichusesthemaincontrolchip,TIhasintroducedadedicatedmediaprocessingchipTMS32ODM642.Thisarticlefirstbyminimizingthesystemdesign,includingDSP,powersupplycircuit,resetcircuit,resetcircuitandotherparts,andthenbeextendedtoperipheraldevices,includingthevideocircuitry,audiocircuitry,localstoragecircuit,Ethernettransmissioncircuits,UARTtransmissioncircuitsFinally,thediscussioninthedesignofhigh-speedPCBandthemoduleneededtopayattentiontoamixtureofsomeoftheproblemsandanalyzestheworkofalltheexpansioninterfacecircuittiming.Keywords:TMS320DM642DSPVideoSurveillanceSystemIV目录摘要..............................................IABSTRACT..........................................II1绪论........................................................11.1研究视频监控系统的背景及意义............................11.2研究视频监控系统的现状及发展............................21.3本论文的工作内容及结构安排..............................32方案的确定与系统介绍...............................52.1方案的选择与确定........................................52.2TMS320DM642的介绍....................................52.3系统结构...............................................103最小系统设计.............................................133.1电源模块..............................................133.2系统时钟电路..........................................143.3JTAG接口电路..........................................153.4内存扩展接口EMIF.....................................163.5系统配置...............................................234外围电路设计.............................................254.1I2C总线...............................................254.2视频采集模块..........................................274.3视频播放电路..........................................314.4PCI/HPI/EMAC模块.....................................34V5集成开发环境CCS.........................................365.1软件环境介绍..........................................365.2实时操作系统DSP/BOIS.................................365.3软硬件调试的系统实现..................................385.4驱动程序..............................................386结论和展望...........................................