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Laurens Valk
46d9e3c119
Split all classes to their own file. This keeps things organized, and allows per-class comments about compatibility. Also flatten toggled examples.
51 lines
1.6 KiB
ReStructuredText
51 lines
1.6 KiB
ReStructuredText
Generic I2C Device
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^^^^^^^^^^^^^^^^^^
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.. note::
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This class is **only supported on the EV3** at this time. It could be added
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to Powered Up hubs in a future release. If you'd like to see this happen, be
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sure to ask us on our `support page`_.
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.. _support page: https://github.com/pybricks/support/issues/
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.. figure:: ../../api/images/sensor_rj12_bluegreen.png
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:width: 25 %
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.. autoclass:: pybricks.iodevices.I2CDevice
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**Example: Read and write to an I2C device**
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.. literalinclude:: ../../../examples/ev3/i2c_basics/main.py
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.. _i2caddress:
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I2C Addresses
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---------------
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I2C addresses are 7-bit values. However, most vendors who make LEGO compatible
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sensors provide an 8-bit address in their documentation.
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To use those addresses, you must shift them by 1 bit.
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For example, if the documented address is ``0xD2``, you can do
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``address = 0xD2 >> 1``.
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Advanced I2C Commands
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---------------------
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Some rudimentary I2C devices do not require a register argument or even any
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data. You can achieve this behavior as shown in the examples below.
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**Example: Advanced I2C read and write techniques**
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.. literalinclude:: ../../../examples/ev3/i2c_extra/main.py
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**Additional technical resources**
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The ``I2CDevice`` class methods call functions from the Linux SMBus driver.
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To find out which commands are called under the hood, check the
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`Pybricks source code`_.
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More details about using I2C without MicroPython can be found on
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the `ev3dev I2C`_ page.
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.. _ev3dev I2C: http://docs.ev3dev.org/projects/lego-linux-drivers/en/ev3dev-stretch/i2c.html
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.. _Pybricks source code: https://github.com/pybricks/pybricks-micropython
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