#define MATRIX
//#undef MATRIX
#ifdef MATRIX
#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#define PIN 3
Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(32, 8, PIN,
NEO_MATRIX_BOTTOM + NEO_MATRIX_LEFT +
NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG,
NEO_GRB + NEO_KHZ800);
#endif
#include <Audio.h>
///////////////////////////////////
// copy the Design Tool code here
///////////////////////////////////
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>
// GUItool: begin automatically generated code
AudioInputI2S i2s2; //xy=210,60
AudioPlayMemory playMem1; //xy=261,210
AudioSynthWaveform waveform1; //xy=284,269
AudioMixer4 mixer1; //xy=450,196
AudioOutputI2S i2s1; //xy=669,145
AudioAnalyzeFFT1024 fft1024_1; //xy=677,201
AudioConnection patchCord1(i2s2, 0, mixer1, 0);
AudioConnection patchCord2(i2s2, 1, mixer1, 1);
AudioConnection patchCord3(playMem1, 0, mixer1, 2);
AudioConnection patchCord4(waveform1, 0, mixer1, 3);
AudioConnection patchCord5(mixer1, 0, i2s1, 0);
AudioConnection patchCord6(mixer1, 0, i2s1, 1);
AudioConnection patchCord7(mixer1, fft1024_1);
AudioControlSGTL5000 sgtl5000_1; //xy=526,301
// GUItool: end automatically generated code
// Use these with the Teensy Audio Shield
#define SDCARD_CS_PIN 10
#define SDCARD_MOSI_PIN 7
#define SDCARD_SCK_PIN 14
// Use these with the Teensy 3.5 & 3.6 SD card
//#define SDCARD_CS_PIN BUILTIN_SDCARD
//#define SDCARD_MOSI_PIN 11 // not actually used
//#define SDCARD_SCK_PIN 13 // not actually used
// Use these for the SD+Wiz820 or other adaptors
//#define SDCARD_CS_PIN 4
//#define SDCARD_MOSI_PIN 11
//#define SDCARD_SCK_PIN 13
const int myInput = AUDIO_INPUT_LINEIN;
void setup() {
Serial.begin(57600);
#ifdef MATRIX
matrix.begin();
matrix.setBrightness(40);
//matrix.setTextWrap(false);
//matrix.setTextColor(colors[0]);
matrix.fillScreen(0);
matrix.show();
#endif
AudioMemory(12);
sgtl5000_1.enable();
sgtl5000_1.volume(0.5);
// SPI.setMOSI(SDCARD_MOSI_PIN);
// SPI.setSCK(SDCARD_SCK_PIN);
// if (!(SD.begin(SDCARD_CS_PIN))) {
// while (1) {
// Serial.println("Unable to access the SD card");
// delay(500);
// }
// }
// Enable audio in
sgtl5000_1.enable();
sgtl5000_1.inputSelect(myInput);
sgtl5000_1.volume(1);
mixer1.gain(0, 1.0);
mixer1.gain(1, 1.0);
mixer1.gain(2, 0.0);
mixer1.gain(3, 0.0);
// Uncomment one these to try other window functions
// fft1024_1.windowFunction(NULL);
// fft1024_1.windowFunction(AudioWindowBartlett1024);
// fft1024_1.windowFunction(AudioWindowFlattop1024);
//playSdWav1.play("SDTEST2.WAV");
delay(1000);
}
void loop() {
if (fft1024_1.available()) {
// Refer to FFT bin calculator at https://github.com/s-marley/ESP32_FFT_VU
spectrum(0,fft1024_1.read(0,2));
spectrum(1,fft1024_1.read(2,2));
spectrum(2,fft1024_1.read(3,3));
spectrum(3,fft1024_1.read(3,4));
spectrum(4,fft1024_1.read(4,4));
spectrum(5,fft1024_1.read(4,5));
spectrum(6,fft1024_1.read(5,6));
spectrum(7,fft1024_1.read(6,7));
spectrum(8,fft1024_1.read(7,9));
spectrum(9,fft1024_1.read(9,10));
spectrum(10,fft1024_1.read(10,12));
spectrum(11,fft1024_1.read(12,15));
