[LinuxPPS] Debugging the pps

[Marc Leclerc]

Another info I may need,

if i try to connect the pps to the parallel port, i assume i need to 
connect to the ACK pin?
is there any special requirements in device node / links creation
Is there any special requirements in pulse polarity

Thanks again

On 2011-04-26 15:25, Marc Leclerc wrote:
> Hi,
>
> I have moved to a new board x86 based and compiled kernel 2.6.34.7 with
> pps support + line discipline. I have a gps module hooked to ttyS1 + the
> pps to pin 1 DCD. We checked the pps signal with a scope and it does get
> to the pin. when the kernel boots I do see the message that pps line
> discipline is registered. I did create the pps device + links for ntp.
> as for the gps it does work ok with ntp. problem is there is no sign of
> pps at all. the /sys/class/pps is empty and there are no messages
> appering in the logs (dmesg) that the pps is doing anything beside being
> registered. I have also enabled debugging support but no further sign.
> Also tried the patch for kernel consumer. Any clue on the steps I could
> take to find what's wrong.
>
> Regards
>
>
>
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