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https://github.com/DCC-EX/CommandStation-EX.git
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43319fd3dd
Add new read/write functions to I2CManager class, and modify the LCD, OLED and PWM classes to use them effectively.
103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
/*
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* © 2021, Neil McKechnie. All rights reserved.
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* Based on the work by DFRobot, Frank de Brabander and Marco Schwartz.
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*
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* This file is part of CommandStation-EX
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*
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* This is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* It 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef LiquidCrystal_I2C_h
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#define LiquidCrystal_I2C_h
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#include <Arduino.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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// flags for backlight control
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#define LCD_BACKLIGHT 0x08
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#define LCD_NOBACKLIGHT 0x00
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#define En 0b00000100 // Enable bit
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#define Rw 0b00000010 // Read/Write bit
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#define Rs 0b00000001 // Register select bit
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class LiquidCrystal_I2C : public Print {
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public:
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LiquidCrystal_I2C(uint8_t lcd_Addr,uint8_t lcd_cols,uint8_t lcd_rows);
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void begin(uint8_t cols, uint8_t rows);
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void clear();
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void noDisplay();
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void display();
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void noBacklight();
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void backlight();
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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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void init();
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private:
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void init_priv();
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void send(uint8_t, uint8_t);
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void write4bits(uint8_t);
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void expanderWrite(uint8_t);
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uint8_t _Addr;
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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 _numlines;
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uint8_t _cols;
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uint8_t _rows;
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uint8_t _backlightval;
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};
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#endif
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