播放MP3
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AudioPro播放MP3示例
所需硬件
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"));
}
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）：
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