On Tue, 26 Nov 2002, Soon Lee wrote:

> Hi every one
>
> Do any one have any experience in use sine and cos maths function on
> PIC. like the one stated in the microchip AN660 document(using minimax
> approximations). Can any one kindly enlighten me what method they use
> cos I am current running short of memory and I need to replace their
> fixed point multiplication routine with my standard multiplication
> routine. I am not able to understand the flow of the program is there
> any material that I can read on?

For the theory:

http://www.dattalo.com/technical/theory/sinewave.html

For the practice:

http://www.brouhaha.com/~eric/pic/sine.html
http://www.dattalo.com/technical/software/pic/picsine.html
http://www.dattalo.com/technical/software/pic/sine18.asm

These three links cover the 12, 14, and 16-bit cores.

Scott

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