CANbus objects

Supports standard, extended, and remote frames.

Includes:

A stand-alone writer, requiring one cog
A stand-alone reader that reads up to 1Mbps but requires two cogs
A stand-alone reader that reads up to 500Kbps but only requires one cog
A combined reader/writer that operates at 500Kbps, requires one cog but works haltingly on high-traffic busses
And a demonstration showing how everything works together

These objects only produce a logic-level output, in order to connect to a CANbus, a line driver such as the MCP2551 is required.