Phil wrote:

> I've been to the Microchip site where I found a lot of documents
> that discuss
> floating point maths but no code examples.
>
> Can someone please help?

Hi Phil,

It would appear that fixed-point math is all you really need:

Perhaps you could represent all your numbers in signed 16.8 fixed point
format.
(16 bits for the integer portion of the number and 8 bits for the fractional
portion)

Look up AN617 (Fixed Point Routines) on Microchip's web site.

Best regards,

Ken Pergola

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