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April 20, 2013 11:20
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raspberry pi stepper motor python script
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#----------------------------------- | |
# 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.BCM) | |
# Define GPIO signals to use | |
# Pins 18,22,24,26 | |
# GPIO24,GPIO25,GPIO8,GPIO7 | |
StepPins = [17,18,21,22] | |
# 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 = 0.01 | |
# 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] | |
# 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] | |
if Seq[StepCounter][pin]!=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) |
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