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Kevin Flanagan
Kevin Flanagan
Associate III
June 1, 2017
Question

Looking for documentation on the CUSTOM_HID_ReportDesc_FS in usbd_custom_hid_if.c for custom HID.

  • June 1, 2017
  • 1 reply
  • 1758 views
Posted on June 01, 2017 at 18:55

Looking for documentation on how to setup the CUSTOM_HID_ReportDesc_FS in usbd_custom_hid_if.c on a custom HID interface.

I seem to be banging my head against a wall, the forums, google,

https://www.youtube.com/channel/UCcnfF_6NPxbr-W2FOT6JRMQ

's youtube example, the custom hid example in STM32Cube_FW_F4_V1.16.0, ect... in trying to get a custom hid working on a Nucleo-STM32429zi board.

I get enumeration on a Windows 10 machine, but end up with errors that appear to be related to the report descriptor under device manager. Messages like 'An unknown item was found in the report descriptor' (most examples I found) and 'Extra end collection found or end collection not found.' (When left blank 0x00, 0xC)

This brings us back to CUSTOM_HID_ReportDesc_FS. In a nutshell, I need to create structure to exchange 64 byte messages in and out, and seem be failing with this descriptor. 

Any help finding the required documentation to understand and create a working descriptor would be greatly appreciated. 

Thanks,

    This topic has been closed for replies.

    1 reply

    Kevin Flanagan
    Kevin FlanaganAuthor
    Associate III
    June 2, 2017
    Posted on June 02, 2017 at 23:10

    I seems to have gotten this working. Even though this question has not gotten a responce, digging through the forum archives has helped immensely. Not 100% what the hangup was, but some key items learned going down this road with the NUCLEO-STM32429zi...

    1. USBD_CUSTOM_HID_REPORT_DESC_SIZE in usbd_conf.h needs to match the number of bytes (33)used in CUSTOM_HID_ReportDesc_FS. (This was my final hurdle).I used 

      Badreddine Bouzouita's descriptor.

    2. CubeMX v4.2.1.0 does not generate the exact same files as used by Badreddine Bouzouita in his youtube and source example. Doing a compare on usbd_custom_hid_if.c is critical. Especially references to hUsbDevice_0.
    3. For working NUCLEO-STM32429zi CubeMX code, I need to check 'Initialize all peripherals with their default mode'. If I do not do this I end up with several 'unsolvable' clock configuration errors when I enable USB OTG FS.
    4. That said, to keep the board from hanging up on bootup I need to comment out MX_ETH_Init(); inside of main() in main.c. I need to research how to disable the ethernet in CubeMX before generating the code. 

    Again, thanks to everyone over the years that have contributed to the forum archives. I searched them exhaustively and the solution was gleamed from them.

    fyi. Does a method exist to post a zip of the basic project shell to provide others a way to comment and maybe use as a starting point?

      I
      Imen.D
      Technical Moderator
      June 5, 2017
      Posted on June 05, 2017 at 16:23

      Hello

      Flanagan.Kevin

      ,

      Thank you for your feedback and contribution to shareyour knowledge with community member.

      https://community.st.com/community/share-your-activities/blog/2016/12/04/how-to-share-your-activities-with-the-community

      You can share your project in the community by clicking onBrowse >> Share >> Share your project (in the right)

      0690X00000607FHQAY.png

      Regards

      Imen

      In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Thanks
      Kevin Flanagan
      Kevin FlanaganAuthor
      Associate III
      June 5, 2017
      Posted on June 05, 2017 at 17:28

      Imen,

      Thanks for the documentation on how to share. I have shared a .zip of the project with the community. 

      https://community.st.com/0D50X00009bMM5YSAW

       

      Thanks again,

      -Kevin

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