Richard Wackerbarth
10 years ago
15 changed files with 1267 additions and 0 deletions
@ -0,0 +1,24 @@ |
|||||
|
= Liquid Crystal Library for Arduino = |
||||
|
|
||||
|
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. |
||||
|
|
||||
|
For more information about this library please visit us at |
||||
|
http://arduino.cc/en/Reference/LiquidCrystal |
||||
|
|
||||
|
== License == |
||||
|
|
||||
|
Copyright (c) Arduino LLC. All right reserved. |
||||
|
|
||||
|
This library is free software; you can redistribute it and/or |
||||
|
modify it under the terms of the GNU Lesser General Public |
||||
|
License as published by the Free Software Foundation; either |
||||
|
version 2.1 of the License, or (at your option) any later version. |
||||
|
|
||||
|
This library is distributed in the hope that it will be useful, |
||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||||
|
Lesser General Public License for more details. |
||||
|
|
||||
|
You should have received a copy of the GNU Lesser General Public |
||||
|
License along with this library; if not, write to the Free Software |
||||
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
||||
@ -0,0 +1,74 @@ |
|||||
|
/*
|
||||
|
LiquidCrystal Library - Autoscroll |
||||
|
|
||||
|
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 the use of the autoscroll() |
||||
|
and noAutoscroll() functions to make new text scroll or not. |
||||
|
|
||||
|
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/LiquidCrystalAutoscroll
|
||||
|
|
||||
|
*/ |
||||
|
|
||||
|
// 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); |
||||
|
} |
||||
|
|
||||
|
void loop() { |
||||
|
// set the cursor to (0,0):
|
||||
|
lcd.setCursor(0, 0); |
||||
|
// print from 0 to 9:
|
||||
|
for (int thisChar = 0; thisChar < 10; thisChar++) { |
||||
|
lcd.print(thisChar); |
||||
|
delay(500); |
||||
|
} |
||||
|
|
||||
|
// set the cursor to (16,1):
|
||||
|
lcd.setCursor(16, 1); |
||||
|
// set the display to automatically scroll:
|
||||
|
lcd.autoscroll(); |
||||
|
// print from 0 to 9:
|
||||
|
for (int thisChar = 0; thisChar < 10; thisChar++) { |
||||
|
lcd.print(thisChar); |
||||
|
delay(500); |
||||
|
} |
||||
|
// turn off automatic scrolling
|
||||
|
lcd.noAutoscroll(); |
||||
|
|
||||
|
// clear screen for the next loop:
|
||||
|
lcd.clear(); |
||||
|
} |
||||
|
|
||||
@ -0,0 +1,61 @@ |
|||||
|
/*
|
||||
|
LiquidCrystal Library - Blink |
||||
|
|
||||
|
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 makes the |
||||
|
cursor block blink. |
||||
|
|
||||
|
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/LiquidCrystalBlink
|
||||
|
|
||||
|
*/ |
||||
|
|
||||
|
// 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!"); |
||||
|
} |
||||
|
|
||||
|
void loop() { |
||||
|
// Turn off the blinking cursor:
|
||||
|
lcd.noBlink(); |
||||
|
delay(3000); |
||||
|
// Turn on the blinking cursor:
|
||||
|
lcd.blink(); |
||||
|
delay(3000); |
||||
|
} |
||||
|
|
||||
|
|
||||
@ -0,0 +1,61 @@ |
|||||
|
/*
|
||||
|
LiquidCrystal Library - Cursor |
||||
|
|
||||
|
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 cursor() and noCursor() methods to turn |
||||
|
on and off 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/LiquidCrystalCursor
|
||||
|
|
||||
|
*/ |
||||
|
|
||||
|
// 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!"); |
||||
|
} |
||||
|
|
||||
|
void loop() { |
||||
|
// Turn off the cursor:
|
||||
|
lcd.noCursor(); |
||||
|
delay(500); |
||||
|
// Turn on the cursor:
|
||||
|
lcd.cursor(); |
||||
|
delay(500); |
||||
|
} |
||||
|
|
||||
@ -0,0 +1,140 @@ |
|||||
|
/*
|
||||
|
LiquidCrystal Library - Custom Characters |
||||
|
|
||||
|
Demonstrates how to add custom characters on an 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 "I <heart> Arduino!" and a little dancing man |
||||
|
to the 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 potentiometer: |
||||
|
* ends to +5V and ground |
||||
|
* wiper to LCD VO pin (pin 3) |
||||
|
* 10K poterntiometer on pin A0 |
||||
|
|
||||
|
created 21 Mar 2011 |
||||
|
by Tom Igoe |
||||
|
modified 11 Nov 2013 |
||||
|
by Scott Fitzgerald |
||||
|
|
||||
|
Based on Adafruit's example at |
||||
|
https://github.com/adafruit/SPI_VFD/blob/master/examples/createChar/createChar.pde
