【正文】 ntroduces the design of electronic password lock based on AVR microcontroller. Design of the main content for the design of hardware circuit and software program. The main function is to achieve humanmachine interface matrix input, the input mode is more economical in pin, digital tube display output (LCD1602). The save password with AVR microcontroller EEPROM, enter the correct password to unlock the lights, the LCD screen displays the unlock success. In the unlocking can be achieved after the password changes and storage, and reenter the password encrypted with MD5 after stored in encrypted form in EEPROM, more safe and reliable. This module is based on AVR MCU, the developing platform of the hardware of the module is based on Atmel39。ATmega16 MCU 沈陽理工大學(xué)學(xué)士學(xué)位論文III目 錄1 緒 論 .........................................................................................................................1 電子密碼鎖的介紹 ............................................................................................1 AVR 單片機(jī)的發(fā)展過程及現(xiàn)狀 ......................................................................2 發(fā)展過程 .................................................................................................2 AVR 單片機(jī)的現(xiàn)狀 ...............................................................................3 AVR 單片機(jī)的優(yōu)點(diǎn) ...............................................................................3 AVR 單片機(jī)的型號(hào)標(biāo)識(shí)解釋 ...............................................................5 AVR 8Bit MCU 的最大特點(diǎn) ................................................................5 MD5 加密算法的介紹 ......................................................................................6 MD5 的簡(jiǎn)介 ...........................................................................................6 MD5 算法的原理 ...................................................................................6 本論文的結(jié)構(gòu) ....................................................................................................82 系統(tǒng)整體設(shè)計(jì) ...............................................................................................................9 原理框圖 ............................................................................................................9 系統(tǒng)仿真平臺(tái) ....................................................................................................9 PROTUES 簡(jiǎn)介 ......................................................................................9 PROTUES 新特點(diǎn) ................................................................................10 軟件開發(fā)平臺(tái) ..................................................................................................13 WINAVR 與 AVR_Studio 的介紹 ......................................................13 AVR_Studio 的安裝 .............................................................................13 WINAVR 的安裝 .................................................................................153 仿真硬件電路設(shè)計(jì) .....................................................................................................17 硬件開發(fā)平臺(tái) ..................................................................................................17 ATmega16 介紹 ..................................................................................17 ATmega16 產(chǎn)品特征及性能 ..............................................................18 單片機(jī)外圍電路設(shè)計(jì) ......................................................................................23 液晶顯示屏的設(shè)計(jì) ...............................................................................23 矩陣鍵盤輸入的設(shè)計(jì) ...........................................................................25沈陽理工大學(xué)學(xué)士學(xué)位論文IV 外圍時(shí)鐘電路的設(shè)計(jì) ...........................................................................25 蜂鳴器及開鎖指示燈的設(shè)計(jì) ...............................................................26 單片機(jī)的引腳連接設(shè)計(jì) .......................................................................26 電源與時(shí)鐘電路的設(shè)計(jì) .......................................................................26 電路的完整設(shè)計(jì) ..............................................................................................264 軟件設(shè)計(jì) .....................................................................................................................27 單片機(jī) C 語言程序設(shè)計(jì)技術(shù) .........................................................................27 單片機(jī) C 語言的主要特點(diǎn) ..................................................................27 整體程序設(shè)計(jì)簡(jiǎn)要介紹 ..................................................................................28 整體程序的設(shè)計(jì) ...................................................................................28 各程序模塊的設(shè)計(jì) ..........................................................................................28 各函數(shù)定義 ...........................................................................................28 主函數(shù)模塊 ...........................................................................................33 LCD1602 液晶顯示屏模塊 ..................................................................38 矩陣鍵盤輸入模塊 ...............................................................................41 MD5 加密算法模塊 .............................................................................42 蜂鳴器子模塊 .......................................................................................48 讀取密碼及存儲(chǔ)密碼模塊 ...................................................................485 系統(tǒng)的實(shí)現(xiàn) .................................................................................................................51 系統(tǒng)運(yùn)行結(jié)果 ..................................................................................................51 程序的加載 ...........................................................................................51 功能的實(shí)現(xiàn) ...........................................................................................52結(jié) 論 ..............................................................................................................................