带温度显示的数字时钟设计.doc
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目 录
1 前言....................................................................................................................................1 2功能描述与总体方案….2
2.1功能描述.2
2.2系统组成....................................................................................................................2
3硬件设计.............................................................................................................................3
3.1时钟电路......................................................................................................................3
3.2复位电路......................................................................................................................3
3.3 DS1302时钟电路.......................................................................................................4
3.4 DS18B20温度计电路.................................................................................................4
3.5 按键电路....................................................................................................................5
3.6 显示电路.....................................................................................................................6
3.7 闹铃模块电路.............................................................................................................7
4软件设计.............................................................................................................................8
4.1 主函数流程图............................................................................................................8
4.2 18B20温度计流程图.................................................................................................9
4.3 按键电路流程图.......................................................................................................10
5结语....................................................................................................................................11
6参考文献............................................................
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