> > C30 produces pretty good assembly code. A simple FIR filter shouldn't
> > have to be more complicated than rolling the x history and doing the
> > MAC operations in standard C statements. If you need intense
> > optimization to get it done efficiently then I would have to argue
> > that you really need the dsPIC. The PIC24 running full speed should be
> > able to do a LOT of FIR MACs per second, all without any special DSP
> > instructions.
> >
> > I have derived and written FIR and IIR code if you need professional
> > level help.
>=20
> I know I *can* do it- I was just hoping someone had already done it, test=
ed it, and
> shared the code. A dsPIC is definitely a better choice, but sometimes you=
 just have
> to play the cards you're dealt... the data I want to filter is pretty slo=
w- only
> coming in at about 8Hz, and I think I'll put the corner of the low-pass <=
=3D 1Hz.
> Eventually, it will need to be optimized for low power (low cycle count),=
 but I'm
> really trying to do a proof of concept now. This PIC24 is doing plenty of=
 other
> stuff, I'm trying to wedge some additional functionality in there.

Look in the libraries available for the PIC32, IIRC there are IIR and FIR f=
ilters there, and should have source code.
--=20
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--=20
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