Added TGA Pro stock libraries demo

examples/TGA_Pro_nolib_demo/TGA_Pro_nolib_demo.ino

@@ -0,0 +1,121 @@
+/*************************************************************************
+ * This demo uses only the built-in libraries provided with the Arudino
+ * Teensy libraries. 
+ * 
+ * IT IS STRONGLY RECOMMENDED to use the BAGuitar Library located at
+ * https://github.com/Blackaddr/BAGuitar
+ * The BAGuitar library will made it easier to use the features of your
+ * GTA Pro board, as well and configure it correctly to eliminate
+ * unneccesary noise.
+ * 
+ * The built-in support for the WM8731 codec in the Teensy Library is very
+ * limited. Without proper configuration, the codec will produce a noisy
+ * output. This is caused by the default configuration the WM8731 powers
+ * up in. This can easily be corrected by installing the BAGuitar library
+ * 
+ * For instructions on installing additional libraries follow the
+ * instructions at https://www.arduino.cc/en/Guide/Libraries after downloading
+ * the BAGuitar repo from github as a zip file.
+ * 
+ */
+
+#include <Wire.h>
+#include <Audio.h>
+#include <MIDI.h>
+
+AudioInputI2S            i2sIn;
+AudioOutputI2S           i2sOut;
+
+// Audio connections, just connect the I2S input directly to the I2S output.
+AudioConnection      patch0(i2sIn,0, i2sOut, 0);
+AudioConnection      patch1(i2sIn,1, i2sOut, 1);
+
+AudioControlWM8731      codecControl; // needed to enable the codec
+
+unsigned long t=0;
+const int usrLED = 16; // the location of the GTA Pro user LED (not the LED on the Teensy itself)
+int usrLEDState = 0;
+
+void setup() {
+
+  // Configure the user LED pin as output
+  pinMode(usrLED, OUTPUT);
+  digitalWrite(usrLED, usrLEDState);
+
+  // Enable the MIDI to listen on all channels
+  MIDI.begin(MIDI_CHANNEL_OMNI);  
+  Serial.begin(57600); // Enable the serial monitor
+  Wire.begin(); // Enable the I2C bus for controlling the codec
+  delay(5);
+  
+  delay(100);
+  codecControl.disable(); // Turn off the codec first (in case it was in an unknown state)
+  delay(100);
+  AudioMemory(24);
+
+  Serial.println("Enabling codec...\n");
+  codecControl.enable(); // Enable the codec
+  delay(100);
+  
+
+}
+
+void loop() {  
+  
+  ///////////////////////////////////////////////////////////////////////
+  // MIDI TESTING
+  // Connect a loopback cable between the MIDI IN and MIDI OUT on the
+  // GTA Pro.  This test code will periodically send MIDI events which
+  // will loop back and get printed in the Serial Monitor.
+  ///////////////////////////////////////////////////////////////////////
+  int type, note, velocity, channel, d1, d2;
+
+  // Send MIDI OUT
+  int cc, val=0xA, channelSend = 1;
+  for (cc=32; cc<40; cc++) {
+    MIDI.sendControlChange(cc, val, channelSend); val++; channelSend++;
+    delay(100);
+    MIDI.sendNoteOn(10, 100, channelSend);
+    delay(100);
+  }
+  
+  if (MIDI.read()) {                    // Is there a MIDI message incoming ?
+    byte type = MIDI.getType();
+    Serial.println(String("MIDI IS WORKING!!!"));
+    switch (type) {
+      case NoteOn:
+        note = MIDI.getData1();
+        velocity = MIDI.getData2();
+        channel = MIDI.getChannel();
+        if (velocity > 0) {
+          Serial.println(String("Note On:  ch=") + channel + ", note=" + note + ", velocity=" + velocity);
+        } else {
+          Serial.println(String("Note Off: ch=") + channel + ", note=" + note);
+        }
+        break;
+      case NoteOff:
+        note = MIDI.getData1();
+        velocity = MIDI.getData2();
+        channel = MIDI.getChannel();
+        Serial.println(String("Note Off: ch=") + channel + ", note=" + note + ", velocity=" + velocity);
+        break;
+      default:
+        d1 = MIDI.getData1();
+        d2 = MIDI.getData2();
+        Serial.println(String("Message, type=") + type + ", data = " + d1 + " " + d2);
+    }
+    t = millis();
+  }
+
+  // If no MIDI IN activity, print a message every 10 seconds
+  if (millis() - t > 10000) {
+    t += 10000;
+    Serial.println("(no MIDI activity, check cables)");
+  }
+
+  // Toggle the USR LED state
+  usrLEDState = ~usrLEDState;
+  digitalWrite(usrLED, usrLEDState);
+
+}
+