On Sat, 2013-12-21 at 20:19 +0800, Yingchun Li wrote:
> before I read the box, it seems
> the ACM driver will read the box automaticly(I find that from the usb
> sniffer). and there
> is a lot of READ-NAK packet.
> So could the box disable the automatic read by someway such as flow
> control, and
> until it ready for sending response?
No. The driver needs to be ready for the general case. That
includes devices giving out unsolicited data. That can happen
at any time.
Sorry
Oliver
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