* Sends a request (or a part of the request) to the control endpoint (ep0 in).
* If the request doesn't fit, the remaining part will be sent from irq.
* The request is considered fully written only if either :
* Sends a request (or a part of the request) to the control endpoint (ep0 in).
* If the request doesn't fit, the remaining part will be sent from irq.
* The request is considered fully written only if either :