// YOU HAVE TO SET THE CPU FREQUENCY BECAUSE?YOU?ARE?USING
// PREDEFINED DELAY FUNCTION

#include <avr/io.h>    		// Standard AVR header
#include <util/delay.h>		// Delay header

#define	LCD_DPRT  PORTA 		//LCD DATA PORT	
#define	LCD_DDDR  DDRA 		//LCD DATA DDR
#define	LCD_DPIN  PINA 		//LCD DATA PIN
#define	LCD_CPRT  PORTC 		//LCD COMMANDS PORT
#define	LCD_CDDR  DDRC 		//LCD COMMANDS DDR
#define	LCD_CPIN  PINC 		//LCD COMMANDS PIN
#define	LCD_RS  4 			//LCD RS
#define	LCD_RW  5 			//LCD RW
#define	LCD_EN  6 			//LCD EN

//*******************************************************
void delay_us(unsigned int d)
{
  _delay_us(d);
}

//*******************************************************
void lcdCommand( unsigned char cmnd )
{
  LCD_DPRT = cmnd;			//send cmnd to data port
  LCD_CPRT &= ~ (1<<LCD_RS);	//RS = 0 for command
  LCD_CPRT &= ~ (1<<LCD_RW);	//RW = 0 for write 
  LCD_CPRT |= (1<<LCD_EN);		//EN = 1 for H-to-L pulse
  delay_us(1);				//wait to make enable wide
  LCD_CPRT &= ~ (1<<LCD_EN);	//EN = 0 for H-to-L pulse
  delay_us(100);				//wait to make enable wide
}

//*******************************************************
void lcdData( unsigned char data )
{
  LCD_DPRT = data;			//send data to data port
  LCD_CPRT |= (1<<LCD_RS);		//RS = 1 for data
  LCD_CPRT &= ~ (1<<LCD_RW);	//RW = 0 for write
  LCD_CPRT |= (1<<LCD_EN);		//EN = 1 for H-to-L pulse
  delay_us(1);				//wait to make enable wide
  LCD_CPRT &= ~ (1<<LCD_EN);	//EN = 0 for H-to-L pulse
  delay_us(100);				//wait to make enable wide
}

//*******************************************************
void lcd_init()
{
  LCD_DDDR = 0xFF;
  LCD_CDDR = 0xFF;
 
  LCD_CPRT &=~(1<<LCD_EN);		//LCD_EN = 0
//  LCD_CPRT |= (1<<7);		//LCD_EN = 0
  delay_us(2000);			//wait for init.
  lcdCommand(0x38);			//init. LCD 2 line, 5´7 matrix
  lcdCommand(0x0E);			//display on, cursor on
  lcdCommand(0x01);			//clear LCD
  delay_us(2000);			//wait
  lcdCommand(0x06);			//shift cusor right
}

//*******************************************************
void lcd_gotoxy(unsigned char x, unsigned char y)
{  
 unsigned char firstCharAdr[]={0x80,0xC0,0x94,0xD4};//table 12-5  
 lcdCommand(firstCharAdr[y-1] + x - 1);
 delay_us(100);	
}

//*******************************************************
void lcd_print( char * str )
{
  unsigned char i = 0 ;
  while(str[i]!=0)
  {
    lcdData(str[i]);
    i++ ;
  }
}

//*******************************************************
int main(void) 
{	
	lcd_init();
	lcd_gotoxy(1,1);
	lcd_print("The world is but");
	lcd_gotoxy(1,2);
	lcd_print("one country");
	
	while(1);				//stay here forever
    	return 0;
}