GUI_Delay() and GUI_Exec() make image on screen blur for miliseconds - noticable

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  • GUI_Delay() and GUI_Exec() make image on screen blur for miliseconds - noticable

    hi all
    im using STM324x9i-eval board.
    creating screens using GUIBuilder - for now only text to eliminate size or cpu time issue.


    while running the GUI_Delay() or GUI_Exec() function, in order to display changes to the screen - the current image get blurred for about a half second and the same image shows again for a half second, right after that its changed to the new image.

    __***__ edit : creating images using Draw_Bitmap makes that too. i can call it flichering. i've tried using MEMDEV functions - no success
    how can i overcome this blurred transition?
    Thank you.
    Files

    The post was edited 4 times, last by asafbit ().

  • Hi,

    unfortunately we have no idea what could be the cause of the flickering. Strange. Never seen before. Could you please tell us which driver/display is used? Further it is required to know exactly what your application does.

    Regards, Jörg
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  • hi
    i did lowered the frequency. and there are no out of sync issue BUT, screen shows very unclear screen and screen is jitter.

    trying to increase frequency bring me again to the same out of sync issue.

    problem occurs even when drawing pixel by pixel.