Merge branch 'ide-1.5.x'

README.adoc

@@ -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

examples/Autoscroll/Autoscroll.ino

@@ -44,7 +44,7 @@ LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
 
 void setup() {
   // set up the LCD's number of columns and rows:
-  lcd.begin(16,2);
+  lcd.begin(16, 2);
 }
 
 void loop() {
@@ -57,7 +57,7 @@ void loop() {
   }
 
   // set the cursor to (16,1):
-  lcd.setCursor(16,1);
+  lcd.setCursor(16, 1);
   // set the display to automatically scroll:
   lcd.autoscroll();
   // print from 0 to 9:

examples/CustomCharacter/CustomCharacter.ino

@@ -119,7 +119,7 @@ void setup() {
   lcd.print("I "); 
   lcd.write(byte(0)); // when calling lcd.write() '0' must be cast as a byte
   lcd.print(" Arduino! ");
-  lcd.write(1);
+  lcd.write((byte) 1);
 
 }
 

examples/HelloWorld/HelloWorld.ino

@@ -55,6 +55,6 @@ void loop() {
   // (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);
+  lcd.print(millis() / 1000);
 }
 

examples/SerialDisplay/SerialDisplay.ino

@@ -41,7 +41,7 @@
 // initialize the library with the numbers of the interface pins
 LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
 
-void setup(){
+void setup() {
   // set up the LCD's number of columns and rows:
   lcd.begin(16, 2);
   // initialize the serial communications:

examples/TextDirection/TextDirection.ino

@@ -1,40 +1,40 @@
-  /*
-  LiquidCrystal Library - TextDirection
+/*
+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.
+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.
+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)
+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
+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.
+This example code is in the public domain.
 
- http://arduino.cc/en/Tutorial/LiquidCrystalTextDirection
+http://arduino.cc/en/Tutorial/LiquidCrystalTextDirection
 
- */
+*/
 
 // include the library code:
 #include <LiquidCrystal.h>

examples/setCursor/setCursor.ino

@@ -49,7 +49,7 @@ LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
 
 void setup() {
   // set up the LCD's number of columns and rows:
-  lcd.begin(numCols,numRows);
+  lcd.begin(numCols, numRows);
 }
 
 void loop() {
@@ -60,7 +60,7 @@ void loop() {
       // loop over the rows:
       for (int thisRow = 0; thisRow < numCols; thisRow++) {
         // set the cursor position:
-        lcd.setCursor(thisCol,thisRow);
+        lcd.setCursor(thisCol, thisRow);
         // print the letter:
         lcd.write(thisLetter);
         delay(200);

keywords.txt

@@ -30,6 +30,7 @@ rightToLeft	KEYWORD2
 scrollDisplayLeft	KEYWORD2
 scrollDisplayRight	KEYWORD2
 createChar	KEYWORD2
+setRowOffsets	KEYWORD2
 
 #######################################
 # Constants (LITERAL1)

library.properties

@@ -0,0 +1,9 @@
+name=LiquidCrystal
+version=1.0
+author=
+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=*

src/LiquidCrystal.cpp

@@ -87,10 +87,11 @@ void LiquidCrystal::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
     _displayfunction |= LCD_2LINE;
   }
   _numlines = lines;
-  _currline = 0;
+
+  setRowOffsets(0x00, 0x40, 0x00 + cols, 0x40 + cols);  
 
   // for some 1 line displays you can select a 10 pixel high font
-  if ((dotsize != 0) && (lines == 1)) {
+  if ((dotsize != LCD_5x8DOTS) && (lines == 1)) {
     _displayfunction |= LCD_5x10DOTS;
   }
 
@@ -157,6 +158,14 @@ void LiquidCrystal::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
 
 }
 
+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()
 {
@@ -172,12 +181,15 @@ void LiquidCrystal::home()
 
 void LiquidCrystal::setCursor(uint8_t col, uint8_t row)
 {
-  int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
+  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
+    row = _numlines - 1;    // we count rows starting w/0
   }
   
-  command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
+  command(LCD_SETDDRAMADDR | (col + _row_offsets[row]));
 }
 
 // Turn the display on/off (quickly)

src/LiquidCrystal.h

@@ -77,6 +77,7 @@ public:
   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);
@@ -100,7 +101,8 @@ private:
 
   uint8_t _initialized;
 
-  uint8_t _numlines,_currline;
+  uint8_t _numlines;
+  uint8_t _row_offsets[4];
 };
 
 #endif