STemWin and DMA2D on STM32F746Disco

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  • STemWin and DMA2D on STM32F746Disco

    Hi,

    Using successfully STemWin on STM32F746Disco.
    Trying though to have a custom effect on the LCD on a lower/bottom area that is not used by any emWin draw function.
    Got the right memory areas of the screenbuffers ok.
    The effect is getting written via the DMA2D and viewed ok on the LCD.

    Yet some times the LCD screen looks like its starting offset is lost and creates a 'broken' view for a split second and then its ok, that happens randomly.

    My question is this, can the DMA2D controller be used from an application at user's discretion to directly write on a LCD memory area (that STemWin does not use to draw anything in it), or the DMA2D is used exclusively by emWin core on STM32?

    Christos