Questions tagged [pps]
12 questions
2
votes
0 answers
Configuring ACPI for PPS on GPIO pin
Update: This was a good learning experience but I discovered that my GPIO expander does not have the interrupt line connected, so I cannot achieve what I was hoping to do.
Instead I'm going to try investigating using one of the pins on my serial…
rgov
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1
vote
0 answers
Stratified sampling with multiple variables and probability proportional to size
I have a dateset that looks something like this
library(tidyverse)
library(TeachingSampling)
data(Lucy)
Lucy <- Lucy %>% select(ID,Level,Zone,Employees,SPAM)
head(Lucy)
ID Level Zone Employees SPAM
1 AB001 Small A 41 no
2 AB002…
Alex
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1
vote
0 answers
How can I write a pulse per second(PPS) signal that comes every 100 ms in C?
I am working on a MTS board in FreeRTOS. Right now I am focused on the GPS module and it has 2 signals. One for waking it up and another one called PPS which is a signal normally at 1 but that goes to 0 every 100ms. I need to write the code in C for…
Kappa
- 11
- 1
1
vote
0 answers
QNX: QNX 6.5.0 : Cannot find utility PPS
I currently have above version of qnx running on my target, but i cannot find pps utility. I have checked the file system but it is not available.
How can test this feature of QNX on my target?, Is there any way to install only PPS utility without…
nipanch
- 11
- 3
0
votes
0 answers
Unable to get any GlobalSat gps receiver data on gpsd or gpsmon - unknown timeout error and unchanged state
I am attempting to use a GlobalSat MR-350P-S4 gps receiver with PPS to synchronize the system clocks of various instruments.
I have previously been able to get data off of the gps using both gpsd (viewed data through gpspipe -r and cgps -s) and…
spencer_d
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- 1
0
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0 answers
How to interpret certain header fields in chrony's statistics and tracking log files?
When generating the statistics and tracking logs from chrony, I see the following headers (along with the accompanying data):
Tracking:
=== Date (UTC), Time, IP Address, St, Freq ppm, Skew ppm, Offset, L, Co, Offset sd, Rem. corr.,…
alemonade
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0
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0 answers
Getting the output of GPSMON shell command
I would like to obtain, within a python script, the value "pps" that the shell command "gpsmon" display in the terminal. I tried to capture the output of the command with this code:
import subprocess as sb
def gps_output(command):
output =…
0
votes
0 answers
rockpi pps signal input for time synchronization
Im new to rockpi and Im currently working on a project were I want to receive PPS through the GPIO pins of the rockpi for time synchronization. I’m not sure how to get the PPS on the pins of my choice or any pins for that matter. Can anybody suggest…
luke j
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- 1
0
votes
0 answers
What will be reason for GPS not getting selected in Chrony?
I'm trying to get the precise time using PPS from the GPS module using the chrony. But every time I'm getting '#-' before the Gps as shown below
MS Name/IP address Stratum Poll Reach LastRx Last sample …
Omkar Dixit
- 71
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- 7
0
votes
1 answer
chrony with gpsd and pps
On my PC I want to feed chrony from GPS. For this, I installed gpsd and pps-tools. I have a GPS connected to the serial port /dev/ttyS0 and the PPS is connected to the DCD input. Apparently, the PPS pulses are received correctly:
$ sudo ppscheck…
T. Pluess
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0
votes
1 answer
How to link the gpsd and the pps in the ntp.conf file?
I'm working on the AM335x custom board with yocto where "u-blox LEA-M8F" is used as a gps module.
Basically I wanted to use the "ntpd deamon" so while going through the internet i found that i suppose to link the gpsd and the pps to do so, i have…
Omkar Dixit
- 71
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- 7
0
votes
1 answer
PPS Number Validation iOS Swift
PPS number majorly used in Ireland. Its validation contains more calculation. How can we validate the PPS number in swift code?.
Abishek Thangaraj
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