毕业设计-基于ARM的图像采集系统的设计

辽宁科技大学本科生毕业设计（论文）第I页基于基于基于基于ARMARMARMARM的图像采集系统的设计的图像采集系统的设计的图像采集系统的设计的图像采集系统的设计摘要近年来，随着人类科技的不断进步以及人们对安全、方便、快捷的优质生活的不断追求，图像采集已经越来越多地被应用到智能家居、图像识别、环境监控等领域。本文通过研究当前数字图像采集系统的研究成果和发展趋势，设计了一种基于嵌入式ARM的便携式数字图像采集系统,并对该系统设计过程中的若干问题进行了简单探讨，论文重点研究了系统的硬件设计和软件实现。本文所设计的嵌入式图像采集系统是采用以ARMCortex-M3为内核的STM32作为主控芯片，主控芯片先控制CMOS传感器OV7670进行图像采集，然后由主控芯片控制其将图像数据存放入FIFO存储器AL422B中，最后将采集的图像通过主控制器显示到触摸屏上，或者存储到SD卡内。该图像采集系统仅用一个ARM芯片就实现了对OV7670的功能控制、时序同步、数据采集与处理等功能，系统成本低，结构紧凑，功能强大。同时由于本设计采用低电压低功耗的传感器及处理器芯片，使整个系统的功耗很低，可以很容易将该系统移植到嵌入式移动设备上，具有一定的实用价值。关键词：嵌入式；图像采集；ARM；STM32；OV7670辽宁科技大学本科生毕业设计（论文）第II页BasedBasedBasedBasedononononARMARMARMARMofofofofimageimageimageimagecollectioncollectioncollectioncollectionsystemsystemsystemsystemdesigndesigndesigndesignAbstractInrecentyears,withtheprogressofscienceandtechnologyaswellashumanpeopletosafe,convenientandthepursuitofqualityoflife,imageacquisitionisincreasinglybeingappliedtointelligenthousehold,imagerecognition,environmentmonitor,etc.Thisarticlethroughstudiesthecurrentdigitalimageacquisitionsystemresearchanddevelopmenttrend,designakindofbasedonembeddedARMofportabledigitalimageacquisitionsystem,andthesystemsomeproblemsinthedesignprocessarealsodiscussed,thispaperlaysemphasisontheresearchofthesystemhardwaredesignandsoftwarerealization.InthispaperthedesignofembeddedimageacquisitionsystemisusedtoARMCortex-M3coreSTM32asthemasterchip,maincontrolchipcontrolOV7670CMOSsensorforfirstimagecollection,thenthemaincontrolchipwillcontroltheimagedatastorageintotheFIFOmemoryAL422B,finallytheimagethroughthemaincontrollercollectiontothetouchscreendisplay,ortostoreinSDcard.ThisimageacquisitionsystemwithjustoneARMchipswillachievethefunctionofOV7670control,timingsynchronization,dataacquisitionandprocessing,andotherfunctions,systemwithlowcost,compactstructure,thefunctionisstrong.Atthesametimebecausethedesignofthelowpowerconsumptionandlowvoltagesensorprocessorchips,thesystemofpowerconsumptionislow,thesystemcaneasilytransplantedintotheembeddedmobiledevices,hascertainpracticalvalue.Keyword:flushbonading;imagedataacquisition;ARM;STM32;systemdesign辽宁科技大学本科生毕业设计（论文）第III页目录摘要........................................................................................................................I1绪论.....................................................................................................................11.1研究便携式数字图像采集系统的意义......................................................................11.2设计背景及目的..........................................................................................................11.3设计主要工作及研究意义..........................................................................................22总体设计.............................................................................................................32.1功能需求......................................................................................................................32.2系统工作原理..............................................................................................................32.3系统软硬件规划..........................................................................................................42.3.1硬件规划...........................................................................................................42.3.2软件规划...........................................................................................................53硬件电路设计.....................................................................................................63.1开发环境介绍..............................................................................................................63.2主要芯片介绍..............................................................................................................73.2.1处理器...............................................................................................................73.2.2摄像头...............................................................................................................83.2.3显示面板...........................................................................................................83.2.4先进先出数据缓冲器（FIFO）.......................................................................93.2.5电阻式触摸屏感应芯片...................................................................................93.2.6电源芯片.........................................................................................................103.3原理图........................................................................................................................103.3.1电源电路.........................................................................................................103.3.2摄像头及数据缓冲电路.................................................................................103.3.3处理器电路......................................................................................................113.3.4触摸屏电路.....................................................................................................123.4PCB设计.......................................................