Canis Labs CANPico Shield

Overview

The Canis Labs CANPico shield supports the Microchip MCP2517FD or MCP2518FD stand-alone CAN controller and Microchip MCP2562FD high-speed CAN FD transceiver. The CANPico is a carrier board in a ‘sock’ format for a Raspberry Pi Pico family.

Hardware

• MCP2517/2518FD

  • External CAN FD Controller with Serial Peripheral Interface (SPI)

  • Arbitration Bit Rate up to 1 Mbps

  • Data Bit Rate up to 8 Mbps

  • CAN FD Controller modes: CAN 2.0B Mode or Mixed CAN 2.0B and CAN FD Mode

  • Conforms to ISO 11898-1:2015

• MCP2562FD

  • Optimized for CAN FD (Flexible Data rate) at 2, 5 and 8 Mbps Operation

  • Maximum Propagation Delay: 120 ns

  • Implements ISO-11898-2 and ISO-11898-5 Standard Physical Layer Requirements

  • Very Low Standby Current (5 µA, typical)

  • VIO Supply Pin to Interface Directly to CAN Controllers and Microcontrollers with 1.8V to 5.5V I/O

• Connectivity

  • Jumper header to enable a 120W CAN bus termination resistor

  • Jumper header to enable the CAN TX line to the transceiver

  • Screw terminal connector to CAN bus

  • CAN controller interrupt and Start-of-Frame inputs to GPIO pins

  • Direct access via GPIO pins to the CAN transceiver Tx and Rx pins

  • Test instrument header (for an oscilloscope or logic analyzer)

Name	Function	Usage
GP0	None
GP1	None
GP2	TRIG	Programmable trigger
GP3	STBY	Transceiver standby
GP4	SOF	Clock/SOF
GP5	IRQ	Transceiver interrupt
GP6	None	SPI CS
GP7	None
GP8	SPI1_Rx	SPI Rx
GP9	None
GP10	SPI1_SCK	SPI clock
GP11	SPI1_Tx	SPI Tx
GP12	None
GP13	None
GP14	None
GP15	None
GP16	None
GP17	None
GP18	None
GP19	None
GP20	None
GP21	Rx	CAN Rx data
GP22	Tx	CAN Tx data
GP23	None
GP24	None
GP25	None
GP26	None
GP27	None
GP28	None

• Test header

  • TRIG: Programmable trigger output

  • Tx: Logic-level CAN Tx data

  • Rx: Logic-level CAN Rx data

  • H: Raw CAN-Hi signal

  • L: Raw CAN-Low signal

• Power Supply

  • 3.3V ~ 5V

• Components

  • Tx Enable jumper

  • 120 ohm terminator jumper

For more information about the Canis Labs CANPico shield:

• Canis Labs Website

• CANPico CAN Bus Shield

• MCP2517FD Datasheet

• MCP2518FD Datasheet

• MCP2562FD Datasheet

Programming

Set --shield canis-canpico when you invoke west build or cmake in your Zephyr application. For example:

Using west:

# From the root of the zephyr repository
west build -b rpi_pico --shield canpico samples/drivers/can/counter
west flash

Using CMake and ninja:

# From the root of the zephyr repository
# Use cmake to configure a Ninja-based buildsystem:
cmake -Bbuild -GNinja -DBOARD=rpi_pico -DSHIELD="canpico" samples/drivers/can/counter

# Now run the build tool on the generated build system:
ninja -Cbuild
ninja -Cbuild flash