[LinuxPPS] Kernel configuration and more ......

[Rodolfo Giometti]

On Mon, Oct 29, 2007 at 03:17:54PM +0000, Paul wrote:
> On Mon, 2007-10-29 at 15:04 +0100, Rodolfo Giometti wrote:
> > On Mon, Oct 29, 2007 at 01:39:10PM +0000, Paul wrote:
> > > First of all I compiled with the debugging messages. I got 4 events
> per
> > > second to the screen (this is why I need to know if debugging is for
> the
> > > PPS and/or GPS NMEA data).
> > 
> > Debugging are for both.
> 
> So I think the events I see are NMEA data, I can get the same if I
> modprobe ktimer (and then rmmod ktimer before it sends me crazy)

Can you please post them?

> > > I compiled exactly the same with no debugging.
> > > The /sys/class/pps/pps0/{assert/clear} remain at 0.000
> > > I checked the voltages on the serial plug and I saw the PPS pulses
> on
> > > the DCD pin. I checked with statserial (which actually looks at
> voltages
> > > on the serial pins) just to be sure I did not have a hardware
> problem.
> > 
> > Looking at /proc/interrupts, do you see increments on the IRQ counter
> > for the serial line?
> > 
> 
> No the serial stays the same.

So your system doesn't see any interrupt from the serial line... then
you can't see PPS events. Verify if your hardware is correctly setup.

> > Rodolfo
> > 
> 
> I also tried ./ppsfind ktimer which does not do anything.

Did you load ktimer module?

> ./ppstest /dev/pps0 just errors with timeouts.

Which error? Please, post it.

Ciao,

Rodolfo

-- 

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