Micropython Asyncio example

main.py

import uasyncio as asyncio
from machine import Pin, PWM
from encoder import Encoder
from time import sleep_us, sleep_ms


button = Pin(14, Pin.IN, Pin.PULL_UP)

class LedStripController:
    def __init__(self, enc, pwm):
        self.encoder = enc
        self.led_pwm = pwm
        self.to_brightness = 0 # Percentage brightness. 0 = off
        self.on = False # State of the LED strip
        self.pressed = False # Has the button been pressed?

    async def switch_loop(self):
        while True:
            if self.pressed:
                self.to_brightness = 0 if self.on else 100
                await asyncio.sleep_ms(50) # Debounce
                self.pressed = False
                self.on = not self.on
                print('Button pushed, {}'.format(self.on))
            await asyncio.sleep_ms(100)

    async def encoder_loop(self):
        while True:
            val = self.encoder.value
            self.encoder.cur_accel = max(0, self.encoder.cur_accel - self.encoder.accel)
            if self.to_brightness != val:
                print(val)
                self.to_brightness = val
            await asyncio.sleep_ms(100)

    def press_button(self, _):
        self.pressed = True


def main(enc):
    global button
    pwm = PWM(Pin(15))
    controller = LedStripController(enc, pwm)
    button.irq(trigger=Pin.IRQ_FALLING, handler=controller.press_button)
    loop = asyncio.get_event_loop()
    loop.create_task(controller.switch_loop())
    #loop.create_task(encoder_loop(enc))
    #try:
    loop.run_until_complete(controller.encoder_loop())
    #except:
    #    enc.close()


enc = Encoder(pin_clk=13, pin_dt=12, pin_mode=Pin.PULL_UP,
              min_val=4, max_val=100, clicks=1, accel=2)
enc._value = 100
main(enc)