论文题目:综合楼教室忙闲显示系统学生姓名:专业年级:电子信息科学与技术指导教师:职称讲师2008年6月3日I目录题目....................................................................................................I摘要.......................................................................................................................................I1前言..................................................................................................................................11.1题目的来源与开发意义................................................................................................11.2系统功能概述................................................................................................................12方案的提出及论证...........................................................................................................13系统硬件设计...................................................................................................................23.1系统硬件总体设计概述................................................................................................23.2系统各个模块的设计....................................................................................................33.2.1教室状态显示模块.....................................................................................................33.2.2时间显示模块.............................................................................................................33.2.3按键模块....................................................................................................................43.3芯片介绍.......................................................................................................................43.3.1AT89C51单片机的简介...........................................................................................43.3.2DS1302时钟.............................................................................................................93.3.38位串入/并出移位寄存器74HC164......................................................................134系统软件设计.................................................