[LinuxPPS] ntp-dev-4.2.5p237-RC does sync with PPS for me

[William S. Brasher]

On Wed, 28 Oct 2009, Rodolfo Giometti wrote:

> On Tue, Oct 27, 2009 at 04:52:36PM -0500, William S. Brasher wrote:
> > On Tue, 27 Oct 2009, Rodolfo Giometti wrote:
> > 
> 
> 
> It should depend on PPS mode is set... maybe we should change ppstest
> program as follow:
> 
> diff --git a/Documentation/pps/ppstest.c b/Documentation/pps/ppstest.c
> index d911bf6..6f73a02 100644
> --- a/Documentation/pps/ppstest.c
> +++ b/Documentation/pps/ppstest.c
> @@ -54,7 +54,7 @@ int find_source(char *path, pps_handle_t *handle,
> int *avail_m
>         }
>         params.assert_offset.tv_sec = 0;
>         params.assert_offset.tv_nsec = 675;
> -       params.mode |= PPS_CAPTUREASSERT | PPS_OFFSETASSERT;
> +       params.mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT;
>         ret = time_pps_setparams(*handle, &params);
>         if (ret < 0) {
>                 fprintf(stderr, "cannot set parameters (%m)\n");
> 
> In order to force PPS_CAPTUREASSERT only on all sources.
> 
> Can you please try this modification?
> 
> Ciao,
> 
> Rodolfo
> 
> -- 
> 
> GNU/Linux Solutions                  e-mail: giometti at enneenne.com
> Linux Device Driver                          giometti at linux.it
> Embedded Systems                     phone:  +39 349 2432127
> UNIX programming                     skype:  rodolfo.giometti
> Freelance ICT Italia - Consulente ICT Italia - www.consulenti-ict.it
> 
> 


Done.  The result is the same.  Ntpd rejects pps out of hand:

root at spectre: # ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
xGPS_NMEA(0)     .GPS.            0 l   12   16  377    0.000  107.412  13.774
xPPS(0)          .PPS.            0 l   11   16  377    0.000  107.412  13.630
*chronos         .PPS.            1 u   37   64  177    0.113   41.837  35.745



and the clear sequence number is not advancing:

root at spectre: # ppstest /dev/pps0
trying PPS source "/dev/pps0"
found PPS source "/dev/pps0"
ok, found 1 source(s), now start fetching data...
source 0 - assert 1256735232.886904849, sequence: 456 - clear  1256734786.998287980, sequence: 10
source 0 - assert 1256735233.886712462, sequence: 457 - clear  1256734786.998287980, sequence: 10
source 0 - assert 1256735234.886520177, sequence: 458 - clear  1256734786.998287980, sequence: 10
source 0 - assert 1256735235.886327307, sequence: 459 - clear  1256734786.998287980, sequence: 10
source 0 - assert 1256735236.886135754, sequence: 460 - clear  1256734786.998287980, sequence: 10