Timers in C

[Soulphalanx]

^^ topic

could someone write me an example of creating, starting and getting the time of a timer in C?

thanks

[SG57]

...Your joking... You have the internet, resources, and your asking? PS2dev.org has the resources for such a thing, PSP-OSS's source has it, and your still asking?

Please do not ask around here to be spoon fed. you will not learn anything, Plus, i say you actually look at your freekin setup, the SDK has example already. Im sensing some script kiddies around lately...

P.S. In the C/C++ help thread, i am asking for help on rotation, which is not documented in the SDK, or in any source i can find (except rotating frames), or anywhere i could find (google), so this is not a hypicritical statement.

[Fanjita]

Oh come on, you were far worse when you first started coding. This forum is here for us to help each other.

To answer the original poster's question: I can't remember seeing any specific timer functions in the PSP API, nor do I remember any in stdlib.

However, you can easily do what you want by keeping an array of times. To start a timer, just read the current time into a slot in the array. To get how long the timer has been running, get the current time and subtract the value from the array slot. So long as you don't want to receive an event when the timer reaches a certain value, this is a nice simple way to do it.

The choice of which timer function to use is up to you. If 1-second resolution is sufficient, then you might as well use stdlib's time() function, and have your array as an array of 32-bit ints.

If you need finer resolution, then you might want to use one of the native PSP API functions, from psprtc.h.

[ghostENVY]

im not a programmer yet but i dont like seing the lazyness of people ...thats why i started to program in c+ even though i dont have any experince its very easy

[MikePiP]

Whats C+??

[soccerPMN]

Originally Posted by Fanjita

Oh come on, you were far worse when you first started coding. This forum is here for us to help each other.

To answer the original poster's question: I can't remember seeing any specific timer functions in the PSP API, nor do I remember any in stdlib.

However, you can easily do what you want by keeping an array of times. To start a timer, just read the current time into a slot in the array. To get how long the timer has been running, get the current time and subtract the value from the array slot. So long as you don't want to receive an event when the timer reaches a certain value, this is a nice simple way to do it.

The choice of which timer function to use is up to you. If 1-second resolution is sufficient, then you might as well use stdlib's time() function, and have your array as an array of 32-bit ints.

If you need finer resolution, then you might want to use one of the native PSP API functions, from psprtc.h.

I was thinking about a timer myself, and I was planning on doing some sort of loop, and just have sceKernelDelayThread(what ever value for the interval's time) then add to a value. Would that work?

[Samstag]

Originally Posted by soccerPMN

I was thinking about a timer myself, and I was planning on doing some sort of loop, and just have sceKernelDelayThread(what ever value for the interval's time) then add to a value. Would that work?

It'll work but it's not accurate. If you want something to happen at a certain time interval, use sceKernelLibcClock() to get the number of microseconds the program has been running.

// wait for 5 seconds to pass while doing other things
clock_t start_time = sceKernelLibcClock();

while(sceKernelLibcClock() - start_time < 5000000)
{
        // do other chores
        sceKernelDelayThread(10000);  // wait 10 milliseconds (optional)
}

[soccerPMN]

Erm, well, I just want to have something to be able to countdown any number of hours and minutes, and display the remaining time. But from looking at your code, if my desired interval was one second, I would just put that where 5000000 is right now, in microseconds?

[Samstag]

Originally Posted by soccerPMN

Erm, well, I just want to have something to be able to countdown any number of hours and minutes, and display the remaining time. But from looking at your code, if my desired interval was one second, I would just put that where 5000000 is right now, in microseconds?

Right. If you want to wait 1 second, you would use 1,000,000. If you want something to happen at a certain time of day you can use sceKernelLibcGettimeofday () but otherwise you'll have to keep track of the countdown yourself.

[Soulphalanx]

Originally Posted by Samstag

It'll work but it's not accurate. If you want something to happen at a certain time interval, use sceKernelLibcClock() to get the number of microseconds the program has been running.

// wait for 5 seconds to pass while doing other things
clock_t start_time = sceKernelLibcClock();

while(sceKernelLibcClock() - start_time < 5000000)
{
        // do other chores
        sceKernelDelayThread(10000);  // wait 10 milliseconds (optional)
}

thanks samstag, this is exactly what im looking for

@SG57
i have searched on google and looked at the pspsdk documentation, but couldnt find any timer functions, so thats why i asked

[nathan42100]

int timer;
float timer2;

while(1) do{
timer++;
timer2 = timer/1000;
printf("The timer is currently at %f milliseconds",timer2);
pspDebugScreenClear;
}

I think that would work, not sure about the function stuff, also needs some includes and defines.

[Nutterbutter]

Originally Posted by nathan42100

int timer;
float timer2;

while(1) do{
timer++;
timer2 = timer/1000;
printf("The timer is currently at %f milliseconds",timer2);
pspDebugScreenClear;
}

I think that would work, not sure about the function stuff, also needs some includes and defines.

Looks very inacurate.

[ttotto]

personally I used this in my C code:

int timer =time(NULL);
int count = 0;

void main(){
while (1){

 int count = (( timer - time (NULL))* -1);
}
return 0;
}

the time i held in the variable count.