[ntp:questions] Re: which 2.6 linux PPS API for oncore modules??
michael.no.spam.cook at wanadoo.fr
Tue Aug 9 18:44:16 UTC 2005
Richard B. Gilbert wrote:
> mike wrote:
>> I have just got an ONCORE VP and am trying to tie it
>> to my Mandrake 22.214.171.124 distrib with ntp 4.2.0.
>> I have reconfigured, with ./configure --enable-ONCORE and connected
>> it to my homegrown pc's serial port 1 with the modules PPS output is
>> cabled to the DCD line.
>> I have the links:
>> [root at quark dev]# ls -l oncore*
>> lrwxrwxrwx 1 root root 5 Aug 8 15:11 oncore.pps.1 -> ttyS1
>> lrwxrwxrwx 1 root root 5 Aug 8 15:10 oncore.serial.1 -> ttyS1
>> and ntp.conf lines:-
>> server 127.127.30.1
>> fudge 127.127.30.1 stratum 0 refid VP-1
>> my ntp.oncore.1 config file has
>> [root at quark dev]# cat /etc/ntp.oncore.1
>> # Oncore VP configuration file
>> # Long/Lat/Height are for my office window :- E 002° 16.3015 / N 48°
>> 47.3281 / 212.85m
>> # ----- mandatory lines ----------------
>> MODE 4 <==== I tried other modes.
>> LONG 002 16.3015
>> LAT 48 47.3281
>> HT M 212.85
>> # ----- optional lines ------------------
>> DELAY 32 NS
>> MASK 0
>> On ntpd startup I get a know the error sequence.
>> Aug 8 09:41:23 quark ntpd: refclock_newpeer: clock type 30
>> Aug 8 09:41:23 quark ntpd: configuration of 127.127.30.1 failed
>> Almighty Goog has informed me that this is due to that fact that I do
>> not have the PPS API available, and indeed, the NTP 4.2.0 driver
>> source confirms.
>> I have seen here and elsewhere that a PPSkit is not available for 2.6,
>> but in the source tree I see that Ulrich has created a PPS-light..
>> That looks promising, but is in the form of an autogenerated diff patch
>> and does not fit to my code base.
>> My 126.96.36.199 source tree linux/CREDITS has Ulrich's contrib info at
>> line 3458, but the diff has that at
>> @@ -3422,7 +3422,7 @@
>> So if even the CREDITS aren't compatible, I hesitate to proceed.
>> Has anyone installed this against 188.8.131.52 or later?
>> Current Linux is 184.108.40.206, so I can go there is anyone has new diffs,
>> but I am reluctant to go back to 2.6.5 from which the above patch
>> diffs were taken.
>> There is another linux PPS API that Rodolfo Giometti has created
>> (http://www.enneenne.com/projects/linuxpps) which may be useful, but I
>> cannot see if it can be used by the 4.2.0 oncore driver without
>> changes to the driver.
>> Has anyone used this succesfully with the oncore driver?
>> Any help appreciated.
> Grab a copy of the refclock_oncore.c source from the latest tarball
> <ftp://ftp.udel.edu/pub/ntp/ntp4/snapshots/ntp-dev> and replace what you
> have with it. The 4.2.0 oncore driver had some code that prevented it
> from building. You are getting the "clock type 30" invalid because the
> oncore driver did not build. Note that you should replace ONLY the
> oncore driver unless you REALLY want to run the "bleeding edge" code.
> The latest version should have the patch(es). I ran into the same
> problem about nineteen months ago. Getting it going was a nightmare and
> I never could have done it without extensive help from the maintainer.
Looks like I am still missing something:
I could not get to the ftp site, so I pulled ntp-dev-4.2.0b-20050808
from the http site and copied its refclock_oncore.c to the ntpd dir.
[mike at quark ntp-4.2.0]$ ls -l ntpd/*oncore.c
-rw-r--r-- 1 mike home 108678 Aug 9 15:27 ntpd/refclock_oncore.c
[mike at quark ntp-4.2.0]$ sum ntpd/*oncore.c
then remake and installed the daemon but the .configure output
checking NMEA GPS receiver... yes
checking for ONCORE Motorola VP/UT Oncore GPS... no ???
checking for Palisade clock... yes
The driver compiles, but non of the code is included. I just see 1 int
refclock_oncore_bs which is probably due to CLOCK_ONCORE not being defined.
I tried forcing a compile by defining CLOCK_ONCORE, but I get loads of
errors, starting with
refclock_oncore.c:203: error: syntax error before "pps_handle_t"
refclock_oncore.c:203: warning: no semicolon at end of struct or union
refclock_oncore.c:204: warning: type defaults to `int' in declaration of
refclock_oncore.c:204: warning: data definition has no type or storage class
202 int shmemfd; /* Status shm descriptor */
203 pps_handle_t pps_h;
204 pps_params_t pps_p;
I am wondering if this is the code I should be using?
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