Hi everybody !
I think I have found the problem: I think the 3.2" TFT has got a 16 bits data interface. I tried out this article:
SainSmart | Desktop CNC, 3D Printing & DIY Tools | Power to the Makers – SainSmart.com and with the correct wiring it's working.
My TFT Shield is just working with 8 data bits.
I have tried out the example code, contemplator.ino sketch and is working. But there some patterns in it which is working but there is flickering, vertical flickering white lines.
I speak from experience this flickering is in connection with the drawing speed. When the drawing is slower there is less flickering.
I think my 3.2" TFT coudn't work in 8 bit data modes if I'm not mistaken. But why there is flickering?
Thank you very much yours answers!