...now it is working ;-)
It was problem of the configuration of the SPI module on the controller.
But one thing is still a little bit annoying for proffesional use:
Starting the contoller, before the Text is shown on the display, it shortly flashes up with the message :" SPI:SS enable_".
It seems the display is faster than the controller (what I'm not able to change).
Is ot possible to disable this message of the display adapter completely with a command or a maybe a new Firmware?
Many thanks !
Meson