├── .gitattributes ├── .github ├── PULL_REQUEST_TEMPLATE │ └── adafruit_circuitpython_pr.md └── workflows │ ├── build.yml │ ├── failure-help-text.yml │ ├── release_gh.yml │ └── release_pypi.yml ├── .gitignore ├── .pre-commit-config.yaml ├── .readthedocs.yaml ├── CODE_OF_CONDUCT.md ├── LICENSE ├── LICENSES ├── CC-BY-4.0.txt ├── CC-BY-SA-4.0.txt ├── MIT.txt └── Unlicense.txt ├── README.rst ├── README.rst.license ├── adafruit_ds3231.py ├── docs ├── _static │ ├── 3013-01.jpg │ ├── 3013-01.jpg.license │ ├── favicon.ico │ └── favicon.ico.license ├── api.rst ├── api.rst.license ├── conf.py ├── examples.rst ├── examples.rst.license ├── index.rst ├── index.rst.license └── requirements.txt ├── examples ├── ds3231_displayio_simpletest.py └── ds3231_simpletest.py ├── optional_requirements.txt ├── pyproject.toml ├── requirements.txt └── ruff.toml /.gitattributes: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2024 Justin Myers for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: Unlicense 4 | 5 | .py text eol=lf 6 | .rst text eol=lf 7 | .txt text eol=lf 8 | .yaml text eol=lf 9 | .toml text eol=lf 10 | .license text eol=lf 11 | .md text eol=lf 12 | -------------------------------------------------------------------------------- /.github/PULL_REQUEST_TEMPLATE/adafruit_circuitpython_pr.md: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2021 Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | 5 | Thank you for contributing! Before you submit a pull request, please read the following. 6 | 7 | Make sure any changes you're submitting are in line with the CircuitPython Design Guide, available here: https://docs.circuitpython.org/en/latest/docs/design_guide.html 8 | 9 | If your changes are to documentation, please verify that the documentation builds locally by following the steps found here: https://adafru.it/build-docs 10 | 11 | Before submitting the pull request, make sure you've run Pylint and Black locally on your code. You can do this manually or using pre-commit. Instructions are available here: https://adafru.it/check-your-code 12 | 13 | Please remove all of this text before submitting. Include an explanation or list of changes included in your PR, as well as, if applicable, a link to any related issues. 14 | -------------------------------------------------------------------------------- /.github/workflows/build.yml: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | 5 | name: Build CI 6 | 7 | on: [pull_request, push] 8 | 9 | jobs: 10 | test: 11 | runs-on: ubuntu-latest 12 | steps: 13 | - name: Run Build CI workflow 14 | uses: adafruit/workflows-circuitpython-libs/build@main 15 | -------------------------------------------------------------------------------- /.github/workflows/failure-help-text.yml: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2021 Scott Shawcroft for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | 5 | name: Failure help text 6 | 7 | on: 8 | workflow_run: 9 | workflows: ["Build CI"] 10 | types: 11 | - completed 12 | 13 | jobs: 14 | post-help: 15 | runs-on: ubuntu-latest 16 | if: ${{ github.event.workflow_run.conclusion == 'failure' && github.event.workflow_run.event == 'pull_request' }} 17 | steps: 18 | - name: Post comment to help 19 | uses: adafruit/circuitpython-action-library-ci-failed@v1 20 | -------------------------------------------------------------------------------- /.github/workflows/release_gh.yml: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | 5 | name: GitHub Release Actions 6 | 7 | on: 8 | release: 9 | types: [published] 10 | 11 | jobs: 12 | upload-release-assets: 13 | runs-on: ubuntu-latest 14 | steps: 15 | - name: Run GitHub Release CI workflow 16 | uses: adafruit/workflows-circuitpython-libs/release-gh@main 17 | with: 18 | github-token: ${{ secrets.GITHUB_TOKEN }} 19 | upload-url: ${{ github.event.release.upload_url }} 20 | -------------------------------------------------------------------------------- /.github/workflows/release_pypi.yml: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | 5 | name: PyPI Release Actions 6 | 7 | on: 8 | release: 9 | types: [published] 10 | 11 | jobs: 12 | upload-release-assets: 13 | runs-on: ubuntu-latest 14 | steps: 15 | - name: Run PyPI Release CI workflow 16 | uses: adafruit/workflows-circuitpython-libs/release-pypi@main 17 | with: 18 | pypi-username: ${{ secrets.pypi_username }} 19 | pypi-password: ${{ secrets.pypi_password }} 20 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2022 Kattni Rembor, written for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | 5 | # Do not include files and directories created by your personal work environment, such as the IDE 6 | # you use, except for those already listed here. Pull requests including changes to this file will 7 | # not be accepted. 8 | 9 | # This .gitignore file contains rules for files generated by working with CircuitPython libraries, 10 | # including building Sphinx, testing with pip, and creating a virual environment, as well as the 11 | # MacOS and IDE-specific files generated by using MacOS in general, or the PyCharm or VSCode IDEs. 12 | 13 | # If you find that there are files being generated on your machine that should not be included in 14 | # your git commit, you should create a .gitignore_global file on your computer to include the 15 | # files created by your personal setup. To do so, follow the two steps below. 