【正文】 ................................................................................................... 4 AT89C51 的引腳封裝概述 .............................................................................................. 4 AT89C51 單片機(jī)工作的基本時(shí)序 .................................................................................. 6 AT89C51 單片機(jī)的內(nèi)部結(jié)構(gòu)及存儲(chǔ)器配置 : ................................................................. 6 AT89C51 單片機(jī)的內(nèi)部結(jié)構(gòu) .................................................................................... 6 AT89C51 單片機(jī)的存儲(chǔ)器配置 ................................................................................ 7 AT89C51 單片機(jī)鍵盤(pán)設(shè)計(jì)方案論證 .............................................................................. 8 3 系統(tǒng)硬件設(shè)計(jì)與實(shí)現(xiàn) ................................................................................... 10 系統(tǒng)原理圖 ..................................................................................................................... 10 AT89C51 單片機(jī)的最小系統(tǒng)設(shè)計(jì) ................................................................................ 10 最小系統(tǒng) 設(shè)計(jì) ......................................................................................................... 10 時(shí)鐘頻率電路的設(shè)計(jì) ............................................................................................. 11 復(fù)位電路的設(shè)計(jì) ...................................................................................................... 11 數(shù)碼管顯示電路 ............................................................................................................. 12 數(shù)碼管的結(jié)構(gòu) .......................................................................................................... 12 數(shù)碼管的設(shè)計(jì)選擇 .................................................................................................. 13 鍵盤(pán)掃描電路的設(shè)計(jì) .................................................................................................... 13 鍵盤(pán)的作用 .............................................................................................................. 13 鍵盤(pán)系統(tǒng)設(shè)計(jì) ......................................................................................................... 14 喇叭控制電路 的設(shè)計(jì) .................................................................................................... 17 4 系統(tǒng)軟件的設(shè)計(jì) ............................................................................................ 18 程序流程框圖 ................................................................................................................. 18 系統(tǒng)工作原理 ................................................................................................................. 18 系統(tǒng)程序設(shè)計(jì) ................................................................................................................. 19 程序設(shè)計(jì) .................................................................................................................. 19 鍵盤(pán)掃描程序的設(shè)計(jì) .............................................................................................. 19 5 仿真及其調(diào)試 ................................................................................................ 21 基于單片機(jī)的鍵盤(pán)控制設(shè)計(jì) 鍵盤(pán)控制 PROTENUS 軟件的仿真 .................................................................................. 21 軟件調(diào)試 ......................................................................................................................... 21 結(jié) 論 .......................................................................................................... 22 致 謝 .......................................................................................................... 23 參考文獻(xiàn) .......................................................................................................... 24 附 錄 .......................................................................................................... 25基于單片機(jī)的鍵盤(pán)控制設(shè)計(jì) 1 1 緒 論 AT89C51 單片機(jī) 設(shè)計(jì)意義和目的： 隨著計(jì)算機(jī)及電子技術(shù)的飛躍發(fā)展，單片機(jī)也在不斷更新?lián)Q代，并成為電子系統(tǒng)中進(jìn)行數(shù)據(jù)采集，信息處理，通信聯(lián)絡(luò)和實(shí)施控制的重要器件。 關(guān)鍵詞： AT89C51 單片機(jī) 矩陣式鍵盤(pán) 按鍵掃描 基于單片機(jī)的鍵盤(pán)控制設(shè)計(jì) II Abstract The monolithic integrated circuit namely monolithic microputer (SingleChip Microputer), is collection CPU, RAM, ROM, fixed time, counting and many kinds of connections in a body micro applies in each domain. The present paper design monolithic integrated circuit keyboard mainly controls by at89C51 monolithic integrated keyboard control system is posed by the monolithic integrated circuit smallest system and the LED display circuit. The use monolithic integrated circuit C language carried on the programmi ng, the realization may establish the present paper mainly to introduce the keyboard designed the software and hardware part design, as well as the question and the solution which in the design, the debugging process met[13]. This design including the hardware design and the software design, hardware design including the clock electric circuit, repositions the electric circuit, the 4*4 matrix form keyboard electric circuit and the LED digita display circuit. Need choice use scanning way。 本設(shè)計(jì)的與眾不同之處在于其既能實(shí)現(xiàn)常規(guī)數(shù)字的顯示，同時(shí)還能實(shí)現(xiàn)作為 簡(jiǎn)單的電子琴，不同的鍵表示不同的音符；還能夠?qū)崿F(xiàn)簡(jiǎn)單計(jì)算功能。 本設(shè)計(jì)包括硬件設(shè)計(jì)和軟件設(shè)計(jì)，其中的硬件設(shè)計(jì)包括時(shí)鐘電路，復(fù)位電路， 4*4矩陣式鍵盤(pán)電路和 LED 數(shù)字顯示電路。該鍵盤(pán)控制系統(tǒng)是由單片機(jī)最小系統(tǒng)及 LED 顯示電路組成?；趩纹瑱C(jī)的鍵盤(pán)控制設(shè)計(jì) I 摘 要 單片機(jī)即單片微型計(jì)算機(jī)（ SingleChip Microputer），是集 CPU,RAM,ROM,定時(shí)，計(jì)數(shù)和多種接口于一體的微控制器 ， 廣泛應(yīng)用于各個(gè)領(lǐng)域 [1]。 本論文設(shè)計(jì)的單片機(jī)鍵盤(pán)主要由 AT89C51 單片機(jī)控制。使用單片機(jī) C 語(yǔ)言進(jìn)行編程，實(shí)現(xiàn)可設(shè)定本論文主要介紹了鍵盤(pán)設(shè)計(jì)的軟、硬件部分的設(shè)計(jì)，以及在設(shè)計(jì)、調(diào)試過(guò)程中遇到的問(wèn)題及解決方案 。其中需要選擇使用的掃描方式；為防鍵盤(pán)判斷失誤，導(dǎo)致實(shí)現(xiàn)多次按鍵按鍵的顯示問(wèn)題，需要去抖動(dòng)的處理，其顯示需要七段數(shù)碼管顯示。 本課題設(shè)計(jì)的鍵盤(pán)控制系統(tǒng)結(jié)構(gòu)簡(jiǎn)單，造價(jià)成本低，功能齊全，具有很強(qiáng)的實(shí)用性。 In order to guard against the keyboard judgment fault, causes the realization many times the pressed key demonstration question, needs to vibrate processing, its demonstration needs seven section of nixietube demonstrations. This design out of the ordinary place lies in it already to be able to realize the conventional numeral demonstration, meanwhile can realize takes the electric piano, the di