Re: Has anyone used the USB HS port used as a USB FS on STM32F4?

Li, Jun R

Hi Yannis,

I verified your branch with samples/subsys/usb/cdc_acm on my customized STM32F429 board, and found enumeration issues:


[6176209.029339] usb 1- new full-speed USB device number 30 using ehci-pci

[6176209.437330] usb 1- device not accepting address 30, error -32

[6176209.525325] usb 1- new full-speed USB device number 31 using ehci-pci

[6176209.933339] usb 1- device not accepting address 31, error -32

[6176209.933545] usb 1-1.5.2-port1: unable to enumerate USB device


I double checked your code again and found you removed the following two lines on the line 247 which I had recommended:




Without these two lines, the USB_OTG_HS port doesn't work, can't be enumerated.


After adding those two lines, the usb was correctly enumerated and the cdc_acm works well:


[6176395.476959] usb 1- new full-speed USB device number 32 using ehci-pci

[6176395.587715] usb 1- New USB device found, idVendor=2fe3, idProduct=0100

[6176395.587729] usb 1- New USB device strings: Mfr=1, Product=2, SerialNumber=3

[6176395.587732] usb 1- Product: Zephyr CDC ACM sample

[6176395.587734] usb 1- Manufacturer: ZEPHYR

[6176395.587736] usb 1- SerialNumber: 0.01

[6176395.588150] cdc_acm 1- ttyACM2: USB ACM device


So, can you add those two lines back to your branch?


Best Regards,



On 7/10/18, 01:30, "devel@... on behalf of Yannis Damigos" <devel@... on behalf of giannis.damigos@...> wrote:


    Hi Jun and Aurelien,


    I created the following branch in my repository to add support for OTG



    It was tested on stm32f429 SoC by Jun and on STM32F723E-DISCO by Aurelien.


    I updated my repository following your comments. Could you test it

    again because I don't have the hw?


    Before opening a PR upstream I would like to add support for the

    boards you tested it. Could you open a pull request to my branch?


    Please note that only one interface should be enabled at a time, OTG

    FS or OTG HS. The driver will raise an error if both are enabled.


    The USB API should change if we want to have them both enabled.







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