how to get HID usb port information

[nxpfrankli]

we have two board A and B connected to one PC, with the same chip, the same vid and pid, no serial number info.

How to get usb port information for each board?

libusb/libusb#885

[Youw]

There is no "official" way. You're expected to use fields of hid_device_info do distinguish your devices (all, but path), and serial_number is primary for this purpose.

Unofficial way: if you know exactly the version of hidapi library you use (and not relying on a system-installed instance), you may try to parse the path. See https://github.com/libusb/hidapi/blob/master/libusb/hid.c#L487
But I strongly do not recommend doing so, if you could use serial_numbers instead.
path is platform/backend - specific, and it won't work, for instance, if you choose to switch from libusb to hidraw backend.

Also, see #117.

[nxpfrankli]

Our ROM have not provided serial_number info.

Our software work well with libusb at windows and linux.
we need a better solution cross windows, linux and macos.

[Youw]

If you need a reliable cross-platform solution - update your ROM to provide a serial_number.
Using path is not reliable nor easy to implement.

I cannot suggest you anything else.

If you wan't to continue a discussion, please use https://github.com/libusb/hidapi/discussions/categories/q-a instead.