Error in initializing ST-LINK device. Reason: No device found on target.(Stm32H755)

[remoter]

 

 

 

 

Recently, I got some projects from my professor and tried to solve that with my Nucleo-H755 Board.

 

I found that the way How to debug this MCU, Stm32H755 is pretty different with other st mcu, so i followed this video to set the debugging environment.

https://www.youtube.com/watch?v=jI1k6p-fduE

 

After applying some settings, I checked that my board got a problem.

I couldn't connect to my board anymore(Cubeide- Debugging Mode or Cube programmer connecting) but still can check the voltage of st-link and volume of memory Storage.

 

I would really appreciate it if you could give me a suggestion to solve this problem.

Thank you.

 

 

 

 

 

 

 

 

 

 

 

[TDK]

> After applying some settings

What settings were those? Did you change SMPS/LDO settings? Recovery instructions are here:

https://community.st.com/t5/stm32-mcus/how-to-unbrick-an-stm32h7-after-setting-the-wrong-power-mode/ta-p/49691

If it was something else, you can generally recover by holding BOOT0 high during reset.

[remoter]

I just solve the problem after applying your advice. Thank you for your help!