STM32H735G-DK STLINK no STLINK USB enumeration.
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‎2021-12-29 5:48 AM
Hi,
I just bought STM32H735G-DK and USB is not working out of the box.
I have put jumper on STLK but device is not getting detected on PC(LD6 red/green dim lit).
There are no new devices in device manager when plugged in.
Board is running original program just fine, power on and all.
Am I missing something? Is there something I can do?
Best regards
Solved! Go to Solution.
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STM32H7 Series
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USB
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‎2021-12-29 7:59 AM
Next time test the cable with some known working board.
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‎2021-12-29 6:04 AM
Check that you use the right usb connector. Check cable, check usb port. Check that you did not keep the stlink under reset by some jumper.
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‎2021-12-29 6:08 AM
Tried two PC-s.
Connector is cn15. Tried 3 cables no luck.
Jp3 is open.
only JP1 and STLK jumper are closed.
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‎2021-12-29 6:14 AM
> LD6 red/green dim lit
What does this mean? They're both lit (so yellow?) but only dimly?
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‎2021-12-29 6:17 AM
They are lit but like being lit with pull-up/pull-down resistor so you can barely see that it is lit
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‎2021-12-29 6:34 AM
Start measuring the voltages at the different jumpers in the supply path. Expect e.g. a broken or cold solder USB connector pin.
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‎2021-12-29 6:49 AM
Thank you guys it looks like the cable was bad or only for powering devices.
4th cable worked. incredible
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‎2021-12-29 6:58 AM
If you have 3 bad USB cables it may be time to reevaluate purchasing decisions.
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‎2021-12-29 7:06 AM
Usually I make my own PCBs and use JLink for debuging/programing.
I bought this one to learn a little bit about ST, because I use NXP, Freescale, Atmel but want to switch to ST because they have enough memory embedded.
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‎2021-12-29 7:47 AM
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