F Malpartida avatar F Malpartida committed 1f3e40a

Created LiquidCristal_I2C class as a subclass of LiquidCrystal_I2C.

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Files changed (5)

 
 #ifndef _I2CIO_H_
 #define _I2CIO_H_
+
 #include <inttypes.h>
 
 #define _I2CIO_VERSION "1.0.0"

LiquidCrystal.cpp

 // LiquidCrystal constructor is called).
 
 LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
-			     uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
-			     uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
+                             uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
+                             uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
 {
-  init(0, rs, rw, enable, d0, d1, d2, d3, d4, d5, d6, d7);
+   init(0, rs, rw, enable, d0, d1, d2, d3, d4, d5, d6, d7);
 }
 
 LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t enable,
-			     uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
-			     uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
+                             uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
+                             uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
 {
-  init(0, rs, 255, enable, d0, d1, d2, d3, d4, d5, d6, d7);
+   init(0, rs, 255, enable, d0, d1, d2, d3, d4, d5, d6, d7);
 }
 
 LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
-			     uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
+                             uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
 {
-  init(1, rs, rw, enable, d0, d1, d2, d3, 0, 0, 0, 0);
+   init(1, rs, rw, enable, d0, d1, d2, d3, 0, 0, 0, 0);
 }
 
 LiquidCrystal::LiquidCrystal(uint8_t rs,  uint8_t enable,
-			     uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
+                             uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
 {
-  init(1, rs, 255, enable, d0, d1, d2, d3, 0, 0, 0, 0);
+   init(1, rs, 255, enable, d0, d1, d2, d3, 0, 0, 0, 0);
+}
+
+LiquidCrystal::LiquidCrystal ()
+{
+   
 }
 
 void LiquidCrystal::init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
-			 uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
-			 uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
+                         uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
+                         uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
 {
-  _rs_pin = rs;
-  _rw_pin = rw;
-  _enable_pin = enable;
-  
-  _data_pins[0] = d0;
-  _data_pins[1] = d1;
-  _data_pins[2] = d2;
-  _data_pins[3] = d3; 
-  _data_pins[4] = d4;
-  _data_pins[5] = d5;
-  _data_pins[6] = d6;
-  _data_pins[7] = d7; 
-
-  pinMode(_rs_pin, OUTPUT);
-  // we can save 1 pin by not using RW. Indicate by passing 255 instead of pin#
-  if (_rw_pin != 255) { 
-    pinMode(_rw_pin, OUTPUT);
-  }
-  pinMode(_enable_pin, OUTPUT);
-  
-  if (fourbitmode)
-    _displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
-  else 
-    _displayfunction = LCD_8BITMODE | LCD_1LINE | LCD_5x8DOTS;
-  
-  begin(16, 1);
+   _rs_pin = rs;
+   _rw_pin = rw;
+   _enable_pin = enable;
+   
+   _data_pins[0] = d0;
+   _data_pins[1] = d1;
+   _data_pins[2] = d2;
+   _data_pins[3] = d3; 
+   _data_pins[4] = d4;
+   _data_pins[5] = d5;
+   _data_pins[6] = d6;
+   _data_pins[7] = d7; 
+   
+   pinMode(_rs_pin, OUTPUT);
+   // we can save 1 pin by not using RW. Indicate by passing 255 instead of pin#
+   if (_rw_pin != 255) { 
+      pinMode(_rw_pin, OUTPUT);
+   }
+   pinMode(_enable_pin, OUTPUT);
+   
+   if (fourbitmode)
+      _displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
+   else 
+      _displayfunction = LCD_8BITMODE | LCD_1LINE | LCD_5x8DOTS;
+   
+   begin(16, 1);
 }
 
