Probleme beim ansteuern eines LCD TC1602A-09 + ATMEGA8

/** 

 *  @name  Definitions for MCU Clock Frequency

 *  Adapt the MCU clock frequency in Hz to your target. 

 */

#define XTAL 8000000              /**< clock frequency in Hz, used to calculate delay timer */

/**

 * @name  Definition for LCD controller type

 * Use 0 for HD44780 controller, change to 1 for displays with KS0073 controller.

 */

#define LCD_CONTROLLER_KS0073 0  /**< Use 0 for HD44780 controller, 1 for KS0073 controller */

/** 

 *  @name  Definitions for Display Size 

 *  Change these definitions to adapt setting to your display

 */

#define LCD_LINES          2    /**< number of visible lines of the display */

#define LCD_DISP_LENGTH    16     /**< visibles characters per line of the display */

#define LCD_LINE_LENGTH  0x40     /**< internal line length of the display    */

#define LCD_START_LINE1  0x00     /**< DDRAM address of first char of line 1 */

#define LCD_START_LINE2  0x40     /**< DDRAM address of first char of line 2 */

#define LCD_START_LINE3  0x14     /**< DDRAM address of first char of line 3 */

#define LCD_START_LINE4  0x54     /**< DDRAM address of first char of line 4 */

#define LCD_WRAP_LINES      0     /**< 0: no wrap, 1: wrap at end of visibile line */

#define LCD_IO_MODE      1         /**< 0: memory mapped mode, 1: IO port mode */

#if LCD_IO_MODE

/**

 *  @name Definitions for 4-bit IO mode

 *  Change LCD_PORT if you want to use a different port for the LCD pins.

 *

 *  The four LCD data lines and the three control lines RS, RW, E can be on the 

 *  same port or on different ports. 

 *  Change LCD_RS_PORT, LCD_RW_PORT, LCD_E_PORT if you want the control lines on

 *  different ports. 

 *

 *  Normally the four data lines should be mapped to bit 0..3 on one port, but it

 *  is possible to connect these data lines in different order or even on different

 *  ports by adapting the LCD_DATAx_PORT and LCD_DATAx_PIN definitions.

 *  

 */

#define LCD_PORT         PORTC        /**< port for the LCD lines   */

#define LCD_DATA0_PORT   LCD_PORT     /**< port for 4bit data bit 0 */

#define LCD_DATA1_PORT   LCD_PORT     /**< port for 4bit data bit 1 */

#define LCD_DATA2_PORT   LCD_PORT     /**< port for 4bit data bit 2 */

#define LCD_DATA3_PORT   LCD_PORT     /**< port for 4bit data bit 3 */

#define LCD_DATA0_PIN    4            /**< pin for 4bit data bit 0  */

#define LCD_DATA1_PIN    5            /**< pin for 4bit data bit 1  */

#define LCD_DATA2_PIN    6            /**< pin for 4bit data bit 2  */

#define LCD_DATA3_PIN    7            /**< pin for 4bit data bit 3  */

#define LCD_RS_PORT      LCD_PORT     /**< port for RS line         */

#define LCD_RS_PIN       3            /**< pin  for RS line         */

#define LCD_RW_PORT      LCD_PORT     /**< port for RW line         */

#define LCD_RW_PIN       2            /**< pin  for RW line         */

#define LCD_E_PORT       LCD_PORT     /**< port for Enable line     */

#define LCD_E_PIN        1            /**< pin  for Enable line     */

...

#include <avr/io.h>

#include <stdint.h>

#include <lcd.h>

DDRC = 0xff;

int main(void)

{

   while(1) 

   {

    /* Initialisiere Display, Cursor aus */

    lcd_init(LCD_DISP_ON);

    /* loesche das LCD Display und Cursor auf 1 Zeile, 1 Spalte */

    lcd_clrscr();

    /* String auf Display anzeigen */

    lcd_puts("Hello world.");

   }   

}