USB_DEVICE Not Recognized on STM32L562CEU6P Board

[Danit]

Hi everyone,

I'm developing on an STM32L562CEU6P board using STM32CubeIDE on a Windows 11 laptop.

In my project, I'm trying to use the USB_DEVICE feature, but when I run the project, my computer fails to recognize the USB device.

What I've tested so far:

• I tested the same board on a desktop computer running Windows 10 – the USB device was recognized successfully.
• I tested a different board (NUCLEO-F767ZI) on my laptop – it was recognized without issues.
• I verified that the physical connection is fine, drivers are installed, and there are no hardware issues.

My questions:

• Could there be a difference in USB recognition between desktop and laptop computers?
• Could this issue be related to the operating system (Windows 11 vs. Windows 10)?
• Are there any specific drivers or settings required for the STM32L562CEU6P board?

I’d really appreciate any help, suggestions, or insights :folded_hands:
Thanks!

[Andrew Neil]

Welcome to the forum.

You need to give some more detail - please see: How to write your question to maximize your chances to find a solution for best results.

In particular:

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@Danit wrote:

I'm developing on an STM32L562CEU6P board

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What board, exactly?

If it's a custom board, please provide the schematics.

Also details of your software.

[Danit]

Hi, thanks for your support

I'm using STM32CubeIDE version 1.7.0 with a custom board based on STM32L562CEU6P.

hardware schematic of the board – images are attached for reference - schematic and schematic1.

1. In ioc file, I configured:

   • PA11 as USB_DM and PA12 as USB_DP (image GPIO USB PA11 and PA12).
   • USB mode set to Device FS (image Device FS).
   • USB class set to CDC (image middleware USB device CDC).
   • Clock source set to HSI48 at 48 MHz (image clock configuration).

2. The project includes calls to:

   • MX_USB_DEVICE_Init()
   • CDC_Transmit_FS() for data transmission.

3. Despite this setup, I still get the following error on my Windows 11 laptop:"Unknown USB Device (Device Descriptor Request Failed)"
   (Screenshot attached in the original post)

Thanks again!