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A few updates on canbus page (#1813)

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Jesse Hills 2022-01-19 09:55:08 +13:00 committed by GitHub
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components/canbus.rst
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@ -52,7 +52,10 @@ Each canbus platform extends this configuration schema.
std::string b(x.begin(), x.end());
ESP_LOGD("can id 500", "%s", &b[0] );
.. _config-canbus:
Configuration variables:
************************
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
- **can_id** (**Required**, int): default *can id* used for transmitting frames.
@ -79,6 +82,7 @@ Configuration variables:
- 1000KBPS
Automations:
------------
- **on_frame** (*Optional*, :ref:`Automation <automation>`): An automation to perform when ability
CAN Frame is received. See :ref:`canbus-on-frame`.
@ -148,11 +152,24 @@ ESP32 CAN Component
The ESP32 has an integrated CAN controller and therefore doesn't need an external controller necessarily.
You only need to specify the RX and TX pins.
.. code-block:: yaml
# Example configuration entry
canbus:
- platform: esp32_can
tx_pin: GPIO1
rx_pin: GPIO3
can_id: 4
bit_rate: 50kbps
on_frame:
...
Configuration variables:
************************
- **rx_pin** (**Required**, :ref:`Pin <config-pin>`): Receive pin.
- **tx_pin** (**Required**, :ref:`Pin <config-pin>`): Transmit pin.
- All other options from :ref:`Canbus <config-canbus>`.
MCP2515 Component
-----------------
@ -162,20 +179,6 @@ You need to have an :ref:`SPI bus <spi>` in your configuration with both the **m
For wiring up the MSP2515 please refer to the section below.
Configuration variables:
************************
- **cs_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): Is used to tell the receiving SPI device
when it should listen for data on the SPI bus. Each device has an individual ``CS`` line.
Sometimes also called ``SS``.
- **clock** (*Optional*): One of ``8MHZ``, ``16MHZ`` or ``20MHZ``. Clock crystal used on the MCP2515 device.
Defaults to ``8MHZ``.
- **mode** (*Optional*): Operation mode. Default to ``NORMAL``
- NORMAL: Normal operation
- LOOPBACK: Loopback mode can be used to just test you spi connections to the device
- LISTENONLY: only receive data
.. code-block:: yaml
# Example configuration entry
@ -197,6 +200,22 @@ Configuration variables:
id: light_1
brightness: !lambda "return (x.size() > 0) ? (float) x[0]/255 : 0;"
Configuration variables:
************************
- **cs_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): Is used to tell the receiving SPI device
when it should listen for data on the SPI bus. Each device has an individual ``CS`` line.
Sometimes also called ``SS``.
- **clock** (*Optional*): One of ``8MHZ``, ``16MHZ`` or ``20MHZ``. Clock crystal used on the MCP2515 device.
Defaults to ``8MHZ``.
- **mode** (*Optional*): Operation mode. Default to ``NORMAL``
- NORMAL: Normal operation
- LOOPBACK: Loopback mode can be used to just test you spi connections to the device
- LISTENONLY: only receive data
- All other options from :ref:`Canbus <config-canbus>`.
Wiring options
---------------
Easiest approach is to just use fully assembled boards and just add one resistor in the MISO line.