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Newest 'system-clock' Questions - Raspberry Pi Stack Exchange
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Learn more about TeamsQuestions tagged [system-clock]
The system clock is part of the operating system that keeps time. The Raspberry Pi does not have a hardware clock, so for correctness the time is usually kept synced with a network source. It is also possible to add a clock device.
58 questions
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0
votes
0
answers
95
views
Undefined reference to set_sys_clock_khz
I am trying to build this repo:
https://github.com/brendena/pico_device_and_host
However, after:
cmake ..
make
I get this:
[100%] Linking CXX executable USB_DEVICE_AND_KEYBOARD.elf
Memory region ...
0
votes
1
answer
220
views
Pi 400 Bullseye 11 digital clock format from 24-hour to 12 hour
Currently:
Digital Clock
Format %R
Tool tip format %A %x
Thank you in advance.
EDIT:
%R 24 hr %r 12 hr.
2
votes
0
answers
2k
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How to make system clock to synchronize? [closed]
I bought a new RPi 4 model B.
When doing the setup and setting an Internet connection, the RPi told me that the clock could not synchronize. After a couple of attempts I continued anyway, and obviusly ...
3
votes
2
answers
436
views
Is running code in a pauseless loop damaging to the Pico W?
While True in main.py
Also good to know how inserting sleeps does or does not affect any clock cycles and if so by how much.
- 157
-1
votes
2
answers
3k
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Why does the reported Pico W clock speed differ from its datasheet?
Datasheet: Up to 133mhz
print(str(machine.freq())) = 125000000 (hz, presumably)
- 157
0
votes
0
answers
3k
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How to sync system clock?
I have built a custom Linux OS for Raspberry Pi CM4 using Buildroot. I am able to boot it but my system clock is not synchronized. Its set to some static time and I want to show real time instead. I ...
1
vote
2
answers
666
views
RasPi resets fake-hwclock time on USB Stick on reboot (Overlay FS)
Introduction:
To make sure my RasPi has the longest possible live duration, i've enabled read-only boot partition as well as the overlay filesystem.
I want to save the fake-hwclock.data (current ...
2
votes
0
answers
939
views
use internal clock (ROSC) to set system clock (clk_sys) to run at 32 MHz in RP2040
I am trying to set the system clock of my RP2040 to 32MHz using the internal clock(rosc) as source clock. When the pico board is powered on, the ROSC's frequency is around 5 MHz which lies in the ...
4
votes
1
answer
320
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systemd-timesyncd always restarted once got Router Advertisement
On raspberry pi os, pi zeor 2 w, the systemd-timesyncd always restat once received Router Advertisement from router
The messages are like following:
Nov 28 12:22:46 raspberrypi dhcpcd[837]: wlan0: ...
5
votes
8
answers
29k
views
Raspberry pi cannot synchronize clock
I have bought three raspberry pi's with the intention of using them as temperature sensors throughout the building. I have bought the following models:
1 raspberry pi 4 model b 2gb
2 raspberry pi 4 ...
-1
votes
1
answer
112
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Scaling down the SPI0 clock value on RPi 3B+/4B
I have a custom STM32 MCU board that interfaces with an RPi 3B+ via the SPI protocol. The MCU (STM32F407) has its SPI peripheral clock set at 84MHz and is configured as a slave device. For reliable ...
0
votes
3
answers
678
views
How to sync clock on raspberry pi with restricted internet traffic
I have a few raspberry pi's operating at a customer facility, and this facility has restricted the pi's traffic to only the IP of my server (digital ocean ubuntu droplet running a django application). ...
1
vote
2
answers
421
views
My applications clock(date and time) is too fast?
I have an electron.js application installed in a raspberry pi. The app displays date and time, the initial date and time is taken from a server and is incremented on the application using setInterval ...
0
votes
0
answers
75
views
I custom build rpi kernel that I misconfigured as the time specific syscalls return bad values. What steps should I take to debug this?
Jump down to edit 2 to see the most current information I have on this question. I am leaving everything else as a preamble explaining the situation.
I am setting up my first RPi to be a home DNS ...
2
votes
2
answers
1k
views
Allow non-root user to set system time
I am using Raspbian Buster on an Raspberry Pi 4. I would like to give permissions to a non-root user to be able to set the time with /bin/date -s. The user is going to be used to run a python script ...
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