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STM32F769I-DISCO LCD RTOS LwIP : screen corrupted [solved]

Question asked by Joerg Wagner on Sep 9, 2017
Latest reply on Sep 19, 2017 by Joerg Wagner


Based on the HAL example >Applications>Display>LCD_PicturesFromSDCard I converted

this into a CubeMX (V1.7.0) project, which works fine. Adding FreeRTOS works as well.

But if I add LwIP (just adding) sometimes the image is not shown properly.

Parts of the image is corrupted on the screen.

Regardless if DHCP/static and memory settings for LwIP and FreeRTOS.

It does occur i.e. after every 6-20th image loading. There is no rule.

Why is it a problem to use LwIP in this case?

Thank you for every hint.