clock

How to hook into the Apple clock timer API in iPhone SDK 3.0?

I have heard that there are some apps that hook into the Apple processes that will run in the background (namely, hooking into the Apple clock timer API), which will allow some non-UI background process on your 3rd party app to continue to run. Is this legitimate? Supposedly, there are some GPS-tracker apps that are using this and have p...

The C `clock()` function just returns a zero

The C clock() function just returns me a zero. I tried using different types, with no improvement... Is this a good way to measure time with good precision? #include <time.h> #include <stdio.h> int main() { clock_t start, end; double cpu_time_used; char s[32]; start = clock(); printf("\nSleeping 3 seconds...\n\n"...

How can I format a timestamp in Perl?

I would like to get this timestamps formatting: 01/13/2010 20:42:03 - - Where it's always 2 digits for the number except for the year, where it's 4 digits. And it's based on a 24-hour clock. How can I do this in Perl? I prefer native functions. ...

Producing a clock glitch in a verilog design.

I am designing a chip using a verilog. I have a 3 bit counter.I want that when the counter is in its 8th loop , there should be a clock glitch and thereafter work normally.What could be the possible ways of producing a clock glitch in a verilog design? ...

How to return time from AnalogClock/DigitalClock in Android

I need to obtain time from my AnalogClock as a String and pass it as argument in a method. Wonder whats the method of AnalogClock to return current Time. Thank you. ...

Code a timer in a python GUI in TKinter

I need to code a program with GUI in python (I'm thinking of using TKinter, 'cause it's easy, but I'm open to suggestions). My major problem is that I don't know how to code a timer (like a clock... like 00:00:00,00 hh:mm:ss,00 ) I need it to update it self (that's what I don't know how to do) ...

Is there something like clock() that works better for parallel code?

So I know that clock() measures clock cycles, and thus isn't very good for measuring time, and I know there are functions like omp_get_wtime() for getting the wall time, but it is frustrating for me that the wall time varies so much, and was wondering if there was some way to measure distinct clock cycles (only one cycle even if more tha...

Clock problem with FTDIchip FT2232 MPSSE mode

Hello, I'm trying to write/read to an extern device connected to a FTDIchip FT2232 MPSSE mode using SPI. I'm using the SPI function given by FTDI for Labview. I'm doing this: Open_Device - Init_Device - Write/Read - Close_Device The problem is that I don't have a clock signal on the scope when I try to read/write. Do you have a solut...

Create an incrementing timer in seconds in 00:00 format?

I want to create an incrementing second timer like a stopwatch. So I want to be able to display the seconds and minutes incrementing in the format 00:01... Google only brings up 24 hour clock examples, I was wondering could anyone get me started with an example or tutorial of what I want to do? Edit: Here is what I have using the Chr...

Monotonic clock on IRIX

I want to get a monotonic clock on IRIX, like: clock_gettime(CLOCK_MONOTONIC, &t); But CLOCK_MONOTONIC doesn't exist on IRIX. It has CLOCK_SGI_CYCLE, but that (as the names says) cycles too often (about every 90s on my machine in case you're interested). Is there any other (fairly high-res) clock that I can use, that isn't affected ...

Analog clock for Iphone application

I am developing an iphone application through xcode. I need to show a analog clock in my application. I can show the time in a digital clock but just not been able to show an analog clock. Looking forward to any kind of help. Thanks in advance Joy ...

How to create a JQuery Clock / Timer

I have a simple quiz application and I want display a nice timer / clock at the top of the page which shows the user how long they've been going for. (If I could somehow show them a timer for Total Quiz Time and also a second one for This Question Time that would be even cooler but I should be able to figure out how to do myself that onc...

How precise is the internal clock of a modern PC?

I know that 10 years ago, typical clock precision equaled a system-tick, which was in the range of 10-30ms. Over the past years, precision was increased in multiple steps. Nowadays, there are ways to measure time intervals in actual nanoseconds. However, usual frameworks still return time with a precision of only around 15ms. My questio...

How to get the time on the point that you click on the clock?

For instance, when you click the clock on the screen, there will pop up a notification/dialog which displays the exact time point. Anyone can tell me how to achieve this function? Thanks in advance! Maybe I should explain the "exact time point" . For example, there is a big analog clock on the screen. When you click around the dial, it...

AS3: Synchronize Timer event to actual time?

I plan to use a timer event to fire every second (for a clock application). I may be wrong, but I assume that there will probably be a (very slight) sync issue with the actual system time. For example the timer event might fire when the actual system time milliseconds are at 500 instead of 0 (meaning the seconds will be partially 'ou...

Python time.clock() - reset clock value with threads

Hi, I see time.clock() on Windows 'starts' a timer when called for the first time, and returns elasped time since the first call for calls after that. I read that the only way to restart the clock is to start a new process. Is starting and killing threads supposed to restart the time.clock() as well? It doesn't seem to be working righ...

Extremely CPU Intensive Alarm Clock

EDIT: I would like to thank you all for the swift replies ^^ Sleep() works as intended and my CPU is not being viciously devoured by this program anymore! I will keep this question as is, but to let everybody know that the CPU problem has been answered expediently and professionally :D As an aside to the aside, I'll certainly make sure...

Calculating CPU frequency in C with RDTSC always returns 0

Hi, The following piece of code was given to us from our instructor so we could measure some algorithms performance: #include <stdio.h> #include <unistd.h> static unsigned cyc_hi = 0, cyc_lo = 0; static void access_counter(unsigned *hi, unsigned *lo) { asm("rdtsc; movl %%edx,%0; movl %%eax,%1" : "=r" (*hi), "=r" (*lo) : /...

Problem measuring N times the execution time of a code block

EDIT: I just found my problem after writing this long post explaining every little detail... If someone can give me a good answer on what I'm doing wrong and how can I get the execution time in seconds (using a float with 5 decimal places or so), I'll mark that as accepted. Hint: The problem was on how I interpreted the clock_getttime() ...

Simple Android Binary Text Clock

Hello, I want to create a simple android binary clock but my application crashes. I use 6 textview fields: 3 for the decimal and 3 for the binary representation of the current time (HH:mm:ss). Here's the code: import java.text.SimpleDateFormat; import java.util.Calendar; import android.app.Activity; import android.os.Bundle; import an...