Run DC Motor

1. Connect the Arduino board to the carrier with the correct direction
2. Connect the dc motor with gear to carrier:

3. Ensure the toggle on the carrier is at "off" side
4. Plug in the usb port -> We should see green light on Arduino board and orange light on carrier
5. Turn on the toggle
6. a = arduino() to initialize the Arduino board
7. carrier = motorCarrier(a) to initialize the carrier
8. dcm = dcmotor(carrier, "M1") to assign the dc motor at M1 port to dcm
9. dcm.start() to start the controller, the motor will not be triggered because the speed is 0
10. dcm.Speed = 1 to assign a value (between -1 and 1) to speed
11. dcm.stop() to stop the controller
12. enc = rotaryEncoder(carrier,1) to initialize the encoder of the motor at port 1
13. readCount(enc) to read the encoder count buffer
    1. run readCount(enc) and get the value
    2. manually trun the magnatic disk full rotation
    3. run readCount(enc) and get the value again.
    4. the diff of 2 values will be 12. Which means every "1" value is 30 degree of rotation.
14. resetCount(enc) to reset