//HD44780 compatible LCD display via MAX3421E GPOUT support header
//pinout: D[4-7] -> GPOUT[4-7], RS-> GPOUT[2], E ->GPOUT[3]
//
//this code is heavily borrowed from official Arduino source v.0017
// link to original http://code.google.com/p/arduino/source/browse/trunk/hardware/libraries/LiquidCrystal/LiquidCrystal.h
//
#ifndef _Max_LCD_h_
#define _Max_LCD_h_

#include <inttypes.h>
#include "Print.h"
#include "Usb.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

class Max_LCD //: public Print 
{
	USB	*pUsb;

public:
	Max_LCD(USB *pusb);
	void init();
	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();
	void leftToRight();
	void rightToLeft();
	void autoscroll();
	void noAutoscroll();
	void createChar(uint8_t, uint8_t[]);
	void setCursor(uint8_t, uint8_t); 
	virtual void write(uint8_t);
	void command(uint8_t);

private:
	void sendbyte( uint8_t val );
	uint8_t _displayfunction; //tokill
	uint8_t _displaycontrol;
	uint8_t _displaymode;
	uint8_t _initialized;
	uint8_t _numlines,_currline;
};

#endif