I am new to here and hope someone can help.

I am developing a generic USB device which need to use
bulk data transfer, I can successfully use the
javax-usb to view my configuration and even to get the
pipe.

I read from previous post that, in order to receive
data, an emtpy buffer should be set first. I have
already tried this. And i can receive data. However, I
can only make this request once.

When I issuse the request again (I create another
InputThread using the same pipe). No data is receive,
and my usb device handed.

As both the device and the driver (javax-usb)are still
under development, I cant figure out which part fail
to  function. So I would like to know ,is there other
procedure or request or ACK I should issus after I
receiver the data correctly.

Can someone show me some codes on how to poll the Bulk
In pipe continously. This will help me much.

Thank you very much for your kind attention.
Thanks a lot.




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