mirror of https://github.com/noisymime/Arduino.git
87 lines
1.7 KiB
C++
87 lines
1.7 KiB
C++
/*
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LiquidCrystal Library - TextDirection
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Demonstrates the use a 16x2 LCD display. The LiquidCrystal
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library works with all LCD displays that are compatible with the
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Hitachi HD44780 driver. There are many of them out there, and you
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can usually tell them by the 16-pin interface.
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This sketch demonstrates how to use leftToRight() and rightToLeft()
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to move the cursor.
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The circuit:
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* LCD RS pin to digital pin 12
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* LCD Enable pin to digital pin 11
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* LCD D4 pin to digital pin 5
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* LCD D5 pin to digital pin 4
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* LCD D6 pin to digital pin 3
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* LCD D7 pin to digital pin 2
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* LCD R/W pin to ground
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* 10K resistor:
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* ends to +5V and ground
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* wiper to LCD VO pin (pin 3)
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Library originally added 18 Apr 2008
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by David A. Mellis
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library modified 5 Jul 2009
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by Limor Fried (http://www.ladyada.net)
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example added 9 Jul 2009
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by Tom Igoe
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modified 22 Nov 2010
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by Tom Igoe
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This example code is in the public domain.
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http://www.arduino.cc/en/Tutorial/LiquidCrystalTextDirection
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*/
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// include the library code:
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#include <LiquidCrystal.h>
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// initialize the library with the numbers of the interface pins
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LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
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int thisChar = 'a';
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void setup() {
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// set up the LCD's number of columns and rows:
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lcd.begin(16, 2);
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// turn on the cursor:
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lcd.cursor();
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}
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void loop() {
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// reverse directions at 'm':
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if (thisChar == 'm') {
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// go right for the next letter
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lcd.rightToLeft();
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}
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// reverse again at 's':
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if (thisChar == 's') {
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// go left for the next letter
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lcd.leftToRight();
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}
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// reset at 'z':
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if (thisChar > 'z') {
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// go to (0,0):
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lcd.home();
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// start again at 0
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thisChar = 'a';
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}
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// print the character
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lcd.write(thisChar);
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// wait a second:
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delay(1000);
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// increment the letter:
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thisChar++;
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}
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