播放MP3

AudioPro播放MP3示例 在下面的示例中，使用Core+核心控制AudioPro模块从SD卡中读取MP3播放。 所需硬件 MCookie-Core+ MBattery+ MCookie-Module AudioPro MCookie-SD 一张TF卡/MicroSD卡（存有音乐） 喇叭 电路搭建 将Battery+、Core+、MCookie_SD、MCookie-Module AudioPro堆叠在一起，并插入SD卡，通过MicroUSB数据线接入电脑。 代码 /* Microduino_AudioPro支持库例程 模块WIKI：https://wiki.microduino.cn/index.php/MCookie-Module_AudioPro 串口控制的简易MP3，需配合Microduino_SD模块使用 详情见help */ #include <Microduino_AudioPro.h> #include <SD.h> AudioPro_FilePlayer musicPlayer = AudioPro_FilePlayer(SD); uint8_t fileNum = 0; //文件数量 void playNum(uint8_t num) { if (num > musicPlayer.getMusicNum() - 1) { return; } if (!musicPlayer.stopped()) { musicPlayer.stopPlaying(); //必要，否则SD类得不到关闭，内存溢出 } musicPlayer.flushCancel(both); //清缓存，播放MIDI等格式文件时必要 String _name = musicPlayer.getMusicName(num); Serial.print(F("Playing:")); if (!musicPlayer.playMP3(_name)) { Serial.println(F("ERROR")); } else { Serial.print(F("OK \t File: ")); Serial.println(_name); } } void setup() { Serial.begin(115200); Serial.println(F("AudioPro(VS1053) Simple Test")); pinMode(SD_PIN_SEL, OUTPUT); //先初始化AudioPro，所以先使能SD卡 digitalWrite(SD_PIN_SEL, HIGH); delay(500); if (! musicPlayer.begin()) { // initialise the music player Serial.println(F("Couldn't find VS1053, do you have the right pins defined?")); while (1); } Serial.println(F("VS1053 found")); if (!SD.begin(SD_PIN_SEL)) { Serial.println(F("initialization failed!")); return; } Serial.println(F("initialization done.")); musicPlayer.setVolume(96); //left & right 0-127 //or //musicPlayer.setVolume(96, 96); //left right 0-127 // If DREQ is on an interrupt pin, we can do background musicPlayer.useInterrupt(VS1053_PIN_DREQ); // DREQ int help(); } void loop() { if (Serial.available()) { char c = Serial.read(); if ((0x20 <= c) && (c <= 0x126)) { // strip off non-ASCII, such as CR or LF if (c >= '0' && c <= '9') { int num = c - 48; playNum(num); } else if (c == 'a') { //控制运放开关 if (! musicPlayer.getAmplifier()) { Serial.println(F("Amplifier On")); musicPlayer.setAmplifier(true); } else { Serial.println(F("Amplifier Off")); musicPlayer.setAmplifier(false); } } else if (c == 's') { //停止播放音乐 Serial.println(F("Stopping")); musicPlayer.stopPlaying(); } // if we get an 'p' on the serial console, pause/unpause! else if (c == 'p') { //暂停播放音乐 if (musicPlayer.stopped()) { Serial.println(F("Player is Stopping.")); } else if (! musicPlayer.paused()) { Serial.println(F("Paused")); musicPlayer.pausePlaying(true); } else { Serial.println(F("Resumed")); musicPlayer.pausePlaying(false); } } else if ((c == '-') || (c == '+')) { //调整音量 int _volume; if (c == '-') { // note dB is negative _volume = musicPlayer.volumeDown(); } else { _volume = musicPlayer.volumeUp(); } Serial.print(F("Volume changed to ")); Serial.println(_volume); } else if (c == 'i') { //显示系统常见信息 Serial.print(F("getVolume:")); Serial.println(musicPlayer.getVolume()); Serial.print(F("getAmplifier:")); Serial.println(musicPlayer.getAmplifier()); Serial.print(F("getPlaySpeed:")); Serial.println(musicPlayer.getPlaySpeed()); Serial.print(F("decodeTime:")); Serial.println(musicPlayer.decodeTime()); } else if ((c == '>') || (c == '<')) { //控制播放速度 uint16_t playspeed = musicPlayer.getPlaySpeed(); // create key_command existing variable // note playspeed of Zero is equal to ONE, normal speed. if (c == '>') { // note dB is negative playspeed ++; // keep it simpler with whole dB's } else { playspeed --; } playspeed = constrain(playspeed, 1, 127); musicPlayer.setPlaySpeed(playspeed); // commit new playspeed Serial.print(F("playspeed to ")); Serial.println(playspeed, DEC); } else if (c == 'm') { //立体声 uint16_t monostate = musicPlayer.getMonoMode(); Serial.print(F("Mono Mode ")); if (monostate == 0) { musicPlayer.setMonoMode(1); Serial.println(F("Enabled.")); } else { musicPlayer.setMonoMode(0); Serial.println(F("Disabled.")); } } else if (c == 'd') { //差分输出 uint16_t diff_state = musicPlayer.getDifferentialOutput(); Serial.print(F("Differential Mode ")); if (diff_state == 0) { musicPlayer.setDifferentialOutput(1); Serial.println(F("Enabled.")); } else { musicPlayer.setDifferentialOutput(0); Serial.println(F("Disabled.")); } } else if (c == 'r') { //复位VS1053 Serial.println(F("Reset Player.")); musicPlayer.reset(); } else if (c == 'n') { //初始化VS1053 Serial.println(F("begin Player.")); musicPlayer.begin(); } else if (c == 'f') { //关闭VS1053 Serial.println(F("End Player.")); musicPlayer.end(); } else if (c == 'l') { //列出音乐文件清单 if (musicPlayer.paused() || musicPlayer.stopped()) { Serial.println(F("Enter Index of File to play")); fileNum = musicPlayer.getMusicNum(); //可以获取SD卡中曲目列表以及数量 Serial.print(F("Music Files : ")); Serial.println(fileNum); for (uint8_t a = 0; a < fileNum; a++) { Serial.print(F("\t File[")); Serial.print(a); Serial.print(F("]: ")); Serial.println(musicPlayer.getMusicName(a)); } } else { Serial.println(F("Busy Playing Files, try again later.")); } } else if (c == 'h') { //显示帮助 help(); } } } delay(100); } void help() { Serial.println(F("Microduino AudioPro Library Example:")); Serial.println(F("COMMANDS:")); Serial.println(F(" [0-9] to play a track")); Serial.println(F(" [a] to Set Amplifier")); Serial.println(F(" [s] to stop playing")); Serial.println(F(" [p] to pause or unpause")); Serial.println(F(" [s] to stop playing")); Serial.println(F(" [+ or -] to change volume")); Serial.println(F(" [> or <] to increment or decrement play speed by 1 factor")); Serial.println(F(" [m] Toggle between Mono and Stereo Output.")); Serial.println(F(" [d] to toggle SM_DIFF between inphase and differential output")); Serial.println(F(" [r] Resets and initializes VS10xx chip.")); Serial.println(F(" [f] turns OFF the VS10xx into low power reset.")); Serial.println(F(" [n] turns ON the VS10xx out of low power reset.")); Serial.println(F(" [i] retrieve current audio information (partial list)")); Serial.println(F(" [l] Display list of music files")); Serial.println(F(" [h] this help")); } 运行结果 对照列表中的项目，每一行开头的字符通过串口输入（波特率115200）： 0~9 播放SD卡中的歌曲，实际可以更多，此处为示例，可以通过程序修改 a 开/关LM4863功放模块 s 停止播放 P 暂停播放/继续播放 +或- 增加1点音量或降低1点音量，可在串口连续输入 >或< 加速播放或减速播放 m 切换单声道（mono）与立体声（stereo） d 切换同相/区分输出 r 重启VS1053芯片 f 将VS1053设置为低功耗模式并重启 n 将VS1053从低功耗模式唤醒 i 获取当前音频信息 l 获取播放列表 h 帮助列表

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