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Ln(x) approximation routines? - 9S12X

Question asked by Chris Tullar on Aug 13, 2009
Latest reply on Aug 18, 2009 by Chris Tullar

I am trying to calculate dewpoint in a 9S12X processor, and need a way to approximate the natural log function.  I have used a simple polynomial approximation, -x - x^2/2 - x^3/3..., but it breaks down below a certain relative humidity. 

 

Does anyone know of any methods or routines, preferrable in assembly?

 

Thanks,

Chris

 

 

Added p/n to subject.

Message Edited by NLFSJ on 2009-08-18 10:07 AM

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