library - Liquid Crystal
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Richard Wackerbarth
parent
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= Liquid Crystal Library for Arduino =
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This library allows an Arduino board to control LiquidCrystal displays (LCDs) based on the Hitachi HD44780 (or a compatible) chipset, which is found on most text-based LCDs.
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For more information about this library please visit us at
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http://arduino.cc/en/Reference/LiquidCrystal
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== License ==
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Copyright (c) Arduino LLC. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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/*
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LiquidCrystal Library - Autoscroll
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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 the use of the autoscroll()
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and noAutoscroll() functions to make new text scroll or not.
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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://arduino.cc/en/Tutorial/LiquidCrystalAutoscroll
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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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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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}
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void loop() {
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// set the cursor to (0,0):
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lcd.setCursor(0, 0);
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// print from 0 to 9:
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for (int thisChar = 0; thisChar < 10; thisChar++) {
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lcd.print(thisChar);
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delay(500);
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}
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// set the cursor to (16,1):
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lcd.setCursor(16, 1);
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// set the display to automatically scroll:
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lcd.autoscroll();
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// print from 0 to 9:
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for (int thisChar = 0; thisChar < 10; thisChar++) {
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lcd.print(thisChar);
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delay(500);
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}
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// turn off automatic scrolling
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lcd.noAutoscroll();
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// clear screen for the next loop:
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lcd.clear();
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}
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/*
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LiquidCrystal Library - Blink
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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 prints "Hello World!" to the LCD and makes the
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cursor block blink.
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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://arduino.cc/en/Tutorial/LiquidCrystalBlink
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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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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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// Print a message to the LCD.
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lcd.print("hello, world!");
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}
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void loop() {
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// Turn off the blinking cursor:
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lcd.noBlink();
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delay(3000);
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// Turn on the blinking cursor:
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lcd.blink();
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delay(3000);
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}
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/*
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LiquidCrystal Library - Cursor
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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 prints "Hello World!" to the LCD and
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uses the cursor() and noCursor() methods to turn
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on and off 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://arduino.cc/en/Tutorial/LiquidCrystalCursor
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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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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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// Print a message to the LCD.
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lcd.print("hello, world!");
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}
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void loop() {
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// Turn off the cursor:
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lcd.noCursor();
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delay(500);
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// Turn on the cursor:
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lcd.cursor();
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delay(500);
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}
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/*
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LiquidCrystal Library - Custom Characters
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Demonstrates how to add custom characters on an LCD display.
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The LiquidCrystal library works with all LCD displays that are
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compatible with the Hitachi HD44780 driver. There are many of
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them out there, and you can usually tell them by the 16-pin interface.
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This sketch prints "I <heart> Arduino!" and a little dancing man
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to the LCD.
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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 potentiometer:
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* ends to +5V and ground
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* wiper to LCD VO pin (pin 3)
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* 10K poterntiometer on pin A0
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created 21 Mar 2011
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by Tom Igoe
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modified 11 Nov 2013
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by Scott Fitzgerald
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Based on Adafruit's example at
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https://github.com/adafruit/SPI_VFD/blob/master/examples/createChar/createChar.pde
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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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Also useful:
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http://icontexto.com/charactercreator/
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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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// make some custom characters:
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byte heart[8] = {
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0b00000,
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0b01010,
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0b11111,
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0b11111,
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0b11111,
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0b01110,
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0b00100,
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0b00000
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};
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byte smiley[8] = {
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0b00000,
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0b00000,
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0b01010,
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0b00000,
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0b00000,
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0b10001,
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0b01110,
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0b00000
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};
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byte frownie[8] = {
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0b00000,
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0b00000,
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0b01010,
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0b00000,
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0b00000,
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0b00000,
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0b01110,
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0b10001
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};
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byte armsDown[8] = {
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0b00100,
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0b01010,
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0b00100,
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0b00100,
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0b01110,
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0b10101,
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0b00100,
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0b01010
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};
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byte armsUp[8] = {
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0b00100,
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0b01010,
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0b00100,
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0b10101,
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0b01110,
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0b00100,
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0b00100,
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0b01010
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};
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void setup() {
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// initialize LCD and set up the number of columns and rows:
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lcd.begin(16, 2);
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// create a new character
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lcd.createChar(0, heart);
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// create a new character
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lcd.createChar(1, smiley);
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// create a new character
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lcd.createChar(2, frownie);
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// create a new character
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lcd.createChar(3, armsDown);
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// create a new character
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lcd.createChar(4, armsUp);
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// Print a message to the lcd.
