from time import sleep, ticks_ms, ticks_diff
from machine import Pin

BUTTON = Pin(0, Pin.IN)

TIMER = ticks_ms()

def click(pin):
    global TIMER
    if pin.value() == 1:
        TIMER = ticks_ms()
    else:
        counter = ticks_diff(ticks_ms(), TIMER)
        print(counter)

BUTTON.irq(handler=click, trigger=Pin.IRQ_FALLING | Pin.IRQ_RISING)

while True:
    print(".")
    sleep(0.5)


"""
from time import sleep, ticks_ms, ticks_diff
from machine import Pin

BUTTON = Pin(0, Pin.IN)

TIMER = ticks_ms()

def on_click(pin):
    global TIMER
    TIMER = ticks_ms()
    print("onClick")

def on_release(pin):
    global TIMER
    counter = ticks_diff(ticks_ms(), TIMER)
    print(counter)

BUTTON.irq(handler=on_click, trigger=Pin.IRQ_RISING)
BUTTON.irq(handler=on_release, trigger=Pin.IRQ_FALLING)

while True:
    print(".")
    sleep(0.5)
"""