16 | 17 | # First, create a file called .gitignore_global somewhere convenient for you, and add rules for 18 | # the files you want to exclude from git commits. 19 | 20 | # Second, configure Git to use the exclude file for all Git repositories by running the 21 | # following via commandline, replacing "path/to/your/" with the actual path to your newly created 22 | # .gitignore_global file: 23 | # git config --global core.excludesfile path/to/your/.gitignore_global 24 | 25 | # CircuitPython-specific files 26 | *.mpy 27 | 28 | # Python-specific files 29 | __pycache__ 30 | *.pyc 31 | 32 | # Sphinx build-specific files 33 | _build 34 | 35 | # This file results from running `pip -e install .` in a local repository 36 | *.egg-info 37 | 38 | # Virtual environment-specific files 39 | .env 40 | .venv 41 | 42 | # MacOS-specific files 43 | *.DS_Store 44 | 45 | # IDE-specific files 46 | .idea 47 | .vscode 48 | *~ 49 | -------------------------------------------------------------------------------- /.pre-commit-config.yaml: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2024 Justin Myers for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: Unlicense 4 | 5 | repos: 6 | - repo: https://github.com/pre-commit/pre-commit-hooks 7 | rev: v4.5.0 8 | hooks: 9 | - id: check-yaml 10 | - id: end-of-file-fixer 11 | - id: trailing-whitespace 12 | - repo: https://github.com/astral-sh/ruff-pre-commit 13 | rev: v0.3.4 14 | hooks: 15 | - id: ruff-format 16 | - id: ruff 17 | args: ["--fix"] 18 | - repo: https://github.com/fsfe/reuse-tool 19 | rev: v3.0.1 20 | hooks: 21 | - id: reuse 22 | -------------------------------------------------------------------------------- /.readthedocs.yaml: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: Unlicense 4 | 5 | # Read the Docs configuration file 6 | # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details 7 | 8 | # Required 9 | version: 2 10 | 11 | sphinx: 12 | configuration: docs/conf.py 13 | 14 | build: 15 | os: ubuntu-20.04 16 | tools: 17 | python: "3" 18 | 19 | python: 20 | install: 21 | - requirements: docs/requirements.txt 22 | - requirements: requirements.txt 23 | -------------------------------------------------------------------------------- /CODE_OF_CONDUCT.md: -------------------------------------------------------------------------------- 1 | 6 | 7 | # Adafruit Community Code of Conduct 8 | 9 | ## Our Pledge 10 | 11 | In the interest of fostering an open and welcoming environment, we as 12 | contributors and leaders pledge to making participation in our project and 13 | our community a harassment-free experience for everyone, regardless of age, body 14 | size, disability, ethnicity, gender identity and expression, level or type of 15 | experience, education, socio-economic status, nationality, personal appearance, 16 | race, religion, or sexual identity and orientation. 17 | 18 | ## Our Standards 19 | 20 | We are committed to providing a friendly, safe and welcoming environment for 21 | all. 22 | 23 | Examples of behavior that contributes to creating a positive environment 24 | include: 25 | 26 | * Be kind and courteous to others 27 | * Using welcoming and inclusive language 28 | * Being respectful of differing viewpoints and experiences 29 | * Collaborating with other community members 30 | * Gracefully accepting constructive criticism 31 | * Focusing on what is best for the community 32 | * Showing empathy towards other community members 33 | 34 | Examples of unacceptable behavior by participants include: 35 | 36 | * The use of sexualized language or imagery and sexual attention or advances 37 | * The use of inappropriate images, including in a community member's avatar 38 | * The use of inappropriate language, including in a community member's nickname 39 | * Any spamming, flaming, baiting or other attention-stealing behavior 40 | * Excessive or unwelcome helping; answering outside the scope of the question 41 | asked 42 | * Trolling, insulting/derogatory comments, and personal or political attacks 43 | * Promoting or spreading disinformation, lies, or conspiracy theories against 44 | a person, group, organisation, project, or community 45 | * Public or private harassment 46 | * Publishing others' private information, such as a physical or electronic 47 | address, without explicit permission 48 | * Other conduct which could reasonably be considered inappropriate 49 | 50 | The goal of the standards and moderation guidelines outlined here is to build 51 | and maintain a respectful community. 