CDC Device descriptior request failed

[Treacy Yao]

I want to realize CDC function to transimit/receive data to/from PC via STM32F105RB. I get the code from Cube. Set clock, enable CDC and modify heap size to 0x1000. But when I power on deivce, "Device descriptior request failed" shown.

1.I don't know where is the problem.

2.By the way, For the PC driver, "Starting from windows 10, the STSW-STM32102 driver is no more adequate and the usage of the native inbox driver is recommanded", I don't konw where can get native inbox drive? This is mean I don't need to install driver in WIN10. Now I'm using win10 to do the testing.

3.I also tired WIN7(32bit), still have the "Device descriptior request failed" problem.

Please help me.

[Tesla DeLorean]

Is this on known working hardware?

In BOOT0=HIGH, can you see up a STM32 USB DFU device?

I'm not looking to wade through 18MB of someone else's Cube project. You'll need to debug your own work. Instrument functionality to you can see/understand what is happening.

[asbjorn.heid]

Did you implement CDC_Control_FS handling? See my post in https://community.st.com/s/question/0D50X0000A4nieqSQA/how-to-implement-usb-cdc

[Treacy Yao]

Thank you for your response. I have tried as you said and still have the "Device descriptior request failed" in WIN10. I attach my files. Please have a check.

I doubt maybe it is hardware problem, but How can I confirm with oscilloscope? I'm the green hand for USB.

[asbjorn.heid]

And regarding 2) yes, Windows 10 has built-in driver, so no need to install.

[Trevor Jones]

I fixed this issue yesterday...

the crystal was set to bypass clock, so it used the internal 48MHz and half worked...

Do you have a crystal ? check the frequency on the scope.. it has to be correct in the cube...

[Treacy Yao]

I selected Crystal/Ceramic ReSonatar for HSI and LSE. Do you mean let me try to select BYPASS clock for  HSI and LSE?

[Trevor Jones]

I had to set it to Crystal, and then I checked the crystal was running on the scope at 8MHz

Then set that in the cube, it works now...

[T J]

please check your crystal is running with a scope, do you have one ?

please check that inside the cube the crystal is connected to the PLL and running the system clock and the USB port.

I am sure this is the problem, since it half works, just like mine did.

[Treacy Yao]

Sorry that I don't understand your meaning clearly. I check the HSE and USB D+ frequency. Please have a check.

[Trevor Jones]

very difficult to see the voltage of the crystal, and the frequency is not exactly 16MHz ? it should be 16.00 I would expect.
now check in the cube, is the HSE selected as the clock source ?
check it all the way to the usb clock 48MHz inside the cube clock configuration page.