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# Author: peppe8o
# Blog: https://peppe8o.com
# Date: Oct 05th, 2024
# Version: 1.0

from machine import Pin

clk_pin = 16
dt_pin = 17
sw_pin = 18

clk_pin = Pin(clk_pin, Pin.IN, Pin.PULL_DOWN)
dt_pin = Pin(dt_pin, Pin.IN, Pin.PULL_DOWN)
sw_pin = Pin(sw_pin, Pin.IN, Pin.PULL_UP)

rot_log=[[1, 1]]

cw_path = [[1, 0], [0, 0], [0, 1], [1, 1]]
ccw_path = [[0, 1], [0, 0], [1, 0], [1, 1]]

counter = 0

def button_pressed(chn):
    global counter
    counter = 0
    print("Reset counter. New value: ",counter)
    return

def rotation_detected(chn):
    global last_log
    global rot_log
    global cw_path
    global ccw_path
    global counter
    
    last_log = [clk_pin.value(), dt_pin.value()]
    if last_log != rot_log[len(rot_log)-1]:
        rot_log.append(last_log)
        rot_log=rot_log[-len(cw_path):]
        if rot_log == cw_path:
            counter += 1
            print(counter)
        if rot_log == ccw_path:
            counter -= 1
            print(counter)
    return True

sw_pin.irq(trigger=Pin.IRQ_FALLING,handler=button_pressed)
clk_pin.irq(trigger=Pin.IRQ_RISING | Pin.IRQ_FALLING, handler=rotation_detected)
dt_pin.irq(trigger=Pin.IRQ_RISING | Pin.IRQ_FALLING, handler=rotation_detected)

while True:
    pass