Segger RTT doesn't work when the touchgfx is initiated.

[lhz412]

Hello,

I am using the touchgfx designer generated project as template to develop my project.  The DK I am using is the STM32U5G9J-DK1. 

I tried to bring up the Segger RTT viewer feature.  The RTT works well before the ToughGFX initialization.  If I comment out the ToughGFX initiation functions and its tasks [ MX_TouchGFX_Init() & MX_TouchGFX_PreOSInit() ], the RTT print can work in the FreeRTOS tasks.  But once I leave the TouchGFX initialization as it is, the RTT stops working after it. 

It seems the RTT and touchgfx have some conflict, but I cannot figure out the root cause. 

Thank you very much,

Thanks, 

[Andrew Neil]

Have you asked Segger? RTT is their proprietary thing...

https://wiki.segger.com/RTT#Troubleshooting 

https://forum.segger.com/index.php/Board/6-General/

[JTP1]

Hello

Im not familiar with RTT but could it be conflict in CRC module. 

Here is some workaround suggestion in another context though:

https://community.st.com/t5/stm32-mcus-touchgfx-and-gui/what-are-the-crc-dependencies-that-touchgfx-expect/m-p/645625

Br JTP

[lhz412]

Thank you, Andrew,  I will try to reach Segger, too. 

[lhz412]

Thank you for the information.  I just tried your clue and verified that the CRC is not the root cause. But good to know the CRC in the touchgfx could cause some issue.  Thank you.     

[Pavel A.]

> It seems the RTT and touchgfx have some conflict

Over the RAM buffer allocated to the RTT?

[hellohello]

Hello @lhz412 and @JTP1 ,

CRC is used by TouchGFX but only at startup so it should not be the root cause of the problem.

Regards,