PORTS Forum

Ports and Interfaces => USB => Topic started by: ulao on July 03, 2017, 06:10:18 pm

Title: do HID feature requests send VID PID?
Post by: ulao on July 03, 2017, 06:10:18 pm

I have 4 identical devices that differ only by PID. I run a 1 second loop for get feature requests and they pick up each other. I was under the impression that each request sends the address (VID,PID) so that is could be verified. Is this not true?

Title: Re: do HID feature requests send VID PID?
Post by: Jan Axelson on July 03, 2017, 08:33:08 pm

The address and endpoint fields specify the source or destination of data. See 8.3.2 and its subsections in the USB 2.0 spec.