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การใช้งาน LCD กับ Arduino

/*

  LiquidCrystal Library - "Hello !!!!  Arduitronics"

 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 !!!!  Arduitronics" to the LCD

 and shows the time.

  The circuit:

 * LCD RS pin to digital pin 8

 * LCD Enable pin to digital pin 9

 * LCD D4 pin to digital pin 4

 * LCD D5 pin to digital pin 5

 * LCD D6 pin to digital pin 6

 * LCD D7 pin to digital pin 7

 * LCD R/W pin to ground

 * 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 (http://www.ladyada.net)

 example added 9 Jul 2009

 by Tom Igoe

 modified 22 Nov 2010

 by Tom Igoe

 Modified by Arduitronics

 This example code is in the public domain.

 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(8, 9, 4, 5, 6, 7);

void setup() {

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

  lcd.begin(16, 2);

  // Print a message to the LCD.

  lcd.print("Hello !!!");

  lcd.setCursor(0, 1);

  lcd.print("Arduitronics");

}

void loop() {

  // set the cursor to column 0, line 1

  // (note: line 1 is the second row, since counting begins with 0):

  lcd.setCursor(13, 1);

  // print the number of seconds since reset:

  lcd.print(millis()/1000);

}

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