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Date of registration: Aug 12th 2015

Posts: 1

Location: TURKEY


Wednesday, August 12th 2015, 11:12pm

STEMWIN windows object breakdown


On STM32F429-DISCO board, i am replaced LCD to 5" one. QWVGA 800-480 size lcd works fine. (LTDC, 8MB SDRAM, DMA2D)

I am testing emWIN objects on LCD with guibuilder.exe

Checkbox, radio and slider object are breaking down when i touched them.

Also, creating windows is complating with some runtime problems. Window objects (button, text, image ..) can be shown first, but window's background color is filling slowly.

- After calling creating window, window's objects shown before than window's back color. From up to down, it is slow. I tried to incrase GUI RAM size by using SDRAM and creating window slowed. BG color filling is over 3 seconds for 24bit 800*480 lcd.

I controlled thar DMA2D init and it's interrupts on debug, i could not find any issue.

The working code and windows created by emWin's gui tool. There is no another change. (expect LCD pins and configs, LCD clock timings for LTDC )

Date of registration: May 26th 2009

Posts: 1,022


Thursday, August 13th 2015, 12:12pm


Could you please tell me what is meant with "breaking down"?

Please note that "some runtime problems" does not include enough details to give a hint for solving problems.

Have you been able to determine the performance bottle neck?

Best regards,