【正文】 9S52 為主芯片，附有矩陣鍵盤、 LED 顯示管、揚聲器組成。本系統(tǒng)運行穩(wěn)定，其優(yōu)點是硬件電路簡單，軟件功能完善，控制系統(tǒng)可靠，性價比較高等，具有一定的實用和參考價值。 Design of electronic an based on MCU Abstract： Microputers are large scale integrated circuit technology development of the fourth generation of the product, electronic puters, it has high performance, high speed, small volume, low prices, stable and reliable, widely characteristics. Just because it39。s life, bee part of the entertainment and leisure. This system is mainly 51 series microcontroller AT89S52, acpanied by matrix keyboard, chip, speaker ， LED. System pletes display input information, the basic function such as broadcast corresponding notes. This system stable operation, its advantage is hardware circuit is simple, software function consummation, the control system is reliable, costeffective higher, has certain practical and reference value. Keywords: AT89S52, matrix, LED, speaker 目 錄 1 引 言 ........................................................................................................................ 1 課題的背景和意義 ................................................................................................... 1 課題的研究內(nèi)容 與擬解決的主要問題 ....................................................................... 2 2 任務(wù)要求與總體設(shè)計方案 ............................................................................................ 3 系統(tǒng)設(shè)計要求 .......................................................................................................... 3 單片機簡介 ............................................................................................................. 3 .................................................................................................. 3 單片機的應(yīng)用 .................................................................................................... 3 系統(tǒng)框圖 ................................................................................................................. 4 元件簡介 ................................................................................................................. 4 AT89S52 ............................................................................................................ 4 LM386 .............................................................................................................. 6 3 硬件設(shè)計及說明 .......................................................................................................... 8 系統(tǒng)硬件總體設(shè)計 ................................................................................................... 8 系統(tǒng)的工作原理 .....................................................................................................10 矩陣鍵盤模塊 ...................................................................................................12 數(shù)碼管模塊 ......................................................................................................14 揚聲器模塊 ......................................................................................................14 紅外電源模塊 ..................................................................................................15 4 軟件設(shè)計 ...................................................................................................................16 整體程序處理流程圖 ..............................................................................................16 如何用單片機實現(xiàn)音樂的節(jié)拍 ................................................................................17 音樂播放設(shè)計 ........................................................................................................18 5 系統(tǒng)調(diào)試 ...................................................................................................................20 程序調(diào)試 ...............................................................................................................20 仿真調(diào)試 ................................................................................................................22 結(jié)論 ................................................................................................................................25 參考文獻(xiàn) .........................................................................................................................26 致謝 ................................................................................................................................27 附錄 1 系統(tǒng)硬件實物圖 ....................................................................................................28 附錄 2 系統(tǒng)電路原理圖及 PCB圖 ...................................................................................29 附錄 3 系統(tǒng)主要程序 ......................................................................................................30 1 1 引 言 課題的背景和意義 隨著生活水平的提高，人們的需求不再僅僅是物質(zhì)上的滿足，更多的是要求精神上的放松。學(xué)習(xí)和欣賞音樂可以在人們疲勞的時候得到放松，同時提高人們的精神品質(zhì)和素養(yǎng)。而一些簡易的電子樂器價格相對便宜，學(xué)習(xí)簡單，價格相對便宜，能夠了滿足一般愛好者的需求。 單片機是在一塊芯片內(nèi)集成了計算機的各個功能部件，構(gòu)成一種單片式的微型計算機。并已廣泛應(yīng)用到人類生活的各個領(lǐng)域，如家電、通訊設(shè)備、玩具、智能卡、汽車及防盜、醫(yī)