Barr Group's Embedded C Coding Standard was developed from the ground up to minimize bugs in firmware, by focusing on practical rules that keep bugs out, while also improving the maintainability and portability of embedded software. The coding standard book details a set of guiding principles as well as specific naming conventions and other rules for the use of data types, functions, preprocessor macros, variables and much more. Individual rules that have been demonstrated to reduce or eliminate certain types of bugs are highlighted.
Verrrrrry old school. Looks like 1980's code. I guess it's job security for someone if you make the coding standard to continue making it difficult for anyone else to work on. Oh, and "use spaces not tabs". :(