Ecrã Display LCD Nokia 5110 para Arduino

#define LCD_NOKIA_DATA HIGH

#define LCD_NOKIA_CMD  LOW

const int pin_sclk = 8;  // pin 8 - Serial clock out (SCLK)

const int pin_din  = 9;  // pin 9 - Serial data out (DIN)

const int pin_dc   = 10; // pin 10 - Data/Command select (D/C)

const int pin_cs   = 11; // pin 11 - LCD chip select (CS/CE)

const int pin_rst  = 12; // pin 12 - LCD reset (RST)

void lcd_write(byte mode, byte w){

  digitalWrite(pin_dc, mode);

  digitalWrite(pin_cs, LOW);

  shiftOut(pin_din, pin_sclk, MSBFIRST, w);

  digitalWrite(pin_cs, HIGH);

}

void setup() {

  pinMode(pin_din, OUTPUT);

  pinMode(pin_sclk, OUTPUT);

  pinMode(pin_dc, OUTPUT);

  pinMode(pin_rst, OUTPUT);

  pinMode(pin_cs, OUTPUT);

  digitalWrite(pin_rst, LOW); 

  digitalWrite(pin_rst, HIGH);

  lcd_write(LCD_NOKIA_CMD, B00100001 );  // LCD Extended Commands.  00100001

  lcd_write(LCD_NOKIA_CMD, B10101111 );  // Set LCD Vop (Contraste) 10101111 

  lcd_write(LCD_NOKIA_CMD, B00000100 );  // Set Temp coefficent     00000100

  lcd_write(LCD_NOKIA_CMD, B00010100 );  // LCD bias mode 1:48      00010100

  lcd_write(LCD_NOKIA_CMD, B00100000 );  // LCD Basic Commands.     00100000

  lcd_write(LCD_NOKIA_CMD, B00001100 );  // LCD no modo normal      00001100

  lcd_write(LCD_NOKIA_CMD, B01000000);   // X-ADDRESS = 0

  lcd_write(LCD_NOKIA_CMD, B10000000);   // Y-ADDRESS = 0

  for (int i=0; i<504; i++){

    lcd_write(LCD_NOKIA_DATA, B00000000);

  }

}

void loop() {

  static boolean horizontal = true;

  for (int i=0; i<504; i++){

    lcd_write(LCD_NOKIA_DATA, B11111111);

    delay(20);

  }

  for (int i=0; i<504; i++){

    lcd_write(LCD_NOKIA_DATA, B00000000);

    delay(20);

  }

  horizontal = !horizontal;

  if (horizontal) {

    lcd_write(LCD_NOKIA_CMD, B00100000 );  // LCD Basic Commands.     00100000

  } else {

    lcd_write(LCD_NOKIA_CMD, B00100010 );  // LCD Basic Commands.     00100000

  }

}