目 录
1. 引言 ..............................................................................................................................1
2. 关于单片机 ..................................................................................................................2
2.1 单片机的发展 .....................................................................................................2
2.2 单片机的开发背景 ............................................................................................4
2.2 单片机的开发背景 ............................................................................................5
2.3 AT89S52 单片机 .................................................................................................6
2.3.1 AT89S52 单片机引脚功能 .........................................................................7
2.3.2 AT89S52 单片机硬件结构的特点 .............................................................8
2.3.3 AT89S52 单片机的硬件原理 ..................................................................10
3. 方案设计与论证 ........................................................................................................12
4. 系统总体结构框图 ....................................................................................................13
5. 系统的硬件设计 ........................................................................................................14
5.1 显示部分电路的设计 ......................................................................................14
5.1.1 LED 数码显示管的基本原理 ..................................................................14
5.1.2 数码管显示模块分析 .............................................................................14
5.1.3 LED 显示电路 ...........................................................................................15
5.2 控制部分电路的设计 ......................................................................................15
5.2.1 时钟模块 .................................................................................................15
5.2.2 温度模块 .................................................................................................16
5.2.3 音乐模块 .................................................................................................16
5.2.4 复位模块 .................................................................................................16
5.2.5 光识模块 .................................................................................................17
6. 系统的软件设计 ........................................................................................................18
6.1 各模块的程序设计 ..........................................................................................18
6.1.1 计时程序 .................................................................................................18
6.1.2 定时闹钟程序 .........................................................................................18
6.1.3 温度程序 .................................................................................................18
6.2 系统程序设计的总体框图 ..............................................................................19
7. 系统电路的制作与调试 ............................................................................................20
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