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boards: shields: Add DFRobot CAN bus Shield V2.0
Useful for prototyping designs for the MCP2515 CAN controller Signed-off-by: Nick Ward <[email protected]>
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‎boards/shields/dfrobot_can_bus_v2_0/dfrobot_can_bus_v2_0.conf

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CONFIG_SPI=y
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CONFIG_CAN_1=y
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CONFIG_CAN_MCP2515=y

‎boards/shields/dfrobot_can_bus_v2_0/dfrobot_can_bus_v2_0.overlay

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/*
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* Copyright (c) 2019 Karsten Koenig
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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&arduino_spi {
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status = "okay";
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cs-gpios = <&arduino_header 16 0>; /* D10 */
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mcp2515@0 {
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compatible = "microchip,mcp2515";
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spi-max-frequency = <1000000>;
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int-gpios = <&arduino_header 8 0>; /* D2 */
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status = "okay";
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label = "CAN_1";
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reg = <0x0>;
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osc-freq = <16000000>;
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bus-speed = <125000>;
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sjw = <1>;
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prop-seg = <2>;
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phase-seg1 = <7>;
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phase-seg2 = <6>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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};

‎boards/shields/dfrobot_can_bus_v2_0/doc/dfrobot_can_bus_v2_0.jpg

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‎boards/shields/dfrobot_can_bus_v2_0/doc/index.rst

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.. _dfrobot_can_bus_v2_0:
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DFRobot CAN BUS Shield V2.0
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###########################
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Overview
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********
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The DFRobot CAN BUS shield supports the Microship MCP2515 stand-alone CAN
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controller and JTA1050 high speed CAN tranceiver.
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The shield has an Arduino Uno R3 compatible hardware interface.
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.. image:: ./dfrobot_can_bus_v2_0.jpg
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:width: 720px
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:align: center
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:alt: DFRobot_CAN_BUS_V2_0_SHIELD
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Hardware
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********
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- MCP2515
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- Stand-Alone CAN 2.0B Controller
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- Up to 1Mb/s baud rate
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- Standard and extended data and remote frames
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- 3x Tx Buffers
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- 2x Rx Buffers
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- 6x 29-bit Filters
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- 2x 29-bit Masks
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- Interrupt output
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- One shot mode
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- High speed SPI interface (10 MHz)
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- TJA1050
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- Fully compatible with the “ISO 11898” standard
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- High speed (up to 1 Mbaud)
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- Connectivity
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- Industrial standard DB9 terminal (CAN)
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- Screw terminals (CAN)
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- Integrated MicroSD socket for data storage (SPI)
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- Arduino Uno R3 compatible (SPI)
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+-------+-----------------------+---------------------------+
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| Name | Function | Usage |
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+=======+=======================+===========================+
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| A0 | None | |
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+-------+-----------------------+---------------------------+
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| A1 | None | |
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+-------+-----------------------+---------------------------+
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| A2 | None | |
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+-------+-----------------------+---------------------------+
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| A3 | None | |
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+-------+-----------------------+---------------------------+
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| A4 | None | |
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+-------+-----------------------+---------------------------+
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| A5 | None | |
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+-------+-----------------------+---------------------------+
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| D0 | RX | Ext. header only |
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+-------+-----------------------+---------------------------+
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| D1 | TX | Ext. header only |
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+-------+-----------------------+---------------------------+
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| D2 | GPIO_INT_ACTIVE_LOW | MCP2515 - INT |
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+-------+-----------------------+---------------------------+
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| D3 | None | |
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+-------+-----------------------+---------------------------+
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| D4 | SPI-CS | MicroSD |
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+-------+-----------------------+---------------------------+
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| D5 | None | |
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+-------+-----------------------+---------------------------+
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| D6 | None | |
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+-------+-----------------------+---------------------------+
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| D7 | None | |
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+-------+-----------------------+---------------------------+
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| D8 | None | |
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+-------+-----------------------+---------------------------+
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| D9 | None | |
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+-------+-----------------------+---------------------------+
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| D10 | SPI-CS | MCP2515 |
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+-------+-----------------------+---------------------------+
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| D11 | SPI-MOSI | MCP2515 / MicroSD |
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+-------+-----------------------+---------------------------+
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| D12 | SPI-MISO | MCP2515 / MicroSD |
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+-------+-----------------------+---------------------------+
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| D13 | SPI-CLK | MCP2515 / MicroSD |
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+-------+-----------------------+---------------------------+
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| D14 | I2C-SDA | Ext. header only |
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+-------+-----------------------+---------------------------+
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| D15 | I2C_SCL | Ext. header only |
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+-------+-----------------------+---------------------------+
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- Power Supply
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- 3.3V ~ 5V
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- Components
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- Power switch
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- Power LED
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- RX0BF LED
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- RX1BF LED
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For more information about the DFRobot CAN-BUS V2.0 shield:
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- `DFRobot Website`_
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- `DFRobot CAN BUS Shield V2.0 schematic`_
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- `MCP2515 Datasheet`_
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- `TJA1050 Datasheet`_
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Programming
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***********
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Set ``-DSHIELD=dfrobot_can_bus_v2_0`` when you invoke ``west build`` or ``cmake`` in your
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Zephyr application. For example:
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.. zephyr-app-commands::
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:zephyr-app: samples/drivers/CAN
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:tool: all
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:board: nrf52_pca10040
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:shield: dfrobot_can_bus_v2_0
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:goals: build
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.. _DFRobot Website:
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https://www.dfrobot.com/product-1444.html
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.. _DFRobot CAN BUS Shield V2.0 schematic:
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https://github.com/DFRobot/CAN_BUS/blob/master/DFR0370%20CAN%20BUS%20sheild(V2.0).pdf
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.. _MCP2515 Datasheet:
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http://ww1.microchip.com/downloads/en/DeviceDoc/MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf
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.. _TJA1050 Datasheet:
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https://www.nxp.com/docs/en/data-sheet/TJA1050.pdf

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