forked from wirtz/BALibrary
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
191 lines
5.9 KiB
191 lines
5.9 KiB
/*************************************************************************
|
|
* This demo uses the BALibrary library to provide enhanced control of
|
|
* the TGA Pro board.
|
|
*
|
|
* The latest copy of the BA Guitar library can be obtained from
|
|
* https://github.com/Blackaddr/BALibrary
|
|
*
|
|
* This demo will provide an audio passthrough, as well as exercise the
|
|
* MIDI interface.
|
|
*
|
|
* It can optionally exercise the SPI MEM0 if installed on the TGA Pro board.
|
|
*
|
|
*/
|
|
#include <Wire.h>
|
|
#include <Audio.h>
|
|
#include <MIDI.h>
|
|
#include <SPI.h>
|
|
#include "BALibrary.h"
|
|
|
|
#include <midi_UsbTransport.h>
|
|
static const unsigned sUsbTransportBufferSize = 16;
|
|
typedef midi::UsbTransport<sUsbTransportBufferSize> UsbTransport;
|
|
|
|
UsbTransport sUsbTransport;
|
|
|
|
MIDI_CREATE_INSTANCE(UsbTransport, sUsbTransport, uMIDI);
|
|
|
|
|
|
MIDI_CREATE_DEFAULT_INSTANCE();
|
|
using namespace midi;
|
|
|
|
using namespace BAEffects;
|
|
|
|
#define MIDI_DEBUG
|
|
|
|
using namespace BALibrary;
|
|
|
|
AudioInputI2S i2sIn;
|
|
AudioOutputI2S i2sOut;
|
|
BAAudioControlWM8731 codec;
|
|
|
|
// External SRAM is required for this effect due to the very long
|
|
// delays required.
|
|
ExternalSramManager externalSram;
|
|
ExtMemSlot delaySlot; // Declare an external memory slot.
|
|
|
|
AudioEffectSOS sos(&delaySlot);
|
|
|
|
// Add some effects for our soloing channel
|
|
AudioEffectDelay delayModule; // we'll add a little slapback echo
|
|
AudioMixer4 gainModule; // This will be used simply to reduce the gain before the reverb
|
|
AudioEffectReverb reverb; // Add a bit of 'verb to our tone
|
|
AudioFilterBiquad cabFilter; // We'll want something to cut out the highs and smooth the tone, just like a guitar cab.
|
|
AudioMixer4 mixer;
|
|
|
|
// Connect the input
|
|
AudioConnection inputToSos(i2sIn, 0, sos, 0);
|
|
AudioConnection inputToSolo(i2sIn, 0, delayModule, 0);
|
|
|
|
// Patch cables for the SOLO channel
|
|
AudioConnection inputToGain(delayModule, 0, gainModule, 0);
|
|
AudioConnection inputToReverb(gainModule, 0, reverb, 0);
|
|
|
|
// Output Mixer
|
|
AudioConnection mixer0input(i2sIn, 0, mixer, 0); // SOLO Dry Channel
|
|
AudioConnection mixer1input(reverb, 0, mixer, 1); // SOLO Wet Channel
|
|
AudioConnection mixer2input(sos, 0, mixer, 2); // SOS Channel
|
|
AudioConnection inputToCab(mixer, 0, cabFilter, 0);
|
|
|
|
// CODEC Outputs
|
|
AudioConnection outputLeft(cabFilter, 0, i2sOut, 0);
|
|
AudioConnection outputRight(cabFilter, 0, i2sOut, 1);
|
|
|
|
int loopCount = 0;
|
|
|
|
void OnControlChange(byte channel, byte control, byte value) {
|
|
sos.processMidi(channel-1, control, value);
|
|
#ifdef MIDI_DEBUG
|
|
Serial.print("Control Change, ch=");
|
|
Serial.print(channel, DEC);
|
|
Serial.print(", control=");
|
|
Serial.print(control, DEC);
|
|
Serial.print(", value=");
|
|
Serial.print(value, DEC);
|
|
Serial.println();
|
|
#endif
|
|
}
|
|
|
|
void setup() {
|
|
|
|
delay(100);
|
|
Serial.begin(57600); // Start the serial port
|
|
|
|
// Disable the codec first
|
|
codec.disable();
|
|
delay(100);
|
|
AudioMemory(128);
|
|
delay(5);
|
|
|
|
// Enable the codec
|
|
Serial.println("Enabling codec...\n");
|
|
codec.enable();
|
|
delay(100);
|
|
|
|
// We have to request memory be allocated to our slot.