 void LiquidCrystal::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) 
 {
-  if (lines > 1) 
-  {
-    _displayfunction |= LCD_2LINE;
-  }
-  _numlines = lines;
-  _currline = 0;
-
-  // 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
-  delayMicroseconds(50000); 
-  // Now we pull both RS and R/W low to begin commands
-  digitalWrite(_rs_pin, LOW);
-  digitalWrite(_enable_pin, LOW);
-  if (_rw_pin != 255) { 
-    digitalWrite(_rw_pin, LOW);
-  }
-  
-  //put the LCD into 4 bit or 8 bit mode
-  if (! (_displayfunction & LCD_8BITMODE)) {
-    // 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); 
-  } else {
-    // this is according to the hitachi HD44780 datasheet
-    // page 45 figure 23
-
-    // Send function set command sequence
-    command(LCD_FUNCTIONSET | _displayfunction);
-    delayMicroseconds(4500);  // wait more than 4.1ms
-
-    // second try
-    command(LCD_FUNCTIONSET | _displayfunction);
-    delayMicroseconds(150);
-
-    // third go
-    command(LCD_FUNCTIONSET | _displayfunction);
-  }
-
-  // finally, set # lines, font size, etc.
-  command(LCD_FUNCTIONSET | _displayfunction);  
-
-  // turn the display on with no cursor or blinking default
-  _displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;  
-  display();
-
-  // clear it off
-  clear();
-
-  // Initialize to default text direction (for romance languages)
-  _displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
-  // set the entry mode
-  command(LCD_ENTRYMODESET | _displaymode);
-
+   if (lines > 1) 
+   {
+      _displayfunction |= LCD_2LINE;
+   }
+   _numlines = lines;
+   _currline = 0;
+   
+   // 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
+   delayMicroseconds(50000); 
+   // Now we pull both RS and R/W low to begin commands
+   digitalWrite(_rs_pin, LOW);
+   digitalWrite(_enable_pin, LOW);
+   if (_rw_pin != 255) { 
+      digitalWrite(_rw_pin, LOW);
+   }
+   
+   //put the LCD into 4 bit or 8 bit mode
+   if (! (_displayfunction & LCD_8BITMODE)) {
+      // 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); 
+   } else {
+      // this is according to the hitachi HD44780 datasheet
+      // page 45 figure 23
+      
+      // Send function set command sequence
+      command(LCD_FUNCTIONSET | _displayfunction);
+      delayMicroseconds(4500);  // wait more than 4.1ms
+      
+      // second try
+      command(LCD_FUNCTIONSET | _displayfunction);
+      delayMicroseconds(150);
+      
+      // third go
+      command(LCD_FUNCTIONSET | _displayfunction);
+   }
+   
+   // finally, set # lines, font size, etc.
+   command(LCD_FUNCTIONSET | _displayfunction);  
+   
+   // turn the display on with no cursor or blinking default
+   _displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;  
+   display();
+   
+   // clear it off
+   clear();
+   
+   // Initialize to default text direction (for romance languages)
+   _displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
+   // set the entry mode
+   command(LCD_ENTRYMODESET | _displaymode);
+   
 }
 
 /********** high level commands, for the user! */
 void LiquidCrystal::clear()
 {
-  command(LCD_CLEARDISPLAY);  // clear display, set cursor position to zero
-  delayMicroseconds(2000);  // this command takes a long time!
+   command(LCD_CLEARDISPLAY);  // clear display, set cursor position to zero
+   delayMicroseconds(2000);  // this command takes a long time!
 }
 
 void LiquidCrystal::home()
 {
-  command(LCD_RETURNHOME);  // set cursor position to zero
-  delayMicroseconds(2000);  // this command takes a long time!
+   command(LCD_RETURNHOME);  // set cursor position to zero
+   delayMicroseconds(2000);  // this command takes a long time!
 }
 
 void LiquidCrystal::setCursor(uint8_t col, uint8_t row)
 {
-  int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
-  if ( row > _numlines ) {
-    row = _numlines-1;    // we count rows starting w/0
-  }
-  
-  command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
+   int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
+   if ( row > _numlines ) 
+   {
+      row = _numlines-1;    // we count rows starting w/0
+   }
+   
+   command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
 }
 
 // Turn the display on/off (quickly)
 void LiquidCrystal::noDisplay() 
 {
-  _displaycontrol &= ~LCD_DISPLAYON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
+   _displaycontrol &= ~LCD_DISPLAYON;
+   command(LCD_DISPLAYCONTROL | _displaycontrol);
 }
 
 void LiquidCrystal::display() 
 {
-  _displaycontrol |= LCD_DISPLAYON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
+   _displaycontrol |= LCD_DISPLAYON;
+   command(LCD_DISPLAYCONTROL | _displaycontrol);
 }
 
