On Tue, 18 May 2004, Roman wrote:
> That is, TDs one transaction can settle down in different Queues or
> there is a rule of their arrangement?
All the TDs for one transaction must belong to the same queue.
> Please, describe what TDs it is necessary to send the controller and
> in what order, by the example of control transfer. And if that is
> probably for everyone transfer's type.
Here are the TDs for a control-out transfer:
SETUP, OUT, OUT, ... (as many as needed for the amount of
data you want to transfer), IN
Here are the TDs for a bulk-in transfer:
IN, IN, ... (as many as needed for the amount of data you
want to transfer)
An interrupt-in transfer should have only one TD:
IN
An isochronous-out transfer will have one TD for each period. Note that
TDs for isochronous transfers are not stored in queues:
OUT
Alan Stern
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