<sxh [py][; options for SyntaxHighlighter]> #!/usr/bin/python # Written in Python 2.7
# Import required libraries import sys import time import RPi.GPIO as GPIO
# Use BCM GPIO references # instead of physical pin numbers GPIO.setmode(GPIO.BCM)
# Define GPIO signals to use # Physical pins 6,13,19,26 StepPins = [6,13,19,26]
# Set all pins as output for pin in StepPins:
print "Setup pins" GPIO.setup(pin,GPIO.OUT) GPIO.output(pin, False)
Seq = 1,0,0,0], [1,1,0,0], [0,1,0,0], [0,1,1,0], [0,0,1,0], [0,0,1,1], [0,0,0,1], [1,0,0,1
StepCount = len(Seq) StepDir = 1 # Set to 1 or 2 for clockwise
# Set to -1 or -2 for anti-clockwise
# Read wait time from command line if len(sys.argv)>1:
WaitTime = int(sys.argv[1])/float(1000)
else:
WaitTime = 10/float(1000)
# Initialise variables StepCounter = 0
# Start main loop while True:
# print StepCounter, # print Seq[StepCounter]
for pin in range(0,4): xpin=StepPins[pin]# Get GPIO if Seq[StepCounter][pin]!=0:
# print “ Enable GPIO %i” %(xpin)
GPIO.output(xpin, True)
else:
GPIO.output(xpin, False)
StepCounter += StepDir
# If we reach the end of the sequence # start again if (StepCounter>=StepCount): StepCounter = 0 if (StepCounter<0): StepCounter = StepCount+StepDir
# Wait before moving on time.sleep(WaitTime)
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