[LinuxPPS] Not seeing PPS with new stuff (More2)

[Rodolfo Giometti]

On Wed, Jun 11, 2008 at 03:07:20AM -0600, clemens at dwf.com wrote:
> > 
> > A line discipline is referred to a serial port so you have to use the
> > command:
> > 
> >    $ ./ttyctrl -X -s 17 /dev/ttyS0
> > 
> OK, a bit better.
> with 2.6.24.4-PPS-quater + patch in linuxPPS, when I run
> 
>     ./ttyctrl -X -s 17 /dev/ttyS0
> 
> It runs, creates /dev/pps1, BUT NEVER COMPLETES.  The job is still sitting 
> there
> and is IMPOSSIBLE to kill.

What about kernel messages? Did you see something like "PPS source #0
"/dev/ttyS0" added"?

> When I run your ppstest, I see
> 
> [root at deneb pps]# ./ppstest /dev/pps1
> trying PPS source "/dev/pps1"
> found PPS source "/dev/pps1"
> ok, found 1 source(s), now start fetching data...
> time_pps_fetch() error -1 (Connection timed out)
> time_pps_fetch() error -1 (Connection timed out)

Did you enabled the IRQ on the serial port? Take a look at
/proc/interrupts to see if IRQs are arriving from the serial lines.

> and when I run my slightly modified version, I see
> 
> [root at deneb Testing]# ./rodolfo6 /dev/pps1
> fd2 = 3
> getcap says 0x1133
> set mode to 0xbfc5b9db
> getparam is 0x1133
> Enter loop
> 
> getparam is 0x1133
> getparam assert is 0  0000675
> getparam clear  is 0  0000000
> A: 1213174047.015311729 #44     C: 1213174047.213825757 #44
> 
> and it is killable.
> 
> Checking /sys/class/pps/pps1 I see
> 
> [root at deneb pps1]# more assert ; more clear
> 1213174047.015311729#44
> 1213174047.213825757#44
> 
> So it seems to have counted to 44 and then hung...

Or the system stops recording PPS events... can you please enable
DEBUGging kernel messages and report?

Ciao,

Rodolfo

-- 

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