12f629 freq divider?

[Kamikaze47]

Using the method I suggested, you could easily change the frequency by changing the number that you subtract from the timer.

[nomad]

ok, guess i was looking for the easy way out. am a newbie and haven't dealt with the timers yet. just assumed it would be difficult to change on the fly. having it all done in the one pic would be best. i'll read up and let you know how it turns out. thanks!

[Darrel Taylor]

the easy way out ...

Slow speed Software PWM
http://www.pbpgroup.com/modules/wfse...hp?articleid=6

Set the dutycycle to 50%
Then change the frequency at will.
<br>

[nomad]

Thanks! now to go read and understand it. Really appreciate the replies.

[talat]

the easy way out ...
Slow speed Software PWM
http://www.pbpgroup.com/modules/wfse...hp?articleid=6

Set the dutycycle to 50%
Then change the frequency at will.
<br>

Hi,
how I can use SSPWM (Slow Speed PWM) code with 12F675?

[skimask]

Hi,
how I can use SSPWM (Slow Speed PWM) code with 12F675?

You can't.
Not enough on chip register space for the variables required.

[Darrel Taylor]

Where do you come up with your answers skimask?

8-Ball?
Dart board?

Of course you can run it on a 12F675.
Just comment out the wsave1 wsave2 and wsave3 variables, since the 12F675 doesn't have GP RAM in those banks.
<br>

[skimask]

Where do you come up with your answers skimask?
8-Ball?
Dart board?
Of course you can run it on a 12F675.
Just comment out the wsave1 wsave2 and wsave3 variables, since the 12F675 doesn't have GP RAM in those banks.
<br>

Both of them...I assign points to each answer, then take the average point out of 7 tries.
Fine, it can be run on a 12F675. I thought there was only 24 bytes ram on a '675.
The average Joe isn't going to know to comment out those wsave variables until the compiler/assembler whines about it. Then the average Joe isn't going to know what 'Unable to fit variable wsave3' means after hitting F9. Then what is the average Joe going to do? Ask questions of course. A comment in the sspwm.inc file would fix that.
I haven't tried it on anything less than a 16F628A. I'll play with it this weekend on an 'F629 and see what happens.