【正文】 troller design and Clanguage programming microcontrollers,resources and all of its chip i/0 port functions and basic use of the the KEIL, PROTUES and the mon use of LCD displays and general use of the keyboard Keywords AT89C51 LCD control buttons 3 引言 當(dāng)今社會(huì)，隨著人們物質(zhì)生活的不斷提高，電子產(chǎn)品已經(jīng)走進(jìn)了家家戶(hù)戶(hù)，無(wú)論是生活或?qū)W習(xí)，還是娛樂(lè)和消遣，幾乎樣樣都離不開(kāi)電子產(chǎn)品，大型復(fù)雜的計(jì)算能力是人腦所不能勝任的，而且比較容易出錯(cuò)。 計(jì)算器在人們的日常生活中是比較常見(jiàn)的電子產(chǎn)品之一，基于這樣的理念，本次設(shè)計(jì)是用 AT89C52 單片機(jī)， LCD 顯示 器，控制按鍵為元件來(lái)設(shè)計(jì)的具備基本功能的簡(jiǎn)易計(jì)算器，利用此設(shè)計(jì)熟悉單片機(jī)微控制 器及 C 語(yǔ)言編程，對(duì)其片資源及各個(gè) I/O 端口的動(dòng)能和基本用途的了解，掌握 keil， protues 等開(kāi)發(fā)軟件，以及常用的 LCD 顯示器的使用方法和一般簡(jiǎn)單 的使用方法。 I 目 錄 摘 要 .......................................................................................................................................... 1 Abstract....................................................................................................................................... 2 引言 ............................................................................................................................................ 3 1 緒論 ........................................................................................................................................ 4 系統(tǒng)開(kāi)發(fā)的背景 ........................................................................................................... 4 系統(tǒng)的開(kāi)發(fā)意義 ........................................................................................................... 4 設(shè)計(jì)內(nèi)容和章節(jié) 分配 .................................................................................................. 4 2 系統(tǒng)方案設(shè)計(jì) ........................................................................................................................ 5 功能介紹 ...................................................................................................................... 5 基本功能 ............................................................................................................ 5 擴(kuò)展功能 ............................................................................................................. 5 方案論證與比較 .......................................................................................................... 5 控制部分的設(shè)計(jì)方案論證與選擇 .................................................................... 5 顯示電路的設(shè)計(jì)方案論證與選擇 ..................................................................... 6 鍵盤(pán)設(shè)計(jì)方案的選擇 ......................................................................................... 7 系統(tǒng)的組成 ................................................................................................................... 7 總體設(shè)計(jì)思想 ............................................................................................................... 8 3 主要芯片的介紹 ..................................................................................................................... 9 AT89C51 選擇及介紹 ................................................................................................... 9 開(kāi)發(fā)工具的介紹 ： .................................................................................................... 10 4 硬件電路設(shè)計(jì) ....................................................................................................................... 11 時(shí)鐘電路 .................................................................................................................... 11 顯示電路 ..................................................................................................................... 11 按鍵電路 .................................................................................................................... 12 5 軟件設(shè)計(jì) ............................................................................................................................... 13 LCD1602 ..................................................................................................................... 13 LCD1602 字符發(fā)生存儲(chǔ)器（ CGROM） ........................................................ 13 顯示數(shù)據(jù)寄存器（ DDRAM） ........................................................ 14 計(jì)算器軟件設(shè)計(jì) ........................................................................................................ 15 系統(tǒng)總流程圖 .................................................................................................. 16 II 算術(shù)運(yùn)算程序設(shè)計(jì) ........................................................................................... 16 數(shù)值的組成 ....................................................................................................... 18 LCD 的顯示方式 .............................................................................................. 19 仿真和調(diào)試 ................................................................................................................. 22 Keil 調(diào)試 .......................................................................................................... 22 protues 對(duì)于本設(shè)計(jì)的仿真 .............................................................................. 24 結(jié)論 .......................................................................................................................................... 25 致謝 .......................................................................................................................................... 26 參考文獻(xiàn) .................................................................................................................................. 27 附錄（源代碼） ....