| /* | |
| 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 Enable pin to digital pin 11 | |
| * 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 | |
| * 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 7 Nov 2016 | |
| by Arturo Guadalupi | |
| This example code is in the public domain. | |
| http://www.arduino.cc/en/Tutorial/LiquidCrystalScroll | |
| */ | |
| // include the library code: | |
| // initialize the library by associating any needed LCD interface pin | |
| // with the arduino pin number it is connected to | |
| const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2; | |
| LiquidCrystal lcd(rs, en, d4, d5, d6, d7); | |
| 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, world!"); | |
| delay(1000); | |
| } | |
| void loop() { | |
| // scroll 13 positions (string length) to the left | |
| // to move it offscreen left: | |
| for (int positionCounter = 0; positionCounter < 13; positionCounter++) { | |
| // scroll one position left: | |
| lcd.scrollDisplayLeft(); | |
| // wait a bit: | |
| delay(150); | |
| } | |
| // scroll 29 positions (string length + display length) to the right | |
| // to move it offscreen right: | |
| for (int positionCounter = 0; positionCounter < 29; positionCounter++) { | |
| // scroll one position right: | |
| lcd.scrollDisplayRight(); | |
| // wait a bit: | |
| delay(150); | |
| } | |
| // scroll 16 positions (display length + string length) to the left | |
| // to move it back to center: | |
| for (int positionCounter = 0; positionCounter < 16; positionCounter++) { | |
| // scroll one position left: | |
| lcd.scrollDisplayLeft(); | |
| // wait a bit: | |
| delay(150); | |
| } | |
| // delay at the end of the full loop: | |
| delay(1000); | |
| } | |