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lcd.print("I ");
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lcd.write(byte(0)); // when calling lcd.write() '0' must be cast as a byte
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lcd.print(" Arduino! ");
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lcd.write((byte) 1);
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}
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void loop() {
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// read the potentiometer on A0:
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int sensorReading = analogRead(A0);
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// map the result to 200 - 1000:
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int delayTime = map(sensorReading, 0, 1023, 200, 1000);
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// set the cursor to the bottom row, 5th position:
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lcd.setCursor(4, 1);
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// draw the little man, arms down:
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lcd.write(3);
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delay(delayTime);
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lcd.setCursor(4, 1);
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// draw him arms up:
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lcd.write(4);
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delay(delayTime);
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}
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/*
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LiquidCrystal Library - display() and noDisplay()
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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 prints "Hello World!" to the LCD and uses the
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display() and noDisplay() functions to turn on and off
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the display.
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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://arduino.cc/en/Tutorial/LiquidCrystalDisplay
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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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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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// Print a message to the LCD.
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lcd.print("hello, world!");
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}
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void loop() {
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// Turn off the display:
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lcd.noDisplay();
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delay(500);
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// Turn on the display:
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lcd.display();
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delay(500);
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}
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/*
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LiquidCrystal Library - Hello World
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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 prints "Hello World!" to the LCD
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and shows the time.
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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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* LCD VSS pin to ground
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* LCD VCC pin to 5V
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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/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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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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// Print a message to the LCD.
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lcd.print("hello, world!");
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}
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void loop() {
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// set the cursor to column 0, line 1
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// (note: line 1 is the second row, since counting begins with 0):
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lcd.setCursor(0, 1);
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// print the number of seconds since reset:
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lcd.print(millis() / 1000);
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}
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/*
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LiquidCrystal Library - scrollDisplayLeft() and scrollDisplayRight()
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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 prints "Hello World!" to the LCD and uses the
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scrollDisplayLeft() and scrollDisplayRight() methods to scroll
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the text.
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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
|
||||
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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|
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http://arduino.cc/en/Tutorial/LiquidCrystalScroll
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*/
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// include the library code:
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||||
#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);
|
||||
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,65 @@
|
|||
/*
|
||||
LiquidCrystal Library - Serial Input
|
||||
|
||||
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 displays text sent over the serial port
|
||||
(e.g. from the Serial Monitor) on an attached LCD.
|
||||
|
||||
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/LiquidCrystalSerial
|
||||
*/
|
||||
|
||||
// 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);
|
||||
// initialize the serial communications:
|
||||
Serial.begin(9600);
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
// when characters arrive over the serial port...
|
||||
if (Serial.available()) {
|
||||
// wait a bit for the entire message to arrive
|
||||
delay(100);
|
||||
// clear the screen
|
||||
lcd.clear();
|
||||
// read all the available characters
|
||||
while (Serial.available() > 0) {
|
||||
// display each character to the LCD
|
||||
lcd.write(Serial.read());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,86 @@
|
|||
/*
|
||||
LiquidCrystal Library - TextDirection
|
||||
|
||||
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 demonstrates how to use leftToRight() and rightToLeft()
|
||||
to move the cursor.
