mirror of
https://github.com/pybricks/pybricks-api.git
synced 2026-09-12 09:37:25 +00:00
Laurens Valk
08e63e69ca
These settings are control properties, so they cannot be altered on DC Motors.
106 lines
3.2 KiB
PHP
106 lines
3.2 KiB
PHP
Analog Sensor
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^^^^^^^^^^^^^
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.. autoclass:: pybricks.iodevices.AnalogSensor
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I2C Device
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^^^^^^^^^^^^^
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.. autoclass:: pybricks.iodevices.I2CDevice
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.. toggle-header::
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:header: **Show/hide example**
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**Example: Read and write to an I2C device.**
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.. literalinclude:: ../../pybricks-projects/snippets/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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.. toggle-header::
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:header: **Show/hide example**
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**Example: Advanced I2C read and write techniques.**
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.. literalinclude:: ../../pybricks-projects/snippets/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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UART Device
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^^^^^^^^^^^^^
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.. autoclass:: pybricks.iodevices.UARTDevice
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.. toggle-header::
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:header: **Show/hide example**
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**Example: Read and write to a UART device.**
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.. literalinclude::
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../../pybricks-projects/snippets/ev3/uart_basics/main.py
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DC Motor
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^^^^^^^^^^^^
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.. autoclass:: pybricks.builtins.DCMotor
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:noindex:
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:no-members:
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.. automethod:: pybricks.builtins.DCMotor.dc
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:noindex:
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Other ev3dev sensors
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^^^^^^^^^^^^^^^^^^^^^
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EV3 MicroPython is built on top of ev3dev, which means that a particular sensor
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may be supported even if it is not listed in this documentation. To test whether
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your sensor is supported:
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* Plug the sensor into your EV3 Brick.
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* Go to the main menu of the EV3 Brick.
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* Select `Device Browser` and then `Sensors`.
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* If your sensor shows up, it is supported.
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You will be able to use this sensor using the ``Ev3devSensor`` class below.
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This lets you read the sensor values for a given mode number. To see which modes
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are available for your sensor:
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* Follow the steps above and select your sensor.
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* Select `set mode`. This shows all available modes for this sensor.
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* You don't need to set a mode now, so press the back button to cancel.
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To read values in your program, enter the mode number as the ``mode`` setting
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in the class shown below. The first mode is mode 0, the second mode is mode 1,
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and so on. To learn more about compatible devices and their modes, visit the
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`ev3dev sensors`_ page.
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.. _ev3dev sensors: http://docs.ev3dev.org/projects/lego-linux-drivers/en/ev3dev-stretch/sensors.html
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.. autoclass:: pybricks.iodevices.Ev3devSensor
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:no-members:
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.. automethod:: pybricks.iodevices.Ev3devSensor.read
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