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