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127 lines
4.0 KiB
C++
127 lines
4.0 KiB
C++
// ---------------------------------------------------------------------------
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// Created by GHPS on 5/06/2012.
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// Copyright 2012 - Under creative commons license 3.0:
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// Attribution-ShareAlike CC BY-SA
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//
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// This software is furnished "as is", without technical support, and with no
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// warranty, express or implied, as to its usefulness for any purpose.
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//
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// Thread Safe: No
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// Extendable: Yes
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//
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// @file LiquidCrystal_I2C_ByVac.c
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// This file implements a basic liquid crystal library that comes as standard
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// in the Arduino SDK but using the extension board BV4218/BV4208 from ByVac.
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//
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// @brief
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// This is a basic implementation of the LiquidCrystal library of the
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// Arduino SDK. The original library has been reworked in such a way that
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// this class implements the all methods to command an LCD based
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// on the Hitachi HD44780 and compatible chipsets using I2C extension
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// backpack BV4218 from ByVac.
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//
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// The functionality provided by this class and its base class is identical
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// to the original functionality of the Arduino LiquidCrystal library.
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//
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// @author GHPS - ghps-et-users-sourceforge-net
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// ---------------------------------------------------------------------------
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#ifndef LiquidCrystal_I2C_ByVac_h
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#define LiquidCrystal_I2C_ByVac_h
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#include <inttypes.h>
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#include <Print.h>
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#include <../Wire/Wire.h>
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#include "LCD.h"
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class LiquidCrystal_I2C_ByVac : public LCD
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{
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public:
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/*!
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@method
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@abstract Class constructor.
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@discussion Initializes class variables and defines the I2C address of the
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LCD. The constructor does not initialize the LCD.
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@param lcd_Addr[in] I2C address of the IO expansion module. For BV4218,
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the address can be configured using the address commands (to be implemented).
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*/
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LiquidCrystal_I2C_ByVac (uint8_t lcd_Addr);
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/*!
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@function
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@abstract LCD initialization and associated HW.
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@discussion Initializes the LCD to a given size (col, row). This methods
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initializes the LCD, therefore, it MUST be called prior to using any other
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method from this class or parent class.
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The begin method can be overloaded if necessary to initialize any HW that
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is implemented by a library and can't be done during construction, here
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we use the Wire class.
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@param cols[in] the number of columns that the display has
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@param rows[in] the number of rows that the display has
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@param charsize[in] size of the characters of the LCD: LCD_5x8DOTS or
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LCD_5x10DOTS.
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*/
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virtual void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);
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/*!
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@function
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@abstract Send a particular value to the LCD.
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@discussion Sends a particular value to the LCD for writing to the LCD or
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as an LCD command.
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Users should never call this method.
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@param value[in] Value to send to the LCD.
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@param mode[in] DATA - write to the LCD CGRAM, COMMAND - write a
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command to the LCD.
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*/
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virtual void send(uint8_t value, uint8_t mode);
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/*!
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@function
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@abstract Switch-on/off the LCD backlight.
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@discussion Switch-on/off the LCD backlight.
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@param value: backlight mode (HIGH|LOW)
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*/
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void setBacklight ( uint8_t value );
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/*!
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@function
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@abstract Switch-on/off the LCD contrast.
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@discussion Switch-on/off the LCD contrast.
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@param value: contrast mode (HIGH|LOW)
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*/
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void setContrast ( uint8_t value );
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private:
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/*!
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@method
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@abstract Initializes the LCD class
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@discussion Initializes the LCD class and IO expansion module.
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*/
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int init();
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/*!
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@function
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@abstract Initialises class private variables
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@discussion This is the class single point for initialising private variables.
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@param lcd_Addr[in] I2C address of the IO expansion module. For BV4218,
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the address can be configured using the address commands.
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*/
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uint8_t _Addr; // I2C Address of the IO expander
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};
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#endif
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