Async PIO Counter

import adafruit_pioasm
import rp2pio
import time
import array
import board

counter = """
.side_set 1 opt
    set y, 0
    mov y, !y
    in y,32         ; just to calm circuitpython: "RuntimeError: No in in program"
.wrap_target
loop:
    wait 1 pin 0    side 0
    wait 0 pin 0    side 1
    jmp y-- loop
"""

in_str = """
    in y, 32
"""

asm = adafruit_pioasm.assemble(counter)
in_asm = adafruit_pioasm.assemble(in_str)

sm = rp2pio.StateMachine(
    program=asm,
    frequency=125000000,
    first_sideset_pin=board.LED,
    sideset_enable=True,

    #INPUT
    first_in_pin=board.GP0,
    in_pin_count=1,
    pull_in_pin_up=1,

    auto_push=True,
    wrap_target = 3
)

for i in range(10):
    sm.run(in_asm)

    #while sm.in_waiting: #WTF? sm.in_waiting is allways 8 !!
    if True:
        print(sm.in_waiting, end=" ")
        buffer = array.array('L', [0])
        sm.readinto(buffer)
        print(buffer)
    time.sleep(1)

time.sleep(50)