root / arduino-1.0 / libraries / LiquidCrystal / examples / TextDirection / TextDirection.ino @ 58d82c77
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/* |
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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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|
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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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|
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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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|
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This example code is in the public domain. |
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http://www.arduino.cc/en/Tutorial/LiquidCrystal |
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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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Serial.begin(9600); |
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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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