69 lines
1.6 KiB
ReStructuredText
69 lines
1.6 KiB
ReStructuredText
.. _machine.RTC:
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class RTC -- real time clock
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============================
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The RTC is and independent clock that keeps track of the date
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and time.
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Example usage::
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rtc = machine.RTC()
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rtc.init((2014, 5, 1, 4, 13, 0, 0, 0))
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print(rtc.now())
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Constructors
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------------
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.. class:: machine.RTC(id=0, ...)
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Create an RTC object. See init for parameters of initialization.
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Methods
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-------
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.. method:: rtc.init(datetime)
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Initialise the RTC. Datetime is a tuple of the form:
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``(year, month, day[, hour[, minute[, second[, microsecond[, tzinfo]]]]])``
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.. method:: rtc.now()
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Get get the current datetime tuple.
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.. method:: rtc.deinit()
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Resets the RTC to the time of January 1, 2015 and starts running it again.
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.. method:: rtc.alarm(id, time, /*, repeat=False)
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Set the RTC alarm. Time might be either a milllisecond value to program the alarm to
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current time + time_in_ms in the future, or a datetimetuple. If the time passed is in
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milliseconds, repeat can be set to ``True`` to make the alarm periodic.
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.. method:: rtc.alarm_left(alarm_id=0)
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Get the number of milliseconds left before the alarm expires.
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.. method:: rtc.cancel(alarm_id=0)
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Cancel a running alarm.
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.. method:: rtc.irq(\*, trigger, handler=None, wake=machine.IDLE)
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Create an irq object triggered by a real time clock alarm.
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- ``trigger`` must be ``RTC.ALARM0``
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- ``handler`` is the function to be called when the callback is triggered.
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- ``wake`` specifies the sleep mode from where this interrupt can wake
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up the system.
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Constants
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---------
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.. data:: RTC.ALARM0
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irq trigger source
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