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SubjectRe: USBDEVFS_URB_TYPE_INTERRUPT
John Chris Wren schrieb:

> I don't really want to write a full-up kernel mode driver for this device,
> but interrupt type messages are the preferred method for communicating,
> since once a message needs to be sent, it should be timely (whereas control
> messages could be delayed a significant amount on a busy USB channel).

If you critically depend on tight timing you'll need a kernel driver
anyway, as your usermode task might be delayed on a busy machine too.
Otherwise you can use bulk ins timed from userspace

Tom
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