ST-Link on 32L0538DISCOVERY doesn't connect to PC

[Toximik]

Hi,

i have bought 3 pcs of STM32L053 Discovery kits and the user USB is working fine with preload demo, but the ST-LINK USB connects to PC as USB Composite Device even if i have download and install the last ST-Link drivers from st.com. I have tried different ports, different cables, also tried reboot computer, reinstall drivers and unfortunatelly nothing helps. Tried all 3 boards and all behave the same.

Other Nucleos (F401, L452, ...) and Discovery boards (L152) are working properly and without any problems.

I kinda desprate.

Thanks for help.

Tomas

[KnarfB]

I have no specific advice, but composite device is nothing bad. When using USB Device Tree Viewer with a working board/driver one gets a composite device with 3 child devices:

• ST-Link Debug (STMicroelectronics STLink dongle)
• USB-Mass Storage Device
• STMicroelectronics STLink Virtual COM Port

Do the USB VID/PID differ?

hth

KnarfB

[Toximik]

I get only USB composite device with yellow triangle and no other device appears. ST-Link utility does not see the ST-Link etc.

[Uwe Bonnes]

Check different cables, check on different ports, check on different PCs.

[Toximik]

@Uwe Bonnes​  I have already tried different cables, ports and computers. Nothing helped. :\

[Imen.D]

Hello @Toximik​ and welcome to the Community :)

Check that the setup of the jumper is correct.

Try to follow this FAQ: USB device not recognized

When your question is answered, please close this topic by choosing Select as Best.

Imen

[Toximik]

Hi @Imen DAHMEN​,

Setup of jumpers is correct and I don't thing, that any jumper on STM32L053 board have any impact on link between ST-Link and computer.

FAQ is not related to my problem, because I don't have problem with my program, but with the program inside ST-Link chip (STM32F103xx), which doesn't connect to the PC.