Re: [Madwifi-devel] Interrupt Driven Microsecond Timer - Stuck in IEEE80211_S_INIT

[Dan D. <dde...@gm...>]

Eric/Amy

I have been able to set the beacon timers in monitor mode to get a
reasonably accurate timer. There is still jitter but rather low. But I
cannot set the state to RUN. When calling ath_newstate without commenting
the callback (avp->av_newstate()) at the bottom results in a lock up.

Any ideas?
Dan
On Wed, Mar 19, 2008 at 10:02 AM, Amy Lu <mei...@an...> wrote:

> Hi Eric,
>
> Do you mean "hardware-triggered" timer? If so, I'd be very interested to
> know how you do that. I need a 10-microsecond resolution  timer. However,
> linux does not provide timers with that high resolution. (mdelay and
> udelay
> are just busy polling...)
>
> Thanks,
> M-H.
>
>
> -----Original Message-----
> From: Eric W Anderson [mailto:Eric.Anderson@Colorado.EDU]
> Sent: Wednesday, March 12, 2008 2:42 PM
> To: prasad hegde
> Cc: Dan Dechene; mad...@li...
> Subject: Re: [Madwifi-devel] Interrupt Driven Microsecond Timer
>
> I think I've mentioned this before on this list, but our group has done
> timing
> work using the card's on-chip clock.  It's pretty easy to do; what are you
> trying to do, and what do you mean by "interrupt-driven"?
>
> Thus spake prasad hegde (pra...@gm...):
>
> >    Hi,
> >
> >    AFAIK    do_gettimeofday( struct timeval *tv)  provides time in
> >    microsecond resolution in kernel.
> >
> >    Thanks
> >    Prasad
> >
> >
> >    On 3/12/08, Dan Dechene <dde...@gm...> wrote:
> >
> >      Hi All,
> >
> >      I wanted to know if anyone has implemented a microsecond resolution
> >      timer in the driver. I am assuming that this would be hardware
> driven,
> >      but am unsure.
> >
> >      Any assistance would be appreciated,
> >
> >      Thanks
> >
> >      Dan
> >
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> --
> Eric W. Anderson                                   University of Colorado
> eri...@co...                      Dept. of Computer Science
> phone: +1-720-984-8864                   Systems Research Lab - ECCR 1B54
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