 // Turns the underline cursor on/off
 void LiquidCrystal::noCursor() 
 {
-  _displaycontrol &= ~LCD_CURSORON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
+   _displaycontrol &= ~LCD_CURSORON;
+   command(LCD_DISPLAYCONTROL | _displaycontrol);
 }
 void LiquidCrystal::cursor() {
-  _displaycontrol |= LCD_CURSORON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
+   _displaycontrol |= LCD_CURSORON;
+   command(LCD_DISPLAYCONTROL | _displaycontrol);
 }
 
 // Turn on and off the blinking cursor
 void LiquidCrystal::noBlink() {
-  _displaycontrol &= ~LCD_BLINKON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
+   _displaycontrol &= ~LCD_BLINKON;
+   command(LCD_DISPLAYCONTROL | _displaycontrol);
 }
 void LiquidCrystal::blink() {
-  _displaycontrol |= LCD_BLINKON;
-  command(LCD_DISPLAYCONTROL | _displaycontrol);
+   _displaycontrol |= LCD_BLINKON;
+   command(LCD_DISPLAYCONTROL | _displaycontrol);
 }
 
 // These commands scroll the display without changing the RAM
 void LiquidCrystal::scrollDisplayLeft(void) {
-  command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
+   command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
 }
 void LiquidCrystal::scrollDisplayRight(void) {
-  command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
+   command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
 }
 
 // This is for text that flows Left to Right
 void LiquidCrystal::leftToRight(void) 
 {
-  _displaymode |= LCD_ENTRYLEFT;
-  command(LCD_ENTRYMODESET | _displaymode);
+   _displaymode |= LCD_ENTRYLEFT;
+   command(LCD_ENTRYMODESET | _displaymode);
 }
 
 // This is for text that flows Right to Left
 void LiquidCrystal::rightToLeft(void) {
-  _displaymode &= ~LCD_ENTRYLEFT;
-  command(LCD_ENTRYMODESET | _displaymode);
+   _displaymode &= ~LCD_ENTRYLEFT;
+   command(LCD_ENTRYMODESET | _displaymode);
 }
 
 // This will 'right justify' text from the cursor
 void LiquidCrystal::autoscroll(void) {
-  _displaymode |= LCD_ENTRYSHIFTINCREMENT;
-  command(LCD_ENTRYMODESET | _displaymode);
+   _displaymode |= LCD_ENTRYSHIFTINCREMENT;
+   command(LCD_ENTRYMODESET | _displaymode);
 }
 
 // This will 'left justify' text from the cursor
 void LiquidCrystal::noAutoscroll(void) {
-  _displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
-  command(LCD_ENTRYMODESET | _displaymode);
+   _displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
+   command(LCD_ENTRYMODESET | _displaymode);
 }
 
 // Allows us to fill the first 8 CGRAM locations
 // with custom characters
 void LiquidCrystal::createChar(uint8_t location, uint8_t charmap[]) {
-  location &= 0x7; // we only have 8 locations 0-7
-  command(LCD_SETCGRAMADDR | (location << 3));
-  for (int i=0; i<8; i++) {
-    write(charmap[i]);
-  }
+   location &= 0x7; // we only have 8 locations 0-7
+   command(LCD_SETCGRAMADDR | (location << 3));
+   for (int i=0; i<8; i++) {
+      write(charmap[i]);
+   }
 }
 
 /*********** mid level commands, for sending data/cmds */
 
-inline void LiquidCrystal::command(uint8_t value) {
-  send(value, LOW);
+void LiquidCrystal::command(uint8_t value) {
+   send(value, LOW);
 }
 
-inline size_t LiquidCrystal::write(uint8_t value) {
-  send(value, HIGH);
-  return 1; // assume sucess
+size_t LiquidCrystal::write(uint8_t value) {
+   send(value, HIGH);
+   return 1; // assume sucess
 }
 
