Creating the pulses you want is made very easy using the Output Compare mod=
ules in the more recent processors.

I did a pulse generation system in a PIC24 where we needed three periodic p=
ulses with known delays between them. Using three Output Compare modules sy=
nchronised to the same reset pulse and clocked together made it real easy. =
You could do a similar thing using two modules, one to generate the one sec=
ond wide pulse, and the second to generate a one clock wide pulse for the s=
trobe signal you want, which could be delayed from the one second pulse by =
one clock pulse.



> -----Original Message-----
> From: Richard R. Pope [mailto:mechanic_2@charter.net]
> Sent: 18 July 2014 09:20
> To: Microcontroller discussion list - Public.
> Subject: Re: [Pic] Making a special timer!
>=20
> Hello,
>      I'm replying to myself because it is the part about controlling the =
one
> second pulse that I just don't know how to do. Do I use a timer or do I s=
etup
> a set of delay loops. The more accurate the one second pulse the more
> accurate that the frequency being displayed is going to be. A 4MHz clock
> means that 1 megacycles are executed in one second. So, you do the
> initialization, open the gate for one second, read the pot, wait for a ti=
me
> that corresponds to the pot setting, send out the reset pulse, open the g=
ate
> for one second, and repeat these steps forever.
> Correct?
> Thanks,
> rich!
> P.S. This looks like an outline for the program. Correct?
> rich!
>=20
> On 7/18/2014 3:03 AM, Richard R. Pope wrote:
> > Joe,
> >       That is true. Setup a clock the can output a high for one second
> > on demand. Read the POT, output the reset pulse, turn on the one
> > second clock that corresponds to the setting of the POT, and do it all
> > over again. Is that correct?
> > Thanks,
> > rich!
> >
> > On 7/18/2014 2:56 AM, IVP wrote:
> >>> I could figure out MPASM but MP C would be much easier
> >> It should be simple enough in asm
> >>
> >> So far there are only a few basic functions - get the clock going,
> >> read the pot and do something with the result
> >>
> >> It's not as though the PIC needs to do a lot of calculations for
> >> example, it's just reacting and supervising
> >>
> >> Joe
>=20
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
--=20
Scanned by iCritical.

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.