目录1.前言 12.整体设计方案...................................................................................................................................................... 13.硬件设计方案...................................................................................................................................................... 23.1 复位电路 ...................................................................................................................................................... 23.2 晶振电路 ...................................................................................................................................................... 33.3 LED 显示电路 .............................................................................................................................................. 33.4 按键输入电路 .............................................................................................................................................. 43.5 蜂鸣器电路 .................................................................................................................................................. 44.软件设计方案...................................................................................................................................................... 54.1 软件设计方法 .............................................................................................................................................. 54.2 系统软件设计思想 ...................................................................................................................................... 64.3 系统主程序 .................................................................................................................................................. 64.4 中断子程序 ....................................................................................................................................................
