文档介绍：目录
1 绪论................................................................................................1
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2总体设计方案........................................................... ................3
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AT89C51的主要性能.................................................4
AT89C51的引脚结构.................................................5
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菲涅尔透镜..................................................................10
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3 系统硬件设计.......................................................................….13
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4 系统软件....................................................................................19
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