Steve Lascos
6 years ago
parent
90441b5668
commit
ba4f138d4c
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/*************************************************************************
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* This demo uses the BAGuitar library to provide enhanced control of |
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* the TGA Pro board. |
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*
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* The latest copy of the BA Guitar library can be obtained from |
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* https://github.com/Blackaddr/BAGuitar
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*
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* This demo will provide an audio passthrough, as well as exercise the |
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* MIDI interface. |
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*
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* It can optionally exercise the SPI MEM0 if installed on the TGA Pro board. |
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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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#include <SPI.h> |
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#include "BAGuitar.h" |
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#include <midi_UsbTransport.h> |
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static const unsigned sUsbTransportBufferSize = 16; |
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typedef midi::UsbTransport<sUsbTransportBufferSize> UsbTransport; |
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UsbTransport sUsbTransport; |
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MIDI_CREATE_INSTANCE(UsbTransport, sUsbTransport, uMIDI); |
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MIDI_CREATE_DEFAULT_INSTANCE(); |
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using namespace midi; |
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using namespace BAEffects; |
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#define MIDI_DEBUG |
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using namespace BALibrary; |
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AudioInputI2S i2sIn; |
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AudioOutputI2S i2sOut; |
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BAAudioControlWM8731 codec; |
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// External SRAM is required for this effect due to the very long
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// delays required.
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ExternalSramManager externalSram; |
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ExtMemSlot delaySlot; // Declare an external memory slot.
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AudioEffectSOS sos(&delaySlot); |
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// Add some effects for our soloing channel
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AudioEffectDelay delayModule; // we'll add a little slapback echo
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AudioMixer4 gainModule; // This will be used simply to reduce the gain before the reverb
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AudioEffectReverb reverb; // Add a bit of 'verb to our tone
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AudioFilterBiquad cabFilter; // We'll want something to cut out the highs and smooth the tone, just like a guitar cab.
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AudioMixer4 mixer; |
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// Connect the input
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AudioConnection inputToSos(i2sIn, 0, sos, 0); |
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AudioConnection inputToSolo(i2sIn, 0, delayModule, 0); |
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// Patch cables for the SOLO channel
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AudioConnection inputToGain(delayModule, 0, gainModule, 0); |
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AudioConnection inputToReverb(gainModule, 0, reverb, 0); |
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// Output Mixer
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AudioConnection mixer0input(i2sIn, 0, mixer, 0); // SOLO Dry Channel
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AudioConnection mixer1input(reverb, 0, mixer, 1); // SOLO Wet Channel
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AudioConnection mixer2input(sos, 0, mixer, 2); // SOS Channel
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AudioConnection inputToCab(mixer, 0, cabFilter, 0); |
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// CODEC Outputs
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AudioConnection outputLeft(cabFilter, 0, i2sOut, 0); |
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AudioConnection outputRight(cabFilter, 0, i2sOut, 1); |
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int loopCount = 0; |
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void OnControlChange(byte channel, byte control, byte value) { |
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sos.processMidi(channel-1, control, value); |
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#ifdef MIDI_DEBUG |
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Serial.print("Control Change, ch="); |
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Serial.print(channel, DEC); |
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Serial.print(", control="); |
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Serial.print(control, DEC); |
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Serial.print(", value="); |
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Serial.print(value, DEC); |
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Serial.println(); |
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#endif |
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} |
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void setup() { |
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delay(100); |
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Serial.begin(57600); // Start the serial port
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// Disable the codec first
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codec.disable(); |
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delay(100); |
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AudioMemory(128); |
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delay(5); |
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// Enable the codec
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Serial.println("Enabling codec...\n"); |
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codec.enable(); |
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delay(100); |
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// We have to request memory be allocated to our slot.
