https://github.com/artizirk/python-axp209

A Python library for talking to the AXP209 Power Management Unit
https://github.com/artizirk/python-axp209

Last synced: 16 days ago
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A Python library for talking to the AXP209 Power Management Unit

• Host: GitHub
• URL: https://github.com/artizirk/python-axp209
• Owner: artizirk
• License: mit
• Created: 2016-08-10T04:16:36.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2019-06-25T17:04:23.000Z (over 5 years ago)
• Last Synced: 2024-10-05T20:33:43.571Z (about 1 month ago)
• Language: Python
• Size: 12.7 KB
• Stars: 8
• Watchers: 2
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.rst
  • License: LICENSE

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README

        
A Python library for talking to the AXP209 power management unit

================================================================

AXP209 is a pmu that is used on quite few Allwinner embeded boards, like C.H.I.P

and Cubietruck.

Because currently the sysfs api for AXP209 is in flux I wrote

this library that bypasses the kernel and directly talks to the AXP209 over I2C

bus using `smbus2 `_ library.

This library runs on both Python 2.7 and Python 3

Installation

------------

.. code::

    pip install axp209

SMBus bus number/object

-----------------------

The default SMBus object set in this library is an integer 0. You might need to

change to another integer[like 1] depending on your system, or pass an object.

e.g. axp = AXP209(1) for the Olimex A20-SOM204.

Examples

--------

.. code::

    >>> from axp209 import AXP209

    >>> axp = AXP209()

    >>> axp.battery_voltage

    4144.8

    >>> axp.battery_discharge_current

    269.0

    >>>

Read and print out all the battery status values

.. code:: python

    from axp209 import AXP209

    axp = AXP209()

    print("internal_temperature: %.2fC" % axp.internal_temperature)

    print("battery_exists: %s" % axp.battery_exists)

    print("battery_charging: %s" % ("charging" if axp.battery_charging else "done"))

    print("battery_current_direction: %s" % ("charging" if axp.battery_current_direction else "discharging"))

    print("battery_voltage: %.1fmV" % axp.battery_voltage)

    print("battery_discharge_current: %.1fmA" % axp.battery_discharge_current)

    print("battery_charge_current: %.1fmA" % axp.battery_charge_current)

    print("battery_gauge: %d%%" % axp.battery_gauge)

    axp.close()

Blink CHIP status led

.. code:: python

    from time import sleep

    from axp209 import AXP209

    with AXP209() as axp:

        while True:

            axp.gpio2_output = False

            sleep(1)

            axp.gpio2_output = True

            sleep(1)

There is also a commandline utility than you can use after installing it

.. code::

    root@sumochip1:~# axp209

    internal_temperature: 67.00C

    battery_exists: True

    battery_charging: charging

    battery_current_direction: discharging

    battery_voltage: 3974.3mV

    battery_discharge_current: 0.0mA

    battery_charge_current: 0.0mA

    battery_gauge: 76%

    root@sumochip1:~#