目 录摘 要.....................................................1第一章 绪论............................................41.1 概述........................................................41.2 国内外发展现状.............................................41.2.1 国外发展现状.............................................41.2.2 国内发展现状.............................................4第二章 系统整体方案设计................................52.1 设计要求....................................................52.2 元器件选择.................................................5第三章 系统硬件设计....................................53.1 整体方案设计...............................................53.1.1 系统概述.................................................53.1.2 系统框图.................................................63.2 最小系统模块...............................................63.2.1 STC89C52 简介.............................................63.2.2 最小系统电路.............................................93.3 DHT11 传感器电路...........................................103.3.1 DHT11 传感器简介.........................................103.3.2 DHT11 接口说明...........................................113.3.3 DHT11 模块电路图.........................................123.4 液晶显示屏电路............................................143.4.1 1602 液晶显示屏简介......................................143.4.2 液晶显示屏引脚说明......................................143.4.3 指令介绍................................................153.4.4 液晶显示屏模块电路......................................193.5 蜂鸣器模块电路............................................193.6 按键输入模块电路..........................................203.7 继电器模块电路............................................20第四章 软件系统设计...................................214.1 单片机编程语言............................................214.2 程序流程图设计............................................2...
