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| <div class="title">MISRA-C Deviations </div> </div> |
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| <div class="textblock"><p>CMSIS-Core (Cortex-M) uses the common coding rules for CMSIS components that are documented under <a href="../../General/html/index.html"><b>Introduction</b></a>.</p> |
| <p>CMSIS-Core (Cortex-M) violates the following MISRA-C:2004 rules:</p> |
| <ul> |
| <li>Required Rule 8.5, object/function definition in header file.<br/> |
| Violated since function definitions in header files are used for function inlining'.</li> |
| <li>Advisory Rule 12.4, Side effects on right hand side of logical operator.<br/> |
| Violated because volatile is used for core register definitions.</li> |
| <li>Advisory Rule 14.7, Return statement before end of function.<br/> |
| Violated to simplify code logic.</li> |
| <li>Required Rule 18.4, declaration of union type or object of union type: '{...}'.<br/> |
| Violated since unions are used for effective representation of core registers.</li> |
| <li>Advisory Rule 19.4, Disallowed definition for macro.<br/> |
| Violated since macros are used for assembler keywords.</li> |
| <li>Advisory Rule 19.7, Function-like macro defined.<br/> |
| Violated since function-like macros are used to generate more efficient code.</li> |
| <li>Advisory Rule 19.16, all preprocessing directives must be valid.<br/> |
| Violated to set default settings for macros.</li> |
| </ul> |
| <p>CMSIS-Core (Cortex-M) violates the following MISRA-C:2012 rules:</p> |
| <ul> |
| <li>Directive 4.9, function-like macro defined.<br/> |
| Violated since function-like macros are used to generate more efficient code.</li> |
| <li>Rule 1.3, multiple use of '#/##' operators in macro definition.<br/> |
| Violated since function-like macros are used to generate more efficient code.</li> |
| <li>Rule 11.4, conversion between a pointer and integer type.<br/> |
| Violated because of core register access.</li> |
| <li>Rule 11.6, cast from unsigned long to pointer.<br/> |
| Violated because of core register access.</li> |
| <li>Rule 13.5, side effects on right hand side of logical operator.<br/> |
| Violated because of shift operand is used in macros and functions.</li> |
| <li>Rule 14.4, conditional expression should have essentially Boolean type.<br/> |
| Violated since macros with several instructions are used.</li> |
| <li>Rule 15.5, return statement before end of function.<br/> |
| Violated to simplify code logic.</li> |
| <li>Rule 20.10, '#/##' operators used.<br/> |
| Violated since function-like macros are used to generate more efficient code.</li> |
| <li>Rule 21.1, reserved to the compiler.<br/> |
| Violated since macros with leading underscores are used.</li> |
| </ul> |
| <p><device>.h files generated by <b>SVDConv.exe</b> violate the following MISRA-C:2004 rules:</p> |
| <ul> |
| <li>Advisory Rule 20.2, Re-use of C90 identifier pattern.<br/> |
| Violated since CMSIS macros begin with '__'. Since CMSIS is developed and verified with various compilers this approach is acceptable and avoids conflicts with user symbols.</li> |
| <li>Advisory Rule 19.1, Declaration before #include.<br/> |
| Violated since Interrupt Number Definition Type (IRQn_Type) must be defined before including the core header file. </li> |
| </ul> |
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