Re: [Madwifi-devel] understanding TSF values in beacons

[Bruno R. <br...@ei...>]

On Thu October 28 2010 06:38:01 Eduard GV wrote:
> On Wed, Oct 27, 2010 at 7:22 AM, Bruno Randolf wrote:
> > The beacon is not sent immediately when it's queued, but at the time in
> > the NBTT register (TIMER0, Next Beacon Target Time - in TU).
> > I don't know if that is enough to explain your factor of 10?
> 
> Interesting. This is for sure one possible source of the problem. So
> the beacon leaves the queue at NBTT (if the medium is idle). Is this
> NBTT accessible from the driver? Maybe the variable nexttbtt?

Yes sc->sc_nexttbtt. The same value should also be in the HW register 
*_TIMER0. I'd rely on the HW value instead of the variable though...

bruno