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adafruit-circuitpython-pcf8523-1.5.9
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مشاهده بیشترتوضیحات
CircuitPython library for PCF8523 real time clock.
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | adafruit-circuitpython-pcf8523-1.5.9 |
| نام | adafruit-circuitpython-pcf8523 |
| نسخه کتابخانه | 1.5.9 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | - |
| ایمیل نویسنده | Adafruit Industries <circuitpython@adafruit.com> |
| آدرس صفحه اصلی | - |
| آدرس اینترنتی | https://pypi.org/project/adafruit-circuitpython-pcf8523/ |
| مجوز | MIT |
Introduction to Adafruit's PCF8523 Real Time Clock (RTC) Library
================================================================
.. image:: https://readthedocs.org/projects/adafruit-circuitpython-pcf8523/badge/?version=latest
:target: https://docs.circuitpython.org/projects/pcf8523/en/latest/
:alt: Documentation Status
.. image:: https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_Bundle/main/badges/adafruit_discord.svg
:target: https://adafru.it/discord
:alt: Discord
.. image:: https://github.com/adafruit/Adafruit_CircuitPython_PCF8523/workflows/Build%20CI/badge.svg
:target: https://github.com/adafruit/Adafruit_CircuitPython_PCF8523/actions/
:alt: Build Status
.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/psf/black
:alt: Code Style: Black
This is a great battery-backed real time clock (RTC) that allows your
microcontroller project to keep track of time even if it is reprogrammed,
or if the power is lost. Perfect for datalogging, clock-building, time
stamping, timers and alarms, etc. Equipped with PCF8523 RTC - it can
run from 3.3V or 5V power & logic!
The PCF8523 is simple and inexpensive but not a high precision device.
It may lose or gain up to two seconds a day. For a high-precision,
temperature compensated alternative, please check out the
`DS3231 precision RTC. <https://www.adafruit.com/products/3013>`_
If you need a DS1307 for compatibility reasons, check out our
`DS1307 RTC breakout <https://www.adafruit.com/products/3296>`_.
.. image:: _static/3295-00.jpg
:alt: PCF8523 Breakout Board
Dependencies
=============
This driver depends on the `Register <https://github.com/adafruit/Adafruit_CircuitPython_Register>`_
and `Bus Device <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>`_
libraries. Please ensure they are also available on the CircuitPython filesystem.
This is easily achieved by downloading
`a library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_.
Installing from PyPI
====================
On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
PyPI <https://pypi.org/project/adafruit-circuitpython-pcf8523/>`_. To install for current user:
.. code-block:: shell
pip3 install adafruit-circuitpython-pcf8523
To install system-wide (this may be required in some cases):
.. code-block:: shell
sudo pip3 install adafruit-circuitpython-pcf8523
To install in a virtual environment in your current project:
.. code-block:: shell
mkdir project-name && cd project-name
python3 -m venv .venv
source .venv/bin/activate
pip3 install adafruit-circuitpython-pcf8523
Usage Notes
===========
Basics
------
Of course, you must import the library to use it:
.. code:: python3
import time
import adafruit_pcf8523
All the Adafruit RTC libraries take an instantiated and active I2C object
(from the `board` library) as an argument to their constructor. The way to
create an I2C object depends on the board you are using. For boards with labeled
SCL and SDA pins, you can:
.. code:: python3
import board
Now, to initialize the I2C bus:
.. code:: python3
i2c = board.I2C()
Once you have created the I2C interface object, you can use it to instantiate
the RTC object:
.. code:: python3
rtc = adafruit_pcf8523.PCF8523(i2c)
Date and time
-------------
To set the time, you need to set datetime` to a `time.struct_time` object:
.. code:: python3
rtc.datetime = time.struct_time((2017,1,9,15,6,0,0,9,-1))
After the RTC is set, you retrieve the time by reading the `datetime`
attribute and access the standard attributes of a struct_time such as ``tm_year``,
``tm_hour`` and ``tm_min``.
.. code:: python3
t = rtc.datetime
print(t)
print(t.tm_hour, t.tm_min)
Alarm
-----
To set the time, you need to set `alarm` to a tuple with a `time.struct_time`
object and string representing the frequency such as "hourly":
.. code:: python3
rtc.alarm = (time.struct_time((2017,1,9,15,6,0,0,9,-1)), "daily")
After the RTC is set, you retrieve the alarm status by reading the
`alarm_status` attribute. Once True, set it back to False to reset.
.. code:: python3
if rtc.alarm_status:
print("wake up!")
rtc.alarm_status = False
Documentation
=============
API documentation for this library can be found on `Read the Docs <https://docs.circuitpython.org/projects/pcf8523/en/latest/>`_.
For information on building library documentation, please check out `this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>`_.
Contributing
============
Contributions are welcome! Please read our `Code of Conduct
<https://github.com/adafruit/Adafruit_CircuitPython_PCF8523/blob/main/CODE_OF_CONDUCT.md>`_
before contributing to help this project stay welcoming.
نیازمندی
| مقدار | نام |
|---|---|
| - | Adafruit-Blinka |
| - | adafruit-circuitpython-register |
| - | adafruit-circuitpython-busdevice |
نحوه نصب
نصب پکیج whl adafruit-circuitpython-pcf8523-1.5.9:
pip install adafruit-circuitpython-pcf8523-1.5.9.whl
نصب پکیج tar.gz adafruit-circuitpython-pcf8523-1.5.9:
pip install adafruit-circuitpython-pcf8523-1.5.9.tar.gz