|
||||
|
||||
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/LiquidCrystalTextDirection
|
||||
|
||||
*/
|
||||
|
||||
// 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);
|
||||
|
||||
int thisChar = 'a';
|
||||
|
||||
void setup() {
|
||||
// set up the LCD's number of columns and rows:
|
||||
lcd.begin(16, 2);
|
||||
// turn on the cursor:
|
||||
lcd.cursor();
|
||||
}
|
||||
|
||||
void loop() {
|
||||
// reverse directions at 'm':
|
||||
if (thisChar == 'm') {
|
||||
// go right for the next letter
|
||||
lcd.rightToLeft();
|
||||
}
|
||||
// reverse again at 's':
|
||||
if (thisChar == 's') {
|
||||
// go left for the next letter
|
||||
lcd.leftToRight();
|
||||
}
|
||||
// reset at 'z':
|
||||
if (thisChar > 'z') {
|
||||
// go to (0,0):
|
||||
lcd.home();
|
||||
// start again at 0
|
||||
thisChar = 'a';
|
||||
}
|
||||
// print the character
|
||||
lcd.write(thisChar);
|
||||
// wait a second:
|
||||
delay(1000);
|
||||
// increment the letter:
|
||||
thisChar++;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,72 @@
|
|||
/*
|
||||
LiquidCrystal Library - setCursor
|
||||
|
||||
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 to all the positions of the LCD using the
|
||||
setCursor(0 method:
|
||||
|
||||
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/LiquidCrystalSetCursor
|
||||
|
||||
*/
|
||||
|
||||
// include the library code:
|
||||
#include <LiquidCrystal.h>
|
||||
|
||||
// these constants won't change. But you can change the size of
|
||||
// your LCD using them:
|
||||
const int numRows = 2;
|
||||
const int numCols = 16;
|
||||
|
||||
// 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(numCols, numRows);
|
||||
}
|
||||
|
||||
void loop() {
|
||||
// loop from ASCII 'a' to ASCII 'z':
|
||||
for (int thisLetter = 'a'; thisLetter <= 'z'; thisLetter++) {
|
||||
// loop over the columns:
|
||||
for (int thisCol = 0; thisCol < numRows; thisCol++) {
|
||||
// loop over the rows:
|
||||
for (int thisRow = 0; thisRow < numCols; thisRow++) {
|
||||
// set the cursor position:
|
||||
lcd.setCursor(thisCol, thisRow);
|
||||
// print the letter:
|
||||
lcd.write(thisLetter);
|
||||
delay(200);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,38 @@
|
|||
#######################################
|
||||
# Syntax Coloring Map For LiquidCrystal
|
||||
#######################################
|
||||
|
||||
#######################################
|
||||
# Datatypes (KEYWORD1)
|
||||
#######################################
|
||||
|
||||
LiquidCrystal KEYWORD1 LiquidCrystal
|
||||
|
||||
#######################################
|
||||
# Methods and Functions (KEYWORD2)
|
||||
#######################################
|
||||
|
||||
begin KEYWORD2
|
||||
clear KEYWORD2
|
||||
home KEYWORD2
|
||||
print KEYWORD2
|
||||
setCursor KEYWORD2
|
||||
cursor KEYWORD2
|
||||
noCursor KEYWORD2
|
||||
blink KEYWORD2
|
||||
noBlink KEYWORD2
|
||||
display KEYWORD2
|
||||
noDisplay KEYWORD2
|
||||
autoscroll KEYWORD2
|
||||
noAutoscroll KEYWORD2
|
||||
leftToRight KEYWORD2
|
||||
rightToLeft KEYWORD2
|
||||
scrollDisplayLeft KEYWORD2
|
||||
scrollDisplayRight KEYWORD2
|
||||
createChar KEYWORD2
|
||||
setRowOffsets KEYWORD2
|
||||
|
||||
#######################################
|
||||
# Constants (LITERAL1)
|
||||
#######################################
|
||||
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
name=LiquidCrystal
|
||||
version=1.0.1
|
||||
author=Arduino, Adafruit
|
||||
maintainer=Arduino <info@arduino.cc>
|
||||
sentence=Allows communication with alphanumerical liquid crystal displays (LCDs). For all Arduino boards.
|
||||
paragraph=This library allows an Arduino board to control LiquidCrystal displays (LCDs) based on the Hitachi HD44780 (or a compatible) chipset, which is found on most text-based LCDs. The library works with in either 4 or 8 bit mode (i.e. using 4 or 8 data lines in addition to the rs, enable, and, optionally, the rw control lines).
|
||||
category=Display
|
||||
url=http://arduino.cc/en/Reference/LiquidCrystal
|
||||
architectures=*
|
||||
|
|
@ -0,0 +1,322 @@
|
|||
#include "LiquidCrystal.h"
|
||||
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <inttypes.h>
|
||||
#include "Arduino.h"
|
||||
|
||||
// When the display powers up, it is configured as follows:
|
||||
//
|
||||
// 1. Display clear
|
||||
// 2. Function set:
|
||||
// DL = 1; 8-bit interface data
|
||||
// N = 0; 1-line display
|
||||
// F = 0; 5x8 dot character font
|
||||
// 3. Display on/off control:
|
||||
// D = 0; Display off
|
||||
// C = 0; Cursor off
|
||||
// B = 0; Blinking off
|
||||
// 4. Entry mode set:
|
||||
// I/D = 1; Increment by 1
|
||||
// S = 0; No shift
|
||||
//
|
||||
// Note, however, that resetting the Arduino doesn't reset the LCD, so we
|
||||
// can't assume that its in that state when a sketch starts (and the
|
||||
// LiquidCrystal constructor is called).
