Adding Tom's new examples.

build/shared/examples/Control/WhileStatementConditional/applet/WhileStatementConditional.pde

@@ -0,0 +1,70 @@
+/*
+  Conditionals - while statement
+ 
+ This example demonstrates the use of  while() statements.
+ 
+ It reads the state of a potentiometer (an analog input) and blinks an LED
+ while the LED remains above a certain threshold level. It prints the analog value
+ only if it's below the threshold.
+ 
+ This example uses principles explained in the BlinkWithoutDelay  example as well.
+ 
+ The circuit:
+ * potentiometer connected to analog pin 0.
+ Center pin of the potentiometer goes to the analog pin.
+ side pins of the potentiometer go to +5V and ground
+ * LED connected from digital pin 13 to ground
+ 
+ * Note: On most Arduino boards, there is already an LED on the board
+ connected to pin 13, so you don't need any extra components for this example.
+ 
+ created 17 Jan 2009
+ by Tom Igoe
+ 
+ */
+
+#define ledPin 13      // the pin for the LED
+#define analogPin 0    // the analog pin that the potentiometer is attached to
+
+int threshold = 400;   // an arbitrary threshold level that's in the range of the analog input
+int ledState = LOW;    // the state of the LED
+int lastBlinkTime = 0; // last time the LED changed
+int blinkDelay = 500;  // how long to hold between changes of the LED
+  int analogValue;     // variable to hold the value of the analog input
+void setup() {
+  // initialize the LED pin as an output:
+  pinMode(ledPin, OUTPUT);
+  // initialize serial communications:
+  Serial.begin(9600);
+}
+
+void loop() {
+  // read the value of the potentiometer:
+  analogValue = analogRead(analogPin);
+
+  // if the analog value is high enough, turn on the LED:
+  while (analogValue > threshold) {
+    // if enough time has passed since the last change of the LED,
+    // then change it.  Note you're using the technique from BlinkWithoutDelay
+    // here so that the while loop doesn't delay the rest of the program:
+    
+    if (millis() - lastBlinkTime > blinkDelay) {
+      // if the ledState is high, this makes it low, and vice versa:
+      ledState = !ledState;
+      digitalWrite(ledPin, ledState);
+      
+      // save the last time the LED changed in a variable:
+      lastBlinkTime = millis();
+    }
+      // while you're in the while loop, you have to read the 
+      // input again:
+       analogValue = analogRead(analogPin);
+  }
+
+  // if you're below the threshold, print the analog value:
+  Serial.println(analogValue, DEC);
+  // turn the LED off:
+   digitalWrite(ledPin, LOW);
+
+}
+