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Accessing IQMATH tables

Paolo Benini
Intellectual 485 points
Other Parts Discussed in Thread: TMS320F28335

Hi everybody,

I'm using TMS320F28335 and IQMATH library and noticed that "IQNatan2PU" function takes 117 cycles to execute.

I need to be really fast and thought of accessing atan look-up table directly, maybe with a linear interpolation between points.

First question: is there any other document other than the attached one, explaining which type of table is that and which type of interpolation is adopted (linear, Taylor expansion, regression curve...)?

Second question: may I access those tables directly or should I create my own ones? I coudn't see any definition in IQMath library header file...

Many thanks for the support.

Paolo

IQMath.pdf