'''
import micropython
from machine import Pin
import time

micropython.alloc_emergency_exception_buf(100)
class Foo(object):
    def __init__(self, timer, led):
        self.led = led
        timer.callback(self.cb)
    def cb(self, tim):
        self.led.toggle()

red = Foo(pyb.Timer(4, freq=1), pyb.LED(1))
green = Foo(pyb.Timer(2, freq=0.8), pyb.LED(2))
'''

# Class Blink LED
from machine import Pin
from time import ticks_ms

class Blinker:
    def __init__(self, pinLED, timeLedOn, timeLedOff):
        self._pinLED = Pin(pinLED, Pin.OUT)  #Pin(pinLED, mode=Pin.IN, pull=Pin.PULL_DOWN)
        self._timeLedOn = timeLedOn
        self._timeLedOff = timeLedOff
        self._ledState = False
        self._nextChangeTime = 0
        
    def toggle(self):
        currentTime = ticks_ms()
        #print('currentTime {}'.format(currentTime))
        #print('nextChangeTime {}'.format(self._nextChangeTime))
        #print('ledState {}'.format(self._ledState))
        if currentTime >= self._nextChangeTime:
            if self._ledState == True:
                self._ledState = False
                self._nextChangeTime = currentTime + self._timeLedOff
            else:
                self._ledState = True
                self._nextChangeTime = currentTime + self._timeLedOn
            self._pinLED.value(self._ledState)

led1 = Blinker(2, 1000, 1000)
led2 = Blinker(4, 200, 200)
while True:
    led1.toggle()
    led2.toggle()