Coding Conventions

Coding Conventions

 

This section indicates the coding conventions used in the sample applications and modules included as source code.

File Organization

A typical sample application source code file is organized as follows:

 

Module Variables

By convention, the variables of a module are grouped into a structure declared globally at the beginning of the file.

This convention has several advantages:

  • It reduces name collision with variables from other modules.

  • It allows a developer to watch all the variables at once during debug by watching a single structure.

  • It allows different functions to easily access the same variables without requiring pointers to be passed between functions.

  • The stack space does not need to change when variables are added/removed, since modules variables are statically allocated rather than allocated from a task's stack.

  • This structure can include the declaration of the stack space for different tasks, which need to be done globally.

Kernel header

The "kernel header" is a set of bytes pre-pended to the binary image of your application. It needs to be present for your application to start running. All sample application files contain the code to install a kernel header. You can reuse that code when creating your own applications.

Miscellaneous Conventions

  • 4 spaces are used for indentation. Tabs are never used.

  • Source code is written to not exceed a width of 80 columns.

  • Selected functions are commented using Doxygen syntax.