begriffs open source - cmsis/blob - main/Core/group__compiler__conntrol__gr.html

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  43    <div id="projectname">CMSIS-Core (Cortex-M)
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  52    <div id="projectbrief">CMSIS-Core support for Cortex-M processor-based devices</div>
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 128 <a href="#define-members">Macros</a>  </div>
 129   <div class="headertitle"><div class="title">Compiler Control</div></div>
 130 </div><!--header-->
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 132
 133 <p>Compiler agnostic #define symbols for generic C/C++ source code.
 134 <a href="#details">More...</a></p>
 135 <table class="memberdecls">
 136 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="define-members" name="define-members"></a>
 137 Macros</h2></td></tr>
 138 <tr class="memitem:ga8be4ebde5d4dd91b161d206545ce59aa"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga8be4ebde5d4dd91b161d206545ce59aa">__ARM_ARCH_6M__</a></td></tr>
 139 <tr class="memdesc:ga8be4ebde5d4dd91b161d206545ce59aa"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set to 1 when generating code for Armv6-M (Cortex-M0, Cortex-M1)  <br /></td></tr>
 140 <tr class="separator:ga8be4ebde5d4dd91b161d206545ce59aa"><td class="memSeparator" colspan="2">&#160;</td></tr>
 141 <tr class="memitem:ga43e1af8bedda108dfc4f8584e6b278a2"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga43e1af8bedda108dfc4f8584e6b278a2">__ARM_ARCH_7M__</a></td></tr>
 142 <tr class="memdesc:ga43e1af8bedda108dfc4f8584e6b278a2"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set to 1 when generating code for Armv7-M (Cortex-M3)  <br /></td></tr>
 143 <tr class="separator:ga43e1af8bedda108dfc4f8584e6b278a2"><td class="memSeparator" colspan="2">&#160;</td></tr>
 144 <tr class="memitem:ga43ab3e79ec5ecb615f1f2f6e83e7d48a"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga43ab3e79ec5ecb615f1f2f6e83e7d48a">__ARM_ARCH_7EM__</a></td></tr>
 145 <tr class="memdesc:ga43ab3e79ec5ecb615f1f2f6e83e7d48a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set to 1 when generating code for Armv7-M (Cortex-M4) with FPU.  <br /></td></tr>
 146 <tr class="separator:ga43ab3e79ec5ecb615f1f2f6e83e7d48a"><td class="memSeparator" colspan="2">&#160;</td></tr>
 147 <tr class="memitem:gab3f1284f4cdc6c5e5c9c9d4b8ec29b2a"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gab3f1284f4cdc6c5e5c9c9d4b8ec29b2a">__ARM_ARCH_8M_BASE__</a></td></tr>
 148 <tr class="memdesc:gab3f1284f4cdc6c5e5c9c9d4b8ec29b2a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set to 1 when generating code for Armv8-M Baseline.  <br /></td></tr>
 149 <tr class="separator:gab3f1284f4cdc6c5e5c9c9d4b8ec29b2a"><td class="memSeparator" colspan="2">&#160;</td></tr>
 150 <tr class="memitem:gad424c7143edd08c982dddad0ff65f4cd"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gad424c7143edd08c982dddad0ff65f4cd">__ARM_ARCH_8M_MAIN__</a></td></tr>
 151 <tr class="memdesc:gad424c7143edd08c982dddad0ff65f4cd"><td class="mdescLeft">&#160;</td><td class="mdescRight">Set to 1 when generating code for Armv8-M Mainline.  <br /></td></tr>
 152 <tr class="separator:gad424c7143edd08c982dddad0ff65f4cd"><td class="memSeparator" colspan="2">&#160;</td></tr>
 153 <tr class="memitem:ga1378040bcf22428955c6e3ce9c2053cd"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga1378040bcf22428955c6e3ce9c2053cd">__ASM</a></td></tr>
