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H
Hoang_Tran
Visitor II
April 12, 2019
Question

Barcode Scaner in USBHID

  • April 12, 2019
  • 6 replies
  • 1454 views

I'm trying to use the stack usb hid to talk with a barcode scanner. When I connect the scanner it is classified as a keyboard, but does not generate the interrupt events. Does anybody know why?

thanks!0690X000008AQtbQAG.png

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    6 replies

    H
    Hoang_TranAuthor
    Visitor II
    April 13, 2019

    up

    H
    Hoang_TranAuthor
    Visitor II
    April 13, 2019

    help me

    T
    Tesla DeLorean
    Graduate II
    April 14, 2019

    You've got all the equipment in front of you, instrument the code to understand the interaction and perhaps augment that with a USB analyzer if you have one. Perhaps use a software based monitor on a PC, and compare.

    P
    Pavel A.
    Super User
    April 13, 2019

    Does it work with other, real keyboards?

    Which STM32 is it? For some families, update to the latest CubeMX library version can help.

    -- pa

    H
    Hoang_TranAuthor
    Visitor II
    April 14, 2019

    I am using the latest Cubemx version!

    It works normally with a normal keyboard, but when used with Barcode, the Usb only Start, not ready

    P
    Pavel A.
    Super User
    April 14, 2019

    As Clive advised, you need to debug with a USB analyzer or debug prints

    M
    Matthew_ST
    Visitor II
    December 22, 2020

    Hello, I have the same problem in my program, did you solve it?

    ​0693W000006Ga87QAC.jpg

    P
    Pavel A.
    Super User
    December 22, 2020

    The HID host goes to "ready" state after completing few class-defined requests to the device.

    Looks like some request fails or the device does not respond.

    Debug to understand where it's stuck and how to recover, and use a USB sniffer.

    If this sounds not feasible, find a consultant/contractor who can do it for you.

    -- pa

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