Device manager not recognizing USB cdc ecm device

Question

Device manager not recognizing USB cdc ecm device

SMt.1 0

Hello, I currently have an stm32 project that uses usb cdc ecm to transfer data. Currently, when I plug the cable (from STM32 USB device) into the computer, it does not recognize the CDC-ECM device in other devices, rather labelling it as an STM32 Virutal ComPort in FS.

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I have tried changing the VID and PID (I was using the ECM ones from the android ether library) back to default STM32H7 ones. Additionally, I have tried changing device class and subclass values in usb device descriptor file to 0x02 as recommended on the Microsoft site for usbser.sys on Windows 10 and see additional events for the port. However, none of these have solved the issue, and I still see 'Code 28'. The Update Drive option is also greyed out for me.

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Additionally, the STLink Virtual COM Port is showing that it is using the usbser driver successfully, so I'm not sure why the actual board is not doing the same.

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Is there a driver install that needs to be done or a setting to change for this?

Thank you.

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Answer 1

Limitless Technology 44,751

Hi. Thank you for your question and reaching out. I’d be more than happy to help you with your query

According to this article https://learn.microsoft.com/en-us/troubleshoot/windows-server/backup-and-storage/usb-device-not-recognized-error, you can try to uninstall and then reconnect the external hard drive

This method resolves issues where the currently loaded USB driver has become unstable or corrupt.

Select Start, type Device Manager in the Search box.

Select Device Manager from the returned list.

Select Disk Drives from the list of hardware.

Press and hold (or right-click) the USB external hard drive with the issue, and select Uninstall.

After the hard drive is uninstalled, unplug the USB cable.

Wait for 1 minute and then reconnect the USB cable. The driver should automatically load.

Check for the USB drive in Windows Explorer.

Please see the attached link for more information.

If the reply was helpful, please don’t forget to upvote or accept as answer, thank you.

SMt.1 0 Reputation points

2023-02-24T14:16:47.1533333+00:00

Hello, I have tried that and it does not change what I see in device manager. The driver it makes me uninstall is the STM STLink USB Device one, which pertains to my computer -> board cable that I download code with, not the actual USB data transfer cable I was referring to (two USB cables between computer and board total).

I am still observing the same result as those in the pictures I had attached.
SMt.1 0 Reputation points

2023-02-24T14:25:35.6466667+00:00

This is observed whenever I download my code, start running, and plug the cable from the board device into the computer. In this case, the STLink Virtual COM Port I sent a picture of in my first post, is using the usbser.sys driver meant for USB devices (the computer recognizes and starts the events for it), and I am trying to get the board to do the same so that the computer can recognize my device as 'cdc-ecm' device rather than an 'STM32 Virtual ComPort' shown in 'Other Devices'.

I hope that provides a bit more detail on what I am experiencing, thank you.
Guillermo Garcia Romero 0 Reputation points

2024-01-29T21:36:45.87+00:00

I got the same problem , how can i fix it ?

Answer 2

Limitless Technology 44,751

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Device manager not recognizing USB cdc ecm device

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