 /************ low level data pushing commands **********/
 
 // write either command or data, with automatic 4/8-bit selection
 void LiquidCrystal::send(uint8_t value, uint8_t mode) {
-  digitalWrite(_rs_pin, mode);
-
-  // if there is a RW pin indicated, set it low to Write
-  if (_rw_pin != 255) { 
-    digitalWrite(_rw_pin, LOW);
-  }
-  
-  if (_displayfunction & LCD_8BITMODE) {
-    write8bits(value); 
-  } else {
-    write4bits(value>>4);
-    write4bits(value);
-  }
+   digitalWrite(_rs_pin, mode);
+   
+   // if there is a RW pin indicated, set it low to Write
+   if (_rw_pin != 255) { 
+      digitalWrite(_rw_pin, LOW);
+   }
+   
+   if (_displayfunction & LCD_8BITMODE) {
+      write8bits(value); 
+   } else {
+      write4bits(value>>4);
+      write4bits(value);
+   }
 }
 
 void LiquidCrystal::pulseEnable(void) {
-  digitalWrite(_enable_pin, LOW);
-  delayMicroseconds(1);    
-  digitalWrite(_enable_pin, HIGH);
-  delayMicroseconds(1);    // enable pulse must be >450ns
-  digitalWrite(_enable_pin, LOW);
-  delayMicroseconds(100);   // commands need > 37us to settle
+   digitalWrite(_enable_pin, LOW);
+   delayMicroseconds(1);    
+   digitalWrite(_enable_pin, HIGH);
+   delayMicroseconds(1);    // enable pulse must be >450ns
+   digitalWrite(_enable_pin, LOW);
+   delayMicroseconds(100);   // commands need > 37us to settle
 }
 
 void LiquidCrystal::write4bits(uint8_t value) {
-  for (int i = 0; i < 4; i++) {
-    pinMode(_data_pins[i], OUTPUT);
-    digitalWrite(_data_pins[i], (value >> i) & 0x01);
-  }
-
-  pulseEnable();
+   for (int i = 0; i < 4; i++) {
+      pinMode(_data_pins[i], OUTPUT);
+      digitalWrite(_data_pins[i], (value >> i) & 0x01);
+   }
+   
+   pulseEnable();
 }
 
 void LiquidCrystal::write8bits(uint8_t value) {
-  for (int i = 0; i < 8; i++) {
-    pinMode(_data_pins[i], OUTPUT);
-    digitalWrite(_data_pins[i], (value >> i) & 0x01);
-  }
-  
-  pulseEnable();
+   for (int i = 0; i < 8; i++) {
+      pinMode(_data_pins[i], OUTPUT);
+      digitalWrite(_data_pins[i], (value >> i) & 0x01);
+   }
+   
+   pulseEnable();
 }
 		uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);
   LiquidCrystal(uint8_t rs, uint8_t enable,
 		uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);
+   
+  LiquidCrystal ( );
 
   void init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
 	    uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
   void noAutoscroll();
 
   void createChar(uint8_t, uint8_t[]);
-  void setCursor(uint8_t, uint8_t); 
-  virtual size_t write(uint8_t);
+  void setCursor(uint8_t, uint8_t);
+   
+  size_t write(uint8_t);
   void command(uint8_t);
-  
+   
+  virtual void send(uint8_t, uint8_t);
+  virtual void write4bits(uint8_t);
+  virtual void pulseEnable();
+
   using Print::write;
+
+protected: 
+  uint8_t _numlines;
+  uint8_t _displayfunction;
+  uint8_t _displaycontrol;
+  uint8_t _displaymode;
+   
 private:
-  void send(uint8_t, uint8_t);
-  void write4bits(uint8_t);
   void write8bits(uint8_t);
-  void pulseEnable();
 
   uint8_t _rs_pin; // LOW: command.  HIGH: character.
   uint8_t _rw_pin; // LOW: write to LCD.  HIGH: read from LCD.
   uint8_t _enable_pin; // activated by a HIGH pulse.
   uint8_t _data_pins[8];
 
-  uint8_t _displayfunction;
-  uint8_t _displaycontrol;
-  uint8_t _displaymode;
 
+  uint8_t _currline;
   uint8_t _initialized;
 
-  uint8_t _numlines,_currline;
+
 };
 
