mirror of
https://github.com/esp8266/Arduino.git
synced 2025-10-25 18:38:07 +03:00
87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
/*
|
|
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
|
|
|
|
This example code is in the public domain.
|
|
|
|
http://arduino.cc/en/Tutorial/LiquidCrystalScroll
|
|
|
|
*/
|
|
|
|
// include the library code:
|
|
#include <LiquidCrystal.h>
|
|
|
|
// initialize the library with the numbers of the interface pins
|
|
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
|
|
|
|
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);
|
|
|
|
}
|
|
|