|
||||
|
||||
LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
|
||||
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
|
||||
{
|
||||
init(0, rs, rw, enable, d0, d1, d2, d3, d4, d5, d6, d7);
|
||||
}
|
||||
|
||||
LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
|
||||
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
|
||||
{
|
||||
init(0, rs, 255, enable, d0, d1, d2, d3, d4, d5, d6, d7);
|
||||
}
|
||||
|
||||
LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
|
||||
{
|
||||
init(1, rs, rw, enable, d0, d1, d2, d3, 0, 0, 0, 0);
|
||||
}
|
||||
|
||||
LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
|
||||
{
|
||||
init(1, rs, 255, enable, d0, d1, d2, d3, 0, 0, 0, 0);
|
||||
}
|
||||
|
||||
void LiquidCrystal::init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
|
||||
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
|
||||
{
|
||||
_rs_pin = rs;
|
||||
_rw_pin = rw;
|
||||
_enable_pin = enable;
|
||||
|
||||
_data_pins[0] = d0;
|
||||
_data_pins[1] = d1;
|
||||
_data_pins[2] = d2;
|
||||
_data_pins[3] = d3;
|
||||
_data_pins[4] = d4;
|
||||
_data_pins[5] = d5;
|
||||
_data_pins[6] = d6;
|
||||
_data_pins[7] = d7;
|
||||
|
||||
pinMode(_rs_pin, OUTPUT);
|
||||
// we can save 1 pin by not using RW. Indicate by passing 255 instead of pin#
|
||||
if (_rw_pin != 255) {
|
||||
pinMode(_rw_pin, OUTPUT);
|
||||
}
|
||||
pinMode(_enable_pin, OUTPUT);
|
||||
|
||||
if (fourbitmode)
|
||||
_displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
|
||||
else
|
||||
_displayfunction = LCD_8BITMODE | LCD_1LINE | LCD_5x8DOTS;
|
||||
|
||||
begin(16, 1);
|
||||
}
|
||||
|
||||
void LiquidCrystal::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
|
||||
if (lines > 1) {
|
||||
_displayfunction |= LCD_2LINE;
|
||||
}
|
||||
_numlines = lines;
|
||||
|
||||
setRowOffsets(0x00, 0x40, 0x00 + cols, 0x40 + cols);
|
||||
|
||||
// for some 1 line displays you can select a 10 pixel high font
|
||||
if ((dotsize != LCD_5x8DOTS) && (lines == 1)) {
|
||||
_displayfunction |= LCD_5x10DOTS;
|
||||
}
|
||||
|
||||
// SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
|
||||
// according to datasheet, we need at least 40ms after power rises above 2.7V
|
||||
// before sending commands. Arduino can turn on way before 4.5V so we'll wait 50
|
||||
delayMicroseconds(50000);
|
||||
// Now we pull both RS and R/W low to begin commands
|
||||
digitalWrite(_rs_pin, LOW);
|
||||
digitalWrite(_enable_pin, LOW);
|
||||
if (_rw_pin != 255) {
|
||||
digitalWrite(_rw_pin, LOW);
|
||||
}
|
||||
|
||||
//put the LCD into 4 bit or 8 bit mode
|
||||
if (! (_displayfunction & LCD_8BITMODE)) {
|
||||
// this is according to the hitachi HD44780 datasheet
|
||||
// figure 24, pg 46
|
||||
|
||||
// we start in 8bit mode, try to set 4 bit mode
|
||||
write4bits(0x03);
|
||||
delayMicroseconds(4500); // wait min 4.1ms
|
||||
|
||||
// second try
|
||||
write4bits(0x03);
|
||||
delayMicroseconds(4500); // wait min 4.1ms
|
||||
|
||||
// third go!
