#include <avr/io.h>

/*	PC1 = RS
	PC2 = R/W

	PB0 = Chip 1 Select
	PB1 = Chip 2 Select
	PB2 = Reset
	PB3 = Backlight
	PB5 = Enable Trigger

*/

void displayState();
void setAddress(char zeile);
void setPage(char seite);
void setStart(char start);
void write();
void init();



void main()
{
	
	DDRB = 0xff;
	DDRC = 0xff;
	DDRD = 0xff;
	
	init();

	while(1)
	{	
		 /*PORTB = 0xff;
		 PORTC = 0xff;
		 PORTD = 0xff;*/
		
		
		 //Display einschalten
		char state = 0;
		displayState();

		//Y-Adresse 1 - 64
		char zeile = 63;
		setAddress(zeile);

		//X-Adresse 1 - 8
		char seite = 7;
		setPage(seite);

		//Display Start Line 1 - 64
		char start = 63;
		setStart(start);
	
		//Daten schreiben ASCII
		write();
	}
}

void displayState()
{
	PORTC = 0x00;
	PORTD = 0x3f;
}

void setAddress(char zeile)
{
	PORTC = 0b00000000;
	PORTD = (0b01000000) ^ zeile;
}

void setPage(char seite)
{
	PORTC = 0b00000000;
	PORTD = (0b10111000) ^ seite;
}

void setStart(char start)
{
	PORTC = 0b00000000;
	PORTD = (0b11000000) ^ start;
}

void write()
{
	PORTC = 0b00000010;
	PORTD = 0b11111111;
}

void init()
{
	PORTB = 0b00101111;
}