[LinuxPPS] gps_nmea error

[Ritter, Nicholas]

Sorry about the formatting....on that, here is the ppstest output again:

 [root at RMSQSN1001 pps]# ./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 1218565941.998604265, sequence: 379 - clear
1218565941.198623483, sequence: 378

source 0 - assert 1218565941.998604265, sequence: 379 - clear
1218565942.198604006, sequence: 379

source 0 - assert 1218565942.998602599, sequence: 380 - clear
1218565942.198604006, sequence: 379

source 0 - assert 1218565942.998602599, sequence: 380 - clear
1218565943.198601804, sequence: 380

source 0 - assert 1218565943.998602236, sequence: 381 - clear
1218565943.198601804, sequence: 380

source 0 - assert 1218565943.998602236, sequence: 381 - clear
1218565944.198621967, sequence: 381

source 0 - assert 1218565944.998602726, sequence: 382 - clear
1218565944.198621967, sequence: 381

source 0 - assert 1218565944.998602726, sequence: 382 - clear
1218565945.198605749, sequence: 382



-----Original Message-----
From: linuxpps-bounces at ml.enneenne.com
[mailto:linuxpps-bounces at ml.enneenne.com] On Behalf Of Ritter, Nicholas
Sent: Tuesday, August 12, 2008 1:30 PM
To: linuxpps at ml.enneenne.com
Subject: Re: [LinuxPPS] gps_nmea error

ok....thats what I was doing wrong....

Here is what I just did then:

[root at RMSQSN1001 pps]# lsmod
Module                  Size  Used by
pps_ldisc               3392  0 
pps_core                9248  1 pps_ldisc
binfmt_misc             9676  1 
e1000e                 95332  0 
rtc_cmos               10168  0 
skge                   37456  0 
iTCO_wdt               12048  0 
iTCO_vendor_support     3716  1 iTCO_wdt
rtc_core               15684  1 rtc_cmos
i2c_i801                9436  0 
rtc_lib                 2880  1 rtc_core
i2c_core               20128  1 i2c_i801
ata_piix               19844  2 


[root at RMSQSN1001 pps]# ./ppsldisc /dev/ttyS0

and in another terminal window:

[root at RMSQSN1001 pps]# ./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 1218565717.998631126, sequence: 155 - clear
1218565717.198647057, sequence: 154 source 0 - assert
1218565717.998631126, sequence: 155 - clear 1218565718.198647505,
sequence: 155 source 0 - assert 1218565718.998630734, sequence: 156 -
clear 1218565718.198647505, sequence: 155 source 0 - assert
1218565718.998630734, sequence: 156 - clear 1218565719.198630829,
sequence: 156 source 0 - assert 1218565719.998629214, sequence: 157 -
clear 1218565719.198630829, sequence: 156 source 0 - assert
1218565719.998629214, sequence: 157 - clear 1218565720.198645608,
sequence: 157 source 0 - assert 1218565720.998629512, sequence: 158 -
clear 1218565720.198645608, sequence: 157 source 0 - assert
1218565720.998629512, sequence: 158 - clear 1218565721.198642570,
sequence: 158 source 0 - assert 1218565721.998629590, sequence: 159 -
clear 1218565721.198642570, sequence: 158 source 0 - assert
1218565721.998629590, sequence: 159 - clear 1218565722.198648781,
sequence: 159 source 0 - assert 1218565722.998630000, sequence: 160 -
clear 1218565722.198648781, sequence: 159 source 0 - assert
1218565722.998630000, sequence: 160 - clear 1218565723.198643706,
sequence: 160 source 0 - assert 1218565723.998629716, sequence: 161 -
clear 1218565723.198643706, sequence: 160


That output looks better....except that should I see two entries for
each pulse?

I should go back and look on the list for the instructions for the udev,
etc....granted.

Nick

-----Original Message-----
From: linuxpps-bounces at ml.enneenne.com
[mailto:linuxpps-bounces at ml.enneenne.com] On Behalf Of Udo van den
Heuvel
Sent: Tuesday, August 12, 2008 1:22 PM
To: linuxpps at ml.enneenne.com
Subject: Re: [LinuxPPS] gps_nmea error

Ritter, Nicholas wrote:
> I unloaded the pps related modules and reloaded them and noticed that 
> the kernel does not see any PPS pulse unless the ktimer module is 
> loaded, us this the way it should be?

ktimer is fake PPS.
do the ppsldisc thingie and see /dev/pps0 appear

> Thanks Udo for the config example. I have confirmed that my GPS unit 
> is set to 200ms.

'works for me', not  the end-all answer.

Kind regards,
Udo

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