stm32 usb cdc Device Descriptor Request Failed

[txmsszd]

Posted on June 16, 2016 at 19:19

hi,I am tring to use usb virtual port to transmit data to pc.

MCU：STM32F373 100pins

cubemx: usb device fs checked

usb:communication device class

PC: windows 10

heap size: 0x200

stack size :0x400

when i plug usb cable to pc,it can not be recognised.In device manager,it shows Device Descriptor Request Failed. ST VCP driver installed. BTW, when I debug it, it could goes into USB_LP_IRQHandler after MX_USB_DEVICE_Init() excuted.

thanks.

[aurelien2]

Posted on November 14, 2017 at 10:10

Hello, when I active usb DMA, my board isn't recognized by host. So I suspect DMA in the configuration. Without DMA, virtual serial com port run very well.

[Aleksandr S.]

Posted on March 14, 2018 at 08:54

Hi, All!

I have: HAL version 1.0.0 and SPL)

I just adjusted descriptor:

0x02, /*bDeviceClass*/

0x02, /*bDeviceSubClass*/

It's work on Win10!

[roman239955]

Posted on April 13, 2018 at 22:27

I had this issue and found it was the micro-USB Cable.  After switching cables the USB worked fine.  

Make sure you cut the malfunctioning cable into small pieces to prevent future issues with it.

I have an F407G-Disc1, F411-disco, and F429i-disc1 that all worked after switching cables.