|
||||
|
|
||||
|
This example code is in the public domain. |
||||
|
http://www.arduino.cc/en/Tutorial/LiquidCrystal
|
||||
|
|
||||
|
Also useful: |
||||
|
http://icontexto.com/charactercreator/
|
||||
|
|
||||
|
*/ |
||||
|
|
||||
|
// 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); |
||||
|
|
||||
|
// make some custom characters:
|
||||
|
byte heart[8] = { |
||||
|
0b00000, |
||||
|
0b01010, |
||||
|
0b11111, |
||||
|
0b11111, |
||||
|
0b11111, |
||||
|
0b01110, |
||||
|
0b00100, |
||||
|
0b00000 |
||||
|
}; |
||||
|
|
||||
|
byte smiley[8] = { |
||||
|
0b00000, |
||||
|
0b00000, |
||||
|
0b01010, |
||||
|
0b00000, |
||||
|
0b00000, |
||||
|
0b10001, |
||||
|
0b01110, |
||||
|
0b00000 |
||||
|
}; |
||||
|
|
||||
|
byte frownie[8] = { |
||||
|
0b00000, |
||||
|
0b00000, |
||||
|
0b01010, |
||||
|
0b00000, |
||||
|
0b00000, |
||||
|
0b00000, |
||||
|
0b01110, |
||||
|
0b10001 |
||||
|
}; |
||||
|
|
||||
|
byte armsDown[8] = { |
||||
|
0b00100, |
||||
|
0b01010, |
||||
|
0b00100, |
||||
|
0b00100, |
||||
|
0b01110, |
||||
|
0b10101, |
||||
|
0b00100, |
||||
|
0b01010 |
||||
|
}; |
||||
|
|
||||
|
byte armsUp[8] = { |
||||
|
0b00100, |
||||
|
0b01010, |
||||
|
0b00100, |
||||
|
0b10101, |
||||
|
0b01110, |
||||
|
0b00100, |
||||
|
0b00100, |
||||
|
0b01010 |
||||
|
}; |
||||
|
|
||||
|
void setup() { |
||||
|
// initialize LCD and set up the number of columns and rows:
|
||||
|
lcd.begin(16, 2); |
||||
|
|
||||
|
// create a new character
|
||||
|
lcd.createChar(0, heart); |
||||
|
// create a new character
|
||||
|
lcd.createChar(1, smiley); |
||||
|
// create a new character
|
||||
|
lcd.createChar(2, frownie); |
||||
|
// create a new character
|
||||
|
lcd.createChar(3, armsDown); |
||||
|
// create a new character
|
||||
|
lcd.createChar(4, armsUp); |
||||
|
|
||||
|
// Print a message to the lcd.
|
||||
|
lcd.print("I "); |
||||
|
lcd.write(byte(0)); // when calling lcd.write() '0' must be cast as a byte
|
||||
|
lcd.print(" Arduino! "); |
||||
|
lcd.write((byte) 1); |
||||
|
|
||||
|
} |
||||
|
|
||||
|
void loop() { |
||||
|
// read the potentiometer on A0:
|
||||
|
int sensorReading = analogRead(A0); |
||||
|
// map the result to 200 - 1000:
|
||||
|
int delayTime = map(sensorReading, 0, 1023, 200, 1000); |
||||
|
// set the cursor to the bottom row, 5th position:
|
||||
|
lcd.setCursor(4, 1); |
||||
|
// draw the little man, arms down:
|
||||
|
lcd.write(3); |
||||
|
delay(delayTime); |
||||
|
lcd.setCursor(4, 1); |
||||
|
// draw him arms up:
|
||||
|
lcd.write(4); |
||||
|
delay(delayTime); |
||||
|
} |
||||
@ -0,0 +1,61 @@ |
|||||
|
/*
|
||||
|
LiquidCrystal Library - display() and noDisplay() |
||||
|
|
||||
|
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 |
||||
|
display() and noDisplay() functions to turn on and off |
||||
|
the display. |
||||
|
|
||||
|
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/LiquidCrystalDisplay
|
||||
|
|
||||
|
*/ |
||||
|
|
||||
|
// 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!"); |
||||
|
} |
||||
|
|
||||
|
void loop() { |
||||
|
// Turn off the display:
|
||||
|
lcd.noDisplay(); |
||||
|
delay(500); |
||||
|
// Turn on the display:
|
||||
|
lcd.display(); |
||||
|
delay(500); |
||||
|
} |
||||
|
|
||||
@ -0,0 +1,60 @@ |
|||||
|
/*
|
||||
|
LiquidCrystal Library - Hello World |
||||
|
|
||||
|
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 shows the time. |
||||
|
|
||||
|
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 |
||||
|
* LCD VSS pin to ground |
||||
|
* LCD VCC pin to 5V |
||||
|
* 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://www.arduino.cc/en/Tutorial/LiquidCrystal
|
||||
|
*/ |
||||
|
|
||||
|
// 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!"); |
||||
|
} |
||||
|
|
||||
|
void loop() { |
||||
|
// set the cursor to column 0, line 1
|
||||
|
// (note: line 1 is the second row, since counting begins with 0):
|
||||
|
lcd.setCursor(0, 1); |
||||
|
// print the number of seconds since reset:
|
||||
|
lcd.print(millis() / 1000); |
||||
|
} |
||||
|
|
||||
@ -0,0 +1,86 @@ |
|||||
|
/*
|
||||
|
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); |
||||
|
|
||||
|
} |
||||
|
|
||||
@ -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 new issue