Arduino Zero DMA

[ghost]

Hello,

i try to modify this library for Arduino Zero. NORMAL mode works good (but still some improvements possible) and faster then the Adafruit library.
But DMA dont want to work. I also modified SdFat library and get nearly same Speed like with Arduino Due. But with same code in ILI9341_due library (i also tested Adafruit_ZeroDMA) no write or read are possible.
It seems the display reject data if i try to use DMA transmission.

Can anyone help here?