From: James Burkart <james@burkartstudios.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Mon, 20 Jul 2020 04:35:15 -0700
Subject: Re: [PIC] MPLAB-X won't set PWM frequency above 25Hz
Thread-Topic: [PIC] MPLAB-X won't set PWM frequency above 25Hz
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Sorry, yes, MCC. I'm pretty sure I have a DIP package 16F1503 somewhere, so
hopefully this afternoon I can dig it out and see what I can find out. But
I've never experienced this before in MCC.

--
James B

On Mon, Jul 20, 2020, 3:40 AM Forrest Christian (List Account) <
lists@packetflux.com> wrote:

> I'm curious where you're seeing these values, Is this in MCC or something
> like that?
>
> So, here are random thoughts:
>
> Is the processor really running at 16Mhz?   Blinking a led with a delay
> loop is a good way to verify this.
>
> If you're running at 16Mhz, it seems like if you set the timer prescale t=
o
> 1, and then set a PR2 value of 0xff you'd get where you want to be.
>
> That is 16Mhz/4 =3D 4Mhz(Fosc/4) / 1 =3D 4Mhz / 256=3D 15.625kHz
>
> On Sun, Jul 19, 2020 at 10:06 PM James Burkart <james@burkartstudios.com>
> wrote:
>
> > I'm using MPLAB-X v5.35, and XC-8 v2.20.
> >
> > Using PIC16F1503. Brand new stand alone project. Set internal frequency
> to
> > 16MHz. TMR2 period set to 250ns. PWM frequency shows 25Hz. Nothing I do
> is
> > setting the PWM frequency correctly. What am I missing here? I'll have =
to
> > dig out my stuff to breadboard it and see what the actual PWM frequency
> is,
> > but this is frustrating.
> >
> > I'd like to set the timer period to 64 us and get a PWM frequency of
> 15.625
> > kHz.
> > --
> > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> > View/change your membership options at
> > http://mailman.mit.edu/mailman/listinfo/piclist
> >
>
>
> --
> - Forrest
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
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