【正文】 畢業(yè)設(shè)計(jì)（論文） I 基于單片機(jī)的電子琴及音樂播放器的設(shè)計(jì) 摘 要 近年來，隨著微電子技術(shù)的迅速發(fā)展和超大規(guī)模集成電路的出現(xiàn)，特別是單片機(jī)的出現(xiàn)， 所以目前的產(chǎn)品都致力于在功能全面、技術(shù)先進(jìn)、操作簡便、安全可靠、價(jià)格合理等方面進(jìn)行仔細(xì)研究，精心設(shè)計(jì) ， 及時(shí)掌握最新的單片機(jī)技術(shù)，在條件允許的情況下，盡可能地利用最新的單片機(jī)技術(shù)來研制其應(yīng)用系統(tǒng)，再利用單片機(jī)體積小、價(jià)格低、功能強(qiáng)等特點(diǎn)，以保證所設(shè)計(jì)的產(chǎn)品在未來的一段時(shí)間內(nèi)仍具生命力。 該設(shè)計(jì)是采用單片機(jī)來實(shí)現(xiàn)電子琴的彈奏和播放功能，系統(tǒng)由 AT89S52 作為主控芯片，顯 示模塊采用 LCD— 1602, 配合其他一些 器件 ， 采用匯編語言編寫程序 ， 實(shí)現(xiàn)多功能音樂播放 ， 歌曲自動循環(huán)播放和使用琴鍵自編曲目功能 。 此外 ， 彩燈顯示歌曲節(jié)奏 ，按鍵跳轉(zhuǎn)到喜愛曲目 ， 液晶顯示當(dāng)前播放英文曲目 。 該系統(tǒng)基本上能夠?qū)崿F(xiàn)自彈和播放音樂的功能，具有一定的實(shí)用性以及發(fā)展前景。 關(guān)鍵詞 :單片機(jī)；電子琴；音樂播放器； LCD— 1602。 基于單片機(jī)的電子琴及音樂播放器的設(shè)計(jì) II Design of Electronic Organ and Music Player Based on MCU Abstract In recent years, with microelectronics technology rapid development and the emergence of vlsi, especially MCU appear, so the products are mitted to prehensive functions, advanced technology, simple operation, safe and reliable, the price is reasonable, etc。 the careful research and design meticulously Keep abreast of the latest single chip microputer, in conditions allow, as far as possible, using the latest microcontroller technology to develop its application system, reuse microcontroller small volume, price low, the function is strong wait for a characteristic, to ensure that the design of products in the future remains within a period of time vitality. This design is to realize the onechip puter keyboards play and play function, system consists of AT89S52 devices as the master, display module with LCD1602, with the other devices, using some assembly language program, realizing the multifunction music playback, songs automatic looping and using selfmade repertoire function keys. In addition, the lantern displays song rhythm, key jump to favorite pieces, LCD display the current broadcast English repertoire. The system basically can realize the function of the music play, have certain practical development prospects. Keywords: MCU。 Electronic Organ。 Music Player 。 LCD— 1602. 畢業(yè)設(shè)計(jì)（論文） III 目錄 引言 ............................................................................................................................................ 1 第 1 章 緒論 .............................................................................................................................. 2 電子琴的發(fā)展 ..................................................................................................................... 2 音樂播放器的發(fā)展 ............................................................................................................. 2 單片機(jī)的應(yīng)用及發(fā)展方向 ................................................................................................. 2 第 2 章 電子琴及音 樂播放器的設(shè)計(jì)方案 .............................................................................. 4 電子琴的原理 ..................................................................................................................... 4 音樂播放器的原理 .............................................................................................................. 5 電子琴及音樂播放器 .......................................................................................................... 6 設(shè)計(jì)方案選擇 ..................................................................................................................... 6 第 3 章 系統(tǒng)硬件設(shè)計(jì) .............................................................................................................. 8 系統(tǒng)總體框圖 ..................................................................................................................... 8 中心控制模塊 ..................................................................................................................... 8 單片機(jī)的選擇 .................................................................................................. 8 AT89S52 引腳說明 ........................................................................................... 9 播放模塊 ........................................................................................................................... 11 顯示模塊 ........................................................................................................................... 12 LCD1602 引腳功能 ....................................................................................... 12 LCD1602 字符集 ........................................................................................... 13 LCD1602 指令集 ........................................................................................... 13 電子琴模塊 ....................................................................................................................... 14 彩燈模塊 ........................................................................................................................... 15 系統(tǒng)硬件總體設(shè)計(jì) ............................................................................................................ 16 第 4 章 系統(tǒng)軟件設(shè)計(jì) ............................................................................................................ 17 初始化程序和主程序 ....................................................................................................... 17 顯示子程序 ....................................................................................................................... 19 結(jié)論與展望 .............................................................................................................................. 21 致謝 .......................................................................................................................................... 22 參考文獻(xiàn) .................................................................................................................................. 23 附錄 A 硬件電路圖 ................................................................................................................ 24 附錄 B 一篇引用的外文 文獻(xiàn)及其譯文 ................................................................................ 24 附