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Use of Timer

For detailed introduction of Timer, please refer to Timer-API Document.

1. Instructions#

  • Import Timer module from machine
from machine import Timer
  • Create a Timer object
def on_timer(timer):
    print("time up:",timer)
    print("param:",timer.callback_arg())

tim = Timer(Timer.TIMER0, Timer.CHANNEL0, mode=Timer.MODE_PERIODIC, period=1, unit=Timer.UNIT_S, callback=on_timer, arg=on_timer, start=False, priority=1, div=0)
  • Start the timer, at this time the timer will execute the callback function regularly
tim.start()
  • Stop the timer
tim.stop()

2. Example#

Execute callback function regularly

from machine import Timer

def on_timer(timer):
    print("time up:",timer)
    print("param:",timer.callback_arg())

tim = Timer(Timer.TIMER0, Timer.CHANNEL0, mode=Timer.MODE_PERIODIC, period=1, unit=Timer.UNIT_S, callback=on_timer, arg=on_timer, start=False, priority=1, div=0)

print("period:",tim.period())

tim.start()
time.sleep(5)
tim.stop()
time.sleep(5)
tim.restart()
time.sleep(5)
tim.stop()
del tim

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