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--- arduino:led_matrix [2019/04/03 12:18] – created aistis
+++ arduino:led_matrix [2019/04/04 19:32] (current) – aistis
@@ Line 1: / Line 1: @@
 https://www.youtube.com/watch?v=o6_UYb6I4x4
-create led matrix effects
+create led matrix/grid effects
 https://github.com/TylerTimoJ/LMCS2
+<code c++>
+#include <FastLED.h>
+#include <Wire.h>
+#include <VL53L1X.h>
+VL53L1X sensor;
+ #define LED_PIN     15
+ #define COLOR_ORDER GRB
+ #define CHIPSET     WS2812
+ #define NUM_LEDS    (kMatrixWidth * kMatrixHeight)
+ #define FRAMES_PER_SECOND 60
+ //////////////////////////////////////////////////////
+ const uint8_t kMatrixWidth  = 20;
+ const uint8_t kMatrixHeight = 10;
+ const bool    kMatrixSerpentineLayout = true;
+ //////////////////
+ int BRIGHTNESS = 5;
+//////////////////////////////////////////////////
+bool gReverseDirection = false;
+CRGB leds[NUM_LEDS];
+void setup() {
+Serial.begin(115200);
+Serial.println("*** Inicialization");
+///////////////////////////////////////////////
+delay(3000); // sanity delay
+FastLED.addLeds<CHIPSET, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS);
+FastLED.setBrightness( BRIGHTNESS );
+  Wire.begin();
+  Wire.setClock(400000); // use 400 kHz I2C
+  sensor.setTimeout(500);
+  while (!sensor.init())
+  {
+    Serial.println("Failed to detect and initialize sensor!");
+    delay(100);
+  }
+  Serial.println("INIT");
+  sensor.setDistanceMode(VL53L1X::Long);
+  sensor.setMeasurementTimingBudget(33000);
+  // Start continuous readings at a rate of one measurement every 50 ms (the
+  // inter-measurement period). This period should be at least as long as the
+  // timing budget.
+  sensor.startContinuous(33);
+}
+/////////////////////////////////// end setup
+int COOLING = 90; //this is hack
+void loop()
+{
+ Fire2012();
+ FastLED.show(); // display this frame
+ FastLED.delay(1000 / FRAMES_PER_SECOND); //TODO: change thi time measure
+  auto ss = sensor.read();
+  static int s = 0;
+  Serial.print(ss);
+  if (sensor.timeoutOccurred()) { Serial.print(" TIMEOUT"); }
+  else {
+    COOLING = ss/10; // burimas cia
+        Serial.print(",");   Serial.print(COOLING);
+    //FastLED.delay(ss /10);
+    }
+    int aaa = analogRead(A0);
+    if (aaa<690) { BRIGHTNESS --; FastLED.setBrightness(BRIGHTNESS); }
+    if (aaa>720) { BRIGHTNESS ++; FastLED.setBrightness(BRIGHTNESS); }
+    if (BRIGHTNESS < 1) BRIGHTNESS = 1;
+    if (BRIGHTNESS >= 255) BRIGHTNESS = 255;
+     FastLED.setBrightness( BRIGHTNESS );
+    Serial.print(",");   Serial.print(aaa);
+    Serial.print(",");   Serial.print(BRIGHTNESS);
+    Serial.println();
+ }
+ void Fire2012()
+ {
+  int SPARKING = 100;
+   // Array of temperature readings at each simulation cell
+    static byte heat[kMatrixWidth] [kMatrixHeight];
+    // Step 1.  Cool down every cell a little
+    for (int n = 0; n< kMatrixHeight; n++)
+   {
+     for ( int i = 0; i < kMatrixWidth; i++) {
+       heat[i][n] = qsub8( heat[i][n],  random8(0,
+       ((COOLING * 10) / (kMatrixWidth)) + 2));
+       }
+       // Step 2.
+      for ( int k = (kMatrixWidth- 1); k >= 2; k--) {
+      heat[k][n] = (heat[k - 1][n] + heat[k - 2][n] +
+      heat[k - 2][n] ) / 3;
+      }
+       // Step 3.
+      if ( random8() < SPARKING ) {
+       int y = random8(3);
+       heat[y][n] = qadd8( heat[y][n], random8(160, 255) );
+      }
+     }
+  // Step 4.  Map from heat cells to LED colors
+for ( int i= 0; i < kMatrixWidth; i++) {
+  for (int j = 0; j < kMatrixHeight; j++) {
+    CRGB color = HeatColor(heat[i][j]);
+    leds[XY(i, j)] = color;
+     }
+   }
+ }
+   /////////////
+    uint16_t XY( uint8_t x, uint8_t y)
+    {
+    uint16_t i;
+    if ( kMatrixSerpentineLayout == false) {
+    i = (y * kMatrixWidth) + x;
+    }
+    if ( kMatrixSerpentineLayout == true) {
+    if ( y & 0x01) {
+     // Odd rows run backwards
+     uint8_t reverseX = (kMatrixWidth - 1) - x;
+     i = (y * kMatrixWidth) + reverseX;
+     } else {
+    // Even rows run forwards
+      i = (y * kMatrixWidth) + x;
+     }
+    }
+    return i;
+   }/////
+</code>