2014-07-20 00:55:27 +00:00
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arduinoFFT
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==========
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Fast Fourier Transform for Arduino
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2014-07-20 01:01:14 +00:00
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This is a fork from https://code.google.com/p/makefurt/ which has been abandoned since 2011.
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2014-07-20 01:08:55 +00:00
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2014-11-09 08:03:01 +00:00
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<del>This is a C++ library for Arduino for computing FFT.</del> Now it works both on Arduino and C projects.
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2014-07-20 03:42:36 +00:00
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2017-04-25 20:26:25 +00:00
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Tested on Arduino 1.6.11
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2014-07-20 01:08:55 +00:00
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2017-04-25 20:26:25 +00:00
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### Installation on Arduino
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2014-07-20 01:08:55 +00:00
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2014-07-20 03:42:36 +00:00
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To install this library, just place this entire folder as a subfolder in your Arduino installation
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2014-07-20 01:08:55 +00:00
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When installed, this library should look like:
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2014-07-20 03:42:36 +00:00
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Arduino\libraries\arduinoFTT (this library's folder)
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Arduino\libraries\arduinoFTT\arduinoFTT.cpp (the library implementation file, uses 32 bits floats vectors)
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2017-04-25 20:26:25 +00:00
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Arduino\libraries\arduinoFTT\arduinoFTT.h (the library header file, uses 32 bits floats vectors)
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2014-07-20 03:42:36 +00:00
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Arduino\libraries\arduinoFTT\keywords.txt (the syntax coloring file)
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Arduino\libraries\arduinoFTT\examples (the examples in the "open" menu)
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Arduino\libraries\arduinoFTT\readme.md (this file)
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2014-07-20 01:08:55 +00:00
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2017-04-25 20:26:25 +00:00
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### Building on Arduino
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2014-07-20 01:08:55 +00:00
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After this library is installed, you just have to start the Arduino application.
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You may see a few warning messages as it's built.
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To use this library in a sketch, go to the Sketch | Import Library menu and
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2014-07-20 03:42:36 +00:00
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select arduinoFTT. This will add a corresponding line to the top of your sketch:
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2014-07-30 14:41:55 +00:00
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`#include <arduinoFTT.h>`
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2014-11-09 08:03:01 +00:00
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2017-04-25 20:26:25 +00:00
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### TODO
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* Ratio table for windowing function.
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* Document windowing functions advantages and disadvantages.
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* Optimize usage and arguments.
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* Add new windowing functions.
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2017-08-08 01:25:10 +00:00
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* Spectrum table?
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2017-04-26 13:46:41 +00:00
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### API
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* **arduinoFFT**(void);
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Constructor
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* **~arduinoFFT**(void);
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Destructor
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* **ComplexToMagnitude**(double *vReal, double *vImag, uint16_t samples);
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* **Compute**(double *vReal, double *vImag, uint16_t samples, uint8_t dir);
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Calculates the power value according to **Exponent** and calcuates the Fast Fourier Transform.
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* **Compute**(double *vReal, double *vImag, uint16_t samples, uint8_t power, uint8_t dir);
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Calcuates the Fast Fourier Transform.
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* **MajorPeak**(double *vD, uint16_t samples, double samplingFrequency);
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* **Revision**(void);
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Returns the library revision.
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* **Windowing**(double *vData, uint16_t samples, uint8_t windowType, uint8_t dir);
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Performs a windowing function on the values array. The possible windowing options are:
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* FFT_WIN_TYP_RECTANGLE
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* FFT_WIN_TYP_HAMMING
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* FFT_WIN_TYP_HANN
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* FFT_WIN_TYP_TRIANGLE
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* FFT_WIN_TYP_BLACKMAN
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* FFT_WIN_TYP_FLT_TOP
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* FFT_WIN_TYP_WELCH
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* **Exponent**(uint16_t value);
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Calculates and returns the base 2 logarithm of the given value.
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