能防止多次试探密码的单片机密码锁.doc

能防止多次试探密码的单片机密码锁


页数：17 字数：5389

目录
摘 要：------------------------------------------------------------------------------------------3
Abstract:-------------------------------------------------------------------------------------------3
1. 引言--------------------------------------------------------------------------------------------4
2. 硬件电路-----------------------------------------------------------------------------------------------------4
3. 软件设计-----------------------------------------------------------------------------------------------------6
3.1 存储单元的分配------------------------------------------------------------------------------------------6
3.2原程序-------------------------------------------------------------------------------------------------------7
4. 应用说明-----------------------------------------------------------------------------------------------------9
5. 存在的问题解决------------------------------------------------------------------------------------------10
5.1 硬件问题解决--------------------------------------------------------------------------------------------10
5.2 软件问题解决--------------------------------------------------------------------------------------------11
5.2.1 按键去抖动延时时间不够长------------------------------------------------------------------------11
5.2.2 输完密码后扬声器长鸣不止------------------------------------------------------------------------