Clean ESP32 build (#529)

Author: earlephilhower

src/AudioOutputI2S.cpp

@@ -201,7 +201,11 @@ bool AudioOutputI2S::begin(bool txDAC)
       }
       else if (lsb_justified)
       {
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 2, 0)
+        comm_fmt = (i2s_comm_format_t) I2S_COMM_FORMAT_STAND_MSB;
+#else
         comm_fmt = (i2s_comm_format_t) (I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_LSB);
+#endif
       }
       else
       {

src/spiram-fast.h

@@ -332,9 +332,9 @@ class ESP8266SPIRAM {
             }
             digitalWrite(csPin, HIGH);
 
-            pinMode(sck, SPECIAL);
-            pinMode(miso, SPECIAL);
-            pinMode(mosi, SPECIAL);
+            pinMode(sck, OUTPUT);
+            pinMode(miso, INPUT);
+            pinMode(mosi, OUTPUT);
             pinMode(csPin, OUTPUT);
 
             // Enable streaming read/write mode
@@ -364,4 +364,4 @@ class ESP8266SPIRAM {
 #endif  // ESP32
 
 
-#endif
+#endif