By Michael Barr

Netrino's Embedded C Coding general was once constructed from the floor as much as reduce insects in firmware, by means of targeting functional ideas that continue insects out-while additionally enhancing the maintainability and portability of embedded software program. The coding usual information a collection of guiding rules (more less than) in addition to particular naming conventions and different ideas for using info kinds, features, preprocessor macros, variables and lots more and plenty extra. person principles which were verified to minimize or get rid of particular types of insects are highlighted.

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No block of temporarily disabled code shall remain in the source code of a release candidate. 2, which we feel will not affect the number or severity of firmware bugs. The C++ “single-line” style makes comments easier to align and maintain. In addition this deviation is consistent with our choice of the [C99] language, which officially added single-line comments to the C language. com ii. 7 In this way, useful debug code may be maintained in production code, as the ability to gather additional information is often desirable long after development is done.

1 Naming Conventions Rules: a. The names of all new data types, including structures, unions, and enumerations, shall consist only of lowercase characters and internal underscores and end with ‘_t’. b. All new structures, unions, and enumerations shall be named via a typedef. com Reasoning: Type names and variable names are often appropriately similar. For example, a set of timer control registers in a peripheral calls out to be named ‘timer’. To distinguish the structure definition that defines the register layout, it is valuable to create a new type with a distinct name, such as ‘timer_t’.

NOTE:” provides descriptive comments about the “why” of a chunk of code—as distinguished from the “how” usually placed in comments. For example, that a chunk of driver code deviates from the datasheet because there was an errata in the chip. Or that an assumption is being made by the original programmer. iii. “TODO:” indicates an area of the code is still under construction and explains what remains to be done. , “MJB TODO:”). com Example: // Step 1: Batten down the hatches. for (int hatch = 0; hatch < NUM_HATCHES; hatch++) { if (hatch_is_open(hatches[hatch]) { hatch_close(hatches[hatch]); } } // Step 2: Raise the mizzenmast.

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