arduino-0018-linux-x64

arduino-0018-linux-x64/examples/Control/switchCase/switchCase.pde

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+/*
+  Switch statement
+ 
+ Demonstrates the use of a switch statement.  The switch
+ statement allows you to choose from among a set of discrete values
+ of a variable.  It's like a series of if statements.
+ 
+ To see this sketch in action, but the board and sensor in a well-lit
+ room, open the serial monitor, and and move your hand gradually
+ down over the sensor.
+ 
+ The circuit:
+ * photoresistor from analog in 0 to +5V
+ * 10K resistor from analog in 0 to ground
+ 
+ created 1 Jul 2009
+ by Tom Igoe 
+ 
+ http://www.arduino.cc/en/Tutorial/SwitchCase
+ */
+
+// these constants won't change:
+const int sensorMin = 0;      // sensor minimum, discovered through experiment
+const int sensorMax = 600;    // sensor maximum, discovered through experiment
+
+void setup() {
+  // initialize serial communication:
+  Serial.begin(9600);  
+}
+
+void loop() {
+  // read the sensor:
+  int sensorReading = analogRead(0);
+  // map the sensor range to a range of four options:
+  int range = map(sensorReading, sensorMin, sensorMax, 0, 3);
+
+  // do something different depending on the 
+  // range value:
+  switch (range) {
+  case 0:    // your hand is on the sensor
+    Serial.println("dark");
+    break;
+  case 1:    // your hand is close to the sensor
+    Serial.println("dim");
+    break;
+  case 2:    // your hand is a few inches from the sensor
+    Serial.println("medium");
+    break;
+  case 3:    // your hand is nowhere near the sensor
+    Serial.println("bright");
+    break;
+  } 
+
+}
+
+
+
+
+