Hi,

eigentlich fehlt da noch was:
Erst wird das WriteCommand angesprochen, danach das WriteData.
Stimmt dann das von vorher noch?
Danke.

Code:
#define SED1335_DATA_PORT		PORTA
#define SED1335_DATA_DIR		DDRA
#define SED1335_DATA_PIN		PINA

#define SED1335_CONTROL_PORT	PORTD
#define SED1335_CONTROL_DIR		DDRD
#define	SED1335_CONTROL_PIN		PIND

#define SED1335_A0				(1 << PD4)
#define SED1335_WR				(1 << PD5)
#define SED1335_RD				(1 << PD6)
#define SED1335_CS				(1 << PD3)
#define SED1335_RES				(1 << PD2)
//-------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------
void GLCD_InitializePorts(void)
{
SED1335_DATA_DIR = 0xFF;
SED1335_CONTROL_PORT |= (SED1335_A0 | SED1335_WR | SED1335_RD | SED1335_CS | SED1335_RES); 
SED1335_CONTROL_DIR |= (SED1335_A0 | SED1335_WR | SED1335_RD | SED1335_CS | SED1335_RES); 
}
//-------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------
void GLCD_WriteData(unsigned char dataToWrite)
{
SED1335_DATA_PORT = dataToWrite;
SED1335_DATA_DIR = 0xFF;
SED1335_CONTROL_PORT &= ~(SED1335_CS | SED1335_A0 | SED1335_WR);
asm("nop");
asm("nop");
SED1335_CONTROL_PORT |= (SED1335_CS | SED1335_A0 | SED1335_WR);
}
//-------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------
void GLCD_WriteCommand(unsigned char commandToWrite)
{
SED1335_DATA_PORT = commandToWrite;
SED1335_DATA_DIR = 0xFF;
SED1335_CONTROL_PORT &= ~(SED1335_CS |SED1335_WR);
asm("nop");
asm("nop");

SED1335_CONTROL_PORT |= (SED1335_CS | SED1335_WR);
}
//-------------------------------------------------------------------------------------------------