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78 lines
2.2 KiB
78 lines
2.2 KiB
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// TestFFT256iq.ino
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#include "OpenAudio_ArduinoLibrary.h"
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#include "AudioStream_F32.h"
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#include <Audio.h>
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#include <Wire.h>
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#include <SPI.h>
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#include <SD.h>
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#include <SerialFlash.h>
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// GUItool: begin automatically generated code
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AudioSynthSineCosine_F32 sine_cos1; //xy=76,532
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AudioAnalyzeFFT256_IQ_F32 FFT256iq1; //xy=243,532
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AudioOutputI2S_F32 audioOutI2S1; //xy=246,591
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AudioConnection_F32 patchCord1(sine_cos1, 0, FFT256iq1, 0);
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AudioConnection_F32 patchCord2(sine_cos1, 1, FFT256iq1, 1);
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// GUItool: end automatically generated code
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void setup(void) {
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float* pPwr;
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Serial.begin(9600);
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delay(1000);
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AudioMemory_F32(20);
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Serial.println("FFT256IQ Test v2");
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sine_cos1.amplitude(1.0); // Initialize Waveform Generator
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// bin spacing = 44117.648/256 = 172.335 172.3 * 4 = 689.335 Hz (T3.6)
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// Half bin higher is 775.3 for testing windows
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//sine_cos1.frequency(689.34f);
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// Pick T3.6 bin center
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//sine_cos1.frequency(689.33);
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// or pick T4.x bin center
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//sine_cos1.frequency(689.0625f);
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// or pick any old frequency
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sine_cos1.frequency(7100.0);
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// elect the output format
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FFT256iq1.setOutputType(FFT_DBFS);
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// Select the wndow function
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//FFT256iq1.windowFunction(AudioWindowNone);
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//FFT256iq1.windowFunction(AudioWindowHanning256);
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//FFT256iq1.windowFunction(AudioWindowKaiser256, 55.0f);
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FFT256iq1.windowFunction(AudioWindowBlackmanHarris256);
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// Uncomment to Serial print window function
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//float* pw = FFT256iq1.getWindow(); // Print window
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//for (int i=0; i<512; i++) Serial.println(pw[i], 4);
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// xAxis, bit 0 left/right; bit 1 low to high; default 0X03
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FFT256iq1.setXAxis(0X03);
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FFT256iq1.windowFunction(AudioWindowBlackmanHarris256);
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//float* pw = FFT256iq1.getWindow(); // Print window
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//for (int i=0; i<256; i++) Serial.println(pw[i], 4);
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// Do power averaging (outputs appear less often, as well)
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FFT256iq1.setNAverage(5); // nAverage >= 1
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delay(1000);
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if( FFT256iq1.available() ) {
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pPwr = FFT256iq1.getData();
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for(int i=0; i<256; i++) {
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Serial.print(i);
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Serial.print(",");
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Serial.println(*(pPwr + i), 8 );
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}
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Serial.print("\n\n");
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}
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}
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void loop(void) {
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}
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