Disable the LIN_x_set_type macros; the 2x variant doesn't clear 1x mode.
Avoid a LINCS glitch when sleeping
A very simple LIN dumper

Connect the serial device to pin 1 on any AVR on the bus.
Perform parameter access using the ISO 14229 methods

Fixes #33

Since 14229-7 is not generally available, this was derived from

http://unifieddiagnosticservices.blogspot.com/2011/12/automotive-diagnos
tics-services.html

on the assumption that the frame layout would be something similarly
sensible.

Also made simplifications to the master’s frame schedule. There is room
for optimisation here