from machine import Pin, Timer
from stepper import Stepper

motor = Stepper([9,8,7,6])

greenL = Pin(15, Pin.OUT)
redL = Pin(14, Pin.OUT)

toggleB = Pin(19, Pin.IN, Pin.PULL_DOWN)
closedB = Pin(20, Pin.IN, Pin.PULL_DOWN)
openedB = Pin(21, Pin.IN, Pin.PULL_DOWN)

isOpen = False
isChanging = False

if (openedB.value()):
  isOpen = True

def onToggle(pin):
  global isChanging
  if (isChanging == False):
    motor.start(not isOpen)
    isChanging = True

def onOpen(pin):
  global isOpen
  global isChanging
  if (isOpen == False):
    motor.stop()
    isChanging = False
    isOpen = True

def onClose(pin):
  global isOpen
  global isChanging
  if (isOpen):
    motor.stop()
    isChanging = False
    isOpen = False

toggleB.irq(trigger=Pin.IRQ_RISING, handler=onToggle)
openedB.irq(trigger=Pin.IRQ_RISING, handler=onOpen)
closedB.irq(trigger=Pin.IRQ_RISING, handler=onClose)

def leds(timer):
  if (isChanging):
    if (isOpen):
      redL.toggle()
      greenL.off()
    else:
      greenL.toggle()
      redL.off()
  else:
    if (isOpen):
      greenL.on()
      redL.off()
    else:
      redL.on()
      greenL.off()

ledT = Timer()
ledT.init(freq=2.5, mode=Timer.PERIODIC, callback=leds)


main.py

diagram.json

from machine import Pin, Timer

sequence = [
  [0, 0, 0, 1],
  [0, 0, 1, 1],
  [0, 0, 1, 0],
  [0, 1, 1, 0],
  [0, 1, 0, 0],
  [1, 1, 0, 0],
  [1, 0, 0, 0],
  [1, 0, 0, 1]
]

class Stepper:
  timer = Timer()
  index = 0
  direction = 1

  def __init__(self, pinNums):
    self.pins = list(map(lambda p : Pin(p, Pin.OUT), pinNums))

  def step(self, timer):
    for pIndex in range(len(self.pins)):
      pValue = sequence[self.index][pIndex]
      self.pins[pIndex].value(pValue)
    self.index = (self.index + self.direction) % len(sequence)

  def start(self, clockwise):
    self.direction = 1 if clockwise else -1;
    self.timer.init(period=1, mode=Timer.PERIODIC, callback=self.step)

  def stop(self):
    self.timer.deinit()
    for pin in self.pins:
        pin.value(0)

