/**********************************************
LiquidCrystal_I2C
last?updated?on?21/12/2011
Tim?Starling?Fix?the?reset?bug?（Thanks?Tim）
www.yfrobot.com
**********************************************/


#include?“LiquidCrystal_I2C.h“
#include?
#if?defined（ARDUINO）?&&?ARDUINO?>=?100

#include?“Arduino.h“

#define?printIIC（args）	Wire.write（args）
inline?size_t?LiquidCrystal_I2C::write（uint8_t?value）?{
	send（value?Rs）;
	return?1;
}

#else
#include?“WProgram.h“

#define?printIIC（args）	Wire.send（args）
inline?void?LiquidCrystal_I2C::write（uint8_t?value）?{
	send（value?Rs）;
}

#endif
#include?“Wire.h“



//?When?the?display?powers?up?it?is?configured?as?follows:
//
//?1.?Display?clear
//?2.?Function?set:?
//????DL?=?1;?8-bit?interface?data?
//????N?=?0;?1-line?display?
//????F?=?0;?5x8?dot?character?font?
//?3.?Display?on/off?control:?
//????D?=?0;?Display?off?
//????C?=?0;?Cursor?off?
//????B?=?0;?blinking?off?
//?4.?Entry?mode?set:?
//????I/D?=?1;?Increment?by?1
//????S?=?0;?No?shift?
//
//?Note?however?that?resetting?the?Arduino?doesn‘t?reset?the?LCD?so?we
//?can‘t?assume?that?its?in?that?state?when?a?sketch?starts?（and?the
//?LiquidCrystal?constructor?is?called）.

LiquidCrystal_I2C::LiquidCrystal_I2C（uint8_t?lcd_Addruint8_t?lcd_colsuint8_t?lcd_rows）
{
??_Addr?=?lcd_Addr;
??_cols?=?lcd_cols;
??_rows?=?lcd_rows;
??_backlightval?=?LCD_NOBACKLIGHT;
}

void?LiquidCrystal_I2C::init（）{
	init_priv（）;
}

void?LiquidCrystal_I2C::init_priv（）
{
	Wire.begin（）;
	_displayfunction?=?LCD_4BITMODE?|?LCD_1LINE?|?LCD_5x8DOTS;
	begin（_cols?_rows）;??
}

void?LiquidCrystal_I2C::begin（uint8_t?cols?uint8_t?lines?uint8_t?dotsize）?{
	if?（lines?>?1）?{
		_displayfunction?|=?LCD_2LINE;
	}
	_numlines?=?lines;

	//?for?some?1?line?displays?you?can?select?a?10?pixel?high?font
	if?（（dotsize?!=?0）?&&?（lines?==?1））?{
		_displayfunction?|=?LCD_5x10DOTS;
	}

	//?SEE?PAGE?45/46?FOR?INITIALIZATION?SPECIFICATION!
	//?according?to?datasheet?we?need?at?least?40ms?after?power?rises?above?2.7V
	//?before?sending?commands.?Arduino?can?turn?on?way?befer?4.5V?so?we‘ll?wait?50
	delay（50）;?
??
	//?Now?we?pull?both?RS?and?R/W?low?to?begin?commands
	expanderWrite（_backlightval）;	//?reset?expanderand?turn?backlight?off?（Bit?8?=1）
	delay（1000）;

??	//put?the?LCD?into?4?bit?mode
	//?this?is?according?to?the?hitachi?HD44780?datasheet
	//?figure?24?pg?46
	
	??//?we?start?in?8bit?mode?try?to?set?4?bit?mode
???write4bits（0x03?<???delayMicroseconds（4500）;?//?wait?min?4.1ms
???
???//?second?try
???write4bits（0x03?<???delayMicroseconds（4500）;?//?wait?min?4.1ms
???
???//?third?go!
???write4bits（0x03?<???delayMicroseconds（150）;
???
???//?finally?set?to?4-bit?interface
???write4bits（0x02?<

	//?set?#?lines?font?size?etc.
	command（LCD_FUNCTIONSET?|?_displayfunction）;??
	
	//?turn?the?display?on?with?no?cursor?or?blinking?default
	_displaycontrol?=?L

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-03-31?21:33??lcd1602_proteus_arduino仿真\LiquidCrystal_I2C\
?????文件????????8758??2015-12-23?15:55??lcd1602_proteus_arduino仿真\LiquidCrystal_I2C\LiquidCrystal_I2C.cpp
?????文件????????3626??2013-12-26?19:25??lcd1602_proteus_arduino仿真\LiquidCrystal_I2C\LiquidCrystal_I2C.h
?????文件????????1095??2009-09-12?00:15??lcd1602_proteus_arduino仿真\LiquidCrystal_I2C\keywords.txt
?????文件???????28173??2019-03-31?21:16??lcd1602_proteus_arduino仿真\arduino_1602LCD_pcf8574.pdsprj
?????目錄???????????0??2019-03-31?21:33??lcd1602_proteus_arduino仿真\