Effect "Heartbeat" (#680)

wled00/FX.cpp

@@ -3119,4 +3119,44 @@ uint16_t WS2812FX::mode_percent(void) {
   }
 
  	return FRAMETIME;
+}
+
+uint16_t WS2812FX::mode_heartbeat(void) {
+  static unsigned long lastBeat = 0;
+  static bool secondBeatActive = false;
+
+  uint8_t bpm = 40 + (SEGMENT.speed >> 4);
+  uint32_t msPerBeat = (60000 / bpm);
+  uint32_t secondBeat = (msPerBeat / 3);
+
+  // Get and translate the segment's size option
+  uint8_t size = 2 << ((SEGMENT.options >> 1) & 0x03); // 2,4,8,16
+
+  // copy pixels from the middle of the segment to the edges
+  uint16_t bytesPerPixelBlock = size * 4;
+  uint16_t centerOffset = (SEGLEN / 2) * 4;
+  uint16_t byteCount = centerOffset - bytesPerPixelBlock;
+  memmove(bus->GetPixels(), bus->GetPixels() + bytesPerPixelBlock, byteCount);
+  memmove(bus->GetPixels() + centerOffset + bytesPerPixelBlock, bus->GetPixels() + centerOffset, byteCount);
+
+  fade_out(255 - SEGMENT.intensity);
+
+  unsigned long beatTimer = millis() - lastBeat;
+  if((beatTimer > secondBeat) && !secondBeatActive) { // time for the second beat?
+    uint16_t startLed = (SEGLEN / 2) - size;
+    for (uint16_t i = startLed; i < startLed + (size * 2); i++) {
+      setPixelColor(i, SEGMENT.colors[0]);
+    }
+    secondBeatActive = 1;
+  }
+  if(beatTimer > msPerBeat) { // time to reset the beat timer?
+    uint16_t startLed = (SEGLEN / 2) - size;
+    for (uint16_t i = startLed; i < startLed + (size * 2); i++) {
+      setPixelColor(i, SEGMENT.colors[0]);
+    }
+    secondBeatActive = 0;
+    lastBeat = millis();
+  }
+
+  return FRAMETIME;
 }

wled00/FX.h

@@ -193,6 +193,7 @@
 #define FX_MODE_PLASMA                  97
 #define FX_MODE_PERCENT                 98
 #define FX_MODE_RIPPLE_RAINBOW          99
+#define FX_MODE_HEARTBEAT              100
 
 class WS2812FX {
   typedef uint16_t (WS2812FX::*mode_ptr)(void);
@@ -380,6 +381,7 @@ class WS2812FX {
       _mode[FX_MODE_DRIP]                    = &WS2812FX::mode_drip;
       _mode[FX_MODE_PLASMA]                  = &WS2812FX::mode_plasma;
       _mode[FX_MODE_PERCENT]                 = &WS2812FX::mode_percent;
+      _mode[FX_MODE_HEARTBEAT]               = &WS2812FX::mode_heartbeat;
       _mode[FX_MODE_RIPPLE_RAINBOW]          = &WS2812FX::mode_ripple_rainbow;
 
       _brightness = DEFAULT_BRIGHTNESS;
@@ -565,6 +567,7 @@ class WS2812FX {
       mode_drip(void),
       mode_plasma(void),
       mode_percent(void),
+      mode_heartbeat(void);
       mode_ripple_rainbow(void);
       
 
@@ -646,7 +649,8 @@ const char JSON_mode_names[] PROGMEM = R"=====([
 "Scanner Dual","Stream 2","Oscillate","Pride 2015","Juggle","Palette","Fire 2012","Colorwaves","Bpm","Fill Noise",
 "Noise 1","Noise 2","Noise 3","Noise 4","Colortwinkles","Lake","Meteor","Meteor Smooth","Railway","Ripple",
 "Twinklefox","Twinklecat","Halloween Eyes","Solid Pattern","Solid Pattern Tri","Spots","Spots Fade","Glitter","Candle","Fireworks Starburst",
-"Fireworks 1D","Bouncing Balls","Sinelon","Sinelon Dual","Sinelon Rainbow","Popcorn","Drip","Plasma","Percent", "Ripple Rainbow"
+"Fireworks 1D","Bouncing Balls","Sinelon","Sinelon Dual","Sinelon Rainbow","Popcorn","Drip","Plasma","Percent","Ripple Rainbow",
+"Heartbeat"
 ])=====";
 
 

wled00/NpbWrapper.h

@@ -287,6 +287,15 @@ public:
     return 0;
   }
 
+  uint8_t* GetPixels(void)
+  {
+    switch (_type) {
+      case NeoPixelType_Grb:  return _pGrb->Pixels();  break;
+      case NeoPixelType_Grbw: return _pGrbw->Pixels(); break;
+    }
+    return 0;
+  }
+
 
 private:
   NeoPixelType _type;