[oopic] Re: Providing a clock/time to the PIC

--- In oopic@yahoogroups.com, Ian Drennan <ianid@...> wrote:
>
> minghui1984 wrote:
> > Hi guys, i got a question. As i am dealing with solar tracking
> > device, i would like to be able to feedback the time to the PIC.
i
> > look through the object list and found several options that i
could
> > use. Thought i just ask if there is any shorter way of doing it.
> >
> > What i need:
> > Implementing a "clock" by using counters, using the execution
cycle
> > and frequency of the PIC (in this case ooPIC is 20MHz). I would
> >
> > counter_sec++;
> > if counter_sec == 60
> > {
> > counter_min++;
> > counter_sec = 0; 'resetting it back to 0
> > }
> > if counter_min == 60
> > {
> > counter_hrs++;
> > counter_min = 0; 'resetting it back to 0
> > }
> >
> > if counter_hrs == 24
> > {
> > day++;
> > counter_hrs =0; 'resetting it back to 0
> > }
> >
> > Loop
> >
> > My question is will this code work?
> > how do i make this function keep on running outside the main
function
> > Is this a good way of "telling" the time? Cos my device is a
> > standalone kind so no PC/Laptops will be connected once its
configured
> >
> > In the object list, there are oTimer, oCounter, oClock, are these
> > suited for the purpose? I looked thru the example, but i dun
quite
> > get it. >.<
> >
> > Anyone got any hints to how i might make this thing work?
> >
> >
> I would think the oRTC object would be best suited for your
purpose. It
> is an object that maintains a real-time clock. It's been a few
years
> since I last played with this object but I do remember that it was
> accurate to about 2 sec in a 24 hour period.
> Also it will lose its current state when power to the oopic is
interrupted.
>
> Good luck
>
> Ian
>

Thanks Ian, i will look into that. What if my power is not continous?
anyone else got any other ideas?

One more question. I saw on the archive message that its not possible
to implement inverse trigo functions, but is there any way i could
solve inverse functions?

THanks once again
Minghui

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