基于單片機(jī)的自動(dòng)音樂(lè)播放器的設(shè)計(jì)(已修改)
2025-11-03 10:20 本頁(yè)面
【正文】 基于單片機(jī)的自動(dòng)音樂(lè)播放器的設(shè)計(jì) 摘 要 為方便人們的日常生活，優(yōu)化學(xué)校、機(jī)關(guān)等單位的計(jì)時(shí)系統(tǒng)，采用以單片機(jī)為基礎(chǔ)設(shè)計(jì)了一種 的 自動(dòng)音樂(lè)播放器。本設(shè)計(jì)利用單片機(jī) 89C58RD+的定時(shí)和計(jì)數(shù)功能，來(lái)完成時(shí)間的顯示和定時(shí)功能。并且，通過(guò)對(duì)定時(shí)器初值的設(shè)定來(lái)產(chǎn)生不同頻率的聲音，利用定時(shí)器中斷來(lái)完成對(duì)音樂(lè)節(jié)拍長(zhǎng)度的控制。通過(guò) LM386N1音頻功率放大器，將單片機(jī)輸出的信號(hào)放大，再通過(guò)喇叭播放樂(lè)曲。通過(guò) MAX232型芯片，可以轉(zhuǎn)換 PC 機(jī)上的電壓和單片機(jī)的電源電壓，再通過(guò)串口接入 PC 機(jī)，這樣就能從 PC 機(jī)上將用 C 語(yǔ)言編寫的程序下載到單片機(jī)上。最后可在數(shù)碼管上顯示時(shí)間，當(dāng)定時(shí)時(shí)間到后，喇叭自動(dòng)播放一段連續(xù)的音樂(lè)。此設(shè)計(jì)擺脫了傳統(tǒng)鬧鐘的刺耳聲音，取而代之的是美妙的音樂(lè)，能為人們的日常生活提供準(zhǔn)確的計(jì)時(shí)，且成本低廉，值得推廣。 關(guān)鍵詞 :單片機(jī)；自動(dòng)音樂(lè)播放；音頻轉(zhuǎn)換；時(shí)間顯示； LM386N1音頻功率放大器 The design of automatic music player based on monolithic integrated circuit Abstract In order to facilitate people39。s daily life, optimizes schools’, institutions’ timing system, used has designed one kind of automatic music player which based on monolithic integrated circuit. This design fixed time and counts the function using monolithic integrated circuit 89C58RD+, pletes the time the demonstration and fixed time the function. And, Through hypothesis starting value of timer, product the different frequency sound. Severs using the timer pletesthe control of music metre LM386N1 audio power amplifier, enlarges signal which the monolithic integrated circuit outputs,then broadcast music from loudspeaker. Through MAX232 chip,can transform PC machine on the voltage and the monolithic integrated circuit supply then,turns on the puter though String mouth,then it can download procedure which piles with the C language to monolithic integrated circuit from last,it can demonstrates the time on the digital time to after fixed time, the loudspeaker automatically broadcasts section of continual musics. This design get rid of the traditional alarm clock’ s grating sound, displaces is the wonderful music,can provides the accurate time for people39。s daily design cost very inexpensive,it is worth promoting. Key word： Monolithic integrated circuit。 Automatic music broadcast。 Audio frequency transformation。 Time demonstration。 LM386N1 audio power amplifier 目 錄 論文總頁(yè)數(shù)：頁(yè) 引 言 .......................................................................1 1 設(shè)計(jì)任務(wù) ................................................................2 2 軟件 設(shè)計(jì) 音樂(lè)編程原理及流程圖 ............................................... 聲音的產(chǎn)生 ...................................................... 音頻轉(zhuǎn)換原理 .................................................... 音頻轉(zhuǎn)換流程圖 .............................................. 時(shí)間顯示程序設(shè)計(jì) .............................................. 時(shí)間顯示模塊 .............................................. 時(shí)鐘流程圖 .............................................. 3 硬件電路的 設(shè)計(jì) ..............................................................2 硬件流程模塊 （此節(jié)作為第 1節(jié) 后面幾節(jié)就圍繞它來(lái)寫，并且要寫“連貫”） 主要 模塊電路的設(shè)計(jì) .......................... 89C58RD+型 單片機(jī)介紹 ......................................... LM386N及外圍電路的 設(shè)計(jì) ............. ............... 串行通信和 MAX232芯片 ........................................... 4 AT89C52 的定時(shí) /計(jì)數(shù)器概述 ......................................... 5 LED 顯示原理 ...................................................... 4 KEIL 仿真軟件及 Protel 99 SE 的應(yīng)用 ...................................... KEIL51 的應(yīng)用 .......................................................... Protel 99 SE 的應(yīng)用 ..................................................... PCB 板制作 ............................................................. 5 仿真及調(diào)試過(guò)程 .......................................................... 硬件調(diào)試過(guò)程 軟件仿真及調(diào)試過(guò)程 6 結(jié)果分析 ................................................................ 結(jié) 論 ..................................................................... 參考文獻(xiàn) ....................................................................... 致 謝 .....................................................................29 聲 明 ...................
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