LCD mit KS0066U

#include <avr/io.h>

#define F_CPU 8000000UL

#include <util/delay.h>     /* bei alter avr-libc: #include <avr/delay.h> */ 

#include "lcd.h"

#define LCD_RS 7

#define LCD_EN 6

#define LCD_CTRL PORTD

#define LCD_CTRL_DDR DDRD

#define LCD_DB4 4

#define LCD_DB5 5

#define LCD_DB6 6

#define LCD_DB7 7

#define LCD_DATA PORTC

#define LCD_DATA_DDR DDRC

#define LCD2LINEMODE 1

#define LCDON 1

#define LCDBLINK 1

#define LCDCURSOR 1

#define LCDSHIFT 1

#define LCDINCREMENT  1

void LcdInit(void)

{

    LCD_DATA_DDR = 255;

    LCD_CTRL_DDR |= (1 << LCD_RS) | (1 << LCD_EN);

  //Wait for Display selftest. You can remove this, if this function is called more than 30ms after start

  _delay_ms(40);

  //1. Function set

  //RS = ||--| = DATA

  //Send 00100 x2

  LcdSend4(0b00000100);

  LcdSend4(0b00000100);

  //Send 000 + DISPLAY ON/OFF + 1/2 LINE MODE

  LcdSend4((LCDON << 3) | (LCD2LINEMODE << 4));

  //Wait for more than 39µs

  _delay_us(40);  

  //2. Display ON/OFF Control

  //Send 0

  LcdSend4(0);

  //Send 0 + LCDBLINK + LCDCURSOR + LCDON + 1

  LcdSend4((LCDBLINK << 1) | (LCDCURSOR << 2) | (LCDON << 3) || (1 << 4));

  //Wait for more than 39µs

  _delay_us(40);  

  //3. Display Clear

  LcdClear();

  //Wait for more than 1.53ms

  _delay_ms(2);  

  //4. Entry Mode Set

  //Send 0

  LcdSend4(0);

  //Send 0 + LCDSHIFT + LCDINCREMENT

  LcdSend4((LCDSHIFT << 1) | (LCDINCREMENT << 2) | (1 << 3));

  //Wait for more than 39µs

  _delay_us(40);  

  //Initialization end

}

void LcdClear(void)

{

  LcdSend4(0);

  LcdSend4(0b0000010);

}

void LcdSend4(uint8_t data)

{

    LCD_CTRL &= ~(1 << LCD_RS);

    LCD_CTRL |= (data & 0x01) << LCD_RS;        

  LCD_DATA = (((data & 0x02) << LCD_DB4) | ((data & 0x04) << LCD_DB5) | ((data & 0x08) << LCD_DB6) | ((data & 0x10) << LCD_DB7));

  LCD_CTRL |= (1 << LCD_EN);

  LCD_CTRL &= ~(1 << LCD_EN);

}