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simple friendly wait timer?

Altera_Forum
Honored Contributor I
783 Views

Hello, 

I just want a simple OS friendly wait timer. I want to wait for 20ms and then continue my loop. However, I dont want just write some proccesor intensive loop (which obviously doesnt work in a multitasking enviroment) I just want some OS wait() or sleep() function where you specifey the time in milliseconds, and the application sleeps, returns the proccesor to the OS, and then wakes up to finish what it was doing in 20 milliseconds. 

 

Is there such a function built into C? 

What do I need to include to access this? 

 

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/blink.gif  

 

Thanks.
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2 Replies
Altera_Forum
Honored Contributor I
51 Views

If you&#39;re in a linux environment, the function that you want is usleep(unsigned long usec). Please note, though, that it only sleeps for a minimum of the specified number of milliseconds -- it might sleep longer. Life is much harder if you&#39;re trying to go for guaranteed time intervals.

Altera_Forum
Honored Contributor I
51 Views

In order to use usleep() I needed to include: 

 

# include <unistd.h> 

 

Thanks for all your help should work for what I need.
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