Make sketch shorter, simply

Projects Programming
6

-dev:
Arguments to functions are a wonderful thing!

void mp3Bank( int bank )

{
  int val    = analogRead( btns );
  int button = valToButton( val );

lcd.print( F("MP3 bank ") ); // F macro around double-quoted string constants saves RAM
  lcd.print( bank );

if (button > 0) {
    myDFPlayer.playFolder( bank,  button );
    lcd.setCursor(0, 4);
    lcd.print( F("Playing: Sound ") );
    lcd.print( button );
  } else {
    lcd.print( F("Invalid button") );
  }
}

const int minButtonVal[] = { 400, 445, 480, 520, 570, 630, 700, 800, 900 };
const int arraySize = sizeof(minButtonVal) / sizeof( minButtonVal[0] ); //  always works, even if you change the array above

int valToButton( uint16_t val )
{
  for (int i=0; i<arraySize; i++) {
    if (val <= minButtonValue[ i ]) {
      return i;
    }
  }

// Too big!
  return 0;
}



Then call this:

mp3Bank( 2 );




... instead of this:

mp3Bank2();




Etc.

Also notice how an array is "searched" for the analog value range for each button. It returns 0 when the value is too small (less than 400) or too big (greater than 900). You can add other values to the array, and the `arraySize` variable will "calculate" how many elements you are declaring.

(tee hee, BulldogLowell)

Okay, i try this but get a error:
'minButtonVal' was not declared in this scope