live expressions noticed glitch on displayin values

[kyf]

Hey there. It is quite some time now that I've noticed strange behavior with live expressions.

 

I'm debugging my project in debug optimization "max" and -Og optimization. Debugger that I'm using is "STLINK-V3 compact in-circuit debugger and programmer for STM32".

I've taken a video where you can see the value of variables glitching. I've attached the video in the post*.

I've also noticed via oscilloscope that when debugger is connected there is noise coupling from debug lines to a comparator input of the MCU ( this seems to be separate issue but i believe that maybe they are connected ).

I did try all the different debug frequencies without any change in the above issues.

Can you suggest me to test anything else in order to find out a solution ?

Is there any documentation that I can take advantage of in order to study live expresions / SVW/ JTAG or debug best practices appliance ?!

 

Kind regards,

kyf

 

[kyf]

I forgot to add that the MCU that I'm using is the STM32WLE5CCU.