Alan,
     It still sounds like the 628 would be the one to use. It has=20
comparator units in it. For a moment I thought I knew what to do and=20
then I lost it. Hum. Would someone please take the time to sit down and=20
write some C code that would do these things? I know that I am asking a=20
lot but I really need the help with this.
Thanks,
rich!

On 7/18/2014 3:47 AM, alan.b.pearce@stfc.ac.uk wrote:
> Creating the pulses you want is made very easy using the Output Compare m=
odules in the more recent processors.
>
> I did a pulse generation system in a PIC24 where we needed three periodic=
 pulses with known delays between them. Using three Output Compare modules =
synchronised 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 s=
econd wide pulse, and the second to generate a one clock wide pulse for the=
 strobe signal you want, which could be delayed from the one second pulse b=
y 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!
>>
>> Hello,
>>       I'm replying to myself because it is the part about controlling th=
e one
>> second pulse that I just don't know how to do. Do I use a timer or do I =
setup
>> 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 t=
ime
>> that corresponds to the pot setting, send out the reset pulse, open the =
gate
>> for one second, and repeat these steps forever.
>> Correct?
>> Thanks,
>> rich!
>> P.S. This looks like an outline for the program. Correct?
>> rich!
>>
>> 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!
>>>
>>>

--=20
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