Add a demo Arduino file

ino/demo/demo.ino

@@ -0,0 +1,65 @@
+
+/**
+ * Prototype
+ * Arduino Duemilanove
+ * L298N shield V03
+ * 
+ * Pin 13 = motor A or coil A +
+ * Pin 12 = motor A or coil A –
+ * Pin 11 = motor B or coil B +
+ * Pin 10 = motor A or coil A enable
+ * Pin 9 = motor B or coil B enable
+ * Pin 8 = motor B or coil B –
+ **/
+
+#define Apos 13
+#define Aneg 12
+#define Aenable 10
+
+void setup() {
+  pinMode(Apos, OUTPUT);
+  pinMode(Aneg, OUTPUT);
+  pinMode(Aenable, OUTPUT);
+}
+
+void loop() {
+  clockwise();
+  set_speed(50); 
+  delay(5000);
+  brake();
+  delay(2000);
+  counter_clockwise();
+  set_speed(100);
+  delay(5000);
+  brake();
+  delay(2000);
+}
+
+//input value from 0 to 255
+void set_speed (int val){ 
+  analogWrite(Aenable, val);
+}
+
+void clockwise(){
+  digitalWrite(Apos, HIGH);
+  digitalWrite(Aneg, LOW);  
+}
+
+void counter_clockwise(){
+  digitalWrite(Apos, LOW);
+  digitalWrite(Aneg, HIGH);  
+}
+
+void brake (){
+  digitalWrite(Aenable, LOW);
+}
+
+/**
+ * Vex = higher voltage that can power the motor and/or the shield as well as the Arduino if wanted
+ * 5V = Must be a clean 5V that can power the Arduino and shield, and if wanted also the motor itself
+ * GND = ass always, the ground of everything
+ * B- = Connection of the first motor or first winding of the stepper motor
+ * B+ = Connection of the first motor or first winding of the stepper motor
+ * A- = Connection of the second motor or second winding of the stepper motor
+ * A+ = Connection of the second motor or second winding of the stepper motor
+ **/