HID remapper falls back to legacy mode

General
1

Hello!

I have a chinese touchpad, that imitates Apple Magic Pad (VID/PID 0x05ac/0x0265).

It has two HID report descriptors.

One as a touchpad device, that reports with ID 7:

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

And one as a mouse device, that reports with ID 2:

05010902a1010901a1000509190129031500250185029503750181029501750581010501093009311581257f750895028106950475088101c0c0050d0905a1010600ff090c150026ff0075089510853f8122c00600ff090ca1010600ff090c150026ff0085447508966b058100c0

When the touchpad connected to a PC, it reports inputs as a touchpad at ID 7.

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When it is connected to HID remapper, I believe, it falls back to a legacy mode, working as a mouse reporting at ID 2.

Is there a way to boot the touchpad in the proper mode?

wireshark_log

2

I don’t know anything about this particular device, but the trackpads I’ve seen (“Windows Precision Touchpads”) start in a mouse emulation mode (for compatibility presumably) and the host has to send some initialization for it to switch to multitouch mode. HID Remapper doesn’t have any logic for that currently.

3

That’s unfortunate. I’ve had some ideas about turning a touchpad to a SpaceMouse using multitouch for instantly selecting axes.

Should I create a feature request? Or realistically I have to try to implement these functions myself?