基于DSP图像采集系统设计

辽宁科技大学本科生毕业设计（论文）第I页基于DSP图像采集系统设计摘要本设计的功能是实现实时图像采集，以数字处理芯片TMSC5410A为核心器件，以CMOS图像传感器OV7660来进行图像采集。本设计首先描述了系统的整体设计思路，然后分别对系统的硬件部分设计和软件部分设计进行了详细地说明。硬件设计包括电源模块、图像读入模块、DSP核心电路模块及DSP与PC机串行通信电路模块。在电源模块中，需要提供3.3V，5V和1.5V的电源为系统供电；在图像读入模块中，通过SCCB对OV7660完成有关设置，来实现模拟图像信号到数字图像信号的转变；在DSP核心板电路模块中，通过对时钟电路设计、复位电路设计、JTAG接口电路及其它电路的设计完成对DSP最小系统的设计和TMSC5410A存储器的扩展；在DSP与PC机串行通信电路模块中，通过UART提供的接口编程，来实现TMSC5410A与PC机的高速串行通信。软件设计包括系统的初始化、OV7660初始化和中断服务程序，这几部分分别可实现系统初始化，主要针对TMSC5410A的初始化，使DSP能够正常工作；OV7660初始化，启动图像采集功能；中断服务程序设计，实现数据的传送和接收。最终，系统完成了图像采集系统的硬件设计。关键字:图像采集;OV7660;TMSC5410A辽宁科技大学本科生毕业设计（论文）第II页HardwareDesignofImageCaptureSystembasedonDSPAbstractThefunctionofthisdesignistorealizereal-timeimageacquisitiontodigitalprocessingchipforthecoredevice,TMSC5410AOV7660byCMOSimagesensortoimageacquisition.Thisdesignfirstdescribedthesystem'soveralldesigntrainofthought,thenrespectivelytothesystemhardwaredesignandsoftwareofdesignindetail.Hardwaredesignincludingthepowermodules,imageintomodules,DSPcorecircuitmoduleandDSPandPCserialcommunicationcircuitmodule.Inthepowermodules,theneedtoprovide3.3V,5Vand1.5Vpowersupplysystems,powersupply;Intheimageintomodules,throughtoSCCBOV7660completerelevantSettings,tosimulatetheimagesignaltothedigitalimagesignalchange;InDSPcoreboardcircuitmodule,throughtotheclockcircuitdesign,resetcircuitdesign,JTAGinterfacecircuitandothercircuitdesigncompletedthedesignofDSPsmallestsystemTMSC5410Amemoryexpansion;andInDSPandPCserialcommunicationcircuitmodule,throughtheinterfaceprogramming,provideUARTTMSC5410AwithaPCtorealizethehigh-speedserialcommunication.Thesoftwaredesignincludingthesysteminitialization,OV7660initializationandinterruptserviceroutine,whichafewpartscanrealizesystemrespectivelyTMSC5410Ainitialization,mainlyintheinitialization,makeDSPcanworknormally;OV7660initialization,startimageacquisitionfunction;Theinterruptserviceroutinedesign,realizationdatatransmittingandreceiving.Finally,thesystemfinishedimageacquisitionsystemhardwaredesignKeywords:Imagecapture;OV7660;TMSC5410A辽宁科技大学本科生毕业设计（论文）第III页目录摘要.......................................................................................................................................IAbstract...................................................................................................................................II1.绪论.....................................................................................................................................11.1选题背景...................................................................................................................11.2设计方法和主要研究内容.........................................................................................22.总体设计..........................................................................................................................43.硬件设计说明................................................................................................................73.1电源模块设计.............................................................................................................73.2图像读入模块的设计.................................................................................................73.2.1图像传感器的选用..........................................................................................73.2.2图像传感器硬件的连接设计..........................................................................93.2.3图像传感器与DSP接口设计.......................................................................103.3DSP核心板电路模块设计........................................................................................133.3.1DSP的最小系统.............................................................................................133.3.2存储器扩展电路设计....................................................................................163.4DSP与PC机串行通信电路模块设计.....................................................................164.软件设计说明...............................................................................................................184.1程序总体框图...........................................................................................................184.2程序设计...................................................................................................................184.2.1系统初始化....................................................................................................184.2.2图像传感器OV7660初始化........................................................................224.2.3中断服务程序设计........................................................................................23总结.........................................................................................................................................33致谢.........................................................................................................................................34参考文献...............................................................................................................................35辽宁科技大学本科生毕业设计（论文）第IV页辽宁科技大学本科生毕业设计（论文）第1页1.绪论1.1选题背景人类获取外界信息的手段有视觉、听觉、触觉、嗅觉、味觉等多