Koen Zandberg 7bfdd73818 usbus: Add URB support ... This commit adds support for URBs (USB Request/Response Blocks). These allow for submitting multi-transfer sized buffers with USBUS handling the individual usbdev xmits. Multiple URBs can be queued at once for a single endpoint and USBUS will handle them in the order of submission. OUT endpoint URBs must always consist of a whole number of full-sized transfers (N x MaxEndpointSize). They will automatically finish after the endpoint received a transfer less than the endpoint size. IN endpoints can be arbitrary-sized and do not have to consist of a whole number of full-sized transmissions. They support a flag to indicate that the last transfer in the sequence must be less than a full sized transfer (USBUS_URB_FLAG_AUTO_ZLP) and this adds a zero length transfer at the end of the transmissions if the last transfer was equal to the maximum transfer size. URBs can be cancelled, but if the URB is already being processed it will be cancelled after the current transmission within the URB is finished. If it is still in the queue it will immediately be removed from the queue.		2023-02-27 10:09:53 +01:00
..
usbus	usbus: Add URB support	2023-02-27 10:09:53 +01:00
Kconfig	sys/usb: enable common USB Kconfig for tinyUSB	2022-11-09 06:57:55 +01:00