Tinkerboard

[dropkick23 at gmail.com]

Well this is interesting!

Having seen Achim Gratz posts on the TinkerBoard, I purchased one.
Following his direction for building kernel with PPS I built the kernel,
gpsd and ntpsec.

$ ntpq -np
     remote                                   refid      st t when poll
reach   delay   offset   jitter
=======================================================================================================
+216.229.4.66                            216.229.0.179    2 u   65  128
 377  43.3647   6.4084   1.1088
+208.75.89.4                             216.218.192.202  2 u   78  128
 377  48.4814  -0.2700   0.9844
*70.59.91.235                            .PPS.            1 u   83  128
 377  52.3107   0.0303   0.6380
-23.227.178.17                           105.100.222.35   2 u   61  128
 377  71.3686  -2.4612   0.6974

NOTE: no shm

Details:

ntp.conf
refclock shm unit 1 maxpoll 4 refid PPS flag4 1 prefer
refclock shm unit 0 maxpoll 4 time1 0.133 refid GPS flag4 1

# ps -ef | grep ntp
ntp        539     1  0 10:08 ?        00:00:00 /usr/local/sbin/ntpd -g -u
ntp:ntp -c /etc/ntp.conf

# ntpd -V
ntpd ntpsec-0.9.7+1377 2017-09-18T00:43:35Z

# ntpq -V
ntpq ntpsec-0.9.7+1377 2017-09-18T00:43:35Z

# ps -ef | grep gpsd
nobody     440     1  0 10:08 ?        00:00:00 /usr/local/sbin/gpsd
/dev/gpsd0

# 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 1505755269.000676484, sequence: 189 - clear  0.000000000,
sequence: 0
source 0 - assert 1505755270.000661312, sequence: 190 - clear  0.000000000,
sequence: 0

# ntpshmmon
ntpshmmon version 1
#      Name Seen@                Clock                Real
L Prec
sample NTP0 1505755316.421692833 1505755316.129519142 1505755316.000000000
0 -20
sample NTP1 1505755316.421722583 1505755316.000362932 1505755316.000000000
0 -30
sample NTP1 1505755317.000616081 1505755317.000361256 1505755317.000000000
0 -30
sample NTP0 1505755317.130793217 1505755317.130444092 1505755317.000000000
0 -20
sample NTP1 1505755318.000698405 1505755318.000358413 1505755318.000000000
0 -30

# cgps -s
 shows data

 ntp built with:
$ git clone https://gitlab.com/NTPsec/ntpsec.git
$ cd ntpsec
$ sudo ./buildprep 2>&1 | tee prep.waf
$ ./waf configure –-refclock=shm 2>&1 | tee conf.waf
$ ./waf build 2>&1 | tee build.waf

Nothing in ntpd.log of interest WRT shm/pps/gps

Not sure what to look at to detemine what the error is.



Found the topic about stand alone NTP with multiple clock sources of
interest
the Tinker board has 4 UARTs, currently there is a patch for PPS on GPIO
pin 22
will need to figure out how to add another or two PPS to GPIO header.


Thanks
Fred
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ntpsec.org/pipermail/users/attachments/20170918/f7c62269/attachment.html>