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LiquidCrystal_I2C_ByVac.cpp
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LiquidCrystal_I2C_ByVac.cpp
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// ---------------------------------------------------------------------------
// Created by GHPS on 5/06/2012.
// Copyright 2012 - Under creative commons license 3.0:
// Attribution-ShareAlike CC BY-SA
//
// This software is furnished "as is", without technical support, and with no
// warranty, express or implied, as to its usefulness for any purpose.
//
// Thread Safe: No
// Extendable: Yes
//
// @file LiquidCrystal_I2C_ByVac.c
// This file implements a basic liquid crystal library that comes as standard
// in the Arduino SDK but using the extension board BV4218/BV4208 from ByVac.
//
// @brief
// This is a basic implementation of the LiquidCrystal library of the
// Arduino SDK. The original library has been reworked in such a way that
// this class implements the all methods to command an LCD based
// on the Hitachi HD44780 and compatible chipsets using I2C extension
// backpack BV4218 from ByVac.
//
// The functionality provided by this class and its base class is identical
// to the original functionality of the Arduino LiquidCrystal library.
//
// @author GHPS - ghps@users.sourceforge.net
// ---------------------------------------------------------------------------
#if (ARDUINO < 100)
#include <WProgram.h>
#else
#include <Arduino.h>
#endif
#include <inttypes.h>
#include "LiquidCrystal_I2C_ByVac.h"
// CONSTRUCTORS
// ---------------------------------------------------------------------------
LiquidCrystal_I2C_ByVac::LiquidCrystal_I2C_ByVac( uint8_t lcd_Addr )
{
_Addr = lcd_Addr;
_polarity = NEGATIVE;
}
// PUBLIC METHODS
// ---------------------------------------------------------------------------
//
// begin
void LiquidCrystal_I2C_ByVac::begin(uint8_t cols, uint8_t lines, uint8_t dotsize)
{
Wire.begin();
LCD::begin ( cols, lines, dotsize );
}
// User commands - users can expand this section
//----------------------------------------------------------------------------
// Turn the integrated backlight off/on
// setBacklight
void LiquidCrystal_I2C_ByVac::setBacklight( uint8_t value )
{
Wire.beginTransmission(_Addr);
Wire.write(0x03); // ByVac command code 0x03 for backlight
if (value==0) Wire.write(1); else Wire.write((byte)0); // 1 for off since polarity is NEGATIVE
Wire.endTransmission();
}
// Turn the contrast off/on
// setContrast
void LiquidCrystal_I2C_ByVac::setContrast( uint8_t value )
{
Wire.beginTransmission(_Addr);
Wire.write(0x05); // ByVac command code 0x05 for contrast
if (value==0) Wire.write((byte)0); else Wire.write(1);
Wire.endTransmission();
}
// PRIVATE METHODS
// ---------------------------------------------------------------------------
//
// init
int LiquidCrystal_I2C_ByVac::init()
{
int status = 0;
// ByVac backpack initialized by onboard firmware
// ------------------------------------------------------------------------
status=1;
return ( status );
}
// low level data pushing commands
//----------------------------------------------------------------------------
//
// send - write either command or data
void LiquidCrystal_I2C_ByVac::send(uint8_t value, uint8_t mode)
{
Wire.beginTransmission(_Addr);
Wire.write(mode+1); // map COMMAND (0) -> ByVac command code 0x01/ DATA (1) -> ByVac command code 0x02
Wire.write(value);
Wire.endTransmission();
}