first commit

libraries/FastLED/examples/RGBWEmulated/RGBWEmulated.ino

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+
+#include <FastLED.h>
+
+// How many leds in your strip?
+#define NUM_LEDS 10
+
+// For led chips like WS2812, which have a data line, ground, and power, you just
+// need to define DATA_PIN.  For led chipsets that are SPI based (four wires - data, clock,
+// ground, and power), like the LPD8806 define both DATA_PIN and CLOCK_PIN
+// Clock pin only needed for SPI based chipsets when not using hardware SPI
+#define DATA_PIN 3
+
+// Define the array of leds
+CRGB leds[NUM_LEDS];
+
+// Time scaling factors for each component
+#define TIME_FACTOR_HUE 60
+#define TIME_FACTOR_SAT 100
+#define TIME_FACTOR_VAL 100
+
+Rgbw rgbw = Rgbw(
+    kRGBWDefaultColorTemp,
+    kRGBWExactColors,      // Mode
+    W3                     // W-placement
+);
+
+typedef WS2812<DATA_PIN, RGB> ControllerT;  // RGB mode must be RGB, no re-ordering allowed.
+static RGBWEmulatedController<ControllerT, GRB> rgbwEmu(rgbw);  // ordering goes here.
+
+void setup() {
+    Serial.begin(115200);
+    //FastLED.addLeds<WS2812, DATA_PIN, GRB>(leds, NUM_LEDS).setRgbw(RgbwDefault());
+    FastLED.addLeds(&rgbwEmu, leds, NUM_LEDS);
+    FastLED.setBrightness(128);  // Set global brightness to 50%
+    delay(2000);  // If something ever goes wrong this delay will allow upload.
+}
+
+void fillAndShow(CRGB color) {
+    for (int i = 0; i < NUM_LEDS; ++i) {
+        leds[i] = color;
+    }
+    FastLED.show();
+}
+
+// Cycle r,g,b,w. Red will blink once, green twice, ... white 4 times.
+void loop() {
+    static size_t frame_count = 0;
+    int frame_cycle = frame_count % 4;
+    frame_count++;
+
+    CRGB pixel;
+    switch (frame_cycle) {
+        case 0:
+            pixel = CRGB::Red;
+            break;
+        case 1:
+            pixel = CRGB::Green;
+            break;
+        case 2:
+            pixel = CRGB::Blue;
+            break;
+        case 3:
+            pixel = CRGB::White;
+            break;
+    }
+
+    for (int i = -1; i < frame_cycle; ++i) {
+        fillAndShow(pixel);
+        delay(200);
+        fillAndShow(CRGB::Black);
+        delay(200);
+    }
+    delay(1000);
+}