目录
1 概述.....................................................................................................................................1
1.1 设计目的和意义..........................................................................................................................1
1.2 设计任务与要求..........................................................................................................................1
2 硬件电路设计及其描述....................................................................................................1
2.1 设计方案......................................................................................................................................1
2.2 原理框图………………………………………………………………………………………..2
2.3 基于 AT89C51 电容测量系统硬件设计详细分析....................................................................2
2.3.1 AT89C51 单片机工作电路...............................................................................................2
2.3.2 基于 AT89C51 电容测量系统复位电路.........................................................................3
2.3.3 基于 AT89C51 电容测量系统时钟电路.........................................................................4
2.3.4 基于 AT89C51 电容测量系统按键电路.........................................................................4
2.3.5 基于 AT89C51 电容测量系统 555 芯片电路.................................................................5
2.3.6 基于 AT89C51 电容测量系统显示电路.........................................................................6
2.4 各部分电路连接成整个电路图..................................................................................................9
2.5 系统所用元器件......................................................................................................................10
2.6 PCB 制图……………………………………………………………………………………..11
3 软件流程及程序设计......................................................................................................11
3.1 系统模块层次结构图................................................................................................................11
3.2 程序设计算法设计....................................................................................................................12
3.3 软件设计流程............................................................................................................................13
3.4 源程序代码……………………………………………………………………………………13
4 系统调试及仿真..............................................................................................................17
5 总结..................................................................................................................................18
5.1 本系统存在的问题及改进措施................................................................................................18
5.2 心得体会....................................................................................................................................18
参考文献..............................................................................................................................19
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