基于stm32的ov5640图像wifi传输.ppt

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1、基于stm32f4的ov2640摄像头模块lcd图像传输Lcdimagedisplayofov2640cameramodulebasedonstm32f4STMicroelectronicsintroducedtheSTM32F4familyofhigh-performancemicrocontrollersbasedontheARM®Cortex™-M4coreusinga90-nmNVMprocessandART(AdaptiveReal-TimeMemoryAccelerator™).ARTtechnologymakestheprogr

2、amnowaitforexecution,improvetheefficiencyofprogramexecution,makingtheSTM32F4seriescanreach210DMIPS@168MHz.TheSTM32F4familyofmicrocontrollersintegratessingle-cycleDSPinstructionsandFPU(floatingpointunit)toimprovecomputationalpowerandallowforcomplexcalculationsandcontrols.Int

3、roductionofSTM32F4ThissectionappliestothewholeSTM32F4xxfamilydevices,unlessotherwisespecified.Thedigitalcameraisasynchronousparallelinterfaceabletoreceiveahigh-speeddataflowfromanexternal8-,10-,12-or14-bitCMOScameramodule.Itsupportsdifferentdataformats:YCbCr4:2:2/RGB565prog

4、ressivevideoandcompresseddata(JPEG).Thisinterfaceisforusewithblack&whitecameras,X24andX5cameras,anditisassumedthatallpre-processinglikeresizingisperformedinthecameramodule.IntroductionofDCMIofSTM32F4•8-,10-,12-or14-bitparallelinterface•Embedded/externallineandframesynchro

5、nization•Continuousorsnapshotmode•Cropfeature•Supportsthefollowingdataformats:–8/10/12/14-bitprogressivevideo:eithermonochromeorrawbayer–YCbCr4:2:2progressivevideo–RGB565progressivevideo–Compresseddata:JPEGDCMImainfeaturesDCMIpinsTableshowstheDCMIpinsNameSignaltypeD[0

6、:13]DatainputsHSYNCHorizontalsynchronizationinputVSYNCVerticalsynchronizationinputPIXCLKPixelclockinputTableDCMIpinsThedigitalcamerainterfaceusestwoclockdomainsPIXCLKandHCLK.ThesignalsgeneratedwithPIXCLKaresampledontherisingedgeofHCLKoncetheyarestable.Anenablesignalisgenera

7、tedintheHCLKdomain,toindicatethatdatacomingfromthecameraarestableandcanbesampled.TheminimumPIXCLKperiodmustbehigherthan2.5HCLKperiods.DCMIclocksDCMIfunctionaloverviewThedigitalcamerainterfaceisasynchronousparallelinterfacethatcanreceivehigh-speed(upto54Mbytes/s)dataflows.It

8、consistsofupto14datalines(D13-D0)andapixelclockline(PIXCLK).Thepixelclockhasaprog