Create attiny85_apa102.ino

attiny85_apa102.ino

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+#include <APA102.h>
+
+// Define which pins to use.
+const uint8_t dataPin = 4;
+const uint8_t clockPin = 0;
+const uint8_t BRIGHTNESS_PIN = 3;  // button between this pin and ground
+int mode = 0;
+int r = 0;
+int g = 0;
+int b = 0;
+
+// Create an object for writing to the LED strip.
+APA102<dataPin, clockPin> ledStrip;
+
+// Set the number of LEDs to control.
+const uint16_t ledCount = 5;
+
+// Create a buffer for holding the colors (3 bytes per color).
+rgb_color colors[ledCount];
+
+// Set the brightness to use (the maximum is 31).
+uint8_t brightness = 1;
+
+void setup()
+{
+}
+
+void loop()
+{
+    //check button and change brightness if need be  
+    if (digitalRead(BRIGHTNESS_PIN) == 0)
+    {
+      mode++;
+      mode = mode%3;
+      delay(10); //debounce delay
+    }
+    if (mode == 0)
+    {
+      r = 255;
+      g = 0;
+      b = 0;
+    }
+    else if (mode == 1)
+    {
+      r = 0;
+      g = 255;
+      b = 0;
+    }
+    else if (mode == 2)
+    {
+      r = 0;
+      g = 0;
+      b = 255;
+    }
+
+
+  uint8_t time = millis() >> 2;
+  for(uint16_t i = 0; i < ledCount; i++)
+  {
+    uint8_t x = time - i * 8;
+    colors[i].red = r;
+    colors[i].green = g;
+    colors[i].blue = b;
+  }
+  ledStrip.write(colors, ledCount, brightness);
+}