Support generic drivers for Stepper library

libraries/Stepper/examples/stepper_oneRevolution_28BYJ48_ULN2003/stepper_oneRevolution_28BYJ48_ULN2003.ino

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+/*
+ Stepper Motor Control - one revolution
+
+ This program drives a unipolar or bipolar stepper motor.
+ The motor is attached to digital pins 8 - 11 of the Arduino.
+
+ The motor should revolve one revolution in one direction, then
+ one revolution in the other direction.
+
+
+ Created 11 Mar. 2007
+ Modified 30 Nov. 2009
+ by Tom Igoe
+
+ Example adapted for the combination of Motor 28BYJ-48 and driver ULN2003
+ see http://www.amazon.de/gp/product/B00ATA5MFE?keywords=ULN2003%2028BYJ48
+ Modified 05 Dec. 2015
+ by Stanislav Kniazev
+
+ */
+
+#include <Stepper.h>
+// Motor 28BYJ-48 has 4096 steps per one revolution
+const int stepsPerRevolution = 4096;  // change this to fit the number of steps per revolution for your motor
+
+/* Custom phase matrix for driver ULN2003.
+ * The sequence of control signals for 8 phases, 4 control wires is as follows:
+ * Step C0 C1 C2 C3
+ *    1  0  0  0  1
+ *    2  0  0  1  1
+ *    3  0  0  1  0
+ *    4  0  1  1  0
+ *    5  0  1  0  0
+ *    6  1  1  0  0
+ *    7  1  0  0  0
+ *    8  1  0  0  1
+ */
+const unsigned char phasesMatrix[8] PROGMEM = {
+  0b0001,
+  0b0011,
+  0b0010,
+  0b0110,
+  0b0100,
+  0b1100,
+  0b1000,
+  0b1001
+  };
+
+//initialize the stepper library on pins 8 through 11, phasesMatrix, pin_count, phase_count:
+Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11, (unsigned char*)phasesMatrix, 8);
+
+void setup() {
+  // 17 is the maximum for counterclockwise revolution of motor 28BYJ-48
+  // set the speed at 17 rpm:
+  myStepper.setSpeed(17);
+  // initialize the serial port:
+  Serial.begin(9600);
+}
+
+void loop() {
+  // step one revolution  in one direction:
+  Serial.println("clockwise");
+  myStepper.step(stepsPerRevolution);
+  delay(500);
+
+  // step one revolution in the other direction:
+  Serial.println("counterclockwise");
+  myStepper.step(-stepsPerRevolution);
+  delay(500);
+}
+