from machine import I2C, Pin
from esp8266_i2c_lcd import I2cLcd
import time
_init()

DEFAULT_I2C_ADDR = 0x3F # Или 0x27 в зависимости от модели микросхемы на плате

encA = Pin(13, Pin.IN)
encB = Pin(12, Pin.IN)

count = 0

states = (
    (1,1),
    (0,1),
    (0,0),
    (1,0)
)

old_state = 0

def print_lcd(data):
    lcd.clear()
    lcd.putstr(str(data))

def callback(p):
    global count
    global encB
    global encA
    global states
    global old_state

    value_a = encA.value()
    value_b = encB.value()

    current_state = states.index((value_a, value_b))
    
    if (current_state -  old_state == 1) or (current_state == 0 and old_state == 3):
        count += 1
        if not (count % 2):
            print('+');
            print_lcd(int(count/2))
        old_state = current_state
    elif (current_state -  old_state == -1)  or (current_state == 3 and old_state == 0):
        count -= 1
        if not (count % 2):
            print('-');
            print_lcd(int(count/2))
        old_state = current_state


i2c = I2C(scl=Pin(5), sda=Pin(4), freq=400000)
lcd = I2cLcd(i2c, DEFAULT_I2C_ADDR, 2, 16)
lcd.backlight_on()

encA.irq(trigger=Pin.IRQ_FALLING | Pin.IRQ_RISING, handler=callback)
encB.irq(trigger=Pin.IRQ_FALLING | Pin.IRQ_RISING, handler=callback)


while True:
    pass