Can RAM be used for both the display frame buffer and holding dynamic bitmaps?

[Andrei Chichak]

In my upcoming system I will be needing to use dynamic bitmaps.

Can dynamic bitmaps be located on the same RAM device (say SDRAM on STM32F469 discovery board) that is being used as the frame buffer?

I can carve out a piece of the SDRAM for the dynamic bitmaps, but is the DMA2D going to complain?

Thanks,

Andrei

[LouisB]

Hello @Andrei Chichak,

If you have enough RAM it shouldn't cause an issue, but you might have some congestion because of a lot of read and write operations on the same bus. Using different memory banks for framebuffers and dynamics bitmap can help to reduce this issue.

BR,