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For more information, 20 | please refer to 21 | -------------------------------------------------------------------------------- /README.rst: -------------------------------------------------------------------------------- 1 | Introduction 2 | ============= 3 | 4 | .. image:: https://readthedocs.org/projects/adafruit-circuitpython-ds3231-x/badge/?version=latest 5 | :target: https://docs.circuitpython.org/projects/ds3231/en/latest/ 6 | :alt: Documentation Status 7 | 8 | .. image:: https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_Bundle/main/badges/adafruit_discord.svg 9 | :target: https://adafru.it/discord 10 | :alt: Discord 11 | 12 | .. image:: https://github.com/adafruit/Adafruit_CircuitPython_DS3231/workflows/Build%20CI/badge.svg 13 | :target: https://github.com/adafruit/Adafruit_CircuitPython_DS3231/actions/ 14 | :alt: Build Status 15 | 16 | .. image:: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json 17 | :target: https://github.com/astral-sh/ruff 18 | :alt: Code Style: Ruff 19 | 20 | The datasheet for the DS3231 explains that this part is an 21 | "Extremely Accurate I²C-Integrated RTC/TCXO/Crystal". And, 22 | hey, it does exactly what it says on the tin! This Real Time 23 | Clock (RTC) is the most precise you can get in a small, low 24 | power package. 25 | 26 | Most RTCs use an external 32kHz timing crystal that is used 27 | to keep time with low current draw. And that's all well and 28 | good, but those crystals have slight drift, particularly when 29 | the temperature changes (the temperature changes the oscillation 30 | frequency very very very slightly but it does add up!) This 31 | RTC is in a beefy package because the crystal is inside the 32 | chip! And right next to the integrated crystal is a temperature 33 | sensor. That sensor compensates for the frequency changes by 34 | adding or removing clock ticks so that the timekeeping stays 35 | on schedule. 36 | 37 | This is the finest RTC you can get, and now we have it in a 38 | compact, breadboard-friendly breakout. With a coin cell 39 | plugged into the back, you can get years of precision 40 | timekeeping, even when main power is lost. Great for 41 | datalogging and clocks, or anything where you need to 42 | really know the time. 43 | 44 | .. image:: ../docs/_static/3013-01.jpg 45 | :alt: DS3231 Product Image 46 | 47 | Dependencies 48 | ============= 49 | This driver depends on: 50 | 51 | * `Adafruit CircuitPython `_ 52 | * `Bus Device `_ 53 | * `Register `_ 54 | 55 | Please ensure all dependencies are available on the CircuitPython filesystem. 56 | This is easily achieved by downloading 57 | `the Adafruit library and driver bundle `_. 58 | 59 | Installing from PyPI 60 | ==================== 61 | 62 | On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from 63 | PyPI `_. To install for current user: 64 | 65 | .. code-block:: shell 66 | 67 | pip3 install adafruit-circuitpython-ds3231 68 | 69 | To install system-wide (this may be required in some cases): 70 | 71 | .. code-block:: shell 72 | 73 | sudo pip3 install adafruit-circuitpython-ds3231 74 | 75 | To install in a virtual environment in your current project: 76 | 77 | .. code-block:: shell 78 | 79 | mkdir project-name && cd project-name 80 | python3 -m venv .venv 81 | source .venv/bin/activate 82 | pip3 install adafruit-circuitpython-ds3231 83 | 84 | Usage Notes 85 | =========== 86 | 87 | Basics 88 | ------ 89 | 90 | Of course, you must import the library to use it: 91 | 92 | .. code:: python3 93 | 94 | import adafruit_ds3231 95 | import time 96 | 97 | All the Adafruit RTC libraries take an instantiated and active I2C object 98 | (from the ``board`` library) as an argument to their constructor. The way to 99 | create an I2C object depends on the board you are using. For boards with labeled 100 | SCL and SDA pins, you can: 101 | 102 | .. code:: python3 103 | 104 | import board 105 | 106 | Now, to initialize the I2C bus: 107 | 108 | .. code:: python3 109 | 110 | i2c = board.I2C() # uses board.SCL and board.SDA 111 | 112 | Once you have created the I2C interface object, you can use it to instantiate 113 | the RTC object: 114 | 115 | .. code:: python3 116 | 117 | rtc = adafruit_ds3231.DS3231(i2c) 118 | 119 | Date and time 120 | ------------- 121 | 122 | To set the time, you need to set ``datetime`` to a ``time.struct_time`` object: 123 | 124 | .. code:: python3 125 | 126 | rtc.datetime = time.struct_time((2017,1,9,15,6,0,0,9,-1)) 127 | 128 | After the RTC is set, you retrieve the time by reading the ``datetime`` 129 | attribute and access the standard attributes of a struct_time such as ``tm_year``, 130 | ``tm_hour`` and ``tm_min``. 131 | 132 | .. code:: python3 133 | 134 | t = rtc.datetime 135 | print(t) 136 | print(t.tm_hour, t.tm_min) 137 | 138 | Alarm 139 | ----- 140 | 141 | To set the time, you need to set ``alarm1`` or ``alarm2`` to a tuple with a 142 | ``time.struct_time`` object and string representing the frequency such as "hourly": 143 | 144 | .. code:: python3 145 | 146 | rtc.alarm1 = (time.struct_time((2017,1,9,15,6,0,0,9,-1)), "daily") 147 | 148 | After the RTC is set, you retrieve the alarm status by reading the corresponding 149 | ``alarm1_status`` or ``alarm2_status`` attributes. Once True, set it back to False 150 | to reset. 151 | 152 | .. code:: python3 153 | 154 | if rtc.alarm1_status: 155 | print("wake up!") 156 | rtc.alarm1_status = False 157 | 158 | Documentation 159 | ============= 160 | 161 | API documentation for this library can be found on `Read the Docs `_. 162 | 163 | For information on building library documentation, please check out `this guide `_. 164 | 165 | Contributing 166 | ============ 167 | 168 | Contributions are welcome! Please read our `Code of Conduct 169 | `_ 170 | before contributing to help this project stay welcoming. 