MicroChips version of millis();

Hello.
 
Im searching for Microchips C18s version of the Arduino function called millis();
Its a function that is called if you need the duration that the MCU was ON and it overflows at 50 days.
It also returns the time in milli seconds.
If it does have one how long can the microchips be on until it overflows?
Now im cant seem to find it on the internet cause I dont really know what to look for.
 
Mostly ill come up to something like timer.h lib etc and I dont know if it is what im looking for.

Hmm..ok I will do so.
 
But could you please push me in the right direction of doing so maybe, with say functions I should use to stamp time in C18 lib
and ways to make really big varieables that will be fast to recalculate into milliseconds so I can use this with good/fast precision in my code?
 
Thanks allot :)

Ok but wont an interrupt every 1ms hamper the overall performance of the MCU?
Will I be using the "timer.h" include and  what will I base the first millisecond on...like
 
[CODE] unsigned long = Function(); //which functions will that be? [/CODE]
 
Also I want to avoid using Delays in total. Dont want a single delay in my code.
To be more precise about the millisecond issue. I want to code without the use of delays and can only do some with some sort of really precise millisecond tracker.
 
 

Yep
a few uSecs out of 1mSec will be, say, less than 0.2% on average and a bit more when seconds, minutes etc are to be bumped, which will happen *very* seldom in CPU terms.
 
As for the delay, am not sure what you mean. But, just like in Windows, you can have local delays/timers by reading the current milliseconds counter and storing to a local static var, and then performing comparations over it.

Ok since MCs forum kept on massacring my message ill just paste it again.
 
Ok cool I understand.
I am willing to write my own wrapper for this.
 
On the Pic 18F4550 what would the interrupt code look like if I want to interrupt it every 10 ms ?
I read the timer.h lib and it seems i can use  this method.
 
[<font][<font]unsigned long initialTime=0;
[<font][<font]  OpenTimer0(TIMER_INT_OFF & T0_SOURCE_INT & T0_PS_1_32);
 
[<font][<font]if (ReadTimer0() - InitialTime >= 10)
[<font][<font]{
[<font][<font] DoInterrupt();
[<font][<font]InitialTime = ReadTimer0(); 
[<font][<font]}
 
[<font] Please do keep in mind that I have NEVER worked with the pic18F4550s interrupt and will be really happy if you could show me :) 
 
[<font] Thanks