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目 录
摘要 ....................................................................................................................................................I
ABSTRACT.....................................................................................................................................II
1 绪论..............................................................................................................................................1
1.1 课题的研究背景及意义........................................................................................................1
1.2 本课题研究的主要内容........................................................................................................2
2 设计任务及方案............................................................................................................................3
2.1 设计任务 ................................................................................................................................3
2.2 设计方案 ................................................................................................................................3
3 系统硬件设计..............................................................................................................................4
3.1 单片机最小硬件系统............................................................................................................4
3.1.1 主控芯片 AT89C52 单片机简介............................................................................4
3.1.2 复位电路 ...............................................................................................................9
3.1.3 时钟电路 .............................................................................................................10
3.2 键盘接口电路......................................................................................................................10
3.3 液晶显示电路......................................................................................................................11
4 系统软件设计..............................................................................................................................15
4.1 键盘扫描部分程序设计......................................................................................................15
4.2 运算部分程序设计..............................................................................................................15
4.3 显示部分程序设计..............................................................................................................16
4.4 主函数程序设计..................................................................................................................17
5 仿真和调试...................................................................................................................................19
5.1 KEIL 系统概述 ....................................................................................................................19
5.2 KEIL 使用步骤......................................................................................................................19
5.3PROTEUS 7.1 介绍 ..................................................................................................................20
5.4 PROTEUS 对于本设计的仿真步骤........................................................................................20
5.5 仿真结果 ..............................................................................................................................21
6 结论............................................................................................................................................22
参考文献..........................................................................................................................................23
附录 A: 源程序............................................................................................................................24
附录 B:系统总图...........................................................................................................................34
致 谢................................................................................................................................................35