#!/micropython
# vim: fileencoding=utf-8: ts=4: sw=4: expandtab:
import sys
from machine import Timer, UART, lightsleep
from time import sleep_ms, ticks_add, ticks_diff, ticks_ms
if 1:   f = sys.stdout
if 0:   f = UART(0, 8*115200,8,None,1, tx=16,rx=17)
tim = Timer()
sleep_ms(3000)  # Warte auf's Terminalprogramm
tim.init(mode=Timer.PERIODIC, freq=10, callback=lambda _:print('X',file=f))
print('\nStart',file=f)
t_end = ticks_add(ticks_ms(), 2000)
while ticks_diff(ticks_ms(), t_end) < 0:
    lightsleep(0)
print('End\n',file=f)
tim.deinit()