int maxpix = 120;  // maximálna poloha v pixeloch
int stpx = 27;  // lineárna závislosť medzi krokmi a bodmi
int stlf = 61;  // množstvo krokov na posunutie o jeden pixelový riadok
int offset = 1;  // offset od nominálnej hodnoty
int sthm = 600;  // množstvo krokov po "homingu"
int duty = 26; // pracovný cyklus 1 pixelu

const PROGMEM byte charshape[8][415] = {
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};

byte NaTlac[120];

byte linebuf[8][120] = {
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  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
};

byte textbuf[20] = {72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 48, 49, 50, 51, 52, 53, 54, 55, 56};

const PROGMEM byte charmap[69] = {65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 46, 44, 58, 45, 42, 32};

byte infil = 0;

long step = 0;  // kroky motora tlačovej hlavy
long tarstep = 0;  // cieľová pozícia motora tlačovej hlavy
byte printpix = 0; // pixel na tlač
long pixel = 0;  // horizontálna poloha v pixeloch
byte stplnfdamnt = 0;  // relatívne množstvo krokov na posuv papiera o riadok
byte val = 0;  // hodnota čítaná z array linebuf
int toprint = 0; // má sa tlačiť? Platí len pre jeden riadok pixelov
int printdir = 0;  // smer tlače
unsigned int linfdstep = 0;  // množstvo krokov na posuv riadku
byte toarsol = 0;  // to solve array?
byte line = 8;

byte reval = 0;
byte wrval = 0;
byte rfroa = 0;

byte infin = 0;

byte lindexl = 0;  // read
unsigned int alindexcr = 0;

unsigned int alindexcw = 0;

byte rlindexc = 0;

unsigned int mpindexr = 0;  // min pixel index read

unsigned int mpindexw = 0;  // min pixel index write

byte letterindex = 0;
int letternum = 0;


void setup() {

  pinMode(2, OUTPUT);  // stepper 1 dir
  pinMode(3, OUTPUT);  // stepper 1 step
  pinMode(7, OUTPUT);  // stepper 2 dir
  pinMode(4, OUTPUT);  // stepper 2 step
  pinMode(5, OUTPUT);  // tlačiaca ihlička

  pinMode(6, INPUT_PULLUP);  // koncový kalibračný spínač
  pinMode(A1, INPUT_PULLUP);  // posuv o 5mm vpred (400 krokov)
  pinMode(A2, INPUT_PULLUP);  // posuv o 5mm dozadu (400 krokov)

  digitalWrite(7, HIGH);

  Serial.begin(9600);

  Serial.write(0x0A);  // tento riadok môžete vynechať

  // shlulls();

}

void loop() {

  if (Serial.available()) {

    infil = Serial.read();
    //Serial.println(infil);

    letternum = letternum + 1;

    if(infil == 248) {
      infil = 0;
      letternum = 0;
    }

    textbuf[letternum] = infil;
    if (infil == 10 || letternum >= 20) {
      letternum = 0;
      toarsol = 1;
    }

  }

  if (toarsol == 1) {
    while (letternum < 20) {
      infin = 0;
      while (infin <= 100) {
        reval = charmap[infin];
        wrval = textbuf[letternum];
      //  Serial.println(wrval);
        if (wrval == 10) {
          infin = 68;
          break;
        }
        if (wrval == reval) {
          letterindex = infin;
          break;
        }
        else {
          infin = infin + 1;
        Serial.println(wrval);
        }
      }
      mpindexr = 6 * letterindex;
      mpindexw = 6 * letternum;
      lindexl = 0;
      for (lindexl = 0; lindexl < 9; lindexl = lindexl + 1) {
        for (rlindexc = 0; rlindexc < 7; rlindexc = rlindexc + 1) {
          mpindexr = 6 * letterindex;
          mpindexw = 6 * letternum;
          alindexcw = mpindexw + rlindexc;
          alindexcr = mpindexr + rlindexc;
          rfroa = charshape[lindexl][alindexcr];
          linebuf[lindexl][alindexcw] = rfroa;
          //Serial.print(linebuf[lindexl][alindexcw]);
          rlindexc = rlindexc + 1;
        }
      }
      letternum = letternum + 1;
    }

    toarsol = 0;
    line = 0;
  }
if(line < 8) {
  for (int xf = 0; xf < 120; xf = xf + 1) {
    NaTlac[xf] = linebuf[line][xf];
    Serial.print(NaTlac[xf]);
    toprint = 1;
  }
}

  if (toprint == 1 && printdir == 0) {
    stepMovePrint();
  }

  if (toprint == 1 && printdir == 1) {
    stepMovePrintReverse();
  }

  if (digitalRead(A1) == LOW) {
    delay(250);
    stepMoveBlankLineForwards();
  }

  if (digitalRead(A2) == LOW) {
    delay(250);
    stepMoveBlankLineBackwards();
  }

