wav_trigger_trellis

#include <Wire.h>
#include "Adafruit_Trellis.h"   //need adafruit trellis library


String results[] = {"86420","86420","86420","86420",
  "86420","86420","86420","86420",
  "86420","86420","86420","86420",
  "86420","86420","86420","86420",};
//array of each step, keeps track of which drum tracks should play. For example, if the first digit is 8 it's off and 9 is on, sending a trigger out
// on that specific step. even numbers = off, odd numbers = on.


Adafruit_Trellis matrix0 = Adafruit_Trellis();

Adafruit_TrellisSet trellis =  Adafruit_TrellisSet(&matrix0);


int BPM = 300;
int channel;
int currentchan= 0;

#define numKeys (16)

#define INTPIN A2

void setup() {
  Serial.begin(9600);
  pinMode(A1, INPUT);  // potentiometer for BPM control

  pinMode(INTPIN, INPUT);   // INT pin requires a pullup
  digitalWrite(INTPIN, HIGH);
  pinMode(12,OUTPUT);

  for(int j=2;j<7;j++){
    pinMode(j, INPUT);   // Buttons
    digitalWrite(j, HIGH);
  }

  for(int j=7;j<12;j++){
    pinMode(j, OUTPUT);   // Ouput LEDS, triggers Wav_Trigger with 5v pulse

  }





  trellis.begin(0x70);    // begin() with the addresses of each panel in order


  // light up all the LEDs in order
  for (uint8_t i=0; i<numKeys; i++) {
    trellis.setLED(i);
    trellis.writeDisplay();
    delay(50);
  }
  // then turn them off
  for (uint8_t i=0; i<numKeys; i++) {
    trellis.clrLED(i);
    trellis.writeDisplay();
    delay(50);
  }




}


void loop() {


  for (uint8_t i=0; i<numKeys; i++) {
    int BPM= analogRead(A1);
    BPM =  map(BPM, 0, 1023, 400, 100);
   // int BPMdisplay= (60000 /BPM);



    //Serial.println(BPMdisplay);



    for(int b=2;b<7;b++){
      if (digitalRead(b) == LOW){   //change channels
        channel = b - 1;


        if ((digitalRead(2) == LOW) && (digitalRead(6)== LOW)){  //reset all paterns on each channel when these 2 buttons are held down together
          for (int r=0;r<16;r++){
            results[r]= "86420";
            trellis.clrLED(r);
            trellis.writeDisplay();
          }

          for (uint8_t i=0; i<numKeys; i++) {
            trellis.setLED(i);
            trellis.writeDisplay();
            delay(20);
          }
          // then turn them off
          for (uint8_t i=0; i<numKeys; i++) {
            trellis.clrLED(i);
            trellis.writeDisplay();
            delay(20);
          }

        }
        break;
      }
    }

    if(currentchan != channel){   //clear current board LEDs so you can input steps on a different channel
      for (uint8_t i=0; i<numKeys; i++) {


        trellis.clrLED(i);
        trellis.writeDisplay();

      }
      currentchan = channel;

      if (currentchan == 1){
        for (uint8_t i=0; i<numKeys; i++) {

          if(results[i].indexOf('9') > -1){
            trellis.setLED(i);
            trellis.writeDisplay();
          }


        }

      }

      if (currentchan == 2){
        for (uint8_t i=0; i<numKeys; i++) {

          if(results[i].indexOf('7') > -1){
            trellis.setLED(i);
            trellis.writeDisplay();
          }


        }

      }
      if (currentchan == 3){
        for (uint8_t i=0; i<numKeys; i++) {

          if(results[i].indexOf('5') > -1){
            trellis.setLED(i);
            trellis.writeDisplay();
          }


        }

      }

      if (currentchan == 4){
        for (uint8_t i=0; i<numKeys; i++) {

          if(results[i].indexOf('3') > -1){
            trellis.setLED(i);
            trellis.writeDisplay();
          }


        }

      }
      if (currentchan == 5){
        for (uint8_t i=0; i<numKeys; i++) {

          if(results[i].indexOf('1') > -1){
            trellis.setLED(i);
            trellis.writeDisplay();
          }


        }

      }

    }


    BlinkPattern(i,currentchan,BPM);
    if (trellis.readSwitches()) {  // If a button was just pressed or released...
      for (uint8_t i=0; i<numKeys; i++) {     // go through every button
        if (trellis.justPressed(i)) {         // if it was pressed...