spectrum(12,fft1024_1.read(15,17));
spectrum(13,fft1024_1.read(17,21));
spectrum(14,fft1024_1.read(21,25));
spectrum(15,fft1024_1.read(25,29));
spectrum(16,fft1024_1.read(29,34));
spectrum(17,fft1024_1.read(34,41));
spectrum(18,fft1024_1.read(41,49));
spectrum(19,fft1024_1.read(49,58));
spectrum(20,fft1024_1.read(58,68));
spectrum(21,fft1024_1.read(68,81));
spectrum(22,fft1024_1.read(81,96));
spectrum(23,fft1024_1.read(96,114));
spectrum(24,fft1024_1.read(114,135));
spectrum(25,fft1024_1.read(135,161));
spectrum(26,fft1024_1.read(161,191));
spectrum(27,fft1024_1.read(191,226));
spectrum(28,fft1024_1.read(226,268));
spectrum(29,fft1024_1.read(268,318));
spectrum(30,fft1024_1.read(318,377));
spectrum(31,fft1024_1.read(377,511));
#ifdef MATRIX
matrix.show();
#endif
}
#ifdef MATRIX
matrix.fillScreen(0);
delay(10);
#endif
}
void spectrum(int x, float n) {
uint16_t colors[] = {
matrix.Color(0 ,0, 0),
matrix.Color( 0, 128, 0),
matrix.Color( 0, 192, 0),
matrix.Color( 0, 255, 128),
matrix.Color( 0, 255, 255),
matrix.Color( 0, 0, 255),
matrix.Color( 128, 0, 255),
matrix.Color( 255, 0, 255),
matrix.Color( 255, 0, 0),
};
// x = band
// y = led height
int y = LEDnumber(n);
#ifdef MATRIX
switch ( y ) {
case -1 :
// All off
matrix.drawPixel(x,y, colors[0] );
break;
case 1 :
matrix.drawPixel(x,0, colors[1] );
break;
case 2 :
matrix.drawPixel(x,0, colors[1] );
matrix.drawPixel(x,1, colors[2] );
break;
case 3 :
matrix.drawPixel(x,0, colors[1] );
matrix.drawPixel(x,1, colors[2] );
matrix.drawPixel(x,2, colors[3] );
break;
case 4 :
matrix.drawPixel(x,0, colors[1] );
matrix.drawPixel(x,1, colors[2] );
matrix.drawPixel(x,2, colors[3] );
matrix.drawPixel(x,3, colors[4] );
break;
case 5 :
matrix.drawPixel(x,0, colors[1] );
matrix.drawPixel(x,1, colors[2] );
matrix.drawPixel(x,2, colors[3] );
matrix.drawPixel(x,3, colors[4] );
matrix.drawPixel(x,4, colors[5] );
break;
case 6 :
matrix.drawPixel(x,0, colors[1] );
matrix.drawPixel(x,1, colors[2] );
matrix.drawPixel(x,2, colors[3] );
matrix.drawPixel(x,3, colors[4] );
matrix.drawPixel(x,4, colors[5] );
matrix.drawPixel(x,5, colors[6] );
break;
case 7 :
matrix.drawPixel(x,0, colors[1] );
matrix.drawPixel(x,1, colors[2] );
matrix.drawPixel(x,2, colors[3] );
matrix.drawPixel(x,3, colors[4] );
matrix.drawPixel(x,4, colors[5] );
matrix.drawPixel(x,5, colors[6] );
matrix.drawPixel(x,6, colors[7] );
break;
case 8 :
matrix.drawPixel(x,0, colors[1] );
matrix.drawPixel(x,1, colors[2] );
matrix.drawPixel(x,2, colors[3] );
matrix.drawPixel(x,3, colors[4] );
matrix.drawPixel(x,4, colors[5] );
matrix.drawPixel(x,5, colors[6] );
matrix.drawPixel(x,6, colors[7] );
matrix.drawPixel(x,7, colors[8] );
break;
default:
break;
}
#endif
}
int LEDnumber(float n) {
int led = -1;
if (n > 0.250) {
led = 8;
} else if ( n > 0.220) {
led = 7;
} else if ( n > 0.180) {
led = 6;
} else if ( n > 0.100) {
led = 5;
} else if ( n > 0.060) {
led = 4;
} else if ( n > 0.030) {
led = 3;
} else if ( n > 0.015) {
led = 2;
} else if ( n > 0.008) {
led = 1;
} else if ( n < 0.009) {
led = -1;
}
return led;
}
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