No st link connected

[Ax111_]

I have st-link v2 with Firmware version V2J39S7.

I have been trying to debug through STM32 cube ide but it says " NO ST-LINK DETECTED".

I have also tried via Cube programmer and updated the stlink but still of no use. Have done the boot thing too.Could anyone say whats possibly going wrong.

[Andrew Neil]

Try to think where you last saw it ...

[Andrew Neil]

Is it connected to the Host computer?

Does the Status LED light correctly on the ST-Link?

What computer is it - Windows? Mac? Linux? a VM? other ... ?

Does the PC detect it; eg, on Windows:

[Ax111_]

hello, i am using windows and it is being detected under Universal serial like you mentioned in your picture

[Andrew Neil]

It seems to be looking for an ST-Link with the Serial Number 'U':

That's not a valid serial number - check your debug configuration!

[Andrew Neil]

See below - check your ST-Link Serial Number in the debug configuration ...

[Ax111_]

i have tried with the SN number of ST link and everytime it shows me this:

[Andrew Neil]

It's telling you that the ST-Link is stuck in Upgrade mode:

 

ie, it started doing an upgrade, but it failed.

What happens if you hit 'Open in update mode' again?

This is probably best done in the Cube Programmer - rather than trying to do it from the IDE while it's trying to start a debug session ...

BTW, the IDE Serial Number ("SN", or "S/N") setting is here:

just uncheck the box if you don't need to specify a particular ST-Link.

[Ax111_]

i have tried with Cube programmer as well and in the Cube ide, if I "open in update mode"

I have tried every possible combinations from past week but could not get down to a solution.

[Amel NASRI]

Hi @Ax111_​ ,

Several hints are provided in the article How to solve debugger connection issues?

Keep us informed. If problem is resolved, please precise which hint helped you.

-Amel