PIC16F877A - Timer0 won't interrupt

[WishMaster^]

For those who want to make a Stopwatch, here is my code for it. You will have to tune Timer0 for exact readouts since it is not perfect yet. By 30 seconds it will be 1,5 seconds off (28,5 sec)

It counts from 100 uS

Have fun building your stopwatch

Thanks to all who helped me to make the code as it is now!


Cheers,

William

P.S, I'll keep you all informed about the 3-stopwatch-at-the-same-time-based-on-interrupts-program

[skimask]

For those who want to make a Stopwatch, here is my code for it. You will have to tune Timer0 for exact readouts since it is not perfect yet. By 30 seconds it will be 1,5 seconds off (28,5 sec)
It counts from 100 uS
Have fun building your stopwatch
Thanks to all who helped me to make the code as it is now!
Cheers,
William
P.S, I'll keep you all informed about the 3-stopwatch-at-the-same-time-based-on-interrupts-program

I almost hate to point this out to you since you've already got all this work into your project/code...but...
Do a search on 'Olympic Timer'...
You'll find a timer that Melanie did awhile back, and it's very accurate...well, at least as accuracte as your oscillator is.

[Darrel Taylor]

Right! There's ...

• Olympic Timer (Melanie)
  http://www.picbasic.co.uk/forum/showthread.php?t=632
  &nbsp; &nbsp;Uses ON INTERRUPT<br>
  
• Easy and Accurate Clocks without RTC IC (paul borgmeier)
  http://www.picbasic.co.uk/forum/showthread.php?t=2129
  &nbsp; &nbsp;No Interrupts<br>
  
• Elapsed Timer Demo (Darrel Taylor)
  http://www.picbasic.co.uk/forum/showthread.php?t=190
  &nbsp; &nbsp;ASM Interrupts<br>
  
• Elapsed Timer for Instant Interrupts (Darrel Taylor)
  http://www.picbasic.co.uk/forum/showthread.php?p=17473
  &nbsp; &nbsp;Instant Interrupts<br>
  
• Here's one based on Roman Black's routines (shahidali55)
  http://www.picbasic.co.uk/forum/showthread.php?p=22173
  &nbsp; &nbsp;No Interrupts

And now there's...

• Working code (Stopwatch) (WishMaster^)
  http://www.picbasic.co.uk/forum/showthread.php?p=36939
  &nbsp; &nbsp;ASM Interrupts

Now all we need is ...

• _ _ _ _ _ _ _ _ _ _ _ (skimask)
  http://www.picbasic.co.uk/forum/show...?p=dontknowyet
  &nbsp; &nbsp;???? Interrupts

[skimask]

Right! There's ...
Now all we need is ...

• _ _ _ _ _ _ _ _ _ _ _ (skimask)
  http://www.picbasic.co.uk/forum/show...?p=dontknowyet
  &nbsp; &nbsp;???? Interrupts

Jack of all trades, master of none. I know you've seen me say it before, I'm not doing anything that somebody else has already done...
Maybe someday I'll come up with something really neat and revolutionary to post...but I haven't come up with anything just yet...(that FFT routine adaptation I've got posted on my webpage for the PIC18Fxxxx is under an NDA, otherwise it would be here in a second).

[WishMaster^]

I almost hate to point this out to you since you've already got all this work into your project/code...but...
Do a search on 'Olympic Timer'...
You'll find a timer that Melanie did awhile back, and it's very accurate...well, at least as accuracte as your oscillator is.

Yeah, I saw that one... But I learned much more about assembly and stuff with my own code then by simple copy/paste.

And if I finish the main project, the 3-timers-thing, then I will share the happiness too. Might be handy to clock the top3 formula 1 cars when you are at a race or something :P

Here it will be used for viscositymeasurements (http://en.wikipedia.org/wiki/Viscosity), where we can start a measurement at any time we want and not one per time (time = money and stuff ).

And, most important reason of all, making your own code is so much more fun, seeing it grow and on the end, see it work!


Cheers,

William