La librería LiquidCrystal, te permite controlar pantallas LCD que son compatibles con el controlador Hitachi HD44780. Hay muchas de ellas ahí fuera, I puedes normalmente reconocerlas por que poseen una interfaz de 16 pines.

Ejemplos > Librerías > LiquidCrystal

LiquidCrystal - autoscroll() (Desplazamiento automático)

La librería LiquidCrystal, te permite controlar pantallas LCD que son compatibles con el controlador Hitachi HD44780. Hay muchas de ellas ahí fuera, I puedes normalmente reconocerlas por que poseen una interfaz de 16 pines

Este programa de ejemplo muestra como usar las funciones autoscroll() y noAutoscroll() para mover todo el texto de la pantalla a la izquierda o a la derecha.

autoscroll() mueve todo el texto un espacio a la izquierda cada vez que se añade una letra.

noAutoscroll() apaga el desplazamiento

Este programa imprime caracteres del 0 al 9 con el auto desplazamiento apagado, luego mueve el cursor a la parte inferior derecha, enciende el auto desplazamiento, y luego imprime de nuevo.

Código

 (:includeurl http://arduino.googlecode.com/svn/trunk/libraries/LiquidCrystal/examples/Autoscroll/Autoscroll.pde border=0:)

 (:includeurl http://arduino.googlecode.com/svn/trunk/libraries/LiquidCrystal/examples/AutoScroll/AutoScroll.pde border=0:)

This sketch prints the characters 0 to 9 with autoscroll off, then moves the cursor to the bottom right, turns autoscroll on, and prints them again.

LiquidCrystal - autoscroll()

This example sketch shows how to use the autoscroll() and noAutoscroll() methods to move all the text on the display left or right.

autoscroll() moves all the text one space to the left each time a letter is added

noAutoscroll() turns scrolling off

This sketch prints the characters @0@ to @9@ with autoscroll off, then moves the cursor to the bottom right, turns autoscroll on, and prints them again.

   LiquidCrystal Library - Autoscroll

  This sketch demonstrates the use of the autoscroll()
  and noAutoscroll() functions to make new text scroll or not.

  The circuit:

  modified 25 July 2009
  by David A. Mellis

 #include <LiquidCrystal.h>

 LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

   // set up the LCD's number of columns and rows: 
   lcd.begin(16,2);

   // set the cursor to (0,0):
   lcd.setCursor(0, 0);
   // print from 0 to 9:
   for (int thisChar = 0; thisChar < 10; thisChar++) {
    lcd.print(thisChar);
    delay(500);

   // set the cursor to (16,1):
   lcd.setCursor(16,1);
   // set the display to automatically scroll:
   lcd.autoscroll();
   // print from 0 to 9:
   for (int thisChar = 0; thisChar < 10; thisChar++) {
     lcd.print(thisChar);
     delay(500);

   // turn off automatic scrolling
   lcd.noAutoscroll();

   // clear screen for the next loop:
   lcd.clear();

  * LCD Enable pin to digital pin 11

  by Limor Fried (http://www.ladyada.net)
  example added 9 Jul 2009

 LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

   // set up the LCD's number of rows and columns: 

Examples > Libraries > LiquidCrystal

LiquidCrystal - scrollDisplayLeft() and scrollDisplayRight()

The LiquidCrystal library allows you to control LCD displays that are compatible with the Hitachi HD44780 driver. There are many of them out there, and you can usually tell them by the 16-pin interface.

This example sketch shows how to use the scrollDisplayLeft() and scrollDisplayRight() methods to move all the text on the display left or right.

scrollDisplayLeft() moves all the text one space to the left

scrollDisplayRight() moves all the text one space to the right

This sketch prints "hello world!", then scrolls it left, then right.

(:include LiquidCrystalCircuit :)

Code

(:div class=code :)

 /*
   LiquidCrystal Library - scrollDisplayLeft() and scrollDisplayRight()
  
  Demonstrates the use a 16x2 LCD display.  The LiquidCrystal
  library works with all LCD displays that are compatible with the 
  Hitachi HD44780 driver. There are many of them out there, and you
  can usually tell them by the 16-pin interface.
  
  This sketch prints "Hello World!" to the LCD and uses the
  scrollDisplayLeft() and scrollDisplayRight() methods to scroll
  the text.
  
   The circuit:
  * LCD RS pin to digital pin 12
  * LCD R/W pin to digital pin 11
  * LCD Enable pin to digital pin 10
  * LCD D4 pin to digital pin 5
  * LCD D5 pin to digital pin 4
  * LCD D6 pin to digital pin 3
  * LCD D7 pin to digital pin 2
  * 10K resistor:
  * ends to +5V and ground
  * wiper to LCD VO pin (pin 3)
  
  Library originally added 18 Apr 2008
  by David A. Mellis
  library modified 5 Jul 2009
  by Limor Fried
  example added 7 Jul 2009
  by Tom Igoe 
  
  http://www.arduino.cc/en/Tutorial/LiquidCrystal
  */

 // include the library code:
 #include <LiquidCrystal.h>

 // initialize the library with the numbers of the interface pins
 LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);

 void setup() {
   // set up the LCD's number of columns and rows: 
   lcd.begin(2, 16);
   lcd.setCursor(0,7);
   // Print a message to the LCD.
   lcd.print("hello, world!");
 }

 void loop() {
   // scroll 27 positions (display length + string length) to the left:
   for (int positionCounter = 0; positionCounter < 27; positionCounter++) {
     // scroll one position left:
     lcd.scrollDisplayLeft(); 
     // wait a bit:
     delay(200);
   }

   // scroll 27 positions (display length + string length) to the right:
   for (int positionCounter = 0; positionCounter < 27; positionCounter++) {
     // scroll one position right:
     lcd.scrollDisplayRight(); 
     // wait a bit:
     delay(200);
   }
 }

(:divend:)