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Update 'USB config & command protocol'

Triss 2021-08-17 22:16:10 +00:00
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USB-config-%26-command-protocol.md

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# Wire protocol
The device has a "configuration and command" USB *vendor* interface, it has subclass number 42, and protocol number 69. The VID/PID pair is currently cafe:1312. as you may have noticed, these magic identification numbers are still temporary.
The device has a "configuration and command" USB *vendor* interface, it has subclass number 68 ('D'), and protocol number 80 ('P'). The VID/PID pair is currently cafe:1312.
The host sends a message and the device sends a reply. The device never initiates a transfer.