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521 B
521 B
Handling GET_DESCRIPTOR Configuration Requests
When the host issues a GET_DESCRIPTOR Configuration request the device needs to respond with the requested configuration descriptor plus all the interface and endpoint descriptors associated to that configuration descriptor during the DATA stage.
A GET_DESCRIPTOR Configuration request is a GET_DESCRIPTOR request where the descriptor type encoded in the high bit of wValue
is CONFIGURATION.
Let's look into all the concepts required to respond to this request.