STM32F103 USB problem with custom Hardware with cubeMX software (basic example), It doesn't work.

I'm using stm32f103 in my hardware, I didn't put pull-up resistor to USB _ D+ pin.

The device doesnot appear on PC.
Is there any way to make it work without Hardware changes?

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Best answer by AScha.3

>Is there any way to make it work?

yes.

add 1k5 pull-up resistor to USB _ D+ pin. - without 1k5 , no enumeration.

you edit :

>Is there any way to make it work without Hardware changes?

no.

AScha.3Best answer

Super User

>Is there any way to make it work?

yes.

add 1k5 pull-up resistor to USB _ D+ pin. - without 1k5 , no enumeration.

you edit :

>Is there any way to make it work without Hardware changes?

no.

"If you feel a post has answered your question, please click ""Accept as Solution""."

Principal

Also, generally, if you call Transmit from the main loop, the USB will sooner or later hang.

My STM32 stuff on github - compact USB device stack and more: https://github.com/gbm-ii/gbmUSBdevice

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