display character very slowly or display all after long time later

Question

I using STM32H743BIT6 and 7 inch display.

if i enable dual buffer, #define EW_USE_DOUBLE_BUFFER 1

then after very long time screen displayed

if i disable dual buffer, #define EW_USE_DOUBLE_BUFFER 0

display character and picture very slowly

SDRAM or something is problem, but not sure, I don't know.

I want to know dual buffer enable/diable.

Answer 1

It was solved

A problem occured when combining two firmwares, and it was solved be deleting ew_bsp.os.c and ew_bsp_os.h on the embeddedwizard side

also change functions in ew_bsp_display.c like this

EwBspOsSemaphoreRelease( LcdUpdateSemaphore ); ==> osSemaphoreRelease( LcdUpdateSemaphore );