LEVCAN

Light Electric Vehicle CAN protocol

Some ideas taken from J1939 and CanOpen

Uses 29bit CAN network (1MBps default), check dev branches for latest builds.

Features

• Two transmission modes, "TCP" (controlled reception and data order) and "UDP"
• Notifications for user
• Dynamic network address
• Configurable parameters for devices
• Simple file i/o with file server
• Static and dynamic memory supported
• Up to 125 devices on bus
• 10 bit message ID + length matching
• Broadcast and adressed messages

System requirements

• C11
• Little endian
• 8bit = int8_t
• RTOS recommended for faster responce and needed for advanced features
• Binary size for gcc -O2 on Cortex M4:

Low level info

Each message that is sent by a Node contains source address. There are 128 possible addresses:

• 0..126 – Valid source addresses for Node
• 0..63 – Used for Node with Preferred Addresses
• 64...125 – Available for all Node
• 126 – Null (not set)
• 127 – Global

CAN 1Mbps 7812.5 msg/s at 8byte (total msg 128 bit) 62500 data bytes max