LIN

This is a LIN (http://en.wikipedia.org/wiki/Local_Interconnect_Network) protocol master implementation that supports LIN 1.X or LIN 2.X frame types.

It is built on top of the "Arduino" Serial and digital IO APIs. These "underface" APIs form a useful abstraction layer for any chip. So its better to implement them for your new microcontroller and then get LIN for free using this library than to implement LIN over a raw register set.

The library supports injection of immediate LIN frames, or a "skew heap" based schedule table. The skew heap schedule table differs from what is suggested by the LIN specification (which defines a linked list of LIN frames and time intervals between them). This implementation provides a similar "pile" of LIN frames, but instead of being a static list, the skew heap essentially dynamically sorts the frames to find the next scheduled frame. This allows frames to be easily inserted and removed from the schedule, and frame interval periods (the time between 2 issues of the same frame) to be changed dynamically. It also means that the frame interval period does not depend on the total length of the schedule table (as it does for the specced linked list implementation) which eliminates an unnecessary interaction between otherwise independent LIN devices.

The library was tested on a Lightuino 5 (Arduino Duemilanove/Uno compatible board) using a LIN slave LED of unknown provenance. So you will have to change the test code to generate frames for whatever LIN device you have on hand.