circuitpython/tests/extmod/machine_timer.py

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# test machine.Timer
try:
import utime, umachine as machine
machine.Timer
except:
print("SKIP")
raise SystemExit
# create and deinit
t = machine.Timer(freq=1)
t.deinit()
# deinit again
t.deinit()
# create 2 and deinit
t = machine.Timer(freq=1)
t2 = machine.Timer(freq=1)
t.deinit()
t2.deinit()
# create 2 and deinit in different order
t = machine.Timer(freq=1)
t2 = machine.Timer(freq=1)
t2.deinit()
t.deinit()
# create one-shot timer with callback and wait for it to print (should be just once)
t = machine.Timer(period=1, mode=machine.Timer.ONE_SHOT, callback=lambda t: print("one-shot"))
utime.sleep_ms(5)
t.deinit()
# create periodic timer with callback and wait for it to print
t = machine.Timer(period=4, mode=machine.Timer.PERIODIC, callback=lambda t: print("periodic"))
utime.sleep_ms(14)
t.deinit()