folny
folny
Today I tested the second STM32H7 this time I have data on pin SWO but STMViewer does not show any data.  
I use ST-Link with a NUCLEO-F446RE development board https://sk.farnell.com/en-SK/stmicroelectronics/nucleo-f446re/dev-board-arduino-mbed-nucleo/dp/2491978
Yes, I tried different values but nothing is displayed. With cpu STM32f446 it works beautifully, only with H7 I have a problem.
Today I tested the same code on the STM32F446 NUCLEO and the data on the SWO pin is fine and looks like this. 
The next test is on the H7 and there is a much higher frequency on the SWO pin, even if I change the prescaler in STMViewer to a higher value,...
So today I searched on the internet what could be the problem with the SWO and I found this configuration that helped me and the STM32H7 SWO is now working...
Yes, STMViewer works fine with this setup.
I haven't tried to change anything yet, I will try to make some changes and add more information.