canis-hw

Isolated USB CAN-FD interface with SW-controllable termination resistors

Features

• 2xCAN-FD interfaces supporting 8Mb/s
• 3kV isolation
• SW-controllable CAN-termination resistors
• 24V tolerant CAN transceivers and CAN termination circuit
• USB Type-C connector
• 2-layer PCB design
• Easy to solder 0603 components

Firmware

Please use this candleLight_fw fork(canis branch).
Prebuilt binary canis_fw.bin can be found in releases.

Flashing via DFU

• Short J2 pins 1 and 2
• Connect USB to the host PC
• Unshort J2
• In the lsusb output you should be able to see STMicroelectronics STM Device in DFU Mode
• Run sudo dfu-util -d 0483:df11 -c 1 -i 0 -a 0 -s 0x08000000 -D canis_fw.bin
• Reconnect USB
• In the lsusb output you should be able to see OpenMoko, Inc. Geschwister Schneider CAN adapter

Flashing via SWD

• Connect ST-link to the J2
• Connect USB to the host PC
• Run st-flash write canis_fw.bin 0x08000000
• Disconnect ST-link from J2
• Reconnect USB
• In the lsusb output you should be able to see OpenMoko, Inc. Geschwister Schneider CAN adapter

Usage

Bring up can0 interface and enable 120Ohm termination resistor:

ip link set can0 up type can bitrate 1000000 dbitrate 8000000 fd on termination 120

Disable 120Ohm termination resistor:

ip link set can0 type can termination 0