Arduino for STM32

Thanks for the ideas guys, I'll keep trying later and see if I can get it sorted. I really need a bunch of ADC pins and a USB serial port for some datalogging.

Still havent got this working. I'll try a completely different PC but it cant be driver related can it as enumeration has to happen before a driver is assigned?

I guess I cant rule out a hardware fault, I'll see if I can find an old board which I know has worked previously so I can test that.

Ok, that definitely does not work for me.

I get 'USB Device not recognised' from windows and 'device descriptor read error' 'unable to enumerate USB device' in linux.

Can you post your sketch just so I can try and replicate it?

Is there a known issue with USB CDC on the latest STM32 official core? I have been away from STM32 stuff for a little while and I'm sure CDC was working fine 6 months ago but I cant get any of my boards to enumerate on Windows or Linux. This is with the 1.5k resistor fixed and just a basic blink and ...