171 | -------------------------------------------------------------------------------- /README.rst.license: -------------------------------------------------------------------------------- 1 | SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries 2 | 3 | SPDX-License-Identifier: MIT 4 | -------------------------------------------------------------------------------- /adafruit_ds3231.py: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2016 Philip R. Moyer for Adafruit Industries 2 | # SPDX-FileCopyrightText: 2016 Radomir Dopieralski for Adafruit Industries 3 | # 4 | # SPDX-License-Identifier: MIT 5 | 6 | """ 7 | `adafruit_ds3231` 8 | ================================================= 9 | CircuitPython library to support DS3231 Real Time Clock (RTC). 10 | 11 | This library supports the use of the DS3231-based RTC in CircuitPython. 12 | 13 | Author(s): Philip R. Moyer and Radomir Dopieralski for Adafruit Industries. 14 | 15 | Implementation Notes 16 | -------------------- 17 | 18 | **Hardware:** 19 | 20 | * `Adafruit DS3231 Precision RTC FeatherWing 21 | `_ (Product ID: 3028) 22 | 23 | * `Adafruit DS3231 RTC breakout 24 | `_ (Product ID: 3013) 25 | 26 | * `Adafruit ChronoDot - Ultra-precise Real Time Clock - v2.1 27 | `_ (Product ID: 255) 28 | 29 | 30 | **Software and Dependencies:** 31 | 32 | * Adafruit CircuitPython firmware for the supported boards: 33 | https://circuitpython.org/downloads 34 | 35 | * Adafruit's Bus Device library: 36 | https://github.com/adafruit/Adafruit_CircuitPython_BusDevice 37 | 38 | * Adafruit's Register library: 39 | https://github.com/adafruit/Adafruit_CircuitPython_Register 40 | 41 | 42 | **Notes:** 43 | 44 | #. Milliseconds are not supported by this RTC. 45 | #. Datasheet: https://datasheets.maximintegrated.com/en/ds/DS3231.pdf 46 | 47 | """ 48 | 49 | from adafruit_bus_device.i2c_device import I2CDevice 50 | from adafruit_register import i2c_bcd_alarm, i2c_bcd_datetime, i2c_bit, i2c_bits 51 | 52 | try: 53 | # Used only for typing 54 | import typing 55 | from time import struct_time 56 | 57 | from busio import I2C 58 | except ImportError: 59 | pass 60 | 61 | __version__ = "0.0.0+auto.0" 62 | __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_DS3231.git" 63 | 64 | 65 | class DS3231: 66 | """Interface to the DS3231 RTC. 67 | 68 | :param ~busio.I2C i2c: The I2C bus the device is connected to 69 | 70 | **Quickstart: Importing and using the device** 71 | 72 | Here is an example of using the :class:`DS3231` class. 73 | First you will need to import the libraries to use the sensor 74 | 75 | .. code-block:: python 76 | 77 | import time 78 | import board 79 | import adafruit_ds3231 80 | 81 | Once this is done you can define your `board.I2C` object and define your sensor object 82 | 83 | .. code-block:: python 84 | 85 | i2c = board.I2C() # uses board.SCL and board.SDA 86 | rtc = adafruit_ds3231.DS3231(i2c) 87 | 88 | Now you can give the current time to the device. 89 | 90 | .. code-block:: python 91 | 92 | t = time.struct_time((2017, 10, 29, 15, 14, 15, 0, -1, -1)) 93 | rtc.datetime = t 94 | 95 | You can access the current time accessing the :attr:`datetime` attribute. 96 | 97 | .. code-block:: python 98 | 99 | current_time = rtc.datetime 100 | 101 | """ 102 | 103 | lost_power = i2c_bit.RWBit(0x0F, 7) 104 | """True if the device has lost power since the time was set.""" 105 | 106 | disable_oscillator = i2c_bit.RWBit(0x0E, 7) 107 | """True if the oscillator is disabled.""" 108 | 109 | datetime_register = i2c_bcd_datetime.BCDDateTimeRegister(0x00) 110 | """Current date and time.""" 111 | 112 | alarm1 = i2c_bcd_alarm.BCDAlarmTimeRegister(0x07) 113 | """Alarm time for the first alarm.""" 114 | 115 | alarm1_interrupt = i2c_bit.RWBit(0x0E, 0) 116 | """True if the interrupt pin will output when alarm1 is alarming.""" 117 | 118 | alarm1_status = i2c_bit.RWBit(0x0F, 0) 119 | """True if alarm1 is alarming. Set to False to reset.""" 120 | 121 | alarm2 = i2c_bcd_alarm.BCDAlarmTimeRegister(0x0B, has_seconds=False) 122 | """Alarm time for the second alarm.""" 123 | 124 | alarm2_interrupt = i2c_bit.RWBit(0x0E, 1) 125 | """True if the interrupt pin will output when alarm2 is alarming.""" 126 | 127 | alarm2_status = i2c_bit.RWBit(0x0F, 1) 128 | """True if alarm2 is alarming. Set to False to reset.""" 129 | 130 | _calibration = i2c_bits.RWBits(8, 0x10, 0, 1, signed=True) 131 | 132 | _temperature = i2c_bits.RWBits(10, 0x11, 6, register_width=2, lsb_first=False, signed=True) 133 | # pylint: enable=unexpected-keyword-arg 134 | 135 | _busy = i2c_bit.ROBit(0x0F, 2) 136 | _conv = i2c_bit.RWBit(0x0E, 5) 137 | 138 | def __init__(self, i2c: I2C) -> None: 139 | self.i2c_device = I2CDevice(i2c, 0x68) 140 | 141 | @property 142 | def datetime(self) -> struct_time: 143 | """Gets the current date and time or sets the current date and time 144 | then starts the clock.""" 145 | return self.datetime_register 146 | 147 | @datetime.setter 148 | def datetime(self, value: struct_time) -> None: 149 | self.datetime_register = value 150 | self.disable_oscillator = False 151 | self.lost_power = False 152 | 153 | @property 154 | def temperature(self) -> float: 155 | """Returns the last temperature measurement. Temperature is updated 156 | only every 64 seconds, or when a conversion is forced.""" 