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zephyr/samples/drivers/CAN/README.rst

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samples: can: Add example code for CAN driver This adds example and testing code for CAN driver. Tested on stm32f072b disco. Examples are given for: - can_configure - can_attach_isr - can_attach_msgq - can_send Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
2018-04-28 06:59:14 +08:00
.. _can-sample:
Controller Area Network
#######################
Overview
********
This sample demonstrates how to use the Controller Area Network (CAN) API.
samples: drivers: CAN: reworked sample code The CAN sample is rewritten to be board independent. The CAN controller and LED is determined automatically and the button is removed. Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
2019-08-07 19:32:04 +08:00
Messages with standard and extended identifiers are sent over the bus.
Messages are received using message-queues and work-queues.
Reception is indicated by blinking the LED (if present) and output to the console.
samples: can: Add example code for CAN driver This adds example and testing code for CAN driver. Tested on stm32f072b disco. Examples are given for: - can_configure - can_attach_isr - can_attach_msgq - can_send Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
2018-04-28 06:59:14 +08:00
Building and Running
********************
In loopback mode, the board receives its own messages. This could be used for
standalone testing.
doc: s/device tree/devicetree/ DTSpec writes this as a single word, presumably to make it easier to grep for / more precise. Follow along in the rest of the docs now that our main DT docs page agrees with this usage. Signed-off-by: Marti Bolivar <marti.bolivar@nordicsemi.no>
2019-10-08 01:37:09 +08:00
The LED output pin is defined in the board's devicetree.
samples: can: Add example code for CAN driver This adds example and testing code for CAN driver. Tested on stm32f072b disco. Examples are given for: - can_configure - can_attach_isr - can_attach_msgq - can_send Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
2018-04-28 06:59:14 +08:00
samples: drivers: CAN: Update to build cleanly for MCP2515 driver Add alternate conf file for MCP2515 so it builds without warning. Update documentation. Signed-off-by: Nick Ward <nix.ward@gmail.com>
2019-10-09 20:30:16 +08:00
The sample can be built and executed for boards with a SoC that have an
integrated CAN controller or for boards with a SoC that has been augmented
with a stand alone CAN controller.
Integrated CAN controller
=========================
For the NXP TWR-KE18F board:
.. zephyr-app-commands::
:zephyr-app: samples/drivers/CAN
:board: twr_ke18f
:goals: build flash
Stand alone CAN controller
==========================
For the nRF52_PCA10040 board combined with the DFRobot CAN bus V2.0 shield that
provides the MCP2515 CAN controller:
.. zephyr-app-commands::
:zephyr-app: samples/drivers/CAN
:board: nrf52_pca10040
:shield: dfrobot_can_bus_v2_0
:conf: prj.mcp2515.conf
:goals: build flash
samples: can: Add example code for CAN driver This adds example and testing code for CAN driver. Tested on stm32f072b disco. Examples are given for: - can_configure - can_attach_isr - can_attach_msgq - can_send Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
2018-04-28 06:59:14 +08:00
Sample output
=============
.. code-block:: console
samples: drivers: CAN: reworked sample code The CAN sample is rewritten to be board independent. The CAN controller and LED is determined automatically and the button is removed. Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
2019-08-07 19:32:04 +08:00
Change LED filter ID: 0
Finished init.
Counter filter id: 4
uart:~$ Counter received: 0
Counter received: 1
Counter received: 2
Counter received: 3
samples: can: Add example code for CAN driver This adds example and testing code for CAN driver. Tested on stm32f072b disco. Examples are given for: - can_configure - can_attach_isr - can_attach_msgq - can_send Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
2018-04-28 06:59:14 +08:00
.. note:: The values shown above might differ.