|
||||
write4bits(0x03);
|
||||
delayMicroseconds(150);
|
||||
|
||||
// finally, set to 4-bit interface
|
||||
write4bits(0x02);
|
||||
} else {
|
||||
// this is according to the hitachi HD44780 datasheet
|
||||
// page 45 figure 23
|
||||
|
||||
// Send function set command sequence
|
||||
command(LCD_FUNCTIONSET | _displayfunction);
|
||||
delayMicroseconds(4500); // wait more than 4.1ms
|
||||
|
||||
// second try
|
||||
command(LCD_FUNCTIONSET | _displayfunction);
|
||||
delayMicroseconds(150);
|
||||
|
||||
// third go
|
||||
command(LCD_FUNCTIONSET | _displayfunction);
|
||||
}
|
||||
|
||||
// finally, set # lines, font size, etc.
|
||||
command(LCD_FUNCTIONSET | _displayfunction);
|
||||
|
||||
// turn the display on with no cursor or blinking default
|
||||
_displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;
|
||||
display();
|
||||
|
||||
// clear it off
|
||||
clear();
|
||||
|
||||
// Initialize to default text direction (for romance languages)
|
||||
_displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
|
||||
// set the entry mode
|
||||
command(LCD_ENTRYMODESET | _displaymode);
|
||||
|
||||
}
|
||||
|
||||
void LiquidCrystal::setRowOffsets(int row0, int row1, int row2, int row3)
|
||||
{
|
||||
_row_offsets[0] = row0;
|
||||
_row_offsets[1] = row1;
|
||||
_row_offsets[2] = row2;
|
||||
_row_offsets[3] = row3;
|
||||
}
|
||||
|
||||
/********** high level commands, for the user! */
|
||||
void LiquidCrystal::clear()
|
||||
{
|
||||
command(LCD_CLEARDISPLAY); // clear display, set cursor position to zero
|
||||
delayMicroseconds(2000); // this command takes a long time!
|
||||
}
|
||||
|
||||
void LiquidCrystal::home()
|
||||
{
|
||||
command(LCD_RETURNHOME); // set cursor position to zero
|
||||
delayMicroseconds(2000); // this command takes a long time!
|
||||
}
|
||||
|
||||
void LiquidCrystal::setCursor(uint8_t col, uint8_t row)
|
||||
{
|
||||
const size_t max_lines = sizeof(_row_offsets) / sizeof(*_row_offsets);
|
||||
if ( row >= max_lines ) {
|
||||
row = max_lines - 1; // we count rows starting w/0
|
||||
}
|
||||
if ( row >= _numlines ) {
|
||||
row = _numlines - 1; // we count rows starting w/0
|
||||
}
|
||||
|
||||
command(LCD_SETDDRAMADDR | (col + _row_offsets[row]));
|
||||
}
|
||||
|
||||
// Turn the display on/off (quickly)
|
||||
void LiquidCrystal::noDisplay() {
|
||||
_displaycontrol &= ~LCD_DISPLAYON;
|
||||
command(LCD_DISPLAYCONTROL | _displaycontrol);
|
||||
}
|
||||
void LiquidCrystal::display() {
|
||||
_displaycontrol |= LCD_DISPLAYON;
|
||||
command(LCD_DISPLAYCONTROL | _displaycontrol);
|
||||
}
|
||||
|
||||
// Turns the underline cursor on/off
|
||||
void LiquidCrystal::noCursor() {
|
||||
_displaycontrol &= ~LCD_CURSORON;
|
||||
command(LCD_DISPLAYCONTROL | _displaycontrol);
|
||||
}
|
||||
void LiquidCrystal::cursor() {
|
||||
_displaycontrol |= LCD_CURSORON;
|
||||
command(LCD_DISPLAYCONTROL | _displaycontrol);
|
||||
}
|
||||
|
||||
// Turn on and off the blinking cursor
|
||||
void LiquidCrystal::noBlink() {
|
||||
_displaycontrol &= ~LCD_BLINKON;
|
||||
command(LCD_DISPLAYCONTROL | _displaycontrol);
|
||||
}
|
||||
void LiquidCrystal::blink() {
|
||||
_displaycontrol |= LCD_BLINKON;
|
||||
command(LCD_DISPLAYCONTROL | _displaycontrol);
|
||||
}
|
||||
|
||||
