目 录摘要 IABSTRACT..........................................................................................................................II第 1 章 绪论...........................................................................................................................11.1 课题的背景和意义........................................................................................................11.2 火灾报警器的发展历程................................................................................................11.3 ........................................................................................................................................2第 2 章 系统总体方案设计...................................................................................................32.1 设计要求........................................................................................................................32.2 方案选择和论证............................................................................................................32.2.132.2.2 显示方案的选择.......................................................................................................3第 3 章 系统硬件设计...........................................................................................................43.1 整体方案设计................................................................................................................43.1.1 系统框图...................................................................................................................43.2 最小系统模块................................................................................................................53.2.1 STC89C52 简介.........................................................................................................53.2.2 最小系统电路...........................................................................................................83.3 液晶显示电路.............
