【正文】 件采用 ATMEL 高密度非易失存儲(chǔ)器制造技術(shù)制造，與工業(yè)標(biāo)準(zhǔn)的MCS51 指令集和輸出管腳相兼容。 [2]AT89C2051 是一種帶 2K 字節(jié)閃爍可編程可擦除只讀存儲(chǔ)器的單片機(jī)。該電子門鈴具有普通門鈴的功能，而且還具有一些擴(kuò)展功能。日后可在此基礎(chǔ)上進(jìn)一步完善，如增加語音防盜報(bào)警功能、有人無人語音門鈴切換功能，甚至增加可視對講功能等。研究內(nèi)容為開發(fā)研究出低成本音樂門鈴。掌握單片機(jī)的體系結(jié)構(gòu)、工作原理、指令系統(tǒng)與編程技巧以及相關(guān)接口技術(shù)，熟悉單片機(jī)開發(fā)工具并掌握單片機(jī)應(yīng)用系統(tǒng)的設(shè)計(jì)開發(fā)流程；選擇并設(shè)計(jì)合理的補(bǔ)償算法與程序結(jié)構(gòu)；掌握相應(yīng)的抗干擾措施；設(shè)計(jì)出系統(tǒng)的硬件結(jié)構(gòu)與接口電路，編寫相關(guān)軟件。門燈經(jīng)一段時(shí)間的延時(shí)后自動(dòng)熄滅；無限遙控門鈴，采用脈沖調(diào)制發(fā)射，及石英晶振穩(wěn)頻技術(shù)，實(shí)現(xiàn)遠(yuǎn)距離遙控。經(jīng)了解，現(xiàn)在市場上所有銷售的門鈴主要有以下幾種：敲擊式電子音樂門鈴，采用聲控觸發(fā)電路和音樂集成電路組成，通過一個(gè)可調(diào)電阻來控制喇叭的靈敏度，一個(gè)電容快速充電來維持后續(xù)工作；不用按鈕的音樂門鈴，采用紅外線發(fā)射接收電路和自激多諧振蕩電路構(gòu)成，蕩發(fā)出的紅外線被人遮擋住的一瞬間，揚(yáng)聲器就發(fā)出有沒動(dòng)聽的音樂；帶們演示電路的音樂門鈴，采用低功耗交流繼電器 TLP3502 和高頻小功率管組成。 國內(nèi)外研究狀況目前在家庭住宅中使用的電子門鈴大多數(shù)是沒用音樂，只有簡單的叮咚叮當(dāng)?shù)穆曇?，比較單調(diào)。由于電子音樂門鈴具有鈴聲悅耳動(dòng)聽，價(jià)格低廉、耗電少等優(yōu)點(diǎn)，在現(xiàn)代家具中的應(yīng)用越來越流行。人們已開始習(xí)慣用門鈴系統(tǒng)代替?zhèn)鹘y(tǒng)的鐵鑰匙去管理各通道門，這使門鈴系統(tǒng)得到了飛躍性的發(fā)展。在這些領(lǐng)域中，單片機(jī)起到了舉足輕重的作用，這就把單片機(jī)的應(yīng)用提升到重要的地位，單片機(jī)應(yīng)用系統(tǒng)設(shè)計(jì)就成為新的技術(shù)熱點(diǎn)。AbstractDoorbell application, can be seen everywhere in modern society, but because of various considerations, such as low cost, voice pattern, we need to dig further. The design of this thesis is to focus on research and development cost music doorbell. Mainly applied to the 51chip, 51 chip is a microprocessor, microcontroller 51 has excellent performance and low cost, high integration, small size, high reliability, high control, low voltage, low power consumption. The design of the basic functions of music doorbell can be from 51 chips, and low prices. In addition to the basic part of the circuit chip, but also need to expand the sound section, use 386DE chip. Expand the system around the low cost and expand the function by the program partially achieved. First with the c language code to achieve musical doorbell, and then use keil software c language generated hex file to stc89c51 integrated chip, the use of different frequencies make different tone, the use of delay have different beats, transmitted through the power amplifier To the speaker to broadcast the wonderful music. To further reduce costs, so the design process the main part is pleted, the program is divided into subject and extension. Extension of the provisions of the songs used in rhythm, tone control. Extension from the main program, music tracks and songs posed of an array of functions. In the use of drawing tools to plete the basic circuit design, and then soldering the circuit, and finally reentering into a part. Key words：Single chip, Lowcost, Program,Music 目錄1 緒論 .........................................................................................................................................1 題目背景及目的 ..............................................................................................................1 國內(nèi)外研究狀況 ..............................................................................................................1 題目研究方法 ..................................................................................................................2 論文構(gòu)成及研究內(nèi)容 .......................................................................................................22 電子音樂門鈴系統(tǒng)簡介 .........................................................................................................3 分析功能要求 ...................................................................................................................3 系統(tǒng)原理與控制方法 ......................................................................................................4 單片機(jī)發(fā)音概述 ..............................................................................................................4 音調(diào) ........................................................................................................................4 節(jié)拍 ........................................................................................................................53 系統(tǒng)硬件設(shè)計(jì) .........................................................................................................................7 原理簡介 ..........................................................................................................................7 主電路設(shè)計(jì) ......................................................................................................................8 音樂功放電路設(shè)計(jì) ........................................................................................................11 概述 ......................................................................................................................11 特性 ......................................................................................................................12 應(yīng)用電路 ...............................................................................................................12 芯片使用方法與自激嘯叫防治措施 ..................................................................144 系統(tǒng)軟件設(shè)計(jì) .......................................................................................................................16 軟件介紹 ........................................................................................................................16 主程序設(shè)計(jì) ....................................................................................................................18 播放文件程序設(shè)計(jì) ........................................................................................................205 系統(tǒng)調(diào)試與實(shí)現(xiàn) ...................................................................................................................22 硬件調(diào)試與實(shí)現(xiàn) ............................................................................................................22 軟件調(diào)試與實(shí)現(xiàn) .....................................................................................