}

void stepMovePrint() {  // tlačenie jedného riadku
  tarstep = pixel * stpx;
  digitalWrite(2, LOW);

  if (toprint == 1) {
    while (pixel <= maxpix - 1) {
      tarstep = pixel * stpx;
      val = NaTlac[pixel];
      while (tarstep > step) {
        tarstep = pixel * stpx;
        digitalWrite(3, HIGH);
        delayMicroseconds(32);
        digitalWrite(3, LOW);
        delayMicroseconds(32);

        if (tarstep - step <= duty) {
          digitalWrite(5, LOW);
        }

        else {
          digitalWrite(5, val);
        }

        step = step + 1;
      }

      if (tarstep <= step) {
        pixel = pixel + 1;
      }

    }

  }
  toprint = 0;
  digitalWrite(5, LOW);
  printdir = 1;
  stepLinefeed();
}

void stepLinefeed() {
  digitalWrite(7, HIGH);
  stplnfdamnt = stlf;

  while (stplnfdamnt >= 1) {
    digitalWrite(4, HIGH);
    delayMicroseconds(60);
    digitalWrite(4, LOW);
    delayMicroseconds(60);
    stplnfdamnt = stplnfdamnt - 1;
  }
  printpix = 0;

  for (int i = 0; i < 8; i = i + 1) {
    for (int fr = 0; fr < 120; fr = fr + 1) {
      linebuf[i][fr] = printpix;
    }
  }
  line = line + 1;
}

void stepMovePrintReverse() {  // tlačenie jedného riadku
  tarstep = pixel * stpx;
  digitalWrite(2, HIGH);

  if (toprint == 1) {
    while (pixel >= 0) {
      tarstep = pixel * stpx;
      if (pixel > -1) {
        val = NaTlac[pixel];
      }
      if (pixel == -1) {
        val = 0;
      }
      while (tarstep < step) {
        tarstep = pixel * stpx;
        digitalWrite(3, HIGH);
        delayMicroseconds(32);
        digitalWrite(3, LOW);
        delayMicroseconds(32);

        if (step - tarstep <= duty) {
          digitalWrite(5, LOW);
        }

        else {
          digitalWrite(5, val);
        }

        step = step - 1;
      }

      if (tarstep >= step) {
        pixel = pixel - 1;
      }

    }
  }
  digitalWrite(5, LOW);
  toprint = 0;
  printdir = 0;
  stepLinefeed();
}

void shlulls() {
  digitalWrite(2, HIGH);

  while (digitalRead(6) == HIGH) {
    digitalWrite(3, HIGH);
    delayMicroseconds(250);
    digitalWrite(3, LOW);
    delayMicroseconds(250);
  }

  while (step <= sthm) {
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    delayMicroseconds(250);
    digitalWrite(3, LOW);
    delayMicroseconds(250);
    step = step + 1;
  }

  tarstep = 0;
  step = 0;
  pixel = 0;
  printpix = 0;

}

void stepMoveBlankLineForwards() {
  linfdstep = stlf * 15;
  digitalWrite(7, HIGH);
  while (linfdstep > 0) {
    digitalWrite(4, HIGH);
    delayMicroseconds(60);
    digitalWrite(4, LOW);
    delayMicroseconds(60);
    linfdstep = linfdstep - 1;
  }
}

void stepMoveBlankLineBackwards() {
  linfdstep = stlf * 15;
  digitalWrite(7, LOW);
  while (linfdstep > 0) {
    digitalWrite(4, HIGH);
    delayMicroseconds(60);
    digitalWrite(4, LOW);
    delayMicroseconds(60);
    linfdstep = linfdstep - 1;
  }
}