You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.9 KiB
68 lines
1.9 KiB
|
|
// TestFFT1024iq.ino for Teensy 3.x, 4.x
|
|
// Bob Larkin 3 March 2021// Rev to include xAxis control. 6 Mar 2021
|
|
|
|
// Generate Sin and Cosine pair and input to IQ FFT.
|
|
// Serial Print out powers of all 1024 bins in
|
|
// dB relative to Sine Wave Full Scale
|
|
|
|
// Public Domain
|
|
|
|
#include "OpenAudio_ArduinoLibrary.h"
|
|
#include "AudioStream_F32.h"
|
|
|
|
// GUItool: begin automatically generated code
|
|
AudioSynthSineCosine_F32 sine_cos1; //xy=76,532
|
|
AudioAnalyzeFFT1024_IQ_F32 FFT1024iq1; //xy=243,532
|
|
AudioOutputI2S_F32 audioOutI2S1; //xy=246,591
|
|
AudioConnection_F32 patchCord1(sine_cos1, 0, FFT1024iq1, 0);
|
|
AudioConnection_F32 patchCord2(sine_cos1, 1, FFT1024iq1, 1);
|
|
// GUItool: end automatically generated code
|
|
|
|
void setup(void) {
|
|
float* pPwr;
|
|
|
|
Serial.begin(9600);
|
|
delay(1000);
|
|
AudioMemory_F32(50);
|
|
Serial.println("FFT1024IQ Test");
|
|
|
|
sine_cos1.amplitude(1.0f); // Initialize Waveform Generator
|
|
|
|
// Pick T3.6 bin center
|
|
//sine_cos1.frequency(689.33);
|
|
|
|
// or pick T4.x bin center
|
|
sine_cos1.frequency(689.0625f);
|
|
|
|
// or pick any old frequency
|
|
//sine_cos1.frequency(7100.0);
|
|
|
|
// elect the output format
|
|
FFT1024iq1.setOutputType(FFT_DBFS);
|
|
|
|
// Select the wndow function
|
|
//FFT1024iq1.windowFunction(AudioWindowNone);
|
|
//FFT1024iq1.windowFunction(AudioWindowHanning1024);
|
|
//FFT1024iq1.windowFunction(AudioWindowKaiser1024, 55.0f);
|
|
FFT1024iq1.windowFunction(AudioWindowBlackmanHarris1024);
|
|
|
|
// Uncomment to Serial print window function
|
|
//float* pw = FFT1024iq1.getWindow(); // Print window
|
|
//for (int i=0; i<512; i++) Serial.println(pw[i], 4);
|
|
|
|
// xAxis, bit 0 left/right; bit 1 low to high; default 0X03
|
|
FFT1024iq1.setXAxis(0X03);
|
|
|
|
delay(1000);
|
|
// Print output, once
|
|
if( FFT1024iq1.available() ) {
|
|
pPwr = FFT1024iq1.getData();
|
|
for(int i=0; i<1024; i++)
|
|
Serial.println(*(pPwr + i), 8 );
|
|
}
|
|
Serial.println("");
|
|
}
|
|
|
|
void loop(void) {
|
|
}
|
|
|