SOLVED - USB device not recognized for STM32F078RB with HSI48 (without external quartz)

[LFRED.1]

Hello,

I try to use the USB Device of STM32F078RB as a HID FS.

I don't have external quartz, I use HSI48.

I've configured CubeIDE properly (I guess) : clock & USB_Device.

But the USB doesn't want to work, it's not recognized by the PC.

I already work with the STM32F103 and it was perfect, but not with F078.

Any idea?

Thanks for our help.

Regards,

laurent

[waclawek.jan]

Debugging on the STM32 side, how far does it get in the enumeration process?

JW

[LFRED.1 · Accepted solution]

Hi @Community member​ ,

thanks for your reply.

Not very easy to debug the enum process, but found the bug...

VDDIO2 at 1V8 instead of 3V3 -_-

It works better now^^

BR

Laurent

[waclawek.jan]

Hi Laurent,

Thanks for coming back with the solution.

Please select your post as Best so that the thread is marked as solved.

JW