          if (trellis.isLED(i)){ // Alternate the LED
            trellis.clrLED(i);

            if (currentchan == 1){
              if(results[i].indexOf('9') > -1){ //If Button is activated, array is changed
                results[i].replace('9','8');
              }
            }
            if (currentchan == 2){
              if(results[i].indexOf('7') > -1){ //If Button is activated, array is changed
                results[i].replace('7','6');
              }
            }

            if (currentchan == 3){
              if(results[i].indexOf('5') > -1){ //If Button is activated, array is changed
                results[i].replace('5','4');
              }
            }
            if (currentchan == 4){
              if(results[i].indexOf('3') > -1){ //If Button is activated, array is changed
                results[i].replace('3','2');
              }
            }

            if (currentchan == 5){
              if(results[i].indexOf('1') > -1){ //If Button is activated, array is changed
                results[i].replace('1','0');
              }
            }
          }
          else{

            if (currentchan == 1){
              trellis.setLED(i);              //Array value changed to default if button not activated
              if(results[i].indexOf('8') > -1){
                results[i].replace('8','9');
              }
            }

            if (currentchan == 2){
              trellis.setLED(i);              //Array value changed to default if button not activated
              if(results[i].indexOf('6') > -1){
                results[i].replace('6','7');
              }
            }

            if (currentchan == 3){
              trellis.setLED(i);              //Array value changed to default if button not activated
              if(results[i].indexOf('4') > -1){
                results[i].replace('4','5');
              }
            }

            if (currentchan == 4){
              trellis.setLED(i);              //Array value changed to default if button not activated
              if(results[i].indexOf('2') > -1){
                results[i].replace('2','3');
              }
            }


            if (currentchan == 5){
              trellis.setLED(i);              //Array value changed to default if button not activated
              if(results[i].indexOf('0') > -1){
                results[i].replace('0','1');
              }
            }

          }
        }
      }
      trellis.writeDisplay(); // tell the trellis to set the LEDs we requested
    }
  }

//  PrintArray();
}

void BlinkPattern(uint8_t i, int channel, int BPM)
{

  if (trellis.isLED(i)== 1){
    trellis.clrLED(i);
    trellis.writeDisplay();
    int counter = Outputs(i);
 delay((BPM/4)-counter);

 //   digitalWrite(pinON, LOW);

    trellis.setLED(i);
    trellis.writeDisplay();

    delay((BPM *3)/4);

  }



  else{
    int counter = Outputs(i);
    trellis.setLED(i);
    trellis.writeDisplay();
    delay((BPM/2)-counter);

    trellis.clrLED(i);
    trellis.writeDisplay();
    delay(BPM/2);
    // digitalWrite(pinON, LOW);
  }


}

void PrintArray(){ // for testing purposes
  Serial.println("Array");
  for (int i =0; i< 4; i++) Serial.println(results[i]);
  Serial.println(" ");
  for (int i =4; i< 8; i++) Serial.println(results[i]);
  Serial.println(" ");
  for (int i =8; i< 12; i++) Serial.println(results[i]);
  Serial.println(" ");
  for (int i =12; i<16 ; i++) Serial.println(results[i]);
  Serial.println(" ");

}

int Outputs(uint8_t i){  //checks array for each step and if the digit is odd, fires off a trigger pulse.
  int counter = 0;
  if(results[i].indexOf('9') > -1){  //Output
    digitalWrite(7, HIGH);

    delay(10);

    digitalWrite(7, LOW);
    counter = counter + 10;
  }

  if(results[i].indexOf('7') > -1){  //Output
    digitalWrite(8, HIGH);

   delay(10);
     digitalWrite(8, LOW);
    counter = counter + 10;
  }

  if(results[i].indexOf('5') > -1){  //Output
    digitalWrite(9, HIGH);


   delay(10);
    digitalWrite(9, LOW);
   counter = counter + 10;


  }
  if(results[i].indexOf('3') > -1){  //Output
    digitalWrite(10, HIGH);
  delay(10);

     digitalWrite(10, LOW);
    counter = counter + 10;
  }

  if(results[i].indexOf('1') > -1){  //Output
    digitalWrite(11, HIGH);
  delay(10);
     digitalWrite(11, LOW);

    counter = counter + 10;
  }


  return counter;
}