Started following some tutorial on att85 usi. Downloaded example code from make avr book.

Make AVR Examples/Chapter15_Advanced-Motors/stepperWorkout/half_stepping.h

@@ -0,0 +1,17 @@
+
+// Include file for half-stepping order
+// You may need to change the software pinouts around to match your motor
+//   or change your motor connections around to match the software.
+
+const uint8_t stepOrder[] = {
+  (1 << PB0) | (1 << PB2),
+  (1 << PB0),
+  (1 << PB0) | (1 << PB3),
+  (1 << PB3),
+  (1 << PB1) | (1 << PB3),
+  (1 << PB1),
+  (1 << PB1) | (1 << PB2),
+  (1 << PB2)
+};
+
+#define LAST_PHASE_IN_CYCLE  7