基于单片机的音乐播放器系统毕业设计.doc

河南科技学院新科学院 2013届本科毕业论文 基于单片机的音乐播放器系统设计 学生姓名： 所在系别： 所学专业： 导师姓名： 完成时间：  基于单片机的音乐播放器系统设计摘 要 当今，利用单片机控制音乐播放多不胜举，音乐芯片也相当之多，而利用单片机存储音乐，控制播放最为广泛。它有功能多、价格优、外围电路简单的特点，很受音乐爱好者及音乐芯片制造商的青昧。本设计中，用单片机芯片及少数外围电路控制音乐播放。 本设计是以单片机AT89C51为核心数据处理器件，由LCD液晶显示屏LCD1602显示歌曲的曲号、播放时间、开机画面以及键号，开机画面为交替显示WELCOM HERE和作者姓名。采用4*4行列式键盘实现曲号的选择和电子琴按键的输入。MP3模式中，单片机控制从SD存储器中读取数据，先由解码器解码，通过D/A转换器，再有功率放大器，最后由扬声器放出音乐；电子琴模式中当键盘有键按下时，判断键值，启动计数器T0，产生一定频率的脉冲，经过D/A转换，功率放大，放出乐曲；录音模式中，由MIC接收声源，单片机控制存储在SD卡中。元件以低耗、高能、耐用、精确、易于操作等为优先考虑因素。 该音乐播放器的论文详细介绍了其硬件结构和设计方法，整个设计简单实用，功能完整。 关键词：音乐播放器，AT89C51，液晶显示LCD1062，SD存储卡，矩形键盘 Music player system based on single chip design Abstract Today, the use of single-chip microcomputer control music playback Too numerous to list, more music chip also very much, and the use of single chip microcomputer to store music, broadcast control is the most widely. It has many functions, price is excellent, the characteristics of the peripheral circuit is simple, popular with music lovers and music chip maker. In this design, MCU chip and a few peripheral circuits to control music playback. This design is based on single-chip microcomputer AT89C51 as the core of data processing devices, by the LCD display LCD1602 display the song of songs, play time, boot screen and keys, for alternate boot screen show WELCOM HERE and the name of the author. 4 * 4 determinant keyboard was adopted to realize the choice of song, and the keyboard input keys. MP3 mode, the SCM control reads data from the SD memory, first by the decoder decoding, through D/A converter, power amplifier, and finally by the loudspeaker released music; Keyboard mode when the keyboard has A key press, key values, start the counter T0, produce A certain frequency of pulse, through D/A conversion, power amplifier, release music; Recording mode, by MIC receives sound, single-chip microcomputer control storage in the SD card. Components with low consumption, high energy, durabili