Basic TouchGFX application don't work

[Luca1]

Hi to all!

I'm not able to run a very basic (a black screen) TouchGFX application on my hardware. I have follow the TouchGFX documentation and the STM32L496G-DISCO application example, but i wasn't lucky..

In particular I never reach the breakpoint that i put in the TouchGFXHAL::flushFrameBuffer(const touchgfx::Rect& rect) method. Also, if I suspend the debug, i see that the application stack arrive at the method touchgfx::HAL::lockFrameBuffer().

I have modified only the TouchGFXHAL class, in attatched there are this class files, following the documentation and the example metioned above, but maybe i miss something.

Please someone can give me some help?

[Martin KJELDSEN]

Which Operating system are you using? lockFrameBuffer() ends in a call to a function inside OSWrappers which uses the constructs of your RTOS to syncrhonize the framebuffer.

/Martin

[Luca1]

I use the FreeRtos os. I use the CMSIS v2 wrapper for the os.

[moredatalesscenter]

Hi Martin@Martin KJELDSEN (ST Employee)​

This is timely as I'm experiencing a similar problem. https://community.st.com/s/question/0D53W00000BJYliSAH/flushframebuffer-is-not-called

[Martin KJELDSEN]

Just to update people in this thread - Turns out there was no issue after all. FreeRTOS + NoDMA also works for me here on my L496-DISCO.

/Martin