DMA priorities for LTDC

[Grzegorz Kania]

Posted on June 22, 2018 at 08:57

Hi,

I have a problem with configuring priorities for DMA channels and LTDC controller.

I am using a DMA channel to communicate with a DSP processor. In this channel I need a large data transfer. When I start the DMA channel, I get a FIFO Underrun error from the LTDC controller, and the screen blinks very much.

How to set up the priorities of DMA channels?

I think that priority for LTDC shoud be the highest, but how can i do it ?

Regards

Grzegorz

[Grzegorz Kania]

Posted on June 22, 2018 at 09:32

hi again

I have already found the answer

Sometimes it is enough to ask someone.

All answers are in AN4861 Application note.