基于单片机STC11F32的LED点阵书写显示屏的设计

201110225ZHAOMINGGONGCHENGXUEBAOOct．2011Vol.22No.5STC11F32LED223003STC11F3232×32LED。“、、、、、、”。STC11F32LEDDesignofLEDLatticWritingDisplayScreenBasedonChipMicrocomputerSTC11F32WangHaiyanGaoZhishengXuJianghaiHuaianCollegeofInformationTechnologyJiangsuHuaian223003AbstractThissystemfoundedonSTC11F32designedandproduceda32×32latticeLEDwritingdisplays．ItcanrealizetwoworkmodesofscanningWeiLianganddisplaywiththelightpenby“lightscratchedreversecompletederasestrokeeraseobjectdrag”andsoon．Thisscreenalsoshowsthecoordinate．Itcanadjustthescreenbrightnessautomaticallyaccordingtothechangeoftheenvironmentlight．Besidesthesystemhasthesleepmode．KeywordsSTC11F32LEDDot-Matrixlightpen1LED“”、。LED“”32×32LED1。STC11F321LED“、、、、、、”。10020111022.1。、、。。。。2.2。74HC15474HC1544～16。2.3、。51。51、。ARMFPGA。、。STC。515112RAM1280B。STC11F32RAM1280B32KB。33.1223.213。U1B、R2、R3I=Vcc/R2=5/1000=5mASR3SU1BSR3U1BU1BU1CU1CR4U1B。。3232×32LED32×32LED274HC1545—32。、274HC15442.5V、5V。1024514。LED2.5－1.8/225STC11F32LED1014551=13.7mALED5－1.8/51=62.7mA36。/CS、/WR、DATA。4LM3589012LED9012LED。55。2K5V。44.1“”、“”6a。4。4.20036b。4.311102201110。64.40101001S。5。74HC15432×32。、、、、、、、、。。1．2009EB/OL．http∥．nuedc．com．cn/2009．2．M．2005．3．LEDM．2000209～210．9411W．J．SmithE．BetenskyandD．Williamsonetal．“ThePastPresentandFutureofOpticalDesign”．SPIE-OSA63422006．12B．A．JacobsonandR．D．Gengelbacb．“LensforUniformLEDIlluminationanExampleofAutomatedOptimizationUsingMonteCarloray-tracingofanLEDSource”．Proc．ofSPIE4446121～1282001．13．LED．201021346～4914DingYiGuPeifu．FreeformreflectorforuniformilluminationJ．ActaOpticaSinica2007273540～544．15．．J．2007273540～544．◆20118317.5。40、。300112、、LED。40。LED“、”。LED、、、、、、、50%～80%50%30000LED、、。。