LiquidCrystal - cursor() y noCursor()

La librería LiquidCrystal te permite controlar displays LCD que sean complatibles con el driver Hitachi HD44780. Hay muchos de ellos ahí fuera, y puedes comunicarte con ellos a través del interfaz de 16 pines.

Este sketch de ejemplo muestra el uso de los métodos cursor() y noCursor() para controlar el cursor en forma de guión bajo.

Ejemplos > Librarias > LiquidCrystal

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

  modified 25 July 2009
  by David A. Mellis

   lcd.begin(16, 2);

   // Turn off the cursor:
   lcd.noCursor();

    // Turn on the cursor:
   lcd.cursor();

   LiquidCrystal Library - Cursor

  This sketch prints "Hello World!" to the LCD and
  uses the cursor()  and noCursor() methods to turn
  on and off the cursor.

  The circuit:

 #include <LiquidCrystal.h>

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

   lcd.begin(2, 16);
   // Print a message to the LCD.
   lcd.print("hello, world!");

   // Turn off the display:
   lcd.noCursor();
   delay(500);
    // Turn on the display:
   lcd.cursor();
   delay(500);

   LiquidCrystal Library - setCursor

  This sketch prints to all the positions of the LCD using the
  setCursor(0 method:

   The circuit:

  * LCD Enable pin to digital pin 11

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

 // these constants won't change.  But you can change the size of
 // your LCD using them:
 const int numRows = 2;
 const int numCols = 16;

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

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

   // loop from ASCII 'a' to ASCII 'z':
   for (int thisLetter = 'a'; thisLetter <= 'z'; thisLetter++) {
     // loop over the columns:
     for (int thisCol = 0; thisCol < numRows; thisCol++) {
       // loop over the rows:
       for (int thisRow = 0; thisRow < numCols; thisRow++) {
         // set the cursor position:
         lcd.setCursor(thisRow,thisCol);
         // print the letter:
         lcd.print(thisLetter, BYTE);
         delay(200);
       }
     }
   }

Examples > Libraries > LiquidCrystal

LiquidCrystal - cursor() and noCursor()

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 cursor() and noCursor() methods to control an underscore-style cursor.

(:include LiquidCrystalCircuit :)

Code

(:div class=code :)

 /*
   LiquidCrystal Library - Cursor
  
  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 cursor()  and noCursor() methods to turn
  on and off the cursor.
  
  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);
   // Print a message to the LCD.
   lcd.print("hello, world!");
 }

 void loop() {
   // Turn off the display:
   lcd.noCursor();
   delay(500);
    // Turn on the display:
   lcd.cursor();
   delay(500);
 }

(:divend:)