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1-Demo/ARDUINO-DEMO/mp3_player/README.md

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+# 请使用arduino_esp32_v3.2.1版本
+# ESP32-audioI2S  V3.3.0
+# arduino-audio-driver  https://github.com/pschatzmann/arduino-audio-driver
+

1-Demo/ARDUINO-DEMO/mp3_player/mp3_player.ino

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+#include "string.h"
+#include "AudioBoard.h"  //https://github.com/pschatzmann/arduino-audio-driver
+#include "Audio.h"       //https://github.com/schreibfaul1/ESP32-audioI2S
+#include "SD_MMC.h"
+
+Audio audio;
+DriverPins my_pins;
+AudioBoard board(AudioDriverES8311, my_pins);  
+
+//SD_MMC 
+#define SD_D0    39
+#define SD_D1    40
+#define SD_D2    41
+#define SD_D3    42
+#define SD_CMD   44
+#define SD_CLK   43
+
+#define I2S_MCK_IO 13
+#define I2S_BCK_IO 12
+#define I2S_DI_IO 48
+#define I2S_WS_IO 10  
+#define I2S_DO_IO 9
+#define ES8311_PA 11
+
+#define I2C_SDA 7  
+#define I2C_SCL 8 
+#define ES8311_ADDRESS 0x18
+
+static char file_list[20][256];
+static int file_cnt = 0;
+static int cnt = 0;
+
+
+void listDir(fs::FS &fs, const char *dirname, uint8_t levels) {
+  Serial.printf("Listing directory: %s\n", dirname);
+
+  File root = fs.open(dirname);
+  if (!root) {
+    Serial.println("Failed to open directory");
+    return;
+  }
+  if (!root.isDirectory()) {
+    Serial.println("Not a directory");
+    return;
+  }
+
+  File file = root.openNextFile();
+  while (file) {
+    if (file.isDirectory()) {
+      Serial.print("  DIR : ");
+      Serial.println(file.name());
+      if (levels) {
+        listDir(fs, file.path(), levels - 1);
+      }
+    } else {
+      Serial.print("  FILE: ");
+      Serial.print(file.name());
+      snprintf(&file_list[file_cnt][0],256,"/music/%s",file.name());
+      file_cnt++;
+      Serial.print("  SIZE: ");
+      Serial.println(file.size());
+    }
+    file = root.openNextFile();
+  }
+}
+
+void setup() {
+
+  Serial.begin(115200);
+  Serial.println("start");
+  if(! SD_MMC.setPins(SD_CLK, SD_CMD, SD_D0, SD_D1, SD_D2, SD_D3)){
+       Serial.println("Pin change failed!");
+       return;
+    }
+  
+  if (!SD_MMC.begin()) {
+    Serial.println("Card Mount Failed");
+    return;
+  }
+
+  listDir(SD_MMC,"/music/",0);
+
+  // pinMode(ES8311_PA, OUTPUT);
+  // digitalWrite(ES8311_PA, HIGH);
+
+  my_pins.addI2C(PinFunction::CODEC,I2C_SCL,I2C_SDA,ES8311_ADDRESS);
+  my_pins.addPin(PinFunction::PA,ES8311_PA,PinLogic::Output);
+
+  CodecConfig cfg;
+  cfg.input_device = ADC_INPUT_LINE1;
+  cfg.output_device = DAC_OUTPUT_ALL;
+  cfg.i2s.bits = BIT_LENGTH_16BITS;
+  cfg.i2s.rate = RATE_44K;
+  // cfg.i2s.fmt = I2S_NORMAL;
+  // cfg.i2s.mode = MODE_SLAVE;
+  board.begin(cfg);
+
+  audio.setPinout(I2S_BCK_IO, I2S_WS_IO, I2S_DO_IO,I2S_MCK_IO);
+  audio.setVolume(4); // 0...21
+  audio.connecttoFS(SD_MMC, file_list[cnt]);
+}
+
+void loop() {
+audio.loop();
+}
+
+// optional
+void audio_info(const char *info){
+    Serial.print("info        "); Serial.println(info);
+}
+void audio_id3data(const char *info){  //id3 metadata
+    Serial.print("id3data     ");Serial.println(info);
+}
+void audio_eof_mp3(const char *info){  //end of file
+    Serial.print("eof_mp3     ");Serial.println(info);
+    cnt++;
+    if(cnt > file_cnt - 1)
+      cnt = 0;
+
+    audio.connecttoFS(SD_MMC, file_list[cnt]);
+
+}
+void audio_showstation(const char *info){
+    Serial.print("station     ");Serial.println(info);
+}
+void audio_showstreamtitle(const char *info){
+    Serial.print("streamtitle ");Serial.println(info);
+}
+void audio_bitrate(const char *info){
+    Serial.print("bitrate     ");Serial.println(info);
+}
+void audio_commercial(const char *info){  //duration in sec
+    Serial.print("commercial  ");Serial.println(info);
+}
+void audio_icyurl(const char *info){  //homepage
+    Serial.print("icyurl      ");Serial.println(info);
+}
+void audio_lasthost(const char *info){  //stream URL played
+    Serial.print("lasthost    ");Serial.println(info);
+}