Re: USBDEVFS_URB_TYPE_INTERRUPT

Thomas Sailer (sailer@scs.ch)
Wed, 06 Jun 2001 11:01:48 +0200


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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/