[LinuxPPS] Fw: weird

[Rodolfo Giometti]

On Tue, Aug 01, 2006 at 04:12:48PM +0200, Folkert van Heusden wrote:
> I have this feeling pps does not work for my setup.
> 
> ntp.conf:
> server  127.127.22.0 prefer          # ATOM (PPS)
> fudge   127.127.22.0 flag3 1         # enable PPS API

To test LinuxPPS, please, use simpler tools like "ppstest.c". Once you
are sure LinuxPPS works correctly then start using NTPD.

> dmesg:
> [42949425.080000] "pps_core":"pps"[310]: netlink protocol 17 created
> [42949425.080000] "pps_core":"procfs"[80]: procfs enabled
> [42949425.080000] "pps_core":"pps"[322]: LinuxPPS API ver. 1 registered
> [42949425.080000] "pps_core":"pps"[323]: Software ver. 2.0.0 - Copyright 2005-2006 Rodolfo Giometti <giometti at linux.it>

You are using an old LinuxPPS version, please update to the last one
(2.2.0).

> [42949425.130000] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
> [42949425.430000] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> [42949425.730000] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> [42949431.570000] 00:07: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> [42949431.610000] 00:08: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> ...
> [42949458.030000] "pps_core":"pps"[82]: New message from PID 4158 (flags 0)
> [42949458.030000] "pps_core":"pps"[91]: PPS_CREATE: source 5
> [42949458.030000] "pps_core":"pps"[82]: New message from PID 4158 (flags 0)
> [42949458.030000] "pps_core":"pps"[174]: PPS_GETCAP: source 5
> [42949458.030000] "pps_core":"pps"[82]: New message from PID 4158 (flags 0)
> [42949458.030000] "pps_core":"pps"[116]: PPS_SETPARMS: source 5
> [42949458.030000] "pps_core":"pps"[82]: New message from PID 4158 (flags 0)
> [42949458.030000] "pps_core":"pps"[174]: PPS_GETCAP: source 5
> [42949458.030000] "pps_core":"pps"[82]: New message from PID 4158 (flags 0)
> [42949458.030000] "pps_core":"pps"[116]: PPS_SETPARMS: source 5
> [42949458.030000] "pps_core":"pps"[82]: New message from PID 4158 (flags 0)
> [42949458.670000] "pps_core":"pps"[82]: New message from PID 4158 (flags 0)
> [42949458.670000] "pps_core":"pps"[189]: PPS_FETCH: source 5
> [42949459.670000] "pps_core":"pps"[82]: New message from PID 4158 (flags 0)
> [42949459.670000] "pps_core":"pps"[189]: PPS_FETCH: source 5
> etc.

Here are the commands that NTPD sends to LinuxPPS but I do NOT see the
PPS events! Remeber that the userland application sometimes has to
send some special commands to the GPS antenna in order to enable PPS
signal. Have you enabled the PPS support for your NTPD'sspecific
driver?

Please refere to the Wiki for further informations.

Ciao,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail:    giometti at enneenne.com
Linux Device Driver                             giometti at gnudd.com
Embedded Systems                     		giometti at linux.it
UNIX programming                     phone:     +39 349 2432127
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