【正文】 畢業(yè)設(shè)計(jì)論文 基于 FPGA 電子密碼鎖設(shè)計(jì) 摘 要 隨著電子技術(shù)的發(fā)展，具有防盜報(bào)警等功能的電子密碼鎖代替密碼量少、安全性差的機(jī)械式密碼鎖已是必然趨勢。電子密碼鎖與普通機(jī)械鎖相比，具有許多獨(dú)特的優(yōu)點(diǎn)：保密性好，防盜性強(qiáng)，可以不用鑰匙，記住密碼即可開鎖等。目前使用的電子密碼鎖大部分是基于單片機(jī)技術(shù)，以單片機(jī)為主要器件，其編碼器與解碼器的生成為軟件方式。在實(shí)際應(yīng)用中，由于程序容易跑飛，系統(tǒng)的可靠性能較差。 本文主要闡述了一種基于現(xiàn)場可編程門陣列 FPGA 器件的電子密碼鎖的設(shè)計(jì)方法。用 FPGA 器件構(gòu)造系統(tǒng)，所 有算法完全由硬件電路來實(shí)現(xiàn)，使得系統(tǒng)的工作可靠性大為提高。由于 FPGA 具有現(xiàn)場可編程功能，當(dāng)設(shè)計(jì)需要更改時(shí)，只需更改 FPGA中的控制和接口電路，利用 EDA 工具將更新后的設(shè)計(jì)下載到 FPGA 中即可，無需更改外部電路的設(shè)計(jì)，大大提高了設(shè)計(jì)的效率。因此，采用 FPGA 開發(fā)的數(shù)字系統(tǒng)，不僅具有很高的工作可靠性，而且升級(jí)也極其方便。 本文采用 EDA 技術(shù)，利用 Quartus II 工作平臺(tái)和硬件描述語言，設(shè)計(jì)了一種電子密碼鎖，并通過一片 FPGA 芯片實(shí)現(xiàn)。 關(guān)鍵詞： 電子密碼鎖； FPGA；硬件描述語言； EDA Abstract With the development of electronic technology, electronic password lock with burglar alarm and other functions replacing less password and poor security mechanical code lock is an inevitable trend. pared electronic password lock with ordinary mechanical locks, it has many unique advantages ： confidentiality, and security in nature, do not use the key, remember password can unlock it etc .Most electronic password locks we used now is based upon SCM technology ,SCM is its mainly device ,and the creating of encoding and decoding devices is the fashion of Software mode. In practical application, the reliability of the system may be worse because of easy running fly of the programme. This paper mainly expatiates a design method of electronic password lock based upon Field Programmable Gate Array device. We use FPGA devices to construct system , all of the algorithm entirely achieved by the hardware circuit , because of FPGA has the function of ISP , when the design needs to be changed We only need to change the control and interface circuit of FPGA,EDA tools are used to download the updated design to FPGA without changing the design of the external circuit , this greatly enhance the efficiency of the design .Therefore , we use FPGA to empolder the digital system has not only high reliability but also extremely convenient of upgrading and improvement .In this paper ,we use EDA technology , Quartus II platform and hardware description language designing an electronic password lock ,and it achieved through an FPGA chip. Key words： electronic password lock； FPGA； hardware description language； EDA I 目 錄 1 緒論 （標(biāo)題部分的格式很多不對(duì)，檢查修改） ......................................................... 1 本課題研究的國內(nèi)外現(xiàn)狀及其發(fā)展 .................................................................... 2 本課題研究的目的和意義 .................................................................................... 2 2 關(guān)鍵技術(shù)簡介 ................................................................................................................... 4 FPGA 硬件設(shè)計(jì)描述 .............................................................................................. 4 FPGA 的設(shè)計(jì)流程 .................................................................................... 4 VHDL 語言的基本結(jié)構(gòu) ........................................................................... 6 自上而下（ TOP DOWN）的設(shè)計(jì)方法 .................................................. 7 設(shè)計(jì)語言、仿真平臺(tái)與開發(fā)系統(tǒng) ........................................................................ 8 用 QuartusⅡ進(jìn)行系統(tǒng)開發(fā)的設(shè)計(jì)流程 ............................................................... 8 3 系統(tǒng)總體設(shè)計(jì) ................................................................................................................... 9 電子密碼鎖設(shè)計(jì)的原理 ........................................................................................ 9 方案的提出 .......................................................................................................... 10 系統(tǒng)設(shè)計(jì)要求 ...................................................................................................... 11 系統(tǒng)設(shè)計(jì)描述 ...................................................................................................... 11 各功能模塊描述 .................................................................................................. 12 系統(tǒng)流程 .............................................................................................................. 13 4 系統(tǒng)詳 細(xì)設(shè)計(jì) ................................................................................................................. 15 輸入模塊 .............................................................................................................. 15 時(shí)序產(chǎn)生電路 ......................................................................................... 16 按鍵消抖電路 ......................................................................................... 17 鍵盤掃描電路 ......................................................................................... 20 鍵盤譯碼電路 ......................................................................................... 21 鍵盤輸入模塊的實(shí)現(xiàn) ............................................................................. 22 電子密碼鎖控制模塊 .......................................................................................... 23 控制模塊的描述 ..................................................................................... 23 控制模塊的狀態(tài)圖與 ASM 圖 ................................. 錯(cuò)誤 !未定義書簽。 控制模塊的實(shí)現(xiàn) ..................................................................................... 27 電子密碼鎖顯示模塊 .......................................................................................... 28 II 數(shù)碼管顯示原理 ..................................................................................... 28 譯碼顯示的實(shí)現(xiàn) ..................................................................................... 31 5 系統(tǒng)仿真 ......................................................................................................................... 32 系統(tǒng)的有關(guān)編譯與仿真 ...................................................................................... 32 去抖模塊的仿真 .................................................................................................. 32 密碼鎖輸入電路的仿真 ..............................................................................