Generating slow PWMs

Charlie · Guest

Programming a PIC16C773 with an 8MHz Xtal:

I can create frequencies using the built-in PWM from 100KHz to 500Hz with no problem. Problem comes when I need frequecies below this. I need to produce frequecies down to 1Hz. Specifically, I need 1, 10, 50 and 100Hz.

I could enable Timer2 to interrupt every 2ms, count interrupts and toggle the output pin manually. But this seems messy. Any ideas on a cleaner solution? Thanks!

Charlie
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This message was ported from CCS's old forum
Original Post ID: 13164

Kenny · Joined: 07 Sep 2003 Posts: 173 Location: Australia

:=Programming a PIC16C773 with an 8MHz Xtal:
:=
:=I can create frequencies using the built-in PWM from 100KHz to 500Hz with no problem. Problem comes when I need frequecies below this. I need to produce frequecies down to 1Hz. Specifically, I need 1, 10, 50 and 100Hz.
:=
:=I could enable Timer2 to interrupt every 2ms, count interrupts and toggle the output pin manually. But this seems messy. Any ideas on a cleaner solution? Thanks!
:=
:=Charlie

Mr. Hamlett covered it very well in a recent post:
<a href="http://www.pic-c.com/forum/general/posts/12884.html" TARGET="_blank">http://www.pic-c.com/forum/general/posts/12884.html</a>
Regards
Kenny
___________________________
This message was ported from CCS's old forum
Original Post ID: 13167