#include <avr/io.h>
#include <util/delay.h>
#include "lcd-routines.h"

static void lcd_out( uint8_t data );
void lcd_data( uint8_t data );
void lcd_command( uint8_t data );



void lcd_data( uint8_t data )			 
{
    LCD_PORT |= (1<<LCD_RS);
	 
    lcd_out( data>>4 );
	_delay_ms(150);	        		 
    lcd_out( data ); 
	
	 
	_delay_us( 5 );      			 
 	LCD_PORT &= ~(1<<LCD_RS); 	
	
}

void lcd_command( uint8_t data )						 
{
    LCD_PORT &= ~(1<<LCD_RS);					// Beim Senden eines Befehls RS=0
	 
    lcd_out( data>>4 );	        		 
    lcd_out( data);	
	_delay_us(45);
}


static void lcd_out( uint8_t data )
{	
	data &= 0x0F;   
 	    
    LCD_PORT |= data;  
	   						
    _delay_us(2);
			

	LCD_PORT |= (1<<LCD_EN);
	_delay_us(1);		
	LCD_PORT &= ~(1<<LCD_EN);

	LCD_PORT &= 0xF0;	 						// PORT (PD0 - PD3) auf 0 zu setzen   				
	//_delay_ms(200);	
}


int main(void)
{
 
  												
    uint8_t pins = (0x0F << LCD_DB) |           // pins = 0011 1111 
                      (1<<LCD_RS) |           	  
                   	(1<<LCD_EN);                
    
	LCD_DDR |= pins;							// DDRD = 0b00111111 (PINS sind Ausgänge)    
    LCD_PORT =0x00;								// initialisierung alle Ausgänge auf Null 
	 	
    _delay_ms(15);   						 
	
    lcd_out(0x03);
	
	_delay_ms(5);
									
	lcd_out(0x03);   				

	_delay_us(100);								
	
	lcd_out(0x03);  				

/////////////////////////////////////////////////////////////////////////////////			

 	lcd_out( 0x02 );							// hier wird der 4 Bit Modus aktiviert
	_delay_ms(5);								// ab hier sende ich zweimal 4 Bit 

	lcd_command( 0x28 );						// 4-bit Modus / 2 Zeilen / 5x8
	 

	lcd_command( 0x0C );						// Display ein / Cursor aus / Blinken aus							
	

	lcd_command( 0x06 );						// Cursor inkrement / kein Scrollen							
	
	
	lcd_command( 0x01 );						// Display clear




	//lcd_data( 'h' );
	//_delay_ms(50);


while(1)
  {
	lcd_data( 'w' );
	_delay_ms(150);
	_delay_ms(150);
	_delay_ms(150);


	}

return 0;
}