基于单片机广告牌的设计.docVIP免费

毕业论文论文题目系别电子信息工程系专业电子信息工程班级学号学生姓名指导教师（签名）完成时间年月IIII摘要随着社会经济的发展，广告已深入广大人民群众的生活，也为许多商家和公益团体所充分利用，LED点阵广告牌更是深得人们的喜爱。为了可以满足客户所要求的广告宣传，本设计设计了一个16*64的LED点阵广告牌，本广告牌可以实现汉字和图片的显示。本设计中以AT89S52单片机为主控芯片的16*64点阵LED广告牌，单片机通过读取字模并作相应的处理，然后以不同的显示方式显示到点阵显示屏上，实现广告牌内容显示形式的多样化。另外还得用八个74HC595驱动芯片和一个74HC154驱动芯片来驱动16个8*8点阵来实现文字和图片的显示，并能实现文字的左移、右移、上移和下移以及图像的放大和缩小。74HC154作为行驱动，选通行即该行导通，然后由74HC595送列的数据控制该行列的亮灭。通过软件可以编程更新广告牌的内容，满足不同时刻不同客户的广告需求。本广告牌可以为客户带来商业利益，为群众带来信息，还可以作为公益宣传广告为社会公益事业作出贡献。关键词：单片机；8*8点阵；LED点阵广告牌；级联·IITheDesignOfTaxiBillboardBasedOnSingleChipMicrocomputerAbstractWiththedevelopmentofsocialeconomy,advertisinghasbeendeepintothepeople'slife.Itismadefulluseofbymanybusinessesandnonprofitgroups.TheLEDlatticebillboardsareadoredbypeople.Inordertomeettheneedsofcustomerabouttheadvertising,thisdesignhasdesigneda16*64latticeLEDbillboards.ThebillboardscanrealizethedisplayofChinesecharactersandpictures.TheAT89S52singlechipmicrocomputerisasthemaincontrolchipinthedesignof16*64latticeLEDbillboard.Single-chipmicrocomputerreadsandfetchesmatrixandaccordinglyrespondtotreatment,thendisplayedinadifferentwayaccordingtothedotmatrixdisplayscreen,realizingtheformdiversificationofbillboardcontentdisplaying.Eight74hc595drivechipsanda74hc154drivechiparealsoneededinordertodrive168*8dotmatrixtorealizethedisplayingofwordsandimages.Meanwhilethetextcanshifttotheleft,right,upanddownaswellastheimageszoominandzoomout.The74hc154aslinedrive,passthebankconductionthroughsoftwareprogrammingcanupdatethecontentofthebillboard.Itcanmeetdifferentcustomersindifferenttime.Thebillboardscanbringmanybenefitsjustasfollows:bringingbusinessbenefitstocustomers,bringingtheinformationtopublicandmakingcontributiontopublicwelfareundertakingsforthesocietybybeingusedasapublicwelfareadvertisement.Keywords:singlechipmicrocomputer8*8latticeLEDlatticebillboardcascade目录第一章前言............................................................................................................11.1意义.......................................................................................................................11.2国内外发展趋势....................................................................................1第二章设计方案论证................................................................................22.1系统要求.........................................................................................................22.2主控芯片的选取方案论证........................................................22.3显示屏的显示方式论证...............................................................32.4电源的选取方案论证......................................................................32.5设计方案总结...........................................................................................3第三章系统硬件电路的设计...........................................................43.1硬件电路要求.....................................................