Any algorithms to multiplex ccp to generate 4 square waves?

[future]

hello everybody,

I am timing 2 square waves with a fast timer2 interrupt, but adding more outputs will slow the code a lot.

I am wondering about how to generate 4 similar waves (duty cycle can change) and sync them with a main wave. This sync can be out of phase from 0 to 90 degrees. The hardest part would be this syncing I think.

Previous researches resulted to linked lists and binary trees but I could not see how to make it work.

So I ask how would you solve it?

Thank you.

[jma_1]

Greetings,

Perhaps a PLL is the way to go. Here is a chip offered by National Semi that might put you in the right direction (2 channel?).

http://www.national.com/pf/LM/LMX2331L.html

[SherpaDoug]

Try googling "numerically controlled oscillator". That is a powerful technique but a PIC can only do it at audio frequencies. I have a PIC16C54 generating up to 32kHz.
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[future]

Yes I need it for 350hz maximum with a resolution of 1/4hz.

The 2Ghz PLL seems to be too much for the job

I'll look for the NCO theory, thank you.