uint8_t buf[8] = {
0 }; /* Keyboard report buffer */

#define KEY_P1_UP       0x52
#define KEY_P1_DOWN     0x51
#define KEY_P1_LEFT     0x50
#define KEY_P1_RIGHT    0x4f
#define KEY_P1_LCTRL    0xe0
#define KEY_P1_ALT      0xe2
#define KEY_P1_SPACE    0x2c
#define KEY_P1_LSHIFT   0xe1
#define KEY_P1_Z        0x1d
#define KEY_P1_X        0x1b
#define KEY_P1_5        0x22
#define KEY_P1_1        0x1e

#define KEY_P2_R        0x15
#define KEY_P2_F        0x09
#define KEY_P2_D        0x07
#define KEY_P2_G        0x0a
#define KEY_P2_A        0x04
#define KEY_P2_S        0x16
#define KEY_P2_Q        0x14
#define KEY_P2_W        0x1a
#define KEY_P2_I        0x0c
#define KEY_P2_K        0x0e
#define KEY_P2_6        0x23
#define KEY_P2_2        0x1f


#define KEY_VOLUP       0x57
#define KEY_VOLDOWN     0x56
#define KEY_F7          0x40
#define KEY_F8          0x41
#define KEY_ENTER       0x28
#define KEY_ESC         0x29
#define KEY_P           0x13
#define KEY_TAB         0x2b


#define PIN_P1_UP      30
#define PIN_P1_DOWN    31
#define PIN_P1_LEFT    32
#define PIN_P1_RIGHT   33
#define PIN_P1_LCTRL   34
#define PIN_P1_ALT     35
#define PIN_P1_SPACE   36
#define PIN_P1_LSHIFT  37
#define PIN_P1_Z       38
#define PIN_P1_X       39
#define PIN_P1_5       40
#define PIN_P1_1       41

#define PIN_P2_R       42
#define PIN_P2_F       43
#define PIN_P2_D       44
#define PIN_P2_G       45
#define PIN_P2_A       46
#define PIN_P2_S       47
#define PIN_P2_Q       48
#define PIN_P2_W       49
#define PIN_P2_I       50
#define PIN_P2_K       51
#define PIN_P2_6       52
#define PIN_P2_2       53

int state = 1;

void setup()
{
  Serial.begin(9600);
  randomSeed(analogRead(0));
  delay(200);

  pinMode(PIN_P1_UP, INPUT);
  pinMode(PIN_P1_DOWN, INPUT);
  pinMode(PIN_P1_LEFT, INPUT);
  pinMode(PIN_P1_RIGHT, INPUT);
  pinMode(PIN_P1_LCTRL, INPUT);
  pinMode(PIN_P1_ALT, INPUT);
  pinMode(PIN_P1_SPACE, INPUT);
  pinMode(PIN_P1_LSHIFT, INPUT);
  pinMode(PIN_P1_Z, INPUT);
  pinMode(PIN_P1_X, INPUT);
  pinMode(PIN_P1_5, INPUT);
  pinMode(PIN_P1_1, INPUT);

  pinMode(PIN_P2_R, INPUT);
  pinMode(PIN_P2_F, INPUT);
  pinMode(PIN_P2_D, INPUT);
  pinMode(PIN_P2_G, INPUT);
  pinMode(PIN_P2_A, INPUT);
  pinMode(PIN_P2_S, INPUT);
  pinMode(PIN_P2_Q, INPUT);
  pinMode(PIN_P2_W, INPUT);
  pinMode(PIN_P2_I, INPUT);
  pinMode(PIN_P2_K, INPUT);
  pinMode(PIN_P2_6, INPUT);
  pinMode(PIN_P2_2, INPUT);


  digitalWrite(PIN_P1_UP, 1);
  digitalWrite(PIN_P1_DOWN, 1);
  digitalWrite(PIN_P1_LEFT, 1);
  digitalWrite(PIN_P1_RIGHT, 1);
  digitalWrite(PIN_P1_LCTRL, 1);
  digitalWrite(PIN_P1_ALT, 1);
  digitalWrite(PIN_P1_SPACE, 1);
  digitalWrite(PIN_P1_LSHIFT, 1);
  digitalWrite(PIN_P1_Z, 1);
  digitalWrite(PIN_P1_X, 1);
  digitalWrite(PIN_P1_5, 1);
  digitalWrite(PIN_P1_1, 1);

  digitalWrite(PIN_P2_R, 1);
  digitalWrite(PIN_P2_F, 1);
  digitalWrite(PIN_P2_D, 1);
  digitalWrite(PIN_P2_G, 1);
  digitalWrite(PIN_P2_A, 1);
  digitalWrite(PIN_P2_S, 1);
  digitalWrite(PIN_P2_Q, 1);
  digitalWrite(PIN_P2_W, 1);
  digitalWrite(PIN_P2_I, 1);
  digitalWrite(PIN_P2_K, 1);
  digitalWrite(PIN_P2_6, 1);
  digitalWrite(PIN_P2_2, 1);
}

void loop()
{


  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_UP) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_VOLUP;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }

  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_DOWN) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_VOLDOWN;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }

  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_LEFT) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_F7;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }

  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_RIGHT) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_F8;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }

  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_LCTRL) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_ENTER;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }

  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_ALT) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_P;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }

  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_SPACE) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_P1_5;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }

  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_LSHIFT) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_ESC;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }

  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_Z) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_TAB;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }

  if ((digitalRead(PIN_P1_1) == LOW) && (digitalRead(PIN_P1_X) == LOW)) {
    buf[0] = 0;
    buf[2] = KEY_P2_6;
    Serial.write(buf, 8);
    releaseKey();
    loop ();
    }


  state = digitalRead(PIN_P1_UP);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_UP;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_DOWN);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_DOWN;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_LEFT);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_LEFT;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_RIGHT);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_RIGHT;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_LCTRL);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_LCTRL;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_ALT);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_ALT;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_SPACE);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_SPACE;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_LSHIFT);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_LSHIFT;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_Z);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_Z;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_X);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_X;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_5);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_5;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P1_1);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P1_1;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_R);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_R;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_F);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_F;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_D);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_D;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_G);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_G;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_A);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_A;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_S);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_S;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_Q);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_Q;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_W);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_W;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_I);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_I;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_K);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_K;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_6);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_6;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }

  state = digitalRead(PIN_P2_2);
  if (state != 1) {
    buf[0] = 0;
    buf[2] = KEY_P2_2;
    Serial.write(buf, 8);
    releaseKey();
    //delay(200);
  }



}

void releaseKey()
{
  buf[0] = 0;
  buf[2] = 0;
  Serial.write(buf, 8); // Release key
}