 #endif

LiquidCrystal_I2C.cpp

   
 }
 
+/*********** mid level commands, for sending data/cmds */
 
 
+/************ low level data pushing commands **********/
+
+// write either command or data
+void LiquidCrystal_I2C::send(uint8_t value, uint8_t mode) 
+{
+   if ( mode == HIGH )
+   {
+      mode = Rs;
+   }
+
+	uint8_t highnib=value>>4;
+	uint8_t lownib=value & 0x0F;
+   
+	write4bits((highnib)|mode);
+	write4bits((lownib)|mode);
+}
+
+void LiquidCrystal_I2C::write4bits(uint8_t value) 
+{
+	expanderWrite(value);
+	pulseEnable(value);
+}
+
+void LiquidCrystal_I2C::pulseEnable(uint8_t _data)
+{
+	expanderWrite(_data | En);	// En high
+	delayMicroseconds(1);		// enable pulse must be >450ns
+	
+	expanderWrite(_data & ~En);  // En low
+	delayMicroseconds(50);		  // commands need > 37us to settle
+} 
+
 /********** high level commands, for the user! */
-void LiquidCrystal_I2C::clear()
-{
-	command(LCD_CLEARDISPLAY);// clear display, set cursor position to zero
-	delayMicroseconds(2000);  // this command takes a long time!
-}
 
-void LiquidCrystal_I2C::home()
-{
-	command(LCD_RETURNHOME);  // set cursor position to zero
-	delayMicroseconds(2000);  // this command takes a long time!
-}
-
-void LiquidCrystal_I2C::setCursor(uint8_t col, uint8_t row)
-{
-	int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
-	if ( row > _numlines ) {
-		row = _numlines-1;    // we count rows starting w/0
-	}
-	command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
-}
-
-// Turn the display on/off (quickly)
-void LiquidCrystal_I2C::noDisplay() 
-{
-	_displaycontrol &= ~LCD_DISPLAYON;
-	command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-
-void LiquidCrystal_I2C::display() 
-{
-	_displaycontrol |= LCD_DISPLAYON;
-	command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-
-// Turns the underline cursor on/off
-void LiquidCrystal_I2C::noCursor() 
-{
-	_displaycontrol &= ~LCD_CURSORON;
-	command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-void LiquidCrystal_I2C::cursor() 
-{
-	_displaycontrol |= LCD_CURSORON;
-	command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-
-// Turn on and off the blinking cursor
-void LiquidCrystal_I2C::noBlink() 
-{
-	_displaycontrol &= ~LCD_BLINKON;
-	command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-void LiquidCrystal_I2C::blink() 
-{
-	_displaycontrol |= LCD_BLINKON;
-	command(LCD_DISPLAYCONTROL | _displaycontrol);
-}
-
-// These commands scroll the display without changing the RAM
-void LiquidCrystal_I2C::scrollDisplayLeft(void) 
-{
-	command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
-}
-
-void LiquidCrystal_I2C::scrollDisplayRight(void) 
-{
-	command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
-}
-
-// This is for text that flows Left to Right
-void LiquidCrystal_I2C::leftToRight(void) 
-{
-	_displaymode |= LCD_ENTRYLEFT;
-	command(LCD_ENTRYMODESET | _displaymode);
-}
-
-// This is for text that flows Right to Left
-void LiquidCrystal_I2C::rightToLeft(void) 
-{
-	_displaymode &= ~LCD_ENTRYLEFT;
-	command(LCD_ENTRYMODESET | _displaymode);
-}
-
-// This will 'right justify' text from the cursor
-void LiquidCrystal_I2C::autoscroll(void) 
-{
-	_displaymode |= LCD_ENTRYSHIFTINCREMENT;
-	command(LCD_ENTRYMODESET | _displaymode);
-}
-
-// This will 'left justify' text from the cursor
-void LiquidCrystal_I2C::noAutoscroll(void) 
-{
-	_displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
-	command(LCD_ENTRYMODESET | _displaymode);
-}
-
-// Allows us to fill the first 8 CGRAM locations
-// with custom characters
-void LiquidCrystal_I2C::createChar(uint8_t location, uint8_t charmap[]) 
-{
-	location &= 0x7; // we only have 8 locations 0-7
-	command(LCD_SETCGRAMADDR | (location << 3));
-	for (int i=0; i<8; i++) {
-		write(charmap[i]);
-	}
-}
 
