1 | /*
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2 | LiquidCrystal Library - display() and noDisplay()
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3 |
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4 | Demonstrates the use a 16x2 LCD display. The LiquidCrystal
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5 | library works with all LCD displays that are compatible with the
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6 | Hitachi HD44780 driver. There are many of them out there, and you
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7 | can usually tell them by the 16-pin interface.
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8 |
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9 | This sketch prints "Hello World!" to the LCD and uses the
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10 | display() and noDisplay() functions to turn on and off
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11 | the display.
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12 |
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13 | The circuit:
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14 | * LCD RS pin to digital pin 12
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15 | * LCD Enable pin to digital pin 11
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16 | * LCD D4 pin to digital pin 5
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17 | * LCD D5 pin to digital pin 4
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18 | * LCD D6 pin to digital pin 3
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19 | * LCD D7 pin to digital pin 2
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20 | * LCD R/W pin to ground
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21 | * 10K resistor:
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22 | * ends to +5V and ground
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23 | * wiper to LCD VO pin (pin 3)
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24 |
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25 | Library originally added 18 Apr 2008
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26 | by David A. Mellis
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27 | library modified 5 Jul 2009
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28 | by Limor Fried (http://www.ladyada.net)
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29 | example added 9 Jul 2009
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30 | by Tom Igoe
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31 | modified 22 Nov 2010
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32 | by Tom Igoe
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33 |
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34 | This example code is in the public domain.
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35 |
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36 | http://arduino.cc/en/Tutorial/LiquidCrystalDisplay
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37 |
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38 | */
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39 |
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40 | // include the library code:
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41 | #include <LiquidCrystal.h>
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42 |
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43 | // initialize the library with the numbers of the interface pins
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44 | LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
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45 |
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46 | void setup() {
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47 | // set up the LCD's number of columns and rows:
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48 | lcd.begin(16, 2);
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49 | // Print a message to the LCD.
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50 | lcd.print("hello, world!");
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51 | }
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52 |
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53 | void loop() {
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54 | // Turn off the display:
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55 | lcd.noDisplay();
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56 | delay(500);
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57 | // Turn on the display:
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58 | lcd.display();
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59 | delay(500);
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60 | }
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61 |
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