atmega8 mk2 und lcd keine ausgabe

Hallo, wollte ein Programm zur Ansteuerung eines LCD Displays. Habe mir 
dazu was abgetippt, bekom aber keine gescheite ausgabe ins display. 
vielleicht kann wer helfen würd mich freuen.
Hier mein Code in c:

#define F_CPU 3686400
#include <avr\io.h>
#include <util\delay.h>

void wait_ms (int miliSec)
{
  _delay_loop_2(1*(F_CPU/(1000/4))*miliSec);
  }

void wait_us (int mikroSec)
{
  _delay_loop_2(1*(F_CPU/(1000000/4))*mikroSec);
  }


void lcd_init()
{
  DDRD=0x0ff;
  PORTD=0;

  wait_ms(50);

  PORTD=0x30;

  PORTD|=(1<<3);
  PORTD&=~(1<<3);

  wait_ms(5);


  PORTD=0x30;

  PORTD|=(1<<3);
  PORTD&=~(1<<3);

  for (int i=0;i<100;i++);

  PORTD=0x30;

  PORTD|=(1<<3);
  PORTD&=~(1<<3);

  wait_ms(5);


  PORTD=0x20;

  PORTD|=(1<<3);
  PORTD&=~(1<<3);

  wait_ms(5);

  lcd_cmd(0x28);
  lcd_off();
  lcd_clear();

  lcd_cmd(0x06);
  lcd_on();
}


void lcd_send(char data)
{
  char rs=PORTD;
  rs&=4;

  char tmp=data;
  tmp&=0xf0;
  tmp|=rs;
  PORTD=tmp;

  PORTD|=(1<<3);
  PORTD&=~(1<<3);

  tmp=data;
  tmp&=0x0f;
  tmp*=16;
  tmp|=rs;
  PORTD=tmp;

  PORTD|=(1<<3);
  PORTD&=~(1<<3);

  wait_ms(2);
}

void lcd_cmd(char cmd)
{
  PORTD&=~(1<<2);
  lcd_send(cmd);
}

void lcd_clear()
{
  lcd_cmd(0x01);
  wait_ms(2);
}

void lcd_home()
{
  lcd_cmd(0x02);
  wait_ms(2);
}

void lcd_on()
{
  lcd_cmd(0x0E);
}

void lcd_off()

{
  lcd_cmd(0x08);
}

void lcd_goto(int row, int col)
{
  row--;
  row&=0x01;
  row*=40;
  col--;
  col&=0x0f;
  char tmp=row|col;
  tmp|=0x08;
  lcd_cmd(tmp);
}

void lcd_write(char text)
{
  PORTD|=(1<<2);
  lcd_send(text);
}


int main (void)
{


  wait_ms(200);
  lcd_init();
  wait_ms(100);

  while(1)
  {
  lcd_write("hallo");
  wait_ms(100);
  //lcd_clear();
  //lcd_home();
  }
  return 0;}

danke