【花雕动手做】有趣好玩的音乐可视化系列小项目（07）---大方格频谱灯 简单

/*
  【花雕动手做】音乐可视化系列小项目（07）---大方格频谱灯
   项目之一：动态音乐频谱仪
  接脚连线：MAX9814 接A0
  MAX7219       UNO
  VCC  →→→→→ 5V
  GND  →→→→→ GND
  DIN  →→→→→ D12（数据，数据接收引脚）
  CS   →→→→→ D11（负载，命令接收引脚）
  CLK  →→→→→ D10（时钟，时钟引脚）
*/

#include "LedControl.h"

/* Led matrix - Max7219 Declared */
LedControl lc = LedControl(12, 11, 10, 1);

const int maxScale = 11;

/*  Sensor - Max9812 Declared */
const int sensorPin = A4;
const int sampleWindow = 50;  // 50ms = 20Hz
unsigned int sample;

unsigned long startMillis;
unsigned long timeCycle;

unsigned int signalMax = 0;
unsigned int signalMin = 1024;
unsigned char index = 0;

unsigned int peakToPeak[8];
unsigned int displayPeak[8];
unsigned int temp[8] = {0, 0, 0, 0, 0, 0, 0, 0};
unsigned int signalMaxBuff[8];
unsigned int signalMinBuff[8];


void setup() {
  // Led matrix
  lc.shutdown(0, false); // bật hiện thị
  lc.setIntensity(0, 1); // chỉnh độ sáng
  lc.clearDisplay(0); // tắt tất cả led

  Serial.begin(9600);
}

void loop() {
  startMillis = millis();
  //peakToPeak = 0;

  signalMax = 0;
  signalMin = 1024;

  // Get data in 50ms
  while (millis() - startMillis < sampleWindow) {
    sample = analogRead(sensorPin);

    if (sample < 1024) {
      if (sample > signalMax) {
        signalMax = sample;
      }
      if (sample < signalMin) {
        signalMin = sample;
      }
    }

    // 20Hz - 64Hz - 125Hz - 250Hz - 500Hz - 1kHz (timeCycle = 1/F)(ms)
    timeCycle = millis() - startMillis;
    if (timeCycle == 1 || timeCycle == 2 || timeCycle == 4 || timeCycle == 8
        || timeCycle == 16 || timeCycle == 32 || timeCycle == 40 || timeCycle == 50) {
      signalMaxBuff[index] = signalMax;
      signalMinBuff[index] = signalMin;
      index = (index + 1) % 8;
      delay(1);
      //Serial.println(timeCycle);
    }
  }

  // Delete pointer to array
  index = 0;

  // Calculation after get samples
  for (int i = 0; i < 8; i++) {  // i = row (led matrix)
    // sound level
    peakToPeak[i] = signalMaxBuff[i] - signalMinBuff[i];

    // Map 1v p-p level to the max scale of the display
    displayPeak[i] = map(peakToPeak[i], 0, 1023, 0, maxScale);

    // Show to led matrix
    displayLed(displayPeak[i], i);

    // Led drop down
    if (displayPeak[i] >= temp[i]) {
      temp[i] = displayPeak[i];
    }
    else {
      temp[i]--;
    }

    lc.setLed(0, i, temp[i], true);
    delayMicroseconds(250);
  }

}

void displayLed(int displayPeak, int row) {
  switch (displayPeak) {
    case 0 : lc.setRow(0, row, 0x80); break;
    case 1 : lc.setRow(0, row, 0xC0); break;
    case 2 : lc.setRow(0, row, 0xE0); break;
    case 3 : lc.setRow(0, row, 0xF0); break;
    case 4 : lc.setRow(0, row, 0xF8); break;
    case 5 : lc.setRow(0, row, 0xFC); break;
    case 6 : lc.setRow(0, row, 0xFE); break;
    case 7 : lc.setRow(0, row, 0xFF); break;
  }
}

/*
  【花雕动手做】音乐可视化系列小项目（07）---大方格频谱灯
  项目之二：FFT算法，八段音乐可视化动态频谱仪
*/

#include <arduinoFFT.h>

#include <MD_MAX72xx.h>

#include <SPI.h>

MD_MAX72XX disp = MD_MAX72XX(MD_MAX72XX::FC16_HW, 10, 1);

arduinoFFT FFT = arduinoFFT();

double realComponent[64];

double imagComponent[64];

int spectralHeight[] = {0b00000000, 0b10000000, 0b11000000,

                        0b11100000, 0b11110000, 0b11111000,

                        0b11111100, 0b11111110, 0b11111111
                       };

int index, c, value;

void setup()

{

  disp.begin();

  Serial.begin(9600);

}

void loop()

{

  int sensitivity = map(analogRead(A0), 0, 1023, 50, 100);

  Serial.println (analogRead(A0));

  for (int i = 0; i < 64; i++)

  {

    realComponent[i] = analogRead(A7) / sensitivity;

    imagComponent[i] = 0;

