50 lines
1.2 KiB
Arduino
50 lines
1.2 KiB
Arduino
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#include "AudioTools.h"
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#include "AudioTools/FFT/AudioRealFFT.h" // using RealFFT
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#include "AudioTools/AudioLibs/AudioBoardStream.h"
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AudioInfo info(8000, 1, 16);
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AudioRealFFT afft; // or AudioKissFFT
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Hann hann;
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BufferedWindow buffered(&hann);
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SineGenerator<int16_t> sineWave(32000);
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GeneratedSoundStream<int16_t> in(sineWave);
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StreamCopy copier(afft, in);
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//CsvOutput<int16_t> out(Serial);
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//I2SStream out;
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AudioBoardStream out(AudioKitEs8388V1);
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StreamCopy copierIFFT(out, afft);
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// process fft result
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void fftResult(AudioFFTBase &fft) {
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// copy ifft result to output
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while (copierIFFT.copy());
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}
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void setup() {
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
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// set the frequency
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sineWave.setFrequency(N_B4);
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// Setup sine wave
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auto cfg = in.defaultConfig();
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cfg.copyFrom(info);
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in.begin(cfg);
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// Setup FFT
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auto tcfg = afft.defaultConfig(RXTX_MODE);
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tcfg.copyFrom(info);
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tcfg.length = 1024;
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//tcfg.window_function = &buffered;
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//tcfg.stride = 512;
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tcfg.callback = fftResult;
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afft.begin(tcfg);
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// setup output
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auto ocfg = out.defaultConfig(TX_MODE);
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ocfg.copyFrom(info);
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out.begin(ocfg);
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}
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void loop() { copier.copy(); }
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