DC Motor for Raspberry Pi

dcmotor.py

import RPi.GPIO as GPIO
import datetime as dt

class motor():
	x = 0
	v = 0.87654321
	def __init__(self):
		GPIO.setmode(GPIO.BOARD)
		GPIO.setup(7, GPIO.OUT, initial=GPIO.HIGH)
		GPIO.setup(11, GPIO.OUT, initial=GPIO.HIGH)

	def cw(self):
		GPIO.output(7, GPIO.LOW)
		GPIO.output(11, GPIO.HIGH)

	def ccw(self):
		GPIO.output(7, GPIO.HIGH)
		GPIO.output(11, GPIO.LOW)

	def stopRot(self):
		GPIO.output(7, GPIO.HIGH)
		GPIO.output(11, GPIO.HIGH)

	def forward(self, length):
		#Naive check
		if(length >= 25):
			print("Can not exceed axis length")

		#Calculate the time it takes to reach given distance
		t = length/self.v

		start = dt.datetime.now()
		self.ccw()
		while True:
			if((dt.datetime.now()-start).total_seconds() >= t):
				self.stopRot()
				break

	def goto(self, s):
		#Smarter check
		if( s >= 25):
			print("Can not exceed 24 cm")
			s = 24
		elif (s < 0):
			print("Please give only positive values")
			s = 0

		length = s - self.x
		self.x = s

		if(length > 0):
			print("Going forward by", abs(length), " cm")
			self.forward(length)
		elif(length < 0):
			print("Going backwards by", abs(length), " cm")
			self.backwards(length)

GPIO.cleanup()