ED广告屏的开发和设计目录摘要.....................................................................................................................................I1.绪论...........................................................................................................................11.1引言...................................................................................................................11.2LED显示屏的特点.........................................................................................11.3LED显示屏产品的优势...............................................................................21.4设计任务及要求............................................................................................32系统设计及其硬件电路设计.................................................................................42.1总体系统设计..................................................................................................42.1.1实现方法选取...........................................................................................42.3硬件电路设计................................................................................................62.3.1显示电路..................................................................................................62.3.2列驱动电路..............................................................................................72.3.3行驱动电路..............................................................................................82.3.4复位电路................................................................................................92.3.5晶振电路................................................................................................103.主要器件简介.........................................................................................................113.1STC11F32单片机简介.....................................................................113.274HC595简介......................................................................................153.374LS138简介........................................................................................173.44953芯片介绍...................................................................................194单片机串口通行介绍.............................................................................194.1STC11F系列单片机串行通信接口........................................................194.1.1串行口的结构与组成.............................................................................205软件和程序设计......................................................................................................245.1字模软件.....................................................................................................245.2程序流程图.....................................................................................................255.2软件各子模块设计...................................................................................265.2.1写入74HC595程序的设计......................................................................275.2.2列驱动程序的设计...................................................................................285.2.3行驱动程序设计....................................................................................29结论.............................
