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    Basic DC motor control robot code – Raspberry Pi

    9th December 2014

    Raspberry-Pi

    Raspberrypi - Codehaven

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    # left forward 18
    # left backward 22
    # right forward 17
    # right forward 23
     
    # Let's import the modules we will need!
    import time
    import RPi.GPIO as GPIO
    # Next we setup the pins for use!
    GPIO.setmode(GPIO.BCM)
    GPIO.setwarnings(False)
    GPIO.setup(23,GPIO.OUT)
    GPIO.setup(17,GPIO.OUT)
    GPIO.setup(22,GPIO.OUT)
    GPIO.setup(18,GPIO.OUT)
    print('Starting motor sequence!')
     
     
    def forward():
    GPIO.output(18, False)
    GPIO.output(22, False)
    GPIO.output(23, True)
    GPIO.output(17, True)
    time.sleep(1)
    def backward():
    GPIO.output(23, False)
    GPIO.output(17, False)
    GPIO.output(18, True)
    GPIO.output(22, True)
    time.sleep(1)
     
    def turnleft():
    GPIO.output(23, False)
    GPIO.output(17, True)
    GPIO.output(18, True)
    GPIO.output(22, False)
    time.sleep(0.5)
    def turnright():
    GPIO.output(23, True)
    GPIO.output(17, False)
    GPIO.output(18, False)
    GPIO.output(22, True)
    time.sleep(0.5)
     
    def stop():
    GPIO.output(23, False)
    GPIO.output(17, False)
    GPIO.output(22, False)
    GPIO.output(18, False)
     
    while True:
    try:
    choice = input("INPUT..")
    if choice == 1:
            print "Going Forwards"
            forward()
            stop()
            
    elif choice == 2:
            print ("Going Backwards")
            backward()
            stop()
     
    elif choice == 3:
            print ("Turn Left")
            turnleft()
            stop()
     
    elif choice == 4:
            print ("Turn Right")
            turnright()
            stop()
     
     
    except(KeyboardInterrupt):
    # If a keyboard interrupt is detected then it exits cleanly!
    print('Finishing up!')
    GPIO.output(23, False)
    GPIO.output(17, False)
    GPIO.output(22, False)
    GPIO.output(18, False)
    quit()
     

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