working w/o PN on 28byj-48 with uln2003 driver board

1 files changed, 91 insertions, 0 deletions

diff --git a/python/examples/pnStepper.py b/python/examples/pnStepper.py
new file mode 100644
index 0000000..2f8d747
--- /dev/null
+++ b/python/examples/pnStepper.py
@@ -0,0 +1,91 @@
+#-----------------------------------
+# Name: Stepper Motor
+#
+# Author: matt.hawkins
+#
+# Created: 11/07/2012
+# Copyright: (c) matt.hawkins 2012
+#-----------------------------------
+#!/usr/bin/env python
+ 
+# Import required libraries
+import time
+import RPi.GPIO as GPIO
+ 
+# Use BCM GPIO references
+# instead of physical pin numbers
+GPIO.setmode(GPIO.BOARD)
+ 
+# Define GPIO signals to use
+# Pins 19,22,24,26
+# GPIO10,GPIO25,GPIO8,GPIO7
+StepPins = [26,24,22,19]
+ 
+# Set all pins as output
+for pin in StepPins:
+  print "Setup pins"
+  GPIO.setup(pin,GPIO.OUT)
+  GPIO.output(pin, False)
+ 
+# Define some settings
+StepCounter = 0
+WaitTime = 0.002
+ 
+# Define simple sequence
+StepCount1 = 4
+Seq1 = []
+Seq1 = range(0, StepCount1)
+
+Seq1[0] = [1,0,0,0]
+Seq1[1] = [0,1,0,0]
+Seq1[2] = [0,0,1,0]
+Seq1[3] = [0,0,0,1]
+
+Seq1[3] = [1,0,0,0]
+Seq1[2] = [0,1,0,0]
+Seq1[1] = [0,0,1,0]
+Seq1[0] = [0,0,0,1]
+ 
+# Define advanced sequence
+# as shown in manufacturers datasheet
+StepCount2 = 8
+Seq2 = []
+Seq2 = range(0, StepCount2)
+Seq2[0] = [1,0,0,0]
+Seq2[1] = [1,1,0,0]
+Seq2[2] = [0,1,0,0]
+Seq2[3] = [0,1,1,0]
+Seq2[4] = [0,0,1,0]
+Seq2[5] = [0,0,1,1]
+Seq2[6] = [0,0,0,1]
+Seq2[7] = [1,0,0,1]
+ 
+# Choose a sequence to use
+Seq = Seq1
+StepCount = StepCount1
+ 
+# Start main loop
+while 1==1:
+ 
+  for pin in range(0, 4):
+    xpin = StepPins[pin]
+
+    pinVal = Seq[StepCounter][pin]
+
+    if pinVal!=0:
+      print " Step %i Enable %i" %(StepCounter,xpin)
+      GPIO.output(xpin, True)
+    else:
+      GPIO.output(xpin, False)
+ 
+  StepCounter += 1
+ 
+  # If we reach the end of the sequence
+  # start again
+  if (StepCounter==StepCount):
+    StepCounter = 0
+  if (StepCounter<0):
+    StepCounter = StepCount
+ 
+  # Wait before moving on
+  time.sleep(WaitTime)