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Arduino_fixpt

Fixed point (16.16 & 8.8) library for Arduino to replace resource hungry float/double. Implementation based on libfixmath (https://code.google.com/p/libfixmath). See also http://en.wikipedia.org/wiki/Libfixmath.

Works on AVR (Uno, etc) and ARM (Due, etc) based Arduinos.

PS: The examples may not compile, only Fix16_benchmark was tested and fixed from the original repository.

Benchmarks (Fix16_benchmark.ino example)

Arduino Due fix16_t vs double Benchmark (time in micro seconds):
Op      double	  fixpt	    speed improvement fixpt over double
Mult    372545	  97631	    381.58%
Div     1335860   203392	656.79%
Add     457899	  14830	    3087.65%
Sub     456773	  37275	    1225.41%
Sqrt    14453     2842	    508.55%

Arduino Due fix16_t vs float Benchmark (time in micro seconds):
Op      float	    fixpt	speed improvement fixpt over float
Mult    304898	  103902	293.45%
Div     640075	  206859	309.43%
Add     356009	  22301	    1596.38%
Sub     361209	  39842	    906.60%
Sqrt    14750	    2662	 554.09%

Released under MIT License.

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