#include<avr/io.h>
#include<util/delay.h>


#define F_CPU 16000000UL	

#define LCD_Dir  DDRB			/* Define LCD data port direction */
#define LCD_Port PORTB			/* Define LCD data port */

#define RS PB5				/* Define Register Select pin */
#define EN PB4 				/* Define Enable signal pin */
#define out PORTD

void check()
{
out|=1<<7;
_delay_ms(100);

out&=~(1<<7);
_delay_ms(100);

}

void LCD_Command( unsigned char cmnd )
{
  check();
  _delay_ms(1);
	LCD_Port = (LCD_Port & 0xF0) | (cmnd >> 4); /* sending upper nibble */
	LCD_Port &= ~ (1<<RS);		/* RS=0, command reg. */
	LCD_Port |= (1<<EN);		/* Enable pulse */
	_delay_us(1);
	LCD_Port &= ~ (1<<EN);

	_delay_ms(200);

	LCD_Port = (LCD_Port & 0xF0) | (cmnd & 0x0F);  /* sending lower nibble */
	LCD_Port |= (1<<EN);
	_delay_us(1);
	LCD_Port &= ~ (1<<EN);
	_delay_ms(2);
}

void LCD_Char( unsigned char cmnd )
{
  check();
  _delay_ms(1);
	LCD_Port = (LCD_Port & 0xF0) | (cmnd >> 4); /* sending upper nibble */
	LCD_Port |= (1<<RS);		/* RS=1, data reg. */
	LCD_Port|= (1<<EN);
	_delay_us(1);
	LCD_Port &= ~ (1<<EN);

	_delay_us(200);

	LCD_Port = (LCD_Port & 0xF0) | (cmnd & 0x0F);  /* sending lower nibble */
	LCD_Port |= (1<<EN);
	_delay_us(1);
	LCD_Port &= ~ (1<<EN);
	_delay_ms(2);
}

void LCD_Init (void)			/* LCD Initialize function */
{
	LCD_Dir = 0xFF;			/* Make LCD port direction as o/p */
	_delay_ms(20);			/* LCD Power ON delay always >15ms */
	
	LCD_Command(0x02);		/* send for 4 bit initialization of LCD  */
  _delay_ms(5);
	LCD_Command(0x28);              /* 2 line, 5*7 matrix in 4-bit mode */
  _delay_ms(5);
	LCD_Command(0x0c);              /* Display on cursor off*/
  _delay_ms(5);
  _delay_ms(5);
	LCD_Command(0x06);              /* Increment cursor (shift cursor to right)*/
  _delay_ms(1);
   LCD_Command(0x0E);        // Display OFF, Cursor ON

  _delay_ms(5);
  	LCD_Command(0x83);
	LCD_Command(0x01);              /* Clear display screen*/
  _delay_ms(20);
	_delay_ms(2);

}

void LCD_String_xy (char row, char pos, char *str)	/* Send string to LCD with xy position */
{
	if (row == 0 && pos<16)
	LCD_Command((pos & 0x0F)|0x80);	/* Command of first row and required position<16 */
	else if (row == 1 && pos<16)
	LCD_Command((pos & 0x0F)|0xC0);	/* Command of first row and required position<16 */
	LCD_String(str);		/* Call LCD string function */
}

void LCD_String (char *str)		/* Send string to LCD function */
{
  _delay_ms(1);
	int i;
	for(i=0;str[i]!=0;i++)		/* Send each char of string till the NULL */
	{
    _delay_ms(1);
		LCD_Char (str[i]);
	}
}




int main()
{
  DDRD=0X80;
  PORTD=0x00;
LCD_Init();			/* Initialization of LCD*/
_delay_ms(1);
PORTB=0X00;

while(1)
{
LCD_Char('h');

	LCD_String("ElectronicWINGS");	/* Write string on 1st line of LCD*/
  _delay_ms(1);
	LCD_Command(0xC0);		/* Go to 2nd line*/
  _delay_ms(1);
	LCD_String("Hello World");	/* Write string on 2nd line*/
	// while(1);
check();
}
  return 0;
}