目 录摘 要.....................................................1第一章 绪论............................................31.1 概述........................................................31.2 国内外发展现状.............................................31.2.1 国外发展现状.............................................31.2.2 国内发展现状.............................................3第二章 系统整体方案设计................................42.1 设计要求....................................................42.2 元器件选择.................................................4第三章 系统硬件设计....................................43.1 整体方案设计...............................................43.1.1 系统概述.................................................53.1.2 系统框图.................................................53.2 最小系统模块...............................................53.2.1 STC89C52 简介.............................................53.2.2 最小系统电路.............................................83.3 DHT11 传感器电路............................................93.3.1 DHT11 传感器简介..........................................93.3.2 DHT11 接口说明...........................................103.3.3 DHT11 模块电路图.........................................123.4 液晶显示屏电路............................................133.4.1 1602 液晶显示屏简介......................................133.4.2 液晶显示屏引脚说明......................................133.4.3 指令介绍................................................143.4.4 液晶显示屏模块电路......................................173.5 蜂鸣器模块电路............................................183.6 按键输入模块电路..........................................193.7 继电器模块电路............................................19第四章 软件系统设计...................................204.1 单片机编程语言............................................204.2 程序流程图设计............................................2...
