Pawntatonic

#include <MIDI.h>
#include <midi_Defs.h>
#include <midi_Message.h>
#include <midi_Namespace.h>
#include <midi_Settings.h>
#include <Oscil.h> // oscillator template
#include <tables/sin2048_int8.h> // sine table for oscillator

#include <LiquidCrystal.h>
#include "pitches.h"


// 2-dimensional array of row pin numbers:
const int row[8] = {53,51,47,45,41,37,33,29};

// 2-dimensional array of column pin numbers:
const int col[8] ={ 22,26,30,34,38,42,46,50 };

// 2-dimensional array of pixels:
//int pixels[8][8];

int currentStep = 0;

int poti = A1;
//set beats per minute
int bpm = 200;

//set scale
int changeScale = A2;
int isPent = 0;

void setup() {

  Serial.begin(31250);

  // initialize the I/O pins as outputs
  // iterate over the pins:
  for (int thisPin = 0; thisPin < 8; thisPin++) {

    // initialize output and input pins:
    pinMode(col[thisPin], OUTPUT);
    pinMode(row[thisPin], INPUT);

    //switch for scales
    pinMode(changeScale, INPUT);

    //Fields off:
    digitalWrite(col[thisPin], LOW);
  }
}

void loop() {

  currentStep = (currentStep + 1) % 8;

  // Aktuelle Spalte unter Strom setzen
  for (int c = 0; c < 8; c++) {
    if (c == currentStep)
      digitalWrite(col[c], HIGH);
    else
      digitalWrite(col[c], LOW);
  }

  // delay von 1-5
  delay(5);

  //Serial.print(currentStep);
  //Serial.print(":\t");

  for (int r = 0; r < 8; r++) {
    int v = digitalRead(row[r]);
    if (v == HIGH) {
      //Serial.print("X");
      playTone(r);
     }
    else {
      //Serial.print(".");
    }

    //pixels[x][y] = v;
  }
  //Serial.println();
  delay(readPoti());

  //audioHook();
}

void playTone(int height){
   //play tone
   //1 = highest
   //8 = lowest
   int mytone;
   int miditone;

   isPent = (digitalRead(changeScale));

   //Serial.println(switchState);

   if(isPent == 1){
    //use pentatonic scale
     switch(height){
       case 0:
         mytone = NOTE_C4;
         miditone = 72;
         break;
        case 1:
         mytone = NOTE_D4;
         miditone = 74;
         break;
         case 2:
         mytone = NOTE_E4;
         miditone = 76;
         break;
        case 3:
         mytone = NOTE_G4;
         miditone = 79;
         break;
        case 4:
         mytone = NOTE_A4;
         miditone = 81;
         break;
        case 5:
         mytone = NOTE_C5;
         miditone = 84;
         break;
           case 6:
         mytone = NOTE_D5;
         miditone = 86;
         break;
        case 7:
         mytone = NOTE_E5;
         miditone = 88;
         break;
     }
   }
   else {
    //use major scale
     switch(height){
       case 0:
         mytone = NOTE_C4;
         miditone = 72;
         break;
        case 1:
         mytone = NOTE_D4;
         miditone = 74;
         break;
           case 2:
         mytone = NOTE_E4;
         miditone = 76;
         break;
        case 3:
         mytone = NOTE_F4;
         miditone = 77;
         break;
        case 4:
         mytone = NOTE_G4;
         miditone = 79;
         break;
        case 5:
         mytone = NOTE_A4;
         miditone = 81;
         break;
           case 6:
         mytone = NOTE_B4;
         miditone = 83;
         break;
        case 7:
         mytone = NOTE_C5;
         miditone = 84;
         break;
     }
   }

   tone(52, mytone);
   noteOn(0x90,miditone,0x7f);

   delay(50);

   noTone(52);

}

//send midi to output
void noteOn(int cmd, int pitch, int velocity) {
  Serial.write(cmd);
  Serial.write(pitch);
  Serial.write(velocity);
}

//read from poti to set speed
int readPoti() {
  // set bpm
  int src = analogRead(poti);

  bpm = src;
  //Serial.print(bpm);

  //optional: transform to bmp

  return bpm;
}