loop()

void loop

(

)

Definition at line 90 of file PJRCSpectrumAnalyzer.ino.

            {
  unsigned int x, y, freqBin;
  float level;
 
  if (fft.available()) {
    // freqBin counts which FFT frequency data has been used,
    // starting at low frequency
    freqBin = 0;
 
    for (x=0; x < matrix_width; x++) {
      // get the volume for each horizontal pixel position
      level = fft.read(freqBin, freqBin + frequencyBinsHorizontal[x] - 1);
 
      // uncomment to see the spectrum in Arduino's Serial Monitor
      // Serial.print(level);
      // Serial.print("  ");
 
      for (y=0; y < matrix_height; y++) {
        // for each vertical pixel, check if above the threshold
        // and turn the LED on or off
        if (level >= thresholdVertical[y]) {
          leds[xy(x,y)] = CRGB(myColor);
        } else {
          leds[xy(x,y)] = CRGB::Black;
        }
      }
      // increment the frequency bin count, so we display
      // low to higher frequency from left to right
      freqBin = freqBin + frequencyBinsHorizontal[x];
    }
    // after all pixels set, show them all at the same instant
    FastLED.show();
    // Serial.println();
  }
}

References CRGB::Black, FastLED, fft, frequencyBinsHorizontal, leds, matrix_height, matrix_width, myColor, thresholdVertical, x, xy(), and y.

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