Make volatile Frame work, remove hardcoded relay/switch enumeration values
Update spreadsheet with actual parameter values
Simplify relay slave, move logic into the main loop
Add const frame support
more const support
Buffer frames in the master
Refactor LIN slave into separate device + slave modules
Subclass Frame for setting relay bits, tinker with relay/switch definitions
Add a wrapper around the MC33972 driver that understands switch assignments
Add basic switch handling logic
Adjust relay/switch assignments
Unassigned switch/relays are 0xff
Hardcode ignition input on SP0
Don't try to track assignment numbers just yet