// These commands scroll the display without changing the RAM
|
||||
void LiquidCrystal::scrollDisplayLeft(void) {
|
||||
command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
|
||||
}
|
||||
void LiquidCrystal::scrollDisplayRight(void) {
|
||||
command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
|
||||
}
|
||||
|
||||
// This is for text that flows Left to Right
|
||||
void LiquidCrystal::leftToRight(void) {
|
||||
_displaymode |= LCD_ENTRYLEFT;
|
||||
command(LCD_ENTRYMODESET | _displaymode);
|
||||
}
|
||||
|
||||
// This is for text that flows Right to Left
|
||||
void LiquidCrystal::rightToLeft(void) {
|
||||
_displaymode &= ~LCD_ENTRYLEFT;
|
||||
command(LCD_ENTRYMODESET | _displaymode);
|
||||
}
|
||||
|
||||
// This will 'right justify' text from the cursor
|
||||
void LiquidCrystal::autoscroll(void) {
|
||||
_displaymode |= LCD_ENTRYSHIFTINCREMENT;
|
||||
command(LCD_ENTRYMODESET | _displaymode);
|
||||
}
|
||||
|
||||
// This will 'left justify' text from the cursor
|
||||
void LiquidCrystal::noAutoscroll(void) {
|
||||
_displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
|
||||
command(LCD_ENTRYMODESET | _displaymode);
|
||||
}
|
||||
|
||||
// Allows us to fill the first 8 CGRAM locations
|
||||
// with custom characters
|
||||
void LiquidCrystal::createChar(uint8_t location, uint8_t charmap[]) {
|
||||
location &= 0x7; // we only have 8 locations 0-7
|
||||
command(LCD_SETCGRAMADDR | (location << 3));
|
||||
for (int i=0; i<8; i++) {
|
||||
write(charmap[i]);
|
||||
}
|
||||
}
|
||||
|
||||
/*********** mid level commands, for sending data/cmds */
|
||||
|
||||
inline void LiquidCrystal::command(uint8_t value) {
|
||||
send(value, LOW);
|
||||
}
|
||||
|
||||
inline size_t LiquidCrystal::write(uint8_t value) {
|
||||
send(value, HIGH);
|
||||
return 1; // assume sucess
|
||||
}
|
||||
|
||||
/************ low level data pushing commands **********/
|
||||
|
||||
// write either command or data, with automatic 4/8-bit selection
|
||||
void LiquidCrystal::send(uint8_t value, uint8_t mode) {
|
||||
digitalWrite(_rs_pin, mode);
|
||||
|
||||
// if there is a RW pin indicated, set it low to Write
|
||||
if (_rw_pin != 255) {
|
||||
digitalWrite(_rw_pin, LOW);
|
||||
}
|
||||
|
||||
if (_displayfunction & LCD_8BITMODE) {
|
||||
write8bits(value);
|
||||
} else {
|
||||
write4bits(value>>4);
|
||||
write4bits(value);
|
||||
}
|
||||
}
|
||||
|
||||
void LiquidCrystal::pulseEnable(void) {
|
||||
digitalWrite(_enable_pin, LOW);
|
||||
delayMicroseconds(1);
|
||||
digitalWrite(_enable_pin, HIGH);
|
||||
delayMicroseconds(1); // enable pulse must be >450ns
|
||||
digitalWrite(_enable_pin, LOW);
|
||||
delayMicroseconds(100); // commands need > 37us to settle
|
||||
}
|
||||
|
||||
void LiquidCrystal::write4bits(uint8_t value) {
|
||||
for (int i = 0; i < 4; i++) {
|
||||
pinMode(_data_pins[i], OUTPUT);
|
||||
digitalWrite(_data_pins[i], (value >> i) & 0x01);
|
||||
}
|
||||
|
||||
pulseEnable();
|
||||
}
|
||||
|
||||
void LiquidCrystal::write8bits(uint8_t value) {
|
||||
for (int i = 0; i < 8; i++) {
|
||||
pinMode(_data_pins[i], OUTPUT);
|
||||
digitalWrite(_data_pins[i], (value >> i) & 0x01);
|
||||
}
|
||||
|
||||
pulseEnable();
|
||||
}
|
||||
|
|
@ -0,0 +1,108 @@
|
|||
#ifndef LiquidCrystal_h
|
||||
