sd card

README.md

@@ -2,12 +2,19 @@
 
 
 ## Pins
+Amplifier:
 RX -> DIN
 D8 -> BCLK
 D4 -> LRC
 5V -> Vin
 GND -> GND
 
+SD Card:
+CS -> D1
+MOSI -> D7
+CLK -> D5
+MISO -> D6
+
 ## Links
 
 https://github.com/earlephilhower/ESP8266Audio

src/main.cpp

@@ -8,9 +8,19 @@
 #include "AudioFileSourceSPIFFS.h"
 #include "AudioGeneratorMP3.h"
 #include "AudioOutputI2SNoDAC.h"
+#include "AudioFileSourceSD.h"
+
+#include <SPI.h>
+#include <SD.h>
+
+File root;
+File mp3File;
+
+void printDirectory(File dir, int numTabs);
 
 AudioGeneratorMP3 *mp3;
 AudioFileSourceSPIFFS *file;
+AudioFileSourceSD *sdFile = NULL;
 AudioOutputI2S *out;
 
 unsigned long lastStart = 0;
@@ -19,6 +29,14 @@ const int startDelay = 250;
 
 void initMp3File() {
   file = new AudioFileSourceSPIFFS("/ex2.mp3");
+
+  File next = root.openNextFile();
+  if (!next) {
+    root = SD.open("/");
+  }
+  if (String(next.name()).endsWith(".mp3")) {
+    sdFile = new AudioFileSourceSD(next.name());
+  }
   out = new AudioOutputI2S();
   mp3 = new AudioGeneratorMP3();
 }
@@ -56,6 +74,22 @@ void setup()
   // if you get here you have connected to the WiFi
   Serial.println("connected...yeey :)");
   audioLogger = &Serial;
+
+
+    Serial.print("Initializing SD card...");
+
+  if (!SD.begin(D1)) {
+    Serial.println("initialization failed!");
+    while (1);
+  }
+  Serial.println("initialization done.");
+
+  root = SD.open("/");
+  
+
+  //printDirectory(root, 0);
+
+  Serial.println("done!");
   
   SPIFFS.begin();
   Serial.println("beginning mp3 setup...");
@@ -64,6 +98,29 @@ void setup()
 
 }
 
+void printDirectory(File dir, int numTabs) {
+  while (true) {
+
+    File entry =  dir.openNextFile();
+    if (! entry) {
+      // no more files
+      break;
+    }
+    for (uint8_t i = 0; i < numTabs; i++) {
+      Serial.print('\t');
+    }
+    Serial.print(entry.name());
+    if (entry.isDirectory()) {
+      Serial.println("/");
+      printDirectory(entry, numTabs + 1);
+    } else {
+      // files have sizes, directories do not
+      Serial.print("\t\t");
+      Serial.println(entry.size(), DEC);
+    }
+    entry.close();
+  }
+}
 
 
 void loop()
@@ -72,13 +129,12 @@ void loop()
   
   if (digitalRead(D3)==LOW) {
     unsigned long now = millis();
-    Serial.print("LOW");
     if (now-lastStart>startDelay) {
       if (mp3->isRunning()) {
         mp3->stop();
       }
       initMp3File();
-      mp3->begin(file,out);
+      mp3->begin(sdFile,out);
       Serial.print("started.");
       lastStart=now;
     }