157 | return self._temperature / 4 158 | 159 | def force_temperature_conversion(self) -> float: 160 | """Forces a conversion and returns the new temperature""" 161 | while self._busy: 162 | pass # Wait for any normal in-progress conversion to complete 163 | self._conv = True 164 | while self._conv: 165 | pass # Wait for manual conversion request to complete 166 | return self.temperature 167 | 168 | @property 169 | def calibration(self) -> int: 170 | """Calibrate the frequency of the crystal oscillator by adding or 171 | removing capacitance. The datasheet calls this the Aging Offset. 172 | Calibration values range from -128 to 127; each step is approximately 173 | 0.1ppm, and positive values decrease the frequency (increase the 174 | period). When set, a temperature conversion is forced so the result of 175 | calibration can be seen directly at the 32kHz pin immediately""" 176 | return self._calibration 177 | 178 | @calibration.setter 179 | def calibration(self, value: int) -> None: 180 | self._calibration = value 181 | self.force_temperature_conversion() 182 | -------------------------------------------------------------------------------- /docs/_static/3013-01.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_DS3231/e2360038e20fda56d4c627998b6c49d7f9c681f3/docs/_static/3013-01.jpg -------------------------------------------------------------------------------- /docs/_static/3013-01.jpg.license: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: CC-BY-SA-4.0 4 | -------------------------------------------------------------------------------- /docs/_static/favicon.ico: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_DS3231/e2360038e20fda56d4c627998b6c49d7f9c681f3/docs/_static/favicon.ico -------------------------------------------------------------------------------- /docs/_static/favicon.ico.license: -------------------------------------------------------------------------------- 1 | SPDX-FileCopyrightText: 2018 Phillip Torrone for Adafruit Industries 2 | 3 | SPDX-License-Identifier: CC-BY-4.0 4 | -------------------------------------------------------------------------------- /docs/api.rst: -------------------------------------------------------------------------------- 1 | 2 | API Reference 3 | ############# 4 | 5 | .. automodule:: adafruit_ds3231 6 | :members: 7 | -------------------------------------------------------------------------------- /docs/api.rst.license: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2020 ladyada for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | -------------------------------------------------------------------------------- /docs/conf.py: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | 5 | import datetime 6 | import os 7 | import sys 8 | 9 | sys.path.insert(0, os.path.abspath("..")) 10 | 11 | # -- General configuration ------------------------------------------------ 12 | 13 | # Add any Sphinx extension module names here, as strings. They can be 14 | # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom 15 | # ones. 16 | extensions = [ 17 | "sphinx.ext.autodoc", 18 | "sphinxcontrib.jquery", 19 | "sphinx.ext.intersphinx", 20 | "sphinx.ext.napoleon", 21 | "sphinx.ext.todo", 22 | ] 23 | 24 | # TODO: Please Read! 25 | # Uncomment the below if you use native CircuitPython modules such as 26 | # digitalio, micropython and busio. List the modules you use. Without it, the 27 | # autodoc module docs will fail to generate with a warning. 28 | # autodoc_mock_imports = ["adafruit_bus_device", "adafruit_register"] 29 | 30 | intersphinx_mapping = { 31 | "python": ("https://docs.python.org/3", None), 32 | "BusDevice": ( 33 | "https://docs.circuitpython.org/projects/busdevice/en/latest/", 34 | None, 35 | ), 36 | "Register": ( 37 | "https://docs.circuitpython.org/projects/register/en/latest/", 38 | None, 39 | ), 40 | "CircuitPython": ("https://docs.circuitpython.org/en/latest/", None), 41 | } 42 | 43 | # Show the docstring from both the class and its __init__() method. 44 | autoclass_content = "both" 45 | 46 | # Add any paths that contain templates here, relative to this directory. 47 | templates_path = ["_templates"] 48 | 49 | source_suffix = ".rst" 50 | 51 | # The master toctree document. 52 | master_doc = "index" 53 | 54 | # General information about the project. 55 | project = "Adafruit's DS3231 RTC Library" 56 | creation_year = "2016" 57 | current_year = str(datetime.datetime.now().year) 58 | year_duration = ( 59 | current_year if current_year == creation_year else creation_year + " - " + current_year 60 | ) 61 | copyright = year_duration + " Philip Moyer" 62 | author = "Philip Moyer" 63 | 64 | # The version info for the project you're documenting, acts as replacement for 65 | # |version| and |release|, also used in various other places throughout the 66 | # built documents. 67 | # 68 | # The short X.Y version. 69 | version = "1.0" 70 | # The full version, including alpha/beta/rc tags. 71 | release = "1.0" 72 | 73 | # The language for content autogenerated by Sphinx. Refer to documentation 74 | # for a list of supported languages. 