0302cd65e8
This is not part of the common machine API. It's dropped on the mimxrt port and kept only on the cc3200 port for legacy. Also show the port availability of `RTC.now()` in the documentation. Signed-off-by: robert-hh <robert@hammelrath.com>
104 lines
2.8 KiB
ReStructuredText
104 lines
2.8 KiB
ReStructuredText
.. currentmodule:: machine
|
|
.. _machine.RTC:
|
|
|
|
class RTC -- real time clock
|
|
============================
|
|
|
|
The RTC is an independent clock that keeps track of the date
|
|
and time.
|
|
|
|
Example usage::
|
|
|
|
rtc = machine.RTC()
|
|
rtc.datetime((2020, 1, 21, 2, 10, 32, 36, 0))
|
|
print(rtc.datetime())
|
|
|
|
|
|
Constructors
|
|
------------
|
|
|
|
.. class:: RTC(id=0, ...)
|
|
|
|
Create an RTC object. See init for parameters of initialization.
|
|
|
|
Methods
|
|
-------
|
|
|
|
.. method:: RTC.datetime([datetimetuple])
|
|
|
|
Get or set the date and time of the RTC.
|
|
|
|
With no arguments, this method returns an 8-tuple with the current
|
|
date and time. With 1 argument (being an 8-tuple) it sets the date
|
|
and time.
|
|
|
|
The 8-tuple has the following format:
|
|
|
|
(year, month, day, weekday, hours, minutes, seconds, subseconds)
|
|
|
|
The meaning of the ``subseconds`` field is hardware dependent.
|
|
|
|
.. method:: RTC.init(datetime)
|
|
|
|
Initialise the RTC. Datetime is a tuple of the form:
|
|
|
|
``(year, month, day[, hour[, minute[, second[, microsecond[, tzinfo]]]]])``
|
|
|
|
.. method:: RTC.now()
|
|
|
|
Get get the current datetime tuple.
|
|
|
|
Availability: WiPy.
|
|
|
|
.. method:: RTC.deinit()
|
|
|
|
Resets the RTC to the time of January 1, 2015 and starts running it again.
|
|
|
|
.. method:: RTC.alarm(id, time, *, repeat=False)
|
|
|
|
Set the RTC alarm. Time might be either a millisecond value to program the alarm to
|
|
current time + time_in_ms in the future, or a datetimetuple. If the time passed is in
|
|
milliseconds, repeat can be set to ``True`` to make the alarm periodic.
|
|
|
|
.. method:: RTC.alarm_left(alarm_id=0)
|
|
|
|
Get the number of milliseconds left before the alarm expires.
|
|
|
|
.. method:: RTC.alarm_cancel(alarm_id=0)
|
|
|
|
Cancel a running alarm.
|
|
|
|
The mimxrt port also exposes this function as ``RTC.cancel(alarm_id=0)``, but this is
|
|
scheduled to be removed in MicroPython 2.0.
|
|
|
|
.. method:: RTC.irq(*, trigger, handler=None, wake=machine.IDLE)
|
|
|
|
Create an irq object triggered by a real time clock alarm.
|
|
|
|
- ``trigger`` must be ``RTC.ALARM0``
|
|
- ``handler`` is the function to be called when the callback is triggered.
|
|
- ``wake`` specifies the sleep mode from where this interrupt can wake
|
|
up the system.
|
|
|
|
.. method:: RTC.memory([data])
|
|
|
|
``RTC.memory(data)`` will write *data* to the RTC memory, where *data* is any
|
|
object which supports the buffer protocol (including `bytes`, `bytearray`,
|
|
`memoryview` and `array.array`). ``RTC.memory()`` reads RTC memory and returns
|
|
a `bytes` object.
|
|
|
|
Data written to RTC user memory is persistent across restarts, including
|
|
:ref:`soft_reset` and `machine.deepsleep()`.
|
|
|
|
The maximum length of RTC user memory is 2048 bytes by default on esp32,
|
|
and 492 bytes on esp8266.
|
|
|
|
Availability: esp32, esp8266 ports.
|
|
|
|
Constants
|
|
---------
|
|
|
|
.. data:: RTC.ALARM0
|
|
|
|
irq trigger source
|