KS0066 mit ATMega32 ansteuern

void lcd_init( void )

{

  // verwendete Pins auf Ausgang schalten

    uint8_t pins = (0x0F << LCD_DB) |           // 4 Datenleitungen

                   (1<<LCD_RS) |                // R/S Leitung

                   (1<<LCD_EN);                 // Enable Leitung

    LCD_DDR |= pins;

  LCD_PORT &= ~(1<<LCD_RS);      // RS auf 0, "Befehl"

  // Function set

  LCD_PORT |= (0x03 << LCD_DB);

  lcd_enable();

  LCD_PORT |= (0x03 << LCD_DB);

  lcd_enable();

  LCD_PORT |= (0x03 << LCD_DB);

  lcd_enable();

  _delay_ms(1);

  // Display on/off control 

  LCD_PORT = (0x00 << LCD_DB);

  lcd_enable();

  LCD_PORT |= (0x0F << LCD_DB);

  lcd_enable();

  _delay_ms(1);

  // entry mode

  LCD_PORT = (0x00 << LCD_DB);

  lcd_enable();

  LCD_PORT |= (0x01 << LCD_DB);

  lcd_enable();

  _delay_ms(1);

  // entry mode

  LCD_PORT = (0x00 << LCD_DB);

  lcd_enable();

  LCD_PORT |= (0x07 << LCD_DB);

  lcd_enable();

  _delay_ms(1); 

  lcd_clear();

  lcd_home();

}

/*

 * Pinbelegung

 * 

 */

//  LCD DB4-DB7 <-->  PORTD Bit PD0-PD3

#define LCD_PORT      PORTC

#define LCD_DDR       DDRC

#define LCD_DB        PC0

//  LCD RS      <-->  PORTD Bit PD4     (RS: 0=Data, 1=Command)

#define LCD_RS        PC4

//  LCD EN      <-->  PORTD Bit PD5     (EN: 1-Impuls für Daten)

#define LCD_EN        PC5