75 | # 76 | # This is also used if you do content translation via gettext catalogs. 77 | # Usually you set "language" from the command line for these cases. 78 | language = "en" 79 | 80 | # List of patterns, relative to source directory, that match files and 81 | # directories to ignore when looking for source files. 82 | # This patterns also effect to html_static_path and html_extra_path 83 | exclude_patterns = [ 84 | "_build", 85 | "Thumbs.db", 86 | ".DS_Store", 87 | ".env", 88 | "CODE_OF_CONDUCT.md", 89 | ] 90 | 91 | # The reST default role (used for this markup: `text`) to use for all 92 | # documents. 93 | # 94 | default_role = "any" 95 | 96 | # If true, '()' will be appended to :func: etc. cross-reference text. 97 | # 98 | add_function_parentheses = True 99 | 100 | # The name of the Pygments (syntax highlighting) style to use. 101 | pygments_style = "sphinx" 102 | 103 | # If true, `todo` and `todoList` produce output, else they produce nothing. 104 | todo_include_todos = False 105 | 106 | # If this is True, todo emits a warning for each TODO entries. The default is False. 107 | todo_emit_warnings = True 108 | 109 | napoleon_numpy_docstring = False 110 | 111 | # -- Options for HTML output ---------------------------------------------- 112 | 113 | # The theme to use for HTML and HTML Help pages. See the documentation for 114 | # a list of builtin themes. 115 | # 116 | import sphinx_rtd_theme 117 | 118 | html_theme = "sphinx_rtd_theme" 119 | 120 | # Add any paths that contain custom static files (such as style sheets) here, 121 | # relative to this directory. They are copied after the builtin static files, 122 | # so a file named "default.css" will overwrite the builtin "default.css". 123 | html_static_path = ["_static"] 124 | 125 | # The name of an image file (relative to this directory) to use as a favicon of 126 | # the docs. This file should be a Windows icon file (.ico) being 16x16 or 32x32 127 | # pixels large. 128 | # 129 | html_favicon = "_static/favicon.ico" 130 | 131 | # Output file base name for HTML help builder. 132 | htmlhelp_basename = "AdafruitsDS3231RTCLibrarydoc" 133 | 134 | # -- Options for LaTeX output --------------------------------------------- 135 | 136 | latex_elements = { 137 | # The paper size ('letterpaper' or 'a4paper'). 138 | # 'papersize': 'letterpaper', 139 | # The font size ('10pt', '11pt' or '12pt'). 140 | # 'pointsize': '10pt', 141 | # Additional stuff for the LaTeX preamble. 142 | # 'preamble': '', 143 | # Latex figure (float) alignment 144 | # 'figure_align': 'htbp', 145 | } 146 | 147 | # Grouping the document tree into LaTeX files. List of tuples 148 | # (source start file, target name, title, 149 | # author, documentclass [howto, manual, or own class]). 150 | latex_documents = [ 151 | ( 152 | master_doc, 153 | "AdafruitsDS3231RTCLibrary.tex", 154 | "Adafruit's DS3231 RTC Library Documentation", 155 | "Philip Moyer", 156 | "manual", 157 | ), 158 | ] 159 | 160 | # -- Options for manual page output --------------------------------------- 161 | 162 | # One entry per manual page. List of tuples 163 | # (source start file, name, description, authors, manual section). 164 | man_pages = [ 165 | ( 166 | master_doc, 167 | "adafruitsds3231rtclibrary", 168 | "Adafruit's DS3231 RTC Library Documentation", 169 | [author], 170 | 1, 171 | ), 172 | ] 173 | 174 | # -- Options for Texinfo output ------------------------------------------- 175 | 176 | # Grouping the document tree into Texinfo files. List of tuples 177 | # (source start file, target name, title, author, 178 | # dir menu entry, description, category) 179 | texinfo_documents = [ 180 | ( 181 | master_doc, 182 | "AdafruitsDS3231RTCLibrary", 183 | "Adafruit's DS3231 RTC Library Documentation", 184 | author, 185 | "AdafruitsDS3231RTCLibrary", 186 | "One line description of project.", 187 | "Miscellaneous", 188 | ), 189 | ] 190 | -------------------------------------------------------------------------------- /docs/examples.rst: -------------------------------------------------------------------------------- 1 | Simple test 2 | ------------ 3 | 4 | Ensure your device works with this simple test. 5 | 6 | .. literalinclude:: ../examples/ds3231_simpletest.py 7 | :caption: examples/ds3231_simpletest.py 8 | :linenos: 9 | -------------------------------------------------------------------------------- /docs/examples.rst.license: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2020 ladyada for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | -------------------------------------------------------------------------------- /docs/index.rst: -------------------------------------------------------------------------------- 1 | .. include:: ../README.rst 2 | 3 | Table of Contents 4 | ================= 5 | 6 | .. toctree:: 7 | :maxdepth: 4 8 | :hidden: 9 | 10 | self 11 | 12 | .. toctree:: 13 | :caption: Examples 14 | 15 | examples 16 | 17 | .. toctree:: 18 | :caption: API Reference 19 | :maxdepth: 3 20 | 21 | api 22 | 23 | .. toctree:: 24 | :caption: Tutorials 25 | 26 | Adafruit DS3231 Precision RTC Breakout Learning Guide 27 | 28 | .. toctree:: 29 | :caption: Related Products 30 | 31 | Adafruit DS3231 Precision RTC Breakout 32 | 33 | Adafruit ChronoDot - Ultra-precise Real Time Clock 34 | 35 | .. toctree:: 36 | :caption: Other Links 37 | 38 | Download from GitHub 39 | Download Library Bundle 40 | CircuitPython Reference Documentation 41 | CircuitPython Support Forum 42 | Discord Chat 43 | Adafruit Learning System 44 | Adafruit Blog 45 | Adafruit Store 46 | 47 | Indices and tables 48 | ================== 49 | 50 | * :ref:`genindex` 51 | * :ref:`modindex` 52 | * :ref:`search` 53 | -------------------------------------------------------------------------------- /docs/index.rst.license: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2020 ladyada for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | -------------------------------------------------------------------------------- /docs/requirements.txt: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: Unlicense 4 | 5 | sphinx 6 | sphinxcontrib-jquery 7 | sphinx-rtd-theme 8 | -------------------------------------------------------------------------------- /examples/ds3231_displayio_simpletest.py: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2024 2 | # SPDX-License-Identifier: MIT 3 | 4 | import board 5 | from adafruit_display_text.label import Label 6 | from displayio import Group 7 | from terminalio import FONT 8 | 9 | import adafruit_ds3231 10 | 11 | # Create the RTC object, communicating over the board's default I2C bus 12 | i2c = board.I2C() # uses board.SCL and board.SDA 13 | # i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector 14 | ds3231 = adafruit_ds3231.DS3231(i2c) 15 | 16 | 17 | # Example written for boards with built-in displays 18 | display = board.DISPLAY 19 | 20 | # Create a main_group to hold anything we want to show on the display. 21 | main_group = Group() 22 | 23 | # Create a Label to show the readings. If you have a very small 24 | # display you may need to change to scale=1. 25 | display_output_label = Label(FONT, text="", scale=2) 26 | 27 | # Place the label near the top left corner with anchored positioning 28 | display_output_label.anchor_point = (0, 0) 29 | display_output_label.anchored_position = (4, 4) 30 | 31 | # Add the label to the main_group 32 | main_group.append(display_output_label) 33 | 34 | # Set the main_group as the root_group of the display 35 | display.root_group = main_group 36 | 37 | 38 | # Lookup tables for names of days and months - pretty printing 39 | days = ("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday") 40 | months = ( 41 | "January", 42 | "February", 43 | "March", 44 | "April", 45 | "May", 46 | "June", 47 | "July", 48 | "August", 49 | "September", 50 | "October", 51 | "November", 52 | "December", 53 | ) 54 | 55 | # Begin main loop 56 | while True: 57 | t = ds3231.datetime 58 | # Update the label.text property to change the text on the display 59 | display_output_label.text = f"{days[t.tm_wday]}\ 60 | \n{t.tm_mday} {months[t.tm_mon-1]} {t.tm_year}\ 61 | \n{t.tm_hour}:{t.tm_min:02}:{t.tm_sec:02}" 62 | -------------------------------------------------------------------------------- /examples/ds3231_simpletest.py: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries 2 | # SPDX-License-Identifier: MIT 3 | 4 | # Simple demo of reading and writing the time for the DS3231 real-time clock. 5 | # Change the if False to if True below to set the time, otherwise it will just 6 | # print the current date and time every second. Notice also comments to adjust 7 | # for working with hardware vs. software I2C. 8 | 9 | import time 10 | 11 | import board 12 | 13 | import adafruit_ds3231 14 | 15 | i2c = board.I2C() # uses board.SCL and board.SDA 16 | # i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller 17 | rtc = adafruit_ds3231.DS3231(i2c) 18 | 19 | # Lookup table for names of days (nicer printing). 20 | days = ("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday") 21 | 22 | 23 | if False: # change to True if you want to set the time! 24 | # year, mon, date, hour, min, sec, wday, yday, isdst 25 | t = time.struct_time((2017, 10, 29, 15, 14, 15, 0, -1, -1)) 26 | # you must set year, mon, date, hour, min, sec and weekday 27 | # yearday is not supported, isdst can be set but we don't do anything with it at this time 28 | print("Setting time to:", t) # uncomment for debugging 29 | rtc.datetime = t 30 | print() 31 | 32 | # Main loop: 33 | while True: 34 | t = rtc.datetime 35 | # print(t) # uncomment for debugging 36 | print(f"The date is {days[int(t.tm_wday)]} {t.tm_mday}/{t.tm_mon}/{t.tm_year}") 37 | print(f"The time is {t.tm_hour}:{t.tm_min:02}:{t.tm_sec:02}") 38 | time.sleep(1) # wait a second 39 | -------------------------------------------------------------------------------- /optional_requirements.txt: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2022 Alec Delaney, for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: Unlicense 4 | -------------------------------------------------------------------------------- /pyproject.toml: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2022 Alec Delaney for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | 5 | [build-system] 6 | requires = [ 7 | "setuptools", 8 | "wheel", 9 | "setuptools-scm", 10 | ] 11 | 12 | [project] 13 | name = "adafruit-circuitpython-ds3231" 14 | description = "CircuitPython library for DS3231 precision real-time clock." 