First version

include/config.h

@@ -0,0 +1,66 @@
+#pragma once
+// MARK: Conversions
+
+#define MS_PER_MIN 60000
+
+// MARK: Hardware
+
+#define NUM_LEDS 12
+#define LED_SPIN_MAX_COUNT (NUM_LEDS * 2)
+#define LED_BATCH_COUNT 2
+
+// MARK: Demo
+
+// Enable the demo mode
+//#define ENABLE_DEMO
+
+// MARK: Logging
+
+// Enable logging to serial connection
+// #define SERIAL_LOGGING
+
+
+// Hardware pins
+
+#define LED_STRIP_PIN 5
+#define BUTTON_PIN    2
+
+// Storage
+
+#define DEMO_MODE_BYTE 0
+
+// Colors
+
+#define MAX_GREEN 90
+#define MAX_RED 5
+
+// Brightness
+
+#define MAX_BRIGHTNESS 250
+#define PULSING_BRIGHTNESS 50
+
+// MARK: Durations
+
+#define STAY_GREEN_DURATION_DEMO        20000
+#define FADE_TO_RED_DURATION_DEMO       30000
+#define PULSING_UNTIL_OFF_DURATION_DEMO 60000
+
+#define STAY_GREEN_DURATION        30*MS_PER_MIN
+#define FADE_TO_RED_DURATION       30*MS_PER_MIN
+#define PULSING_UNTIL_OFF_DURATION 20*MS_PER_MIN
+
+#define SHORT_FADE_DURATION 1500
+
+// Pulsing config
+
+#define PULSING_START_INTERVAL 3500
+#define PULSING_END_INTERVAL 500
+#define PULSE_VARIANCE (PULSING_START_INTERVAL-PULSING_END_INTERVAL)
+
+// Spin config
+
+#define SPIN_SATURATION 255
+#define SPIN_DEMO_ENABLED_HUE 0
+#define SPIN_DEMO_DISABLED_HUE 90
+
+#define MAXIMUM_DELAY 250

include/definitions.h

@@ -0,0 +1,86 @@
+#pragma once
+// MARK: State definition
+#include <Arduino.h>
+#include "config.h"
+
+enum class ProgramState {
+  fadeToGreen = 1,
+  stayGreen = 2,
+  fadeToRed = 3,
+  fadePulseLow = 4,
+  fadePulseHigh = 5,
+  fadeToSleeping = 6,
+  sleeping = 7,
+  toggleDemoMode = 8,
+};
+
+struct FadeComponent {
+
+  // Timestamps for next fade step
+  uint32_t nextFade;
+
+  // Intervals in ms for each fade step
+  uint32_t interval;
+
+  // Fade direction for each component
+  uint8_t direction;
+
+  // Indicator to alternate between LED batches
+  uint8_t skip;
+
+  // Current color
+  uint8_t color;
+
+  // Target color
+  uint8_t endColor;
+
+  uint8_t needsStep(uint32_t time) {
+    if (isDone()) {
+      return 0;
+    }
+    return time >= nextFade;
+  }
+
+  uint8_t isDone() {
+    return color == endColor;
+  }
+
+  uint8_t nextColor() {
+    return color + direction;
+  }
+
+  uint8_t advanceSkipAndColorIfNeeded() {
+    skip = (skip + 1) % LED_BATCH_COUNT;
+    nextFade += interval;
+    if (skip) {
+      // Only update color when all batches are done
+      // i.e. when skip is zero
+      return interval;
+    }
+    if (isDone()) {
+      return 255;
+    }
+    color += direction;
+    return interval;
+  }
+
+  void setNewColor(uint8_t newColor, uint32_t time, uint32_t duration) {
+    endColor = newColor;
+    nextFade = time;
+    skip = 0;
+    if (isDone()) {
+      interval = 255;
+      direction = 0;
+      return;
+    }
+    uint8_t steps;
+    if (endColor > color) {
+      steps = endColor - color;
+      direction = 1;
+    } else {
+      steps = color - endColor;
+      direction = -1;
+    }
+    interval = (duration / steps) / LED_BATCH_COUNT;
+  }
+};

include/log.h

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+#ifdef SERIAL_LOGGING
+#define INIT_LOGGING Serial.begin(115200)
+
+#define LOG_DEBUG(X) \
+Serial.print(X);
+
+#define LOG_DEBUG_LN(X) \
+Serial.println(X);
+
+#else
+
+#define INIT_LOGGING
+#define LOG_DEBUG(X);
+#define LOG_DEBUG_LN(X);
+#endif