Collidoscope

/******************************************************************************

 *  Copyright (C) 2015  Ben Bengler (mail@benbengler.com)

 *  Copyright (C) 2016  Queen Mary University of London

 *  Authors: Ben Bengler, Fiore Martin, Christopher Paton (christopher.paton@gmail.com)

 *

 *  This file is part of Collidoscope.

 *

 *  Collidoscope is free software: you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation, either version 3 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 ****************************************************************************

 *

 *  Teensy 2 ++ pinout: https://www.pjrc.com/teensy/card4b.pdf

 *

 *  ANALOG INPUTS:

 *  Wavejet   -> F0 (38) [Horizontal rail 1]

 *  Wavejet   -> F1 (39) [Horizontal rail 2]

 *  Filter 1  -> F2 (40) [Vertical rail 1]

 *  Filter 2  -> F4 (42) [Vertical rail 2]

 *

 *  DIGITAL INPUTS [INTERRUPTS]:

 *  Sel. length 1  -> INT0/INT1 (0, 1)  [Encoder 1]

 *  Sel. length 2  -> INT2/INT3 (2, 3)  [Encoder 2]

 *  Duration 1     -> INT4/INT5 (36, 37)[Encoder 3]

 *  Duration 2     -> INT6/INT7 (18, 19)[Encoder 4]

 *

 *  DIGITAL INPUTS:

 *  Play1 toggle  -> B0 (20)

 *  Record1       -> B1 (21)

 *  Play2 toggle  -> B3 (22)

 *  Record2       -> B4 (24)

 *

 *  DIGITAL OUTPUTS:

 *  Record Button 1 Led -> D4 (4)

 *  Record Button 2 Led -> D5 (5)

 *

 ******************************************************************************/

#include <Encoder.h>

#include <Bounce.h>

///////////////////////////////////////////////////

//MIDI settings

const int midi_chan_inst1 = 1; // MIDI channel for Instrument 1

const int midi_chan_inst2 = 2; // MIDI channel for Instrument 2

const int cc_length = 1;    // MIDI cc controlling selection length

const int cc_duration = 2;  // MIDI cc controlling grain duration

const int cc_filter = 7;    // MIDI cc controlling LP filter

const int cc_play = 4;      // MIDI cc controlling PLAY

const int cc_record = 5;    // MIDI cc controlling RECORD

///////////////////////////////////////////////////

// Interface Inputs

//Buttons

const int Pin_play1 = 20;       //B0

const int Pin_record1 = 21;     //B1

const int Pin_play2 = 23;       //B3

const int Pin_record2 = 24;     //B4

const int Pin_record1_led =  4; //D4

const int Pin_record2_led =  5; //D5

const int Pin_MIDIled =  6;

Bounce button1 = Bounce(Pin_play1, 5);

Bounce button2 = Bounce(Pin_record1, 5);

Bounce button3 = Bounce(Pin_play2, 5);

Bounce button4 = Bounce(Pin_record2, 5);

//Encoders

Encoder Enc1 (0, 1);  //Encoder for section length on Wavejet 1

Encoder Enc2 (2, 3);  //Encoder for section length on Wavejet 2

Encoder Enc3 (36, 37); //Encoder for duration of Wavejet 1 [granularisation effect]

Encoder Enc4 (18, 19); //Encoder for duration of Wavejet 2 [granularisation effect]

// Variables

const int jitter_thresh = 10; // threshold value for analog INs to make up for input jitter

//Store recent values to detect parameter change

long Enc1_old = -999;

long Enc2_old = -999;

long Enc3_old = -999;

long Enc4_old = -999;

uint16_t Jet1_old = 0;

int16_t Jet1_old_MIDI = -1;

uint16_t Jet2_old = 0;

int16_t Jet2_old_MIDI = -1;

uint16_t filter1_old = 0;

int16_t filter1_old_MIDI = -1;

uint16_t filter2_old = 0;

int16_t filter2_old_MIDI = -1;

uint16_t dur1_old = 0;

int16_t dur1_old_MIDI = -1;

uint16_t dur2_old = 0;

int16_t dur2_old_MIDI = -1;

void setup()

{

  pinMode(Pin_play1, INPUT_PULLUP);

  pinMode(Pin_record1, INPUT_PULLUP);

  pinMode(Pin_play2, INPUT_PULLUP);

  pinMode(Pin_record2, INPUT_PULLUP);

  pinMode(Pin_MIDIled, OUTPUT);

  pinMode(Pin_record1_led, OUTPUT);

  pinMode(Pin_record2_led, OUTPUT);

}

void loop()

{

  digitalWrite(Pin_MIDIled, LOW);

  digitalWrite(Pin_record1_led, HIGH);

  digitalWrite(Pin_record2_led, HIGH);

  button1.update();

  button2.update();

  button3.update();

  button4.update();

  uint16_t Jet1_new = analogRead(0);      //read Wavejet/Rail 1; ADJUST INPUT RANGE ACCORDING TO SENSOR

  uint16_t Jet2_new = analogRead(1);      //read Wavejet/Rail 2; ADJUST INPUT RANGE ACCORDING TO SENSOR

  uint16_t filter1_new = analogRead(2);   //read filter Instrument 1; ADJUST INPUT RANGE ACCORDING TO SENSOR

  uint16_t filter2_new = analogRead(4);   //read filter Instrument 2; ADJUST INPUT RANGE ACCORDING TO SENSOR

  uint16_t dur1_new = analogRead(3);

  uint16_t dur2_new = analogRead(5);

