faster trig functions (namely atan or atan2)

Mauvai · 2015-02-03 05:25

I have an atan2 trig function which is taking about 8ms to run - is this normal? It seems incredibly slow.

Is there a faster way to do this - can I access the lookup tables somehow?

Bean · 2015-02-03 05:31

That does sound really slow. Can you post your code ?
I would look into using CORDIC. http://forums.parallax.com/showthread.php/127241

Bean

Mauvai · 2015-02-03 05:38

Code attached. the slow trig is in dof_class.cpp, the read_accel() function. Thanks for the suggestion, will look into it

dof_class.h dof_class.cpp Full_AHRS.cpp

While we're at it, any idea to output a struct from the dof_class.output_variables function and assign it into a volatile version of the struct it outputs?

faster trig functions (namely atan or atan2)

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