  }

  FFT.Windowing(realComponent, 64, FFT_WIN_TYP_HAMMING, FFT_FORWARD);

  FFT.Compute(realComponent, imagComponent, 64, FFT_FORWARD);

  FFT.ComplexToMagnitude(realComponent, imagComponent, 64);

  for (int i = 0; i < 32; i++)

  {

    realComponent[i] = constrain(realComponent[i], 0, 80);

    realComponent[i] = map(realComponent[i], 0, 80, 0, 8);

    index = realComponent[i];

    value = spectralHeight[index];

    c = 31 - i;

    disp.setColumn(c, value);

  }

}

/*
  【花雕动手做】有趣好玩的音乐可视化系列小项目（07）---大方格频谱灯
  项目之三：多档arduinoFFT浮点频谱灯
*/

#include <arduinoFFT.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

#define SAMPLES 64
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES  4
#define CLK_PIN   13
#define DATA_PIN  11
#define CS_PIN    10
#define  xres 32
#define  yres 8


int MY_ARRAY[] = {0, 128, 192, 224, 240, 248, 252, 254, 255};
int MY_MODE_1[] = {0, 128, 192, 224, 240, 248, 252, 254, 255};
int MY_MODE_2[] = {0, 128, 64, 32, 16, 8, 4, 2, 1};
int MY_MODE_3[] = {0, 128, 192, 160, 144, 136, 132, 130, 129};
int MY_MODE_4[] = {0, 128, 192, 160, 208, 232, 244, 250, 253};
int MY_MODE_5[] = {0, 1, 3, 7, 15, 31, 63, 127, 255};


double vReal[SAMPLES];
double vImag[SAMPLES];
char data_avgs[xres];

int yvalue;
int displaycolumn , displayvalue;
int peaks[xres];
const int buttonPin = 2;
int state = HIGH;
int previousState = LOW;
int displaymode = 1;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;


MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
arduinoFFT FFT = arduinoFFT();



void setup() {

  ADCSRA = 0b11100101;
  ADMUX = 0b00000000;
  pinMode(buttonPin, INPUT);
  mx.begin();
  delay(50);
}

void loop() {
  // ++ Sampling
  for (int i = 0; i < SAMPLES; i++)
  {
    while (!(ADCSRA & 0x10));
    ADCSRA = 0b11110101 ;
    int value = ADC - 512 ;
    vReal[i] = value / 8;
    vImag[i] = 0;
  }

  FFT.Windowing(vReal, SAMPLES, FFT_WIN_TYP_HAMMING, FFT_FORWARD);
  FFT.Compute(vReal, vImag, SAMPLES, FFT_FORWARD);
  FFT.ComplexToMagnitude(vReal, vImag, SAMPLES);

  int step = (SAMPLES / 2) / xres;
  int c = 0;
  for (int i = 0; i < (SAMPLES / 2); i += step)
  {
    data_avgs[c] = 0;
    for (int k = 0 ; k < step ; k++) {
      data_avgs[c] = data_avgs[c] + vReal[i + k];
    }
    data_avgs[c] = data_avgs[c] / step;
    c++;
  }

  for (int i = 0; i < xres; i++)
  {
    data_avgs[i] = constrain(data_avgs[i], 0, 80);
    data_avgs[i] = map(data_avgs[i], 0, 80, 0, yres);
    yvalue = data_avgs[i];

    peaks[i] = peaks[i] - 1;
    if (yvalue > peaks[i])
      peaks[i] = yvalue ;
    yvalue = peaks[i];
    displayvalue = MY_ARRAY[yvalue];
    displaycolumn = 15 - i;
    mx.setColumn(displaycolumn, displayvalue);
  }

  displayModeChange ();
}

void displayModeChange() {
  int reading = digitalRead(buttonPin);
  if (reading == HIGH && previousState == LOW && millis() - lastDebounceTime > debounceDelay)

  {

    switch (displaymode) {
      case 1:
        displaymode = 2;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_2[i];
        }
        break;
      case 2:
        displaymode = 3;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_3[i];
        }
        break;
      case 3:
        displaymode = 4;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_4[i];
        }
        break;
      case 4:
        displaymode = 5;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_5[i];
        }
        break;
      case 5:
        displaymode = 1;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_1[i];
        }
        break;
    }

    lastDebounceTime = millis();
  }
  previousState = reading;
}

/*
  【花雕动手做】有趣好玩的音乐可视化系列小项目（07）---大方格频谱灯
   项目之四：24段三级联FFT浮点多色频谱灯
*/

#include <arduinoFFT.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

#define SAMPLES 64
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES  3
#define CLK_PIN   13
#define DATA_PIN  11
#define CS_PIN    10
#define  xres 24
#define  yres 8


int MY_ARRAY[] = {0, 128, 192, 224, 240, 248, 252, 254, 255};
int MY_MODE_1[] = {0, 128, 192, 224, 240, 248, 252, 254, 255};
int MY_MODE_2[] = {0, 128, 64, 32, 16, 8, 4, 2, 1};
int MY_MODE_3[] = {0, 128, 192, 160, 144, 136, 132, 130, 129};
int MY_MODE_4[] = {0, 128, 192, 160, 208, 232, 244, 250, 253};
int MY_MODE_5[] = {0, 1, 3, 7, 15, 31, 63, 127, 255};


double vReal[SAMPLES];
double vImag[SAMPLES];
char data_avgs[xres];

int yvalue;
int displaycolumn , displayvalue;
int peaks[xres];
const int buttonPin = 2;
int state = HIGH;
int previousState = LOW;
int displaymode = 1;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;


MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
arduinoFFT FFT = arduinoFFT();



void setup() {

  ADCSRA = 0b11100101;
  ADMUX = 0b00000000;
  pinMode(buttonPin, INPUT);
  mx.begin();
  delay(50);
}

void loop() {
  // ++ Sampling
  for (int i = 0; i < SAMPLES; i++)
  {
    while (!(ADCSRA & 0x10));
    ADCSRA = 0b11110101 ;
    int value = ADC - 512 ;
    vReal[i] = value / 8;
    vImag[i] = 0;
  }

  FFT.Windowing(vReal, SAMPLES, FFT_WIN_TYP_HAMMING, FFT_FORWARD);
  FFT.Compute(vReal, vImag, SAMPLES, FFT_FORWARD);
  FFT.ComplexToMagnitude(vReal, vImag, SAMPLES);

  int step = (SAMPLES / 2) / xres;
  int c = 0;
  for (int i = 0; i < (SAMPLES / 2); i += step)
  {
    data_avgs[c] = 0;
    for (int k = 0 ; k < step ; k++) {
      data_avgs[c] = data_avgs[c] + vReal[i + k];
    }
    data_avgs[c] = data_avgs[c] / step;
    c++;
  }

  for (int i = 0; i < xres; i++)
  {
    data_avgs[i] = constrain(data_avgs[i], 0, 80);
    data_avgs[i] = map(data_avgs[i], 0, 80, 0, yres);
    yvalue = data_avgs[i];

    peaks[i] = peaks[i] - 1;
    if (yvalue > peaks[i])
      peaks[i] = yvalue ;
    yvalue = peaks[i];
    displayvalue = MY_ARRAY[yvalue];
    displaycolumn = 15 - i;
    mx.setColumn(displaycolumn, displayvalue);
  }

  displayModeChange ();
}

void displayModeChange() {
  int reading = digitalRead(buttonPin);
  if (reading == HIGH && previousState == LOW && millis() - lastDebounceTime > debounceDelay)

  {

    switch (displaymode) {
      case 1:
        displaymode = 2;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_2[i];
        }
        break;
      case 2:
        displaymode = 3;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_3[i];
        }
        break;
      case 3:
        displaymode = 4;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_4[i];
        }
        break;
      case 4:
        displaymode = 5;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_5[i];
        }
        break;
      case 5:
        displaymode = 1;
        for (int i = 0 ; i <= 8 ; i++ ) {
          MY_ARRAY[i] = MY_MODE_1[i];
        }
        break;
    }

    lastDebounceTime = millis();
  }
  previousState = reading;
}

/*
  【花雕动手做】有趣好玩的音乐可视化系列小项目（07）---大方格频谱灯
   项目之五：红白绿三色24段三级联频谱大方格灯（FFT算法）
*/

#include <arduinoFFT.h>

#include <MD_MAX72xx.h>

#include <SPI.h>

MD_MAX72XX disp = MD_MAX72XX(MD_MAX72XX::FC16_HW, 10, 3);

arduinoFFT FFT = arduinoFFT();

double realComponent[64];

double imagComponent[64];

int spectralHeight[] = {0b00000000, 0b10000000, 0b11000000,

                        0b11100000, 0b11110000, 0b11111000,

                        0b11111100, 0b11111110, 0b11111111
                       };

int index, c, value;

void setup()

{

  disp.begin();

  Serial.begin(9600);

}

void loop()

{

  int sensitivity = map(analogRead(A0), 0, 1023, 50, 100);

  Serial.println (analogRead(A0));

  for (int i = 0; i < 64; i++)

  {

    realComponent[i] = analogRead(A0) / sensitivity;

    imagComponent[i] = 0;

  }

  FFT.Windowing(realComponent, 64, FFT_WIN_TYP_HAMMING, FFT_FORWARD);

  FFT.Compute(realComponent, imagComponent, 64, FFT_FORWARD);

  FFT.ComplexToMagnitude(realComponent, imagComponent, 64);

  for (int i = 0; i < 32; i++)

  {

    realComponent[i] = constrain(realComponent[i], 0, 80);

    realComponent[i] = map(realComponent[i], 0, 80, 0, 8);

    index = realComponent[i];

    value = spectralHeight[index];

    c = 31 - i;

    disp.setColumn(c, value);

  }

}