  //------ SEND INSTRUMENT 1 MIDI -----------

  // Play button instrument 1

  if (button1.fallingEdge()){

   usbMIDI.sendControlChange(cc_play, 1, midi_chan_inst1);

  }

  if (button1.risingEdge()){

   usbMIDI.sendControlChange(cc_play, 0, midi_chan_inst1);

  }

  // Record button instrument 1

  if (button2.fallingEdge()){

   usbMIDI.sendControlChange(cc_record, 1, midi_chan_inst1);

  }

  // Selection start position instrument 1

  // <calibrate>

  if (Jet1_new > Jet1_old+jitter_thresh || Jet1_new < Jet1_old-jitter_thresh){

    int16_t midiVal = constrain( map(Jet1_new, 994, 121, 0, 149), 0, 149 );

    if( midiVal != Jet1_old_MIDI ){

      Jet1_old_MIDI = midiVal;

      usbMIDI.sendPitchBend( midiVal, midi_chan_inst1 );

    }

    Jet1_old = Jet1_new;

    digitalWrite(Pin_MIDIled, HIGH);

  }

  //Filter instrument 1

  // <calibrate>

  if ( filter1_new != filter1_old ) {

    int16_t midiVal = constrain( map(filter1_new, 137, 734, 0, 127), 0, 127 );

    if( midiVal != filter1_old_MIDI){

      filter1_old_MIDI = midiVal;

      usbMIDI.sendControlChange(cc_filter, midiVal, midi_chan_inst1);

    }

    filter1_old = filter1_new;

    digitalWrite(Pin_MIDIled, HIGH);

  }

  //Selection length instrument 1

  long Enc1_new = Enc1.read();

  Enc1_new = constrain(Enc1_new, 0, 127); //constrain to 7-bit MIDI range

  if (Enc1_new <= 0){ //Dynamic reset of counter to MIDI range

    Enc1.write(0);

  }

  else if (Enc1_new >= 127){

    Enc1.write(127);

  }

  if (Enc1_new != Enc1_old) {

    Enc1_old = Enc1_new;

    usbMIDI.sendControlChange(cc_length, Enc1_new, midi_chan_inst1);

    digitalWrite(Pin_MIDIled, HIGH);

  }

  //Grain duration instrument 1

  long Enc3_new = Enc3.read();

  Enc3_new = constrain(Enc3_new, 0, 127); //constrain to 7-bit MIDI range

  if (Enc3_new <= 0){

    Enc3.write(0);

  }

  else if (Enc3_new >= 127){

    Enc3.write(127);

  }

  if (Enc3_new != Enc3_old) {

    Enc3_old = Enc3_new;

    usbMIDI.sendControlChange(cc_duration, Enc3_new, midi_chan_inst1);

    digitalWrite(Pin_MIDIled, HIGH);

  }

  //------ SEND INSTRUMENT 2 MIDI -----------

  //Play button instrument 2

  if (button3.fallingEdge()) {

    usbMIDI.sendControlChange(cc_play, 1, midi_chan_inst2);

  }

  if (button3.risingEdge()) {

    usbMIDI.sendControlChange(cc_play, 0, midi_chan_inst2);

  }

  //Record button instrument 2

  if (button4.fallingEdge()) {

    usbMIDI.sendControlChange(cc_record, 1, midi_chan_inst2);

  }

  // Selection start position instrument 2

  // <calibrate>

  if (Jet2_new > Jet2_old+jitter_thresh || Jet2_new < Jet2_old-jitter_thresh) {

    int16_t midiVal = constrain( map( Jet2_new, 103, 993, 149, 0 ), 0, 149 );

    if( midiVal != Jet2_old_MIDI ){

      Jet2_old_MIDI = midiVal;

      usbMIDI.sendPitchBend( midiVal, midi_chan_inst2 );

    }

    Jet2_old = Jet2_new;

    digitalWrite(Pin_MIDIled, HIGH);

  }

  //Filter instrument 2

  // <calibrate>

  if ( filter2_new != filter2_old ) {

    int16_t midiVal = constrain( map(filter2_new, 125, 684, 0, 127), 0, 127 );

    if( midiVal != filter2_old_MIDI){

      filter2_old_MIDI = midiVal;

      usbMIDI.sendControlChange(cc_filter, midiVal, midi_chan_inst2);

    }

    filter2_old = filter2_new;

    digitalWrite(Pin_MIDIled, HIGH);

  }

  //Selection length instrument 2

  long Enc2_new = Enc2.read();

  Enc2_new = constrain(Enc2_new, 0, 127); //constrain to 7-bit MIDI range

  if (Enc2_new <= 0){ //Dynamic reset of counter to MIDI range

    Enc2.write(0);

  }

  else if (Enc2_new >= 127){

    Enc2.write(127);

  }

  if (Enc2_new != Enc2_old) {

    Enc2_old = Enc2_new;

    usbMIDI.sendControlChange(cc_length, Enc2_new, midi_chan_inst2);

    digitalWrite(Pin_MIDIled, HIGH);

  }

  //Grain duration instrument 2

  long Enc4_new = Enc4.read();

  Enc4_new = constrain(Enc4_new, 0, 127); //constrain to 7-bit MIDI range

  if (Enc4_new <= 0){

    Enc4.write(0);

  }

  else if (Enc4_new >= 127){

    Enc4.write(127);

  }

  if (Enc4_new != Enc4_old) {

    Enc4_old = Enc4_new;

    usbMIDI.sendControlChange(cc_duration, Enc4_new, midi_chan_inst2);

    digitalWrite(Pin_MIDIled, HIGH);

  }

}