CANBus logger using Arduino and MCP2515/MCP2551.

Hardware

• Arduino Duemilanove
• MCP2551 CAN transceiver
• MCP2515 CAN controller

I used schematics based on SparkFun's CANBus shield: http://www.sparkfun.com/datasheets/DevTools/Arduino/canbus_shield-v12.pdf

Software

• CAN library from Steven (http://modelrail.otenko.com/arduino/arduino-controller-area-network-can)
• Simple Arduino program which sends received CAN messages via serial port @ 115200 baud to PC
• GUI in Python which handles selection of CANBus baud rate and receiving messages.

GUI requirements

• Python 2.7
• pyserial
• wxpython

Hardware connections

  Arduino pin   MCP2515 pin (DIP18)
  2				reset, 17

  SPI interface
  10 			cs, 16
  11 			si, 14
  12 			so, 15
  13			sck, 13

Usage

• Connect hardware
• Upload Arduino program. I use scons build system, so I don't know (nor care) if it compiles in brain-dead Arduino IDE.
• Launch GUI by running python logger.py. Select serial port, CAN bitrate and connect.

Credits

• SparkFun for their CANBus shield schematics
• Steven for his thorough description of CANBus usage with Arduino (http://modelrail.otenko.com/arduino/arduino-controller-area-network-can)