added new stepper library examples

libraries/Stepper/examples/stepper_oneStepAtATime/stepper_oneStepAtATime.pde

@@ -0,0 +1,44 @@
+
+/* 
+ Stepper Motor Control - one step at a time
+ 
+ This program drives a unipolar or bipolar stepper motor. 
+ The motor is attached to digital pins 8 - 11 of the Arduino.
+ 
+ The motor will step one step at a time, very slowly.  You can use this to
+ test that you've got the four wires of your stepper wired to the correct
+ pins. If wired correctly, all steps should be in the same direction.
+ 
+ Use this also to count the number of steps per revolution of your motor,
+ if you don't know it.  Then plug that number into the oneRevolution
+ example to see if you got it right.
+ 
+ Created 30 Nov. 2009
+ by Tom Igoe
+ 
+ */
+
+#include <Stepper.h>
+
+const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
+                                     // for your motor
+
+// initialize the stepper library on pins 8 through 11:
+Stepper myStepper(stepsPerRevolution, 8,9,10,11);            
+
+int stepCount = 0;         // number of steps the motor has taken
+
+void setup() {
+  // initialize the serial port:
+  Serial.begin(9600);
+}
+
+void loop() {
+  // step one step:
+  myStepper.step(1);
+  Serial.print("steps:" );
+  Serial.println(stepCount);
+  stepCount++;
+  delay(500);
+}
+