NTP PPS

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

Hello everyone!
I am using the TX2 4G version, I want to configure the NTP PPS, but after I modify the system configuration, the system cannot start normally, the configuration is as follows:
General setup
Timers subsystem
Timer tick handling
constant rate no dynticks
When I open ‘constant rate no dynticks’,The following error appears on the serial console:
qz-desktop login: Starting kernel …

[ 0.000000] Booting Linux on physical CPU 0x100
[ 0.000000] Linux version 4.9.140-tegra (qz@ubuntu) (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision d29120a424ecfbc167ef90065c0eeb7f91977701] (Linaro GCC 7.3-2018.05) ) #1 SMP PREEMPT Mon Dec 9 11:01:08 CST 2019
[ 0.000000] Boot CPU: AArch64 Processor [411fd073]
[ 0.000000] OF: fdt:memory scan node memory@80000000, reg size 16416,
[ 0.000000] OF: fdt: - 80000000 , 70000000
[ 0.000000] OF: fdt: - f0200000 , 85600000
[ 0.000000] OF: fdt: - 175e00000 , 200000
[ 0.000000] OF: fdt: - 176600000 , 200000
[ 0.000000] OF: fdt: - 177000000 , 200000
[ 0.000000] earlycon: uart8250 at MMIO32 0x0000000003100000 (options 'Password: 0200
8@96078000

[ 0.519220] pca953x 0-0077: failed reading register
[ 1.989159] ina3221x 0-0042: ina3221 reset failure status: 0xffffff87
[ 1.989599] ina3221x 0-0043: ina3221 reset failure status: 0xffffff87
[ 4.022708] cgroup: cgroup2: unknown option “nsdelegate”
[ 5.023783] nvgpu: disagrees about version of symbol wake_up_process
[ 5.030542] nvgpu: Unknown symbol wake_up_process (err -22)
[ 5.522619] nvgpu: disagrees about version of symbol wake_up_process
[ 5.531409] nvgpu: Unknown symbol wake_up_process (err -22)
[ 5.811198] using random self ethernet address
[ 5.817884] using random host ethernet address
[ 5.903064] using random self ethernet address
[ 5.909157] using random host ethernet address
[ 6.550585] CPU1: shutdown
[ 6.628999] CPU2: shutdown

How does this work out, thank you

2

Hi bbz595291850,

Please refer to this thread to see if can help: https://devtalk.nvidia.com/default/topic/1035352/pps-drivers-not-installing/

3

I have seen this post and installed this. My PPS has input signal (GPS has been located), but NTP cannot read PPS signal:

qz@qz-desktop:/boot$ cat /sys/class/pps/pps0/assert
0.000000000#0
qz@qz-desktop:/boot$
qz@qz-desktop:/boot$ ntpq -p
remote refid st t when poll reach delay offset jitter

0.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
1.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
2.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
3.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
ntp.ubuntu.com .POOL. 16 p - 64 0 0.000 0.000 0.000
PPS(1) .PPS. 0 l - 64 0 0.000 0.000 0.000
*SHM(0) .GPS. 0 l 14 16 377 0.000 -2.867 6.476
SHM(1) .PPS. 0 l - 16 0 0.000 0.000 0.000

4

Does it verify on any others platform?

5

This is the only platform I have