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libraries/Adafruit_CircuitPlayground/examples/mega_demo/SensorDemo.h

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+#ifndef SENSORDEMO_H
+#define SENSORDEMO_H
+
+#include "Demo.h"
+
+// Define small, medium, large range of light sensor values.
+static int minLight[] = {  0,   0,    0};
+static int maxLight[] = { 50, 255, 1023};
+
+// Define small, medium, large range of temp sensor values (in Fahrenheit).
+static float minTempF[] = {  80.0,  70.0,  -32.0};
+static float maxTempF[] = {  85.0,  90.0, 212.0};
+
+// Define color for light sensor pixels.
+#define LIGHT_RED   0xFF
+#define LIGHT_GREEN 0x00
+#define LIGHT_BLUE  0x00
+
+// Define color for temp sensor pixels.
+#define TEMP_RED    0x00
+#define TEMP_GREEN  0x00
+#define TEMP_BLUE   0xFF
+
+class SensorDemo: public Demo {
+public:
+  SensorDemo() { mode = 0; }
+  ~SensorDemo() {}
+
+  virtual void loop() {
+    // Reset all lights to off.
+    for (int i=0; i<10; ++i) {
+      CircuitPlayground.strip.setPixelColor(i, 0);
+    }
+    
+    // Measure the light level and use it to light up its LEDs (right half).
+    uint16_t light = CircuitPlayground.lightSensor();
+    int level = (int)lerp(light, minLight[mode], maxLight[mode], 0.0, 5.0);
+    for (int i=9; i>9-level; --i) {
+      CircuitPlayground.strip.setPixelColor(i, LIGHT_RED, LIGHT_GREEN, LIGHT_BLUE);
+    }
+
+    // Measure the temperatue and use it to light up its LEDs (left half).
+    float tempF = CircuitPlayground.temperatureF();
+    level = (int)lerp(tempF, minTempF[mode], maxTempF[mode], 0.0, 5.0);
+    for (int i=0; i<level; ++i) {
+      CircuitPlayground.strip.setPixelColor(i, TEMP_RED, TEMP_GREEN, TEMP_BLUE);
+    }
+
+    // Light up the pixels!
+    CircuitPlayground.strip.show();
+  }
+
+  virtual void modePress() {
+    // Switch to one of three modes for small, medium, big ranges of measurements.
+    mode += 1;
+    if (mode > 2) {
+      mode = 0;
+    }
+  }
+
+private:
+  int mode;
+};
+
+#endif