Create 8x32_matrix_music_visualizer_sparkfun_spectrum_shield.ino

Author: Red Team

8x32_matrix_music_visualizer_sparkfun_spectrum_shield.ino

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+#include <Adafruit_NeoMatrix.h>
+#include <Adafruit_NeoPixel.h>
+ 
+#define PIN 6
+
+// PANEL SETUP
+int width = 32;
+int height = 8;
+int NUM_LEDS = width * height;
+int band_width = 4;
+
+// AUDIO INPUT SETUP
+int strobe = 4;
+int reset = 5;
+int audio1 = A0;
+int audio2 = A1;
+int left[7];
+int right[7];
+int band;
+int audio_input = 0;
+int freq = 0;
+int react_arr[] = {0, 0, 0, 0, 0, 0, 0};
+int prereact_arr[] = {0, 0, 0, 0, 0, 0, 0};
+
+
+// STANDARD VISUALIZER VARIABLES
+float modifier = 2.5; // CONTROLS SENSITIVITY OF THE LED REACTION
+int loop_max = 0;
+int k = 255; // COLOR WHEEL POSITION
+int decay = 1; // HOW MANY MS BEFORE ONE LIGHT DECAY
+int decay_check = 0;
+//long pre_react = 0; // NEW SPIKE CONVERSION
+//long react = 0; // NUMBER OF LEDs BEING LIT
+long post_react = 0; // OLD SPIKE CONVERSION
+
+
+// RAINBOW WAVE SETTINGS
+int wheel_speed = 2;
+ 
+Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(width, height, PIN,
+  NEO_MATRIX_BOTTOM    + NEO_MATRIX_RIGHT +
+  NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG,
+  NEO_GRB            + NEO_KHZ800);
+ 
+const uint16_t colors[] = {
+  matrix.Color(255, 0, 0), matrix.Color(0, 255, 0), matrix.Color(255, 255, 0),matrix.Color(0, 0, 255), matrix.Color(255, 0, 255), matrix.Color(0, 255, 255), matrix.Color(255, 255, 255)};
+
+
+void readMSGEQ7()
+// Function to read 7 band equalizers
+{
+  digitalWrite(reset, HIGH);
+  digitalWrite(reset, LOW);
+  for(band=0; band <7; band++)
+  {
+    digitalWrite(strobe, LOW); // strobe pin on the shield - kicks the IC up to the next band 
+    delayMicroseconds(30); // 
+    left[band] = analogRead(audio1) * modifier; // store left band reading
+    right[band] = analogRead(audio2) * modifier; // ... and the right
+
+    if (left[band] > 1023)
+      left[band] = 1023;
+    if (right[band] > 1023)
+      right[band] = 1023;
+      
+    digitalWrite(strobe, HIGH); 
+  }
+}
+
+
+
+uint32_t Scroll(int pos) {
+  int g;
+  int r;
+  int b;
+  if(pos < 85) {
+    g = 0;
+    r = ((float)pos / 85.0f) * 255.0f;
+    b = 255 - r;
+  } else if(pos < 170) {
+    g = ((float)(pos - 85) / 85.0f) * 255.0f;
+    r = 255 - g;
+    b = 0;
+  } else if(pos < 256) {
+    b = ((float)(pos - 170) / 85.0f) * 255.0f;
+    g = 255 - b;
+    r = 1;
+  }
+  return matrix.Color(g, r, b);
+}
+
+
+
+
+void singleRainbow()
+{
+  int band_width = width / 7;
+  for(int x = 6, x2 = 0; x >= 0, x2 < 7; x--, x2++)
+  {
+    for(int i = height - 1; i >= 0; i--) {
+      for(int w = 1; w <= band_width; w++)
+      {
+        if (i < react_arr[x])
+          matrix.drawPixel((x2 * band_width) + w, i, Scroll((i * 256 / 50 + k) % 256));
+          //matrix.setPixelColor((8 * x) + i, Scroll((i * 256 / 50 + k) % 256));
+          
+        else
+          matrix.drawPixel((x2 * band_width) + w, i, (0, 0, 0));
+          //matrix.setPixelColor((8 * x) + i, (0, 0, 0));   
+      }   
+    }
+  }
+  matrix.show(); 
+}
+
+
+void convertSingle(int i)
+{
+  if (left[i] > right[i])
+    audio_input = left[i];
+  else
+    audio_input = right[i];
+
+  if (audio_input > 80 * modifier)
+  {
+    prereact_arr[i] = ((long)height * (long)audio_input) / 1023L; // TRANSLATE AUDIO LEVEL TO NUMBER OF LEDs
+
+    if (prereact_arr[i] > react_arr[i]) // ONLY ADJUST LEVEL OF LED IF LEVEL HIGHER THAN CURRENT LEVEL
+      react_arr[i] = prereact_arr[i];
+
+    Serial.print(audio_input);
+    Serial.print(" -> ");
+    Serial.println(prereact_arr[i]);
+  }
+}
+
+
+
+// FUNCTION TO VISUALIZE WITH A SINGLE LEVEL
+void singleLevel()
+{
+  readMSGEQ7();
+
+  for (int i = 0; i < 7; i++)
+    convertSingle(i);
+
+  singleRainbow(); // APPLY COLOR
+
+  k = k - wheel_speed; // SPEED OF COLOR WHEEL
+  if (k < 0) // RESET COLOR WHEEL
+    k = 255;
+
+  // REMOVE LEDs
+  decay_check++;
+  if (decay_check > decay)
+  {
+    decay_check = 0;
+    for (int x = 0; x < 7; x++)
+    {
+      if (react_arr[x] > 0)
+        react_arr[x]--;
+    }
+  }
+}
+
+
+
+void setup() {
+  // SPECTRUM SETUP
+  pinMode(audio1, INPUT);
+  pinMode(audio2, INPUT);
+  pinMode(strobe, OUTPUT);
+  pinMode(reset, OUTPUT);
+  digitalWrite(reset, LOW);
+  digitalWrite(strobe, HIGH);
+  
+  matrix.begin();
+  matrix.setTextWrap(false);
+  matrix.setBrightness(5);
+  matrix.setTextColor(colors[0]);
+
+  // SERIAL AND INPUT SETUP
+  Serial.begin(115200);
+  Serial.println("\nListening...");
+}
+
+
+
+void loop()
+{  
+  singleLevel();
+  //doubleLevel();
+  //delay(1);
+}