目 录
1 概述..............................................................4
1.1 研究背景....................................................4
1.2 设计思想及基本功能..........................................4
2 总体方案设计......................................................4
2.1 方案选取....................................................4
2.2 系统框图....................................................6
2.3 总体方案设计................................................6
3 硬件电路设计......................................................7
3.1 电源电路设计................................................7
3.2 晶振电路....................................................8
3.3 复位电路....................................................9
3.4 键盘电路....................................................9
3.5 显示电路...................................................10
4 系统软件设计.....................................................13
4.1 主程序软件设计.............................................13
4.2 键盘程序设计...............................................14
5 系统调试.........................................................16
6 总结.............................................................19
参考文献...........................................................20
附录 1 系统原理图 ..................................................21
附录 2 系统程序 ....................................................22
