STM32L4 CDC not working under Windows 10.

[PWind.1]

Have implemented Virtual Comm port on STM32L4. Works fine under Linux but Windows 10 shows Device Descriptor Request Failed.

Suggestions please.

Thanks

[PWind.1]

After upping the system frequency to 32MHz now works fine under Linux and Windows.

Can anyone explain?

[Jeff Tenney · Accepted solution]

Have you seen this?

https://github.com/STMicroelectronics/STM32CubeL4/issues/4

[PWind.1]

You star!

Thanks for thank - would explain why a frequency increase worked. Still not sure why Linux liked it and not Windows, but then that's Windows for you!

Phil