15 | version = "0.0.0+auto.0" 16 | readme = "README.rst" 17 | authors = [ 18 | {name = "Adafruit Industries", email = "circuitpython@adafruit.com"} 19 | ] 20 | urls = {Homepage = "https://github.com/adafruit/Adafruit_CircuitPython_DS3231"} 21 | keywords = [ 22 | "adafruit", 23 | "precision", 24 | "real-time", 25 | "real", 26 | "time", 27 | "clock", 28 | "breakout", 29 | "hardware", 30 | "micropython", 31 | "circuitpython", 32 | ] 33 | license = {text = "MIT"} 34 | classifiers = [ 35 | "Intended Audience :: Developers", 36 | "Topic :: Software Development :: Libraries", 37 | "Topic :: Software Development :: Embedded Systems", 38 | "Topic :: System :: Hardware", 39 | "License :: OSI Approved :: MIT License", 40 | "Programming Language :: Python :: 3", 41 | ] 42 | dynamic = ["dependencies", "optional-dependencies"] 43 | 44 | [tool.setuptools] 45 | py-modules = ["adafruit_ds3231"] 46 | 47 | [tool.setuptools.dynamic] 48 | dependencies = {file = ["requirements.txt"]} 49 | optional-dependencies = {optional = {file = ["optional_requirements.txt"]}} 50 | -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2022 Alec Delaney, for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: Unlicense 4 | 5 | Adafruit-Blinka 6 | adafruit-circuitpython-register 7 | adafruit-circuitpython-busdevice 8 | -------------------------------------------------------------------------------- /ruff.toml: -------------------------------------------------------------------------------- 1 | # SPDX-FileCopyrightText: 2024 Tim Cocks for Adafruit Industries 2 | # 3 | # SPDX-License-Identifier: MIT 4 | 5 | target-version = "py38" 6 | line-length = 100 7 | 8 | [lint] 9 | preview = true 10 | select = ["I", "PL", "UP"] 11 | 12 | extend-select = [ 13 | "D419", # empty-docstring 14 | "E501", # line-too-long 15 | "W291", # trailing-whitespace 16 | "PLC0414", # useless-import-alias 17 | "PLC2401", # non-ascii-name 18 | "PLC2801", # unnecessary-dunder-call 19 | "PLC3002", # unnecessary-direct-lambda-call 20 | "E999", # syntax-error 21 | "PLE0101", # return-in-init 22 | "F706", # return-outside-function 23 | "F704", # yield-outside-function 24 | "PLE0116", # continue-in-finally 25 | "PLE0117", # nonlocal-without-binding 26 | "PLE0241", # duplicate-bases 27 | "PLE0302", # unexpected-special-method-signature 28 | "PLE0604", # invalid-all-object 29 | "PLE0605", # invalid-all-format 30 | "PLE0643", # potential-index-error 31 | "PLE0704", # misplaced-bare-raise 32 | "PLE1141", # dict-iter-missing-items 33 | "PLE1142", # await-outside-async 34 | "PLE1205", # logging-too-many-args 35 | "PLE1206", # logging-too-few-args 36 | "PLE1307", # bad-string-format-type 37 | "PLE1310", # bad-str-strip-call 38 | "PLE1507", # invalid-envvar-value 39 | "PLE2502", # bidirectional-unicode 40 | "PLE2510", # invalid-character-backspace 41 | "PLE2512", # invalid-character-sub 42 | "PLE2513", # invalid-character-esc 43 | "PLE2514", # invalid-character-nul 44 | "PLE2515", # invalid-character-zero-width-space 45 | "PLR0124", # comparison-with-itself 46 | "PLR0202", # no-classmethod-decorator 47 | "PLR0203", # no-staticmethod-decorator 48 | "UP004", # useless-object-inheritance 49 | "PLR0206", # property-with-parameters 50 | "PLR0904", # too-many-public-methods 51 | "PLR0911", # too-many-return-statements 52 | "PLR0912", # too-many-branches 53 | "PLR0913", # too-many-arguments 54 | "PLR0914", # too-many-locals 55 | "PLR0915", # too-many-statements 56 | "PLR0916", # too-many-boolean-expressions 57 | "PLR1702", # too-many-nested-blocks 58 | "PLR1704", # redefined-argument-from-local 59 | "PLR1711", # useless-return 60 | "C416", # unnecessary-comprehension 61 | "PLR1733", # unnecessary-dict-index-lookup 62 | "PLR1736", # unnecessary-list-index-lookup 63 | 64 | # ruff reports this rule is unstable 65 | #"PLR6301", # no-self-use 66 | 67 | "PLW0108", # unnecessary-lambda 68 | "PLW0120", # useless-else-on-loop 69 | "PLW0127", # self-assigning-variable 70 | "PLW0129", # assert-on-string-literal 71 | "B033", # duplicate-value 72 | "PLW0131", # named-expr-without-context 73 | "PLW0245", # super-without-brackets 74 | "PLW0406", # import-self 75 | "PLW0602", # global-variable-not-assigned 76 | "PLW0603", # global-statement 77 | "PLW0604", # global-at-module-level 78 | 79 | # fails on the try: import typing used by libraries 80 | #"F401", # unused-import 81 | 82 | "F841", # unused-variable 83 | "E722", # bare-except 84 | "PLW0711", # binary-op-exception 85 | "PLW1501", # bad-open-mode 86 | "PLW1508", # invalid-envvar-default 87 | "PLW1509", # subprocess-popen-preexec-fn 88 | "PLW2101", # useless-with-lock 89 | "PLW3301", # nested-min-max 90 | ] 91 | 92 | ignore = [ 93 | "PLR2004", # magic-value-comparison 94 | "UP030", # format literals 95 | "PLW1514", # unspecified-encoding 96 | "PLR0913", # too-many-arguments 97 | "PLR0915", # too-many-statements 98 | "PLR0917", # too-many-positional-arguments 99 | "PLR0904", # too-many-public-methods 100 | "PLR0912", # too-many-branches 101 | "PLR0916", # too-many-boolean-expressions 102 | ] 103 | 104 | [format] 105 | line-ending = "lf" 106 | --------------------------------------------------------------------------------