 // Turn the (optional) backlight off/on
 void LiquidCrystal_I2C::noBacklight(void) 
 
 
 
-/*********** mid level commands, for sending data/cmds */
-
-inline void LiquidCrystal_I2C::command(uint8_t value) 
-{
-	send(value, 0);
-}
-
-inline size_t LiquidCrystal_I2C::write(uint8_t value) 
-{
-	send(value, Rs);
-}
-
 
 
 /************ low level data pushing commands **********/
 
-// write either command or data
-void LiquidCrystal_I2C::send(uint8_t value, uint8_t mode) {
-	uint8_t highnib=value>>4;
-	uint8_t lownib=value & 0x0F;
-	write4bits((highnib)|mode);
-	write4bits((lownib)|mode);
-}
-
-void LiquidCrystal_I2C::write4bits(uint8_t value) {
-	expanderWrite(value);
-	pulseEnable(value);
-}
-
-void LiquidCrystal_I2C::pulseEnable(uint8_t _data){
-	expanderWrite(_data | En);	// En high
-	delayMicroseconds(1);		// enable pulse must be >450ns
-	
-	expanderWrite(_data & ~En);  // En low
-	delayMicroseconds(50);		  // commands need > 37us to settle
-} 
-
 void LiquidCrystal_I2C::expanderWrite(uint8_t _data)
 {                                        
    _i2cio.write ( _data );
 }
 
-// Alias functions
-
-void LiquidCrystal_I2C::cursor_on()
-{
-	cursor();
-}
-
-void LiquidCrystal_I2C::cursor_off()
-{
-	noCursor();
-}
-
-void LiquidCrystal_I2C::blink_on()
-{
-	blink();
-}
-
-void LiquidCrystal_I2C::blink_off()
-{
-	noBlink();
-}
-
-void LiquidCrystal_I2C::load_custom_character(uint8_t char_num, uint8_t *rows)
-{
-		createChar(char_num, rows);
-}
-
-void LiquidCrystal_I2C::setBacklight(uint8_t new_val)
-{
-	if(new_val){
-		backlight();		// turn backlight on
-	}else{
-		noBacklight();		// turn backlight off
-	}
-}
-
-void LiquidCrystal_I2C::printstr(const char c[])
-{
-	//This function is not identical to the function used for "real" I2C displays
-	//it's here so the user sketch doesn't have to be changed 
-	print(c);
-}
-
-
-// unsupported API functions
-void LiquidCrystal_I2C::off(){}
-void LiquidCrystal_I2C::on(){}
-void LiquidCrystal_I2C::setDelay (int cmdDelay,int charDelay) {}
-uint8_t LiquidCrystal_I2C::status(){return 0;}
-uint8_t LiquidCrystal_I2C::keypad (){return 0;}
-uint8_t LiquidCrystal_I2C::init_bargraph(uint8_t graphtype){return 0;}
-void LiquidCrystal_I2C::draw_horizontal_graph(uint8_t row, uint8_t column, uint8_t len,  uint8_t pixel_col_end){}
-void LiquidCrystal_I2C::draw_vertical_graph(uint8_t row, uint8_t column, uint8_t len,  uint8_t pixel_row_end){}
-void LiquidCrystal_I2C::setContrast(uint8_t new_val){}
-
 	

LiquidCrystal_I2C.h

 #define LiquidCrystal_I2C_h
 
 #include <inttypes.h>
-#include "Print.h" 
+#include "Print.h"
+#include "LiquidCrystal.h"
 #include <Wire.h>
-#include <LiquidCrystal.h"
 #include <I2CIO.h>
 
 // commands
-#define LCD_CLEARDISPLAY 0x01
-#define LCD_RETURNHOME 0x02
-#define LCD_ENTRYMODESET 0x04
-#define LCD_DISPLAYCONTROL 0x08
-#define LCD_CURSORSHIFT 0x10
-#define LCD_FUNCTIONSET 0x20
-#define LCD_SETCGRAMADDR 0x40
-#define LCD_SETDDRAMADDR 0x80
 
