View source for Development Guidelines:MISRA C

== General Guidelines ==

* Encapsulate and isolate assembly language
* Code shall not be "commented out"
* No use of floating-point arithmetics
* No hiding of identifiers defined in outer scopes
* Typedefs are unique (device_t?)
* Functions shall have prototype declarations
* Local functions should be declared static
* No definitions in header files
* All variables are assigned before use
* All objects should have fully qualified types (''unsigned int'' instead of ''unsigned'')
* We suggest trying to import more such rules, such as additional ones described in [http://www.misra.org.uk/index.htm MISRA-C 2012] (''Guidelines for the use of C in critical systems'')

== Required guidelines ==

=== Assembly language shall be encapsulated and isolated. ===

Assembly instructions should be encapsulated in either assembler functions, C functions or macros.

=== Identifiers in inner scopes shall not shadow identifiers in outer scopes ===

=== '''char''' shall be used only for the storage and use of character values ===