New ST-Link V2 not working.

Forum|Forum|4 years ago
February 7, 2022
4 replies
3401 views

Hi,

In the past I have successfully been using an inexpensive USB ST Link V2 clone without any problems at all.

In my current project I need to use the SDW for dumping debugging information to the console.

I purchased the official ST Link V2 from mouser but I cannot get simple SWD to work at all.

The PC can detect it and I can update its firmware but it will not detect target projects/boards no matter what I do.

I have tried many different configurations in ST-LINK Utility and STM32CubeIDE without success.

Is there anything I can try? Am I missing something?

ST-Link

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Simon.T

ST Employee

Hello @SWhit.7,

What STM32 are you using?

Did you already program your MCU ? If yes, is it with low power mode?

Did you try with STM32cube programmer ?

Andreas Bolsch

Lead III

One common pitfall: For the STLink-V2-clones VDD is an output, and this pin can actually supply a target with some external circuits. Whereas for the original STLink-V2 VDD is an input used to set the proper thresholds for the level shifters. So the target must be supplied externally and STLink's VDD input connected to target's VDD.