original RPi.GPIO code, branch setup

Raspberry_Pi_Stepper_Motors/README.md

@@ -0,0 +1,4 @@
+# Raspberry_Pi_Stepper_Motors
+
+Code to accompany this tutorial:
+https://learn.adafruit.com/adafruits-raspberry-pi-lesson-10-stepper-motors

Raspberry_Pi_Stepper_Motors/Raspberry_Pi_Stepper_Motors.py

@@ -0,0 +1,54 @@
+import RPi.GPIO as GPIO
+import time
+
+GPIO.setmode(GPIO.BCM)
+
+enable_pin = 18
+coil_A_1_pin = 4
+coil_A_2_pin = 17
+coil_B_1_pin = 23
+coil_B_2_pin = 24
+
+GPIO.setup(enable_pin, GPIO.OUT)
+GPIO.setup(coil_A_1_pin, GPIO.OUT)
+GPIO.setup(coil_A_2_pin, GPIO.OUT)
+GPIO.setup(coil_B_1_pin, GPIO.OUT)
+GPIO.setup(coil_B_2_pin, GPIO.OUT)
+
+GPIO.output(enable_pin, 1)
+
+def forward(delay, steps):  
+  for i in range(0, steps):
+    setStep(1, 0, 1, 0)
+    time.sleep(delay)
+    setStep(0, 1, 1, 0)
+    time.sleep(delay)
+    setStep(0, 1, 0, 1)
+    time.sleep(delay)
+    setStep(1, 0, 0, 1)
+    time.sleep(delay)
+
+def backwards(delay, steps):  
+  for i in range(0, steps):
+    setStep(1, 0, 0, 1)
+    time.sleep(delay)
+    setStep(0, 1, 0, 1)
+    time.sleep(delay)
+    setStep(0, 1, 1, 0)
+    time.sleep(delay)
+    setStep(1, 0, 1, 0)
+    time.sleep(delay)
+
+  
+def setStep(w1, w2, w3, w4):
+  GPIO.output(coil_A_1_pin, w1)
+  GPIO.output(coil_A_2_pin, w2)
+  GPIO.output(coil_B_1_pin, w3)
+  GPIO.output(coil_B_2_pin, w4)
+
+while True:
+  delay = raw_input("Delay between steps (milliseconds)?")
+  steps = raw_input("How many steps forward? ")
+  forward(int(delay) / 1000.0, int(steps))
+  steps = raw_input("How many steps backwards? ")
+  backwards(int(delay) / 1000.0, int(steps))