pdesantis · June 18, 2013 00:02 · Jun 18, 2013
diff --git a/led_pulse.ino b/led_pulse.ino
@@ -0,0 +1,63 @@
+// Arduino Workshop Project 3
+// PWM
+
+int d = 5;              // d is used for time delay
+const int number_of_pins = 5; // the number of output pins
+int pins[number_of_pins] = {3, 5, 6, 9, 10};  // an array storing each output pin
+
+// Sets the proper pins to output mode
+void setup()
+{
+  for (int i = 0; i < number_of_pins; i++)
+  {
+    pinMode(pins[i], OUTPUT);
+  }
+}
+
+void loop()
+{
+  // Loop through each pin in pins array, pulsing them one at a time
+  for (int i = 0; i < number_of_pins; i++)
+  {
+    pulsePin(pins[i]);
+  }
+
+  // Pause for 200 milliseconds
+  delay(200);
+}
+
+
+// ******* Helper methods *******
+
+// Function: lightUpPin
+// Write analog values 0 to 255 to the specified pin
+// Parameter: pin - the pin to light up
+void lightUpPin(int pin)
+{
+  for ( int a = 0 ; a < 256 ; a++ )
+  {
+    analogWrite(pin, a);
+    delay(d);
+  }
+}
+
+// Function: lightUpPin
+// Write analog values 255 to 0 to the specified pin
+// Parameter: pin - the pin to dim
+void dimPin(int pin)
+{
+  for ( int a = 255 ; a >= 0 ; a-- )
+  {
+    analogWrite(pin, a);
+    delay(d);
+  }
+}
+
+// Function: pulsePin
+// Pulses a pin from analog 0 to 255 and back to 0
+// Parameter: pin - the pin to pulse
+void pulsePin(int pin)
+{
+  lightUpPin(pin);
+  dimPin(pin);
+}