 // flags for display entry mode
-#define LCD_ENTRYRIGHT 0x00
-#define LCD_ENTRYLEFT 0x02
-#define LCD_ENTRYSHIFTINCREMENT 0x01
-#define LCD_ENTRYSHIFTDECREMENT 0x00
+
 
 // flags for display on/off control
-#define LCD_DISPLAYON 0x04
-#define LCD_DISPLAYOFF 0x00
-#define LCD_CURSORON 0x02
-#define LCD_CURSOROFF 0x00
-#define LCD_BLINKON 0x01
-#define LCD_BLINKOFF 0x00
+
 
 // flags for display/cursor shift
-#define LCD_DISPLAYMOVE 0x08
-#define LCD_CURSORMOVE 0x00
-#define LCD_MOVERIGHT 0x04
-#define LCD_MOVELEFT 0x00
+
 
 // flags for function set
-#define LCD_8BITMODE 0x10
-#define LCD_4BITMODE 0x00
-#define LCD_2LINE 0x08
-#define LCD_1LINE 0x00
-#define LCD_5x10DOTS 0x04
-#define LCD_5x8DOTS 0x00
+
 
 // flags for backlight control
 #define LCD_BACKLIGHT 0x00
 #define Rw B00100000  // Read/Write bit
 #define Rs B00010000  // Register select bit
 
-class LiquidCrystal_I2C : public Print : public LiquidCristal {
+class LiquidCrystal_I2C : public LiquidCrystal 
+{
 public:
-   LiquidCrystal_I2C(uint8_t lcd_Addr,uint8_t lcd_cols,uint8_t lcd_rows);
-   void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS );
-   void clear();
-   void home();
-   void noDisplay();
-   void display();
-   void noBlink();
-   void blink();
-   void noCursor();
-   void cursor();
-   void scrollDisplayLeft();
-   void scrollDisplayRight();
+   LiquidCrystal_I2C (uint8_t lcd_Addr,uint8_t lcd_cols,uint8_t lcd_rows);
+   int init();
+   
+   // Virtual methods
+   virtual void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS );
+   virtual void send(uint8_t, uint8_t);
+   virtual void write4bits(uint8_t);
+   virtual void pulseEnable(uint8_t);
+
    void printLeft();
    void printRight();
-   void leftToRight();
-   void rightToLeft();
    void shiftIncrement();
    void shiftDecrement();
    void noBacklight();
    void backlight();
-   void autoscroll();
-   void noAutoscroll(); 
-   void createChar(uint8_t, uint8_t[]);
-   void setCursor(uint8_t, uint8_t); 
-   virtual size_t write(uint8_t);
-   void command(uint8_t);
-   int init();
-   
-   ////compatibility API function aliases
-   void blink_on();						// alias for blink()
-   void blink_off();       					// alias for noBlink()
-   void cursor_on();      	 					// alias for cursor()
-   void cursor_off();      					// alias for noCursor()
-   void setBacklight(uint8_t new_val);				// alias for backlight() and nobacklight()
-   void load_custom_character(uint8_t char_num, uint8_t *rows);	// alias for createChar()
-   void printstr(const char[]);
-   
-   ////Unsupported API functions (not implemented in this library)
-   uint8_t status();
-   void setContrast(uint8_t new_val);
-   uint8_t keypad();
-   void setDelay(int,int);
-   void on();
-   void off();
-   uint8_t init_bargraph(uint8_t graphtype);
-   void draw_horizontal_graph(uint8_t row, uint8_t column, uint8_t len,  uint8_t pixel_col_end);
-   void draw_vertical_graph(uint8_t row, uint8_t column, uint8_t len,  uint8_t pixel_col_end);
-   
    
 private:
    int  init_priv();
-   void send(uint8_t, uint8_t);
-   void write4bits(uint8_t);
+
    void expanderWrite(uint8_t);
-   void pulseEnable(uint8_t);
+
    uint8_t _Addr;
-   uint8_t _displayfunction;
-   uint8_t _displaycontrol;
-   uint8_t _displaymode;
-   uint8_t _numlines;
    uint8_t _cols;
    uint8_t _rows;
    uint8_t _backlightval;
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