Barcode Scaner in USBHID

[Hoang_Tran]

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!

[Hoang_Tran]

up

[Hoang_Tran]

help me

[Pavel A.]

Does it work with other, real keyboards?

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

-- pa

[Hoang_Tran]

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

[Tesla DeLorean]

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.

[Pavel A.]

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

[Matthew_ST]

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

​

[Pavel A.]

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