#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);   // Initialisierung abgeschrieben !

#define Enc_A_Out 11         // Encoder Spur-A Ausgang low  => on
#define Enc_B_Out 12         // Encoder Spur-B Ausgang npn-System

volatile byte gray_fake_counter = 0;
volatile boolean gray_fake_out_0 = 0;    // Bit-0 in gray_fake_counter
volatile boolean gray_fake_in_1 = 0;     // Bit-1 in gray_fake_counter

volatile byte bin_fake_counter = 0;
volatile boolean bin_fake_in_0 = 0;      // Bit-0 in bin_fake_counter
volatile boolean bin_fake_1 = 0;         // Bit-1 in bin_fake_counter

unsigned long actualtime;
unsigned long difftime;


void setup() {
  // Initialize LCD
  lcd.init();
  lcd.backlight();

  // Initialize encoder pins and Outputs
  pinMode(Enc_A_Out, OUTPUT);
  pinMode(Enc_B_Out, OUTPUT);


}

void convert_gray_to_dez () {
  gray_in_0 = digitalRead(ENCODER_A);           // Eingangsbits vom Encoder lesen und damit "gray_in_counter" Bit 0 u. 1 laden
  gray_in_1 = digitalRead(ENCODER_B);

  bitWrite(gray_in_counter, 0, gray_in_0);       // gray_in_counter mit Bit 0 und Bit-1 laden
  bitWrite(gray_in_counter, 1, gray_in_1);

  // Gray to Bin -- "gray_in_counter" in "bin_in_counter" umwandeln

  bin_in_1 = gray_in_1;                          // bin Bit-1 = gray Bit-1, 1 zu 1 kopieren

  bin_in_0 = ( bin_in_1 ^ gray_in_0 );              // bin Bit-0 = bin Bit-1 EXOR gray Bit-0 !!!

  bitWrite(bin_in_counter, 0, bin_in_0);       // bin_in_counter mit Bit 0 und Bit-1 laden
  bitWrite(bin_in_counter, 1, bin_in_1);

  digitalWrite(Enc_A_Out, ! gray_in_0);           // Encoder Spur-A und B über LED anzeigen
  digitalWrite(Enc_B_Out, ! gray_in_1);           // LED leuchtet bei Encoder = 0 !!!

}


void loop() {

  convert_gray_to_dez ();

  if (old_counter != counter) {
    old_counter = counter;
    //    lcdputzen();
  }


  lcd.print("g_i_c 1 0:");

  lcd.print( gray_in_counter );
  lcd.print(" ");
  lcd.print( gray_in_1 );
  lcd.print( gray_in_0 );

  lcd.setCursor(0, 1);

  lcd.print( "b_i_c 1 0:" );
  lcd.print( bin_in_counter );
  lcd.print(" ");
  lcd.print( bin_in_1 );
  lcd.print( bin_in_0 );




}