#define LiquidCrystal_h
|
||||
|
||||
#include <inttypes.h>
|
||||
#include "Print.h"
|
||||
|
||||
// commands
|
||||
#define LCD_CLEARDISPLAY 0x01
|
||||
#define LCD_RETURNHOME 0x02
|
||||
#define LCD_ENTRYMODESET 0x04
|
||||
#define LCD_DISPLAYCONTROL 0x08
|
||||
#define LCD_CURSORSHIFT 0x10
|
||||
#define LCD_FUNCTIONSET 0x20
|
||||
#define LCD_SETCGRAMADDR 0x40
|
||||
#define LCD_SETDDRAMADDR 0x80
|
||||
|
||||
// flags for display entry mode
|
||||
#define LCD_ENTRYRIGHT 0x00
|
||||
#define LCD_ENTRYLEFT 0x02
|
||||
#define LCD_ENTRYSHIFTINCREMENT 0x01
|
||||
#define LCD_ENTRYSHIFTDECREMENT 0x00
|
||||
|
||||
// flags for display on/off control
|
||||
#define LCD_DISPLAYON 0x04
|
||||
#define LCD_DISPLAYOFF 0x00
|
||||
#define LCD_CURSORON 0x02
|
||||
#define LCD_CURSOROFF 0x00
|
||||
#define LCD_BLINKON 0x01
|
||||
#define LCD_BLINKOFF 0x00
|
||||
|
||||
// flags for display/cursor shift
|
||||
#define LCD_DISPLAYMOVE 0x08
|
||||
#define LCD_CURSORMOVE 0x00
|
||||
#define LCD_MOVERIGHT 0x04
|
||||
#define LCD_MOVELEFT 0x00
|
||||
|
||||
// flags for function set
|
||||
#define LCD_8BITMODE 0x10
|
||||
#define LCD_4BITMODE 0x00
|
||||
#define LCD_2LINE 0x08
|
||||
#define LCD_1LINE 0x00
|
||||
#define LCD_5x10DOTS 0x04
|
||||
#define LCD_5x8DOTS 0x00
|
||||
|
||||
class LiquidCrystal : public Print {
|
||||
public:
|
||||
LiquidCrystal(uint8_t rs, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
|
||||
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
|
||||
LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
|
||||
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
|
||||
LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);
|
||||
LiquidCrystal(uint8_t rs, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);
|
||||
|
||||
void init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
|
||||
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
|
||||
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
|
||||
|
||||
void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);
|
||||
|
||||
void clear();
|
||||
void home();
|
||||
|
||||
void noDisplay();
|
||||
void display();
|
||||
void noBlink();
|
||||
void blink();
|
||||
void noCursor();
|
||||
void cursor();
|
||||
void scrollDisplayLeft();
|
||||
void scrollDisplayRight();
|
||||
void leftToRight();
|
||||
void rightToLeft();
|
||||
void autoscroll();
|
||||
void noAutoscroll();
|
||||
|
||||
void setRowOffsets(int row1, int row2, int row3, int row4);
|
||||
void createChar(uint8_t, uint8_t[]);
|
||||
void setCursor(uint8_t, uint8_t);
|
||||
virtual size_t write(uint8_t);
|
||||
void command(uint8_t);
|
||||
|
||||
using Print::write;
|
||||
private:
|
||||
void send(uint8_t, uint8_t);
|
||||
void write4bits(uint8_t);
|
||||
void write8bits(uint8_t);
|
||||
void pulseEnable();
|
||||
|
||||
uint8_t _rs_pin; // LOW: command. HIGH: character.
|
||||
uint8_t _rw_pin; // LOW: write to LCD. HIGH: read from LCD.
|
||||
uint8_t _enable_pin; // activated by a HIGH pulse.
|
||||
uint8_t _data_pins[8];
|
||||
|
||||
uint8_t _displayfunction;
|
||||
uint8_t _displaycontrol;
|
||||
uint8_t _displaymode;
|
||||
|
||||
uint8_t _initialized;
|
||||
|
||||
uint8_t _numlines;
|
||||
uint8_t _row_offsets[4];
|
||||
};
|
||||
|
||||
#endif
|
||||
Loading…
Reference in a new issue