|
|
externalSram.requestMemory(&delaySlot, SPI_MEM0_SIZE_BYTES, MemSelect::MEM0, true);
|
|
//externalSram.requestMemory(&delaySlot, 50.0f, MemSelect::MEM0, true);
|
|
|
|
// Setup MIDI
|
|
MIDI.begin(MIDI_CHANNEL_OMNI);
|
|
MIDI.setHandleControlChange(OnControlChange);
|
|
uMIDI.begin(MIDI_CHANNEL_OMNI);
|
|
uMIDI.setHandleControlChange(OnControlChange);
|
|
|
|
// Configure the LED to indicate the gate status
|
|
sos.setGateLedGpio(USR_LED_ID);
|
|
|
|
// Configure which MIDI CC's will control the effect parameters
|
|
sos.mapMidiControl(AudioEffectSOS::BYPASS,16);
|
|
sos.mapMidiControl(AudioEffectSOS::CLEAR_FEEDBACK_TRIGGER,22);
|
|
sos.mapMidiControl(AudioEffectSOS::GATE_TRIGGER,23);
|
|
sos.mapMidiControl(AudioEffectSOS::GATE_OPEN_TIME,20);
|
|
sos.mapMidiControl(AudioEffectSOS::GATE_CLOSE_TIME,21);
|
|
sos.mapMidiControl(AudioEffectSOS::FEEDBACK,24);
|
|
sos.mapMidiControl(AudioEffectSOS::VOLUME,17);
|
|
|
|
// Besure to enable the delay. When disabled, audio is is completely blocked
|
|
// to minimize resources to nearly zero.
|
|
sos.enable();
|
|
|
|
// Set some default values.
|
|
// These can be changed by sending MIDI CC messages over the USB using
|
|
// the BAMidiTester application.
|
|
sos.bypass(false);
|
|
sos.gateOpenTime(3000.0f);
|
|
sos.gateCloseTime(1000.0f);
|
|
sos.feedback(0.9f);
|
|
|
|
// Setup effects on the SOLO channel
|
|
gainModule.gain(0, 0.25); // the reverb unit clips easily if the input is too high
|
|
delayModule.delay(0, 50.0f); // 50 ms slapback delay
|
|
|
|
// Setup 2-stages of LPF, cutoff 4500 Hz, Q-factor 0.7071 (a 'normal' Q-factor)
|
|
cabFilter.setLowpass(0, 4500, .7071);
|
|
cabFilter.setLowpass(1, 4500, .7071);
|
|
|
|
// Setup the Mixer
|
|
mixer.gain(0, 0.5f); // SOLO Dry gain
|
|
mixer.gain(1, 0.5f); // SOLO Wet gain
|
|
mixer.gain(1, 1.0f); // SOS gain
|
|
|
|
}
|
|
|
|
|
|
|
|
void loop() {
|
|
// usbMIDI.read() needs to be called rapidly from loop(). When
|
|
// each MIDI messages arrives, it return true. The message must
|
|
// be fully processed before usbMIDI.read() is called again.
|
|
|
|
if (loopCount % 524288 == 0) {
|
|
Serial.print("Processor Usage, Total: "); Serial.print(AudioProcessorUsage());
|
|
Serial.print("% ");
|
|
Serial.print(" sos: "); Serial.print(sos.processorUsage());
|
|
Serial.println("%");
|
|
}
|
|
loopCount++;
|
|
|
|
MIDI.read();
|
|
uMIDI.read();
|
|
|
|
// // check for new MIDI from USB
|
|
// if (usbMIDI.read()) {
|
|
// // this code entered only if new MIDI received
|
|
// byte type, channel, data1, data2, cable;
|
|
// type = usbMIDI.getType(); // which MIDI message, 128-255
|
|
// channel = usbMIDI.getChannel(); // which MIDI channel, 1-16
|
|
// data1 = usbMIDI.getData1(); // first data byte of message, 0-127
|
|
// data2 = usbMIDI.getData2(); // second data byte of message, 0-127
|
|
// Serial.println(String("Received a MIDI message on channel ") + channel);
|
|
//
|
|
// if (type == MidiType::ControlChange) {
|
|
// // if type is 3, it's a CC MIDI Message
|
|
// // Note: the Arduino MIDI library encodes channels as 1-16 instead
|
|
// // of 0 to 15 as it should, so we must subtract one.
|
|
// OnControlChange(channel-1, data1, data2);
|
|
// }
|
|
// }
|
|
|
|
}
|
|
|
|
|