unsigned char WriteEEPROM(unsigned char *pData, unsigned char keyno) 
{
unsigned char keys = 0;
unsigned char keysl = 0;	
unsigned char bytes = 0;
unsigned char counter = 0;
unsigned char returnvalue = 0;

if(keyno == 1){                       //Taster/Ausgang 1
	keys = 0;
	keysl = 4;	
}
else if(keyno == 2)                   //Taster/Ausgang 2
{
	keys = 4;
	keysl = 8;
}
else if(keyno == 3)                   //Taster/Ausgang 3
{
	keys = 8;
	keysl = 12;
}
else if(keyno == 4)                   //Taster/Ausgang 4
{
	keys = 12;
	keysl = 16;
}
for(keys; keys < keysl; keys++)
	{
	for(bytes = 0; bytes < 8; bytes++)
		{
		if(eeprom_read((keys * 8) + bytes) == 0xFF)
			counter++;
		}

	if(counter == 8) break;
	else counter = 0;
	}

for(bytes = 0; bytes < 8; bytes++)
	{
	eeprom_write(((keys * 8) + bytes), pData[bytes]);
	}

if(counter == 8) returnvalue = 1;
	else returnvalue = 0;

return returnvalue;
}

unsigned char CheckEEPROM(unsigned char *pData)
{
//Deklaration + Initialisierung für iButton1
unsigned char keys = 0;
unsigned char bytes = 0;
unsigned char counter = 0;
unsigned char returnvalue = 0;

//prüfen, ob es der 1. Kanal ist
for(keys = 0; keys < 4; keys++)
	{
	for(bytes = 0; bytes < 8; bytes++)
		{
		if(eeprom_read((keys << 3) + bytes) == pData[bytes])
			counter++;
		}

	if(counter == 8) break;
	else counter = 0;
	}

if(counter == CORRECT) returnvalue = 1;
	else {
		//ENDE: prüfen, ob es der 1.Kanal ist

		//ansonsten prüfen, ob es der 2. Kanal ist
		for(keys = 4; keys < 8; keys++)
			{
			for(bytes = 0; bytes < 8; bytes++)
				{
				if(eeprom_read((keys << 3) + bytes) == pData[bytes])
					counter++;
				}

			if(counter == 8) break;
			else counter = 0;			}

		if(counter == CORRECT) returnvalue = 2;
		

else {
		//ansonsten prüfen, ob es der 3 Kanal ist
		for(keys = 8; keys < 12; keys++)
			{
			for(bytes = 0; bytes < 8; bytes++)
				{
				if(eeprom_read((keys << 3) + bytes) == pData[bytes])
					counter++;
				}

			if(counter == 8) break;
			else counter = 0;			}

		if(counter == CORRECT) returnvalue = 3;
		
else {
		//ansonsten prüfen, ob es der4. Kanal ist
		for(keys = 12; keys < 16; keys++)
			{
			for(bytes = 0; bytes < 8; bytes++)
				{
				if(eeprom_read((keys << 3) + bytes) == pData[bytes])
					counter++;
				}

			if(counter == 8) break;
			else counter = 0;			}

		if(counter == CORRECT) returnvalue = 4;
		

	}
}
}
return returnvalue;
}