Oliver Neukum schrieb:
> Am Freitag, 16. Februar 2007 18:58 schrieb Sven Anders:
>> Variant 1:
>> If the completion handler decides, that there is no finger on the touchpad
>> any more, it does not call usb_submit_urb() again. The completion handler
>> stops. Via an kernel timer I will call the completion handler to test, if
>> there is a finger on the touchpad again. If so, I will restart the interrupt
>> handler and will call usb_submit_urb() until I have no finger on the pad
>> again.
>
> How are you going to tell whether a finger is on the pad without
> requesting data which means calling usb_submit_urb?
Yes, that's a good question!
My idea was (because I need some of the temperature data in regular intervals
anyways) to call the same function in greater intervals - so I can decide, if
I touch it.
It would be the best to tell the touchpad to stop sending and it should start
again, but I'm not sure how to do it. Is it possible to re-init a usb device
from the interrupt handler? If there is a way, I would try this - maybe the
device will stop and only begin on a re-touch...
Regards
Sven
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