arduinofft: Move to submodule, define srqt_internal externally

1 files changed, 0 insertions, 129 deletions

diff --git a/src/libs/arduinoFFT-develop/Examples/FFT_speedup/FFT_speedup.ino b/src/libs/arduinoFFT-develop/Examples/FFT_speedup/FFT_speedup.ino
deleted file mode 100644
index a059a170..00000000
--- a/src/libs/arduinoFFT-develop/Examples/FFT_speedup/FFT_speedup.ino
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
-
-	Example of use of the FFT libray to compute FFT for a signal sampled through the ADC
-    with speedup through different arduinoFFT options. Based on examples/FFT_03/FFT_03.ino
-  
-    Copyright (C) 2020 Bim Overbohm (header-only, template, speed improvements)
-
-	This program is free software: you can redistribute it and/or modify
-	it under the terms of the GNU General Public License as published by
-	the Free Software Foundation, either version 3 of the License, or
-	(at your option) any later version.
-
-	This program is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU General Public License for more details.
-
-	You should have received a copy of the GNU General Public License
-	along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-*/
-
-// There are two speedup options for some of the FFT code:
-
-// Define this to use reciprocal multiplication for division and some more speedups that might decrease precision
-//#define FFT_SPEED_OVER_PRECISION
-
-// Define this to use a low-precision square root approximation instead of the regular sqrt() call
-// This might only work for specific use cases, but is significantly faster. Only works for ArduinoFFT<float>.
-//#define FFT_SQRT_APPROXIMATION
-
-#include "arduinoFFT.h"
-
-/*
-These values can be changed in order to evaluate the functions
-*/
-#define CHANNEL A0
-const uint16_t samples = 64; //This value MUST ALWAYS be a power of 2
-const float samplingFrequency = 100; //Hz, must be less than 10000 due to ADC
-unsigned int sampling_period_us;
-unsigned long microseconds;
-
-/*
-These are the input and output vectors
-Input vectors receive computed results from FFT
-*/
-float vReal[samples];
-float vImag[samples];
-
-/*
-Allocate space for FFT window weighing factors, so they are calculated only the first time windowing() is called.
-If you don't do this, a lot of calculations are necessary, depending on the window function.
-*/
-float weighingFactors[samples];
-
-/* Create FFT object with weighing factor storage */
-ArduinoFFT<float> FFT = ArduinoFFT<float>(vReal, vImag, samples, samplingFrequency, weighingFactors);
-
-#define SCL_INDEX 0x00
-#define SCL_TIME 0x01
-#define SCL_FREQUENCY 0x02
-#define SCL_PLOT 0x03
-
-void setup()
-{
-  sampling_period_us = round(1000000*(1.0/samplingFrequency));
-  Serial.begin(115200);
-  Serial.println("Ready");
-}
-
-void loop()
-{
-  /*SAMPLING*/
-  microseconds = micros();
-  for(int i=0; i<samples; i++)
-  {
-      vReal[i] = analogRead(CHANNEL);
-      vImag[i] = 0;
-      while(micros() - microseconds < sampling_period_us){
-        //empty loop
-      }
-      microseconds += sampling_period_us;
-  }
-  /* Print the results of the sampling according to time */
-  Serial.println("Data:");
-  PrintVector(vReal, samples, SCL_TIME);
-  FFT.windowing(FFTWindow::Hamming, FFTDirection::Forward);	/* Weigh data */
-  Serial.println("Weighed data:");
-  PrintVector(vReal, samples, SCL_TIME);
-  FFT.compute(FFTDirection::Forward); /* Compute FFT */
-  Serial.println("Computed Real values:");
-  PrintVector(vReal, samples, SCL_INDEX);
-  Serial.println("Computed Imaginary values:");
-  PrintVector(vImag, samples, SCL_INDEX);
-  FFT.complexToMagnitude(); /* Compute magnitudes */
-  Serial.println("Computed magnitudes:");
-  PrintVector(vReal, (samples >> 1), SCL_FREQUENCY);
-  float x = FFT.majorPeak();
-  Serial.println(x, 6); //Print out what frequency is the most dominant.
-  while(1); /* Run Once */
-  // delay(2000); /* Repeat after delay */
-}
-
-void PrintVector(float *vData, uint16_t bufferSize, uint8_t scaleType)
-{
-  for (uint16_t i = 0; i < bufferSize; i++)
-  {
-    float abscissa;
-    /* Print abscissa value */
-    switch (scaleType)
-    {
-      case SCL_INDEX:
-        abscissa = (i * 1.0);
-	break;
-      case SCL_TIME:
-        abscissa = ((i * 1.0) / samplingFrequency);
-	break;
-      case SCL_FREQUENCY:
-        abscissa = ((i * 1.0 * samplingFrequency) / samples);
-	break;
-    }
-    Serial.print(abscissa, 6);
-    if(scaleType==SCL_FREQUENCY)
-      Serial.print("Hz");
-    Serial.print(" ");
-    Serial.println(vData[i], 4);
-  }
-  Serial.println();
-}