Questions tagged [system-clock]
130 questions
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3 answers
Changing the background of a button and sleep
I want to change the background of a button to red and then wait for one second before calling another activity.
This is my code:
btn1.setBackgroundColor(Color.RED);
SystemClock.sleep(1000);
startActivity(intent);
The problem is that the…
user1186043
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1
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1 answer
How does CLOCK_MONOTONIC handle NTP changes to the system clock?
Savvy engineers use clock_gettime( CLOCK_MONOTONIC, &my_timspec_struct ) to get a continuously increasing epoch-style clock that is "unaffected" by changes to the system clock. (Where the epoch-start is not defined).
However, CLOCK_MONOTONIC is…
Kingsley
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1
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2 answers
How to sync Raspberry Pi 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 have selected BR2_PACKAGE_RTC_TOOLS=y,…
Preeti
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1 answer
Where can I find the GCC 9 implementation of std::chrono::system_clock::now()?
The chrono system header (/usr/include/c++/9/chrono) declares, but does not define, the static now() functions of its clocks. I also do not see an include that looks relevant. Where are these functions implemented?
Felix Dombek
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1 answer
Is querying time/cycles a serialized or a parallel request for all cores/threads?
Assuming there is a simple "which thread finishes loop first" benchmark,
#include
#include
#include
int main()
{
std::mutex m;
std::thread t1([&](){
auto c1=clock();
for(int i=0;i<1000000;i++){ /*…
huseyin tugrul buyukisik
- 11,469
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1
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2 answers
PIC32MX System clock half of expected Value/Harmony
I recently started in a fresh company where the programer that did the PIC32 programming is now gone and I do need to troubleshoot his uC-Code.
He disliked the Microchip Harmony Configurator/Framework and thus he is only using the Peripheral Library…
Side2005
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- 4
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2 answers
Realtime CPU clock vs High Frequency Software clock
I am curious to learn about the technology which is used in generating software clock in simulators. The frequency of my machine is only ~2.4GHz but I can generate up to 500THz clock using a simulator(Refer below system Verilog snippet ).
`timescale…
Sreejin TJ
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1
vote
1 answer
system_clock returning negative time c++
I'm writing code to time a for loop, and I used code given to me by my professor, and it uses system_clock.
My problem is that on one of my for loops that I am timing, it is returning a negative time. Sometimes it's different number, but always…
Cheyanne
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1 answer
Show Windows 10 native clock widget programmatically
So I use a clock replacement program. The problem is it also hijack clicks on the clock. So whenever I click on the clock in the notification area, program's popup menu launch rather than the default windows clock widget.
I also tried AHK…
user2286243
1
vote
1 answer
External Crystal Connection
Hello I am developing a evaluation board for STM32F427. I am connecting an external RTC IC (DS3231). Do i need to connect an other external oscillator for processor? Because in STM32F407 discovery board they have connected an external 8MHz crystal…
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2 answers
How to manually change linux system time?
I have Mint Linux running in a VM.
I tried through the GUI to set the date to an earlier date so I could try to mimic a database issue that occurred on production on that date.
I tried to use the date command.
Both times, within a few seconds the…
rmcsharry
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1
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1 answer
Visual Clock: New to Processing
Back again with my visual clock. I need a bit of guidance. I am trying to make a "clock" graph that counts down the time (in hours) until event times that a user inputs, such as until they eat dinner, sleep etc. In my sketch, "now" is the dark grey…
Madeline Engle
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0 answers
Instanced Clocks in C++11
The new clocks in the std namespace all appear to be statically instantiated. high_resolution_clock is not a class of clocks with high resolution, but rather the system-wide high resolution clock, with static methods such as now.
I understand why…
Cort Ammon
- 10,221
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1 answer
reading the system clock value?
Is there a virtual/system clock running independently when a computer is booted?
How can we read that value?
pvaju896
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1 answer
Is it possible to build a pure internal NTP system?
I have four machines running Ubuntu 14.04, one is a software router and the others connect to it. I installed NTP on each of them.
What I want is to synchronize clocks among these four machines, with the router acting as the NTP server and the other…
hebothu
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