基于CPLD的电子密码锁设计

Design of electron coded lock by CPLD

本文介绍了一种在MAX+PLUSⅡ环境下,采用复杂可编程逻辑器件(CPLD)的新型电子密码锁设计方法,阐述了其工作原理和软硬件设计方法。该密码锁通过扫描电路、键盘译码电路、弹跳消除电路、比较电路和七段译码电路等实现了密码输入、数码清除、密码激活、电锁解除、密码更改和误码报警等功能。本论文对该密码锁的程序进行了功能和时序仿真,结果表明该密码锁的功能满足设计要求,能够实现正常开锁、上锁和修改密码。该密码锁体积小、功耗低、易于维护和升级,有很好的市场前景。

This paper introduces a new way to design electron coded lock with CPLD and MAX＋ PLUSⅡ. Its operating principles and the designing methods of hardware and software are explained in this article. This coded lock can perform the following functions, such as code input, code clear, code activating, code releasing, code correcting and wrong code alarming by scanning circuit, keyboard decode circuit, bounce eliminating circuit, comparison circuit. The functional and timing simulations are made. The results show that the design specification of the electronic coded lock is met and the unlock/lock and code correcting can be realized. This new electron coded lock has small size, low power. Its maintenance and upgrade are very convenient. And it has a better application prospect.