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106 lines
3.3 KiB
C++
106 lines
3.3 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@users.sourceforge.net
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// ---------------------------------------------------------------------------
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#if (ARDUINO < 100)
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#include <WProgram.h>
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#else
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#include <Arduino.h>
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#endif
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#include <inttypes.h>
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#include "LiquidCrystal_I2C_ByVac.h"
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// CONSTRUCTORS
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// ---------------------------------------------------------------------------
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LiquidCrystal_I2C_ByVac::LiquidCrystal_I2C_ByVac( uint8_t lcd_Addr )
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{
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_Addr = lcd_Addr;
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_polarity == NEGATIVE;
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}
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// PUBLIC METHODS
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// ---------------------------------------------------------------------------
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//
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// begin
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void LiquidCrystal_I2C_ByVac::begin(uint8_t cols, uint8_t lines, uint8_t dotsize)
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{
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Wire.begin();
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LCD::begin ( cols, lines, dotsize );
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}
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// User commands - users can expand this section
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//----------------------------------------------------------------------------
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// Turn the integrated backlight off/on
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// setBacklight
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void LiquidCrystal_I2C_ByVac::setBacklight( uint8_t value )
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{
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Wire.beginTransmission(_Addr);
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Wire.write(0x03); // ByVac command code 0x03 for backlight
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if (value==0) Wire.write(1); else Wire.write((byte)0); // 1 for off since polarity is NEGATIVE
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Wire.endTransmission();
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}
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// Turn the contrast off/on
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// setContrast
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void LiquidCrystal_I2C_ByVac::setContrast( uint8_t value )
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{
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Wire.beginTransmission(_Addr);
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Wire.write(0x05); // ByVac command code 0x05 for contrast
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if (value==0) Wire.write((byte)0); else Wire.write(1);
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Wire.endTransmission();
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}
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// PRIVATE METHODS
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// ---------------------------------------------------------------------------
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//
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// init
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int LiquidCrystal_I2C_ByVac::init()
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{
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int status = 0;
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// ByVac backpack initialized by onboard firmware
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// ------------------------------------------------------------------------
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status=1;
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return ( status );
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}
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// low level data pushing commands
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//----------------------------------------------------------------------------
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//
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// send - write either command or data
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void LiquidCrystal_I2C_ByVac::send(uint8_t value, uint8_t mode)
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{
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Wire.beginTransmission(_Addr);
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Wire.write(mode+1); // map COMMAND (0) -> ByVac command code 0x01/ DATA (1) -> ByVac command code 0x02
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Wire.write(value);
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Wire.endTransmission();
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}
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