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139 lines
4 KiB
C++
139 lines
4 KiB
C++
/*
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CONTENTS FROM INCLUDED LICENSE FILE:
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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://www.arduino.cc/en/Reference/LiquidCrystal
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== License ==
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Copyright (C) 2006-2008 Hans-Christoph Steiner. All rights reserved.
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Copyright (c) 2010 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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#ifndef LiquidCrystal_h
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#define LiquidCrystal_h
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#include <inttypes.h>
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#include "Print.h"
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// commands
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#define LCD_CLEARDISPLAY 0x01
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#define LCD_RETURNHOME 0x02
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#define LCD_ENTRYMODESET 0x04
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#define LCD_DISPLAYCONTROL 0x08
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#define LCD_CURSORSHIFT 0x10
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#define LCD_FUNCTIONSET 0x20
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#define LCD_SETCGRAMADDR 0x40
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#define LCD_SETDDRAMADDR 0x80
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// flags for display entry mode
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#define LCD_ENTRYRIGHT 0x00
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#define LCD_ENTRYLEFT 0x02
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#define LCD_ENTRYSHIFTINCREMENT 0x01
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#define LCD_ENTRYSHIFTDECREMENT 0x00
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// flags for display on/off control
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#define LCD_DISPLAYON 0x04
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#define LCD_DISPLAYOFF 0x00
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#define LCD_CURSORON 0x02
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#define LCD_CURSOROFF 0x00
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#define LCD_BLINKON 0x01
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#define LCD_BLINKOFF 0x00
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// flags for display/cursor shift
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#define LCD_DISPLAYMOVE 0x08
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#define LCD_CURSORMOVE 0x00
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#define LCD_MOVERIGHT 0x04
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#define LCD_MOVELEFT 0x00
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// flags for function set
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#define LCD_8BITMODE 0x10
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#define LCD_4BITMODE 0x00
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#define LCD_2LINE 0x08
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#define LCD_1LINE 0x00
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#define LCD_5x10DOTS 0x04
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#define LCD_5x8DOTS 0x00
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class LiquidCrystal : public Print {
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public:
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LiquidCrystal(uint8_t rs, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
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uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
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LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
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uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
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LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);
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LiquidCrystal(uint8_t rs, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);
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void init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
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uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
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uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
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void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);
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void clear();
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void home();
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void noDisplay();
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void display();
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void noBlink();
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void blink();
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void noCursor();
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void cursor();
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void scrollDisplayLeft();
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void scrollDisplayRight();
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void leftToRight();
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void rightToLeft();
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void autoscroll();
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void noAutoscroll();
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void setRowOffsets(int row1, int row2, int row3, int row4);
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void createChar(uint8_t, uint8_t[]);
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void setCursor(uint8_t, uint8_t);
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virtual size_t write(uint8_t);
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void command(uint8_t);
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using Print::write;
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private:
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void send(uint8_t, uint8_t);
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void write4bits(uint8_t);
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void write8bits(uint8_t);
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void pulseEnable();
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uint8_t _rs_pin; // LOW: command. HIGH: character.
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uint8_t _rw_pin; // LOW: write to LCD. HIGH: read from LCD.
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uint8_t _enable_pin; // activated by a HIGH pulse.
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uint8_t _data_pins[8];
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uint8_t _displayfunction;
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uint8_t _displaycontrol;
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uint8_t _displaymode;
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uint8_t _initialized;
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uint8_t _numlines;
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uint8_t _row_offsets[4];
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};
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#endif
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