working I2S DAC

FW/m5stack_audio/src/main.cpp

@@ -1,55 +1,96 @@
-#pragma mark - Depend ESP8266Audio and ESP8266_Spiram libraries
-/* 
-cd ~/Arduino/libraries
-git clone https://github.com/earlephilhower/ESP8266Audio
-git clone https://github.com/Gianbacchio/ESP8266_Spiram
-*/
+#include <Arduino.h>
 
-
-#include <M5Core2.h>
-#include <driver/i2s.h>
-#include <WiFi.h>
-#include "AudioFileSourceSD.h"
-#include "AudioFileSourceID3.h"
+#include "AudioFileSourcePROGMEM.h"
+#include <AudioFileSourceLittleFS.h>
+//#include "AudioGeneratorWAV.h"
 #include "AudioGeneratorMP3.h"
+#include "AudioFileSourceID3.h"
 #include "AudioOutputI2S.h"
 
+#include "storage.h"
 
+// VIOLA sample taken from https://ccrma.stanford.edu/~jos/pasp/Sound_Examples.html
+#include "viola.h"
+
+//AudioGeneratorWAV *wav;
 AudioGeneratorMP3 *mp3;
-AudioFileSourceSD *file;
-AudioOutputI2S *out;
 AudioFileSourceID3 *id3;
 
-#define OUTPUT_GAIN 30
+AudioFileSourceLittleFS *file;
+
+AudioOutputI2S *out;
+
+const char *waveFile = "/003_short.mp3";
+
+// Called when a metadata event occurs (i.e. an ID3 tag, an ICY block, etc.
+void MDCallback(void *cbData, const char *type, bool isUnicode, const char *string)
+{
+  (void)cbData;
+  Serial.printf("ID3 callback for: %s = '", type);
+
+  if (isUnicode)
+  {
+    string += 2;
+  }
+
+  while (*string)
+  {
+    char a = *(string++);
+    if (isUnicode)
+    {
+      string++;
+    }
+    Serial.printf("%c", a);
+  }
+  Serial.printf("'\n");
+  Serial.flush();
+}
+
+// Called when there's a warning or error (like a buffer underflow or decode hiccup)
+void StatusCallback(void *cbData, int code, const char *string)
+{
+  const char *ptr = reinterpret_cast<const char *>(cbData);
+  // Note that the string may be in PROGMEM, so copy it to RAM for printf
+  char s1[64];
+  strncpy_P(s1, string, sizeof(s1));
+  s1[sizeof(s1)-1]=0;
+  Serial.printf("STATUS(%s) '%d' = '%s'\n", ptr, code, s1);
+  Serial.flush();
+}
 
 void setup()
 {
-  M5.begin();
-  M5.Axp.SetSpkEnable(true);
+  Serial.begin(115200);
+  delay(1000);
 
-  WiFi.mode(WIFI_OFF); 
-  delay(500);
-  
-  M5.Lcd.setTextFont(2);
-  M5.Lcd.printf("Sample MP3 playback begins...\n");
-  Serial.printf("Sample MP3 playback begins...\n");
+  initStorage();
 
-  file = new AudioFileSourceSD("/003.mp3");
+  audioLogger = &Serial;
+  file = new AudioFileSourceLittleFS(waveFile);
   id3 = new AudioFileSourceID3(file);
-  out = new AudioOutputI2S(0, 0); // Output to builtInDAC
-  out->SetPinout(12, 0, 2);
-  out->SetOutputModeMono(true);
-  out->SetGain((float)OUTPUT_GAIN/100.0);
+  id3->RegisterMetadataCB(MDCallback, (void *)"ID3TAG");
+
   mp3 = new AudioGeneratorMP3();
+  mp3->RegisterStatusCB(StatusCallback, (void*)"mp3");
+
+  out = new AudioOutputI2S();
+  out->SetPinout(21, 13, 14); //bclk, wclk, data
   mp3->begin(id3, out);
+  out->SetGain(0.25);
 }
 
 void loop()
 {
-  if (mp3->isRunning()) {
-    if (!mp3->loop()) mp3->stop();
-  } else {
-    Serial.printf("MP3 done\n");
+  if (mp3->isRunning())
+  {
+    if (!mp3->loop())
+    {
+      mp3->stop();
+    }
+  }
+  else
+  {
+    Serial.printf("sound done\n");
     delay(1000);
   }
-}
+}