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externalSram.requestMemory(&delaySlot, SPI_MEM0_SIZE_BYTES, MemSelect::MEM0, true); |
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//externalSram.requestMemory(&delaySlot, 50.0f, MemSelect::MEM0, true);
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// Setup MIDI
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MIDI.begin(MIDI_CHANNEL_OMNI); |
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MIDI.setHandleControlChange(OnControlChange); |
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uMIDI.begin(MIDI_CHANNEL_OMNI); |
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uMIDI.setHandleControlChange(OnControlChange); |
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// Configure the LED to indicate the gate status
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sos.setGateLedGpio(USR_LED_ID); |
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// Configure which MIDI CC's will control the effect parameters
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sos.mapMidiControl(AudioEffectSOS::BYPASS,16); |
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sos.mapMidiControl(AudioEffectSOS::CLEAR_FEEDBACK_TRIGGER,22); |
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sos.mapMidiControl(AudioEffectSOS::GATE_TRIGGER,23); |
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sos.mapMidiControl(AudioEffectSOS::GATE_OPEN_TIME,20); |
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sos.mapMidiControl(AudioEffectSOS::GATE_CLOSE_TIME,21); |
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sos.mapMidiControl(AudioEffectSOS::FEEDBACK,24); |
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sos.mapMidiControl(AudioEffectSOS::VOLUME,17); |
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// Besure to enable the delay. When disabled, audio is is completely blocked
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// to minimize resources to nearly zero.
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sos.enable();
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// Set some default values.
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// These can be changed by sending MIDI CC messages over the USB using
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// the BAMidiTester application.
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sos.bypass(false); |
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sos.gateOpenTime(3000.0f); |
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sos.gateCloseTime(1000.0f); |
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sos.feedback(0.9f); |
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// Setup effects on the SOLO channel
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gainModule.gain(0, 0.25); // the reverb unit clips easily if the input is too high
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delayModule.delay(0, 50.0f); // 50 ms slapback delay
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// Setup 2-stages of LPF, cutoff 4500 Hz, Q-factor 0.7071 (a 'normal' Q-factor)
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cabFilter.setLowpass(0, 4500, .7071); |
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cabFilter.setLowpass(1, 4500, .7071); |
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// Setup the Mixer
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mixer.gain(0, 0.5f); // SOLO Dry gain
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mixer.gain(1, 0.5f); // SOLO Wet gain
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mixer.gain(1, 1.0f); // SOS gain
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} |
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void loop() { |
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// usbMIDI.read() needs to be called rapidly from loop(). When
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// each MIDI messages arrives, it return true. The message must
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// be fully processed before usbMIDI.read() is called again.
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if (loopCount % 524288 == 0) { |
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Serial.print("Processor Usage, Total: "); Serial.print(AudioProcessorUsage()); |
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Serial.print("% "); |
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Serial.print(" sos: "); Serial.print(sos.processorUsage()); |
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Serial.println("%"); |
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} |
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loopCount++; |
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MIDI.read(); |
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uMIDI.read(); |
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// // check for new MIDI from USB
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// if (usbMIDI.read()) {
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// // this code entered only if new MIDI received
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// byte type, channel, data1, data2, cable;
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// type = usbMIDI.getType(); // which MIDI message, 128-255
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// channel = usbMIDI.getChannel(); // which MIDI channel, 1-16
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// data1 = usbMIDI.getData1(); // first data byte of message, 0-127
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// data2 = usbMIDI.getData2(); // second data byte of message, 0-127
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// Serial.println(String("Received a MIDI message on channel ") + channel);
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//
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// if (type == MidiType::ControlChange) {
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// // if type is 3, it's a CC MIDI Message
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// // Note: the Arduino MIDI library encodes channels as 1-16 instead
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// // of 0 to 15 as it should, so we must subtract one.
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// OnControlChange(channel-1, data1, data2);
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// }
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// }
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} |
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@ -0,0 +1,19 @@ |
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// To give your project a unique name, this code must be
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// placed into a .c file (its own tab). It can not be in
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// a .cpp file or your main sketch (the .ino file).
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#include "usb_names.h" |
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// Edit these lines to create your own name. The length must
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// match the number of characters in your custom name.
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#define MIDI_NAME {'B','l','a','c','k','a','d','d','r',' ','A','u','d','i','o',' ','T','G','A',' ','P','r','o'} |
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#define MIDI_NAME_LEN 23 |
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// Do not change this part. This exact format is required by USB.
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struct usb_string_descriptor_struct usb_string_product_name = { |
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2 + MIDI_NAME_LEN * 2, |
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3, |
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MIDI_NAME |
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}; |
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