Alan Stern schrieb:
> On Thu, 15 Feb 2007, Sven Anders wrote:
>
>> I tried to stop resubmitting (by NOT calling "usb_submit_urb" again) and I
>> hoped the the interrupt handler will continue when the touchpad is pressed
>> again, but it does not work.
>
>> A longer interval would solve it in some way:
>> I could get constantly new temperature update (each second or more) and if
>> the touchpad is touch, I can reduce the interval to the normal settings.
>
> It sounds like your completion handler should not call usb_submit_urb().
>
> Instead you should use a kernel timer. When the timer expires, its
> callback routine should call usb_submit_urb(). The callback should also
> determine whether the touchpad is being pressed, use that information to
> decide how long the next timer interval will be, and restart the timer.
Some idea I had myself.
Is it possible to use a mix? My idea is as follows:
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.
Variant 2:
If the is no finger on the touchpad, I will make the interval longer until
I have a finger on the pad again...
For variant 2 I want to know, if it is sufficent to set the 'interval'
variable in the urb struct to a new value or do I have to call a function?!
Regards
Sven
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