[LinuxPPS] LinuxPPS with 'nano' support cookbook recipe

[Udo van den Heuvel]

Remco den Besten wrote:
> 1. Apply everything necessary to implement microsupport (LinuxPPS), see this 
> list ;-)

See the wiki:
http://wiki.enneenne.com/index.php/LinuxPPS_support#The_userland_tools
(still is true for the links etc; `ppstest and ppsctl` paragraph needs
ppsldisc mention)

> 2. Apply the patch from James to /usr/include/sys/timex.h
> 3. Create the symlink: ln -s /usr/include/sys/timex.h /usr/include/timex.h
> 4. re-../configure ntp (' ../configure <insert options> ') and make the ntp 
> sources ('make')

Correct.

> 5. in ntp-source tree go to ntpd directory and strip ntpd (' strip ntpd ' )
> 6. stop currently running ntpd and start new ntpd (' sudo ./ntpd ')

start ppsldisc /dev/ttySx before starting ntpd...
> (optional: do a make install within the ntp source tree)

rpmbuild -bb SPECS/ntp.spec on my fedora box does the same.
rpm -Uvh RPMS/bla/ntp-etc...rpm for insatlling.

> To monitor the behaviour of the new ntpd, use the tools and commands from 
> the freshly
> compiled ntp-source (see subdirs ntpq, ntpdc, etc. and utils) otherwise 
> erroneous values
> will and/or may be reported.

ntptime will show nano support if all is well:

# ntptime
ntp_gettime() returns code 0 (OK)
  time cc35689a.c1f383a8  Sat, Jul 26 2008 11:10:50.757, (.757622621),
  maximum error 3338 us, estimated error 1 us
ntp_adjtime() returns code 0 (OK)
  modes 0x0 (),
  offset 352.967 us, frequency -70.965 ppm, interval 1 s,
  maximum error 3338 us, estimated error 1 us,
  status 0x2001 (PLL,NANO),
  time constant 4, precision 0.001 us, tolerance 500 ppm,


Udo