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STemWin GUI_CopyRect

Question asked by svabik.jiri.003 on Jun 10, 2015
I have applied STemWin library on STM32F429 with LTDC peripheral  and external SDRAM with controller FMC on TFT display 800x480 pixels (24bit RGB mode). It seems that everything works. Functions as GUI_FillRect, GUI_DrawCircle, GUI_DrawLine, GUI_DispString, GUI_DispStringAt, GUI_SIF_CreateFont, ..etc.. work corectly. Only function GUI_CopyRect work nothing, nothing at all. Function GUI_CopyRect(0, 0, 10, 0, 5, 5) has copy rectangle 5x5pix from point 0,0 to 10,0, but the memory (and on display) will not change. What might be the problem ??? Thenks SVAB