Timer(定时器) 的使用

关于 Timer 详细介绍请参考Timer-API 文档.

1. 使用方法

  • 从 machine 导入 Timer 模块
from machine import Timer
  • 创建 Timer 对象
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)
  • 启动定时器, 此时定时器将定时执行回调函数
tim.start()
  • 停止定时器
tim.stop()

2. 示例

定时执行回调函数

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
powered by GitbookFile Modify: 2021-02-03 10:26:57

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