基于FPGA的密码锁的设计

DESIGN OF CIPHER LOCK BASED ON FPGA

针对传统的密码锁存在安全性低、稳定性差等问题,提出一种基于FPGA的密码锁的设计方法,以现场可编程逻辑器件为载体,并采用Verilog HDL硬件描述语言,实现密码锁的解锁、修改密码、报警提示和数码管显示功能。密码锁系统主要由按键输入模块、按键消抖模块、分频模块、密码检测模块、输出控制模块、译码显示模块组成。利用Quartus Ⅱ 13.0和Modelsim 10.4软件对各模块进行综合和仿真验证,结果证明,该方法具有安全可靠、运行稳定、操作简便等优点。

Aiming at the problems of low security and poor stability of traditional cipher lock, this paper proposes a design method of cipher lock based on FPGA. The field programmable logic device was used as the carrier and implemented by Verilog HDL hardware description language. The cipher lock has the functions of unlocking, modifying password, alarm prompt and digital tube display. The cipher lock system is mainly composed of a key input module, a button debounce module, a frequency division module, a cipher detection module, an output control module, and a decoding display module. Finally, the Quartus Ⅱ 13.0 and Modelsim 10.4 software were used to perform comprehensive and simulation verification of each module. The results show that the cipher lock based on FPGA design is safe, reliable, stable and flexible, and easy to operate.