#include	<util/delay.h>
#define LCD_CONCAT(a, b)	a ## b

#define LCD_OUTPORT(name)	LCD_CONCAT(PORT, name)
#define LCD_DDRPORT(name)	LCD_CONCAT(DDR, name)

#define LCD_SCLDDR	LCD_DDRPORT( lcd_scl_port )
#define LCD_MOSIDDR	LCD_DDRPORT( lcd_mosi_port )
#define LCD_ENADDR	LCD_DDRPORT( lcd_ena_port )

#define LCD_SCLPORT		LCD_OUTPORT( lcd_scl_port )
#define LCD_MOSIPORT	LCD_OUTPORT( lcd_mosi_port )
#define LCD_ENAPORT		LCD_OUTPORT( lcd_ena_port )

void	lcd_wrdat(uint8_t b){
	uint8_t c;
	for(c=0;c<8;c++){
		if(b&128) LCD_MOSIPORT |= 1<<lcd_mosi_bit;
		else LCD_MOSIPORT &= ~(1<<lcd_mosi_bit);
		b<<=1;
		asm volatile ("nop");
		LCD_SCLPORT |= 1<<lcd_scl_bit;
		asm volatile ("nop");
		LCD_SCLPORT &= ~(1<<lcd_scl_bit);
	}
	asm volatile ("nop");
	LCD_MOSIPORT |= (1<<lcd_mosi_bit);
	asm volatile ("nop");
	LCD_ENAPORT |= 1<<lcd_ena_bit;
	_delay_us(50);
	LCD_ENAPORT &= ~(1<<lcd_ena_bit);
}

void	lcd_wrcom(uint8_t b){
	uint8_t c;
	for(c=0;c<8;c++){
		if(b&128) LCD_MOSIPORT |= 1<<lcd_mosi_bit;
		else LCD_MOSIPORT &= ~(1<<lcd_mosi_bit);
		b<<=1;
		asm volatile ("nop");
		LCD_SCLPORT |= 1<<lcd_scl_bit;
		asm volatile ("nop");
		LCD_SCLPORT &= ~(1<<lcd_scl_bit);
	}
	asm volatile ("nop");
	LCD_MOSIPORT &= ~(1<<lcd_mosi_bit);
	asm volatile ("nop");
	LCD_ENAPORT |= 1<<lcd_ena_bit;
	_delay_us(50);
	LCD_ENAPORT &= ~(1<<lcd_ena_bit);
}

/* große Zeitschleife 2ms */
void	lcd_delay(){
	_delay_ms(5);
}

void lcd_init(){
	LCD_ENADDR |= 1<<lcd_ena_bit;
	LCD_SCLDDR |= 1<<lcd_scl_bit;
	LCD_MOSIDDR |= 1<<lcd_mosi_bit;
	lcd_wrcom(0b00111000);	//8Bit,2Zeilen,5x7 pixel
	lcd_delay();
	lcd_wrcom(0b00111000);	//8Bit,2Zeilen,5x7 pixel
	lcd_delay();
	lcd_wrcom(0b00111000);	//8Bit,2Zeilen,5x7 pixel
	lcd_delay();
	lcd_wrcom(0b00111000);	//8Bit,2Zeilen,5x7 pixel
	lcd_delay();
	lcd_wrcom(0b00000100);	//Dislplay aus
	lcd_delay();
	lcd_wrcom(0b00000001);	//Display clear
	lcd_delay();
	lcd_wrcom(0b00000110);	//Cursor rechts bei Eintrag
	lcd_delay();
	lcd_wrcom(0b00001110); 	//Display und Cursor ein
	lcd_delay();
}