 154 <tr class="memdesc:ga1378040bcf22428955c6e3ce9c2053cd"><td class="mdescLeft">&#160;</td><td class="mdescRight">Pass information from the compiler to the assembler.  <br /></td></tr>
 155 <tr class="separator:ga1378040bcf22428955c6e3ce9c2053cd"><td class="memSeparator" colspan="2">&#160;</td></tr>
 156 <tr class="memitem:gade2d8d7118f8ff49547f60aa0c3382bb"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gade2d8d7118f8ff49547f60aa0c3382bb">__INLINE</a></td></tr>
 157 <tr class="memdesc:gade2d8d7118f8ff49547f60aa0c3382bb"><td class="mdescLeft">&#160;</td><td class="mdescRight">Recommend that function should be inlined by the compiler.  <br /></td></tr>
 158 <tr class="separator:gade2d8d7118f8ff49547f60aa0c3382bb"><td class="memSeparator" colspan="2">&#160;</td></tr>
 159 <tr class="memitem:gaba87361bfad2ae52cfe2f40c1a1dbf9c"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a></td></tr>
 160 <tr class="memdesc:gaba87361bfad2ae52cfe2f40c1a1dbf9c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Define a static function that may be inlined by the compiler.  <br /></td></tr>
 161 <tr class="separator:gaba87361bfad2ae52cfe2f40c1a1dbf9c"><td class="memSeparator" colspan="2">&#160;</td></tr>
 162 <tr class="memitem:gab904513442afdf77d4f8c74f23cbb040"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gab904513442afdf77d4f8c74f23cbb040">__STATIC_FORCEINLINE</a></td></tr>
 163 <tr class="memdesc:gab904513442afdf77d4f8c74f23cbb040"><td class="mdescLeft">&#160;</td><td class="mdescRight">Define a static function that should be always inlined by the compiler.  <br /></td></tr>
 164 <tr class="separator:gab904513442afdf77d4f8c74f23cbb040"><td class="memSeparator" colspan="2">&#160;</td></tr>
 165 <tr class="memitem:ga153a4a31b276a9758959580538720a51"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga153a4a31b276a9758959580538720a51">__NO_RETURN</a></td></tr>
 166 <tr class="memdesc:ga153a4a31b276a9758959580538720a51"><td class="mdescLeft">&#160;</td><td class="mdescRight">Inform the compiler that a function does not return.  <br /></td></tr>
 167 <tr class="separator:ga153a4a31b276a9758959580538720a51"><td class="memSeparator" colspan="2">&#160;</td></tr>
 168 <tr class="memitem:ga378ac21329d33f561f90265eef89f564"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga378ac21329d33f561f90265eef89f564">__RESTRICT</a></td></tr>
 169 <tr class="memdesc:ga378ac21329d33f561f90265eef89f564"><td class="mdescLeft">&#160;</td><td class="mdescRight">restrict pointer qualifier to enable additional optimizations.  <br /></td></tr>
 170 <tr class="separator:ga378ac21329d33f561f90265eef89f564"><td class="memSeparator" colspan="2">&#160;</td></tr>
 171 <tr class="memitem:ga3e40e4c553fc11588f7a4c2a19e789e0"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga3e40e4c553fc11588f7a4c2a19e789e0">__USED</a></td></tr>
 172 <tr class="memdesc:ga3e40e4c553fc11588f7a4c2a19e789e0"><td class="mdescLeft">&#160;</td><td class="mdescRight">Inform that a variable shall be retained in executable image.  <br /></td></tr>
 173 <tr class="separator:ga3e40e4c553fc11588f7a4c2a19e789e0"><td class="memSeparator" colspan="2">&#160;</td></tr>
 174 <tr class="memitem:gac607bf387b29162be6a9b77fc7999539"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gac607bf387b29162be6a9b77fc7999539">__WEAK</a></td></tr>
 175 <tr class="memdesc:gac607bf387b29162be6a9b77fc7999539"><td class="mdescLeft">&#160;</td><td class="mdescRight">Export a function or variable weakly to allow overwrites.  <br /></td></tr>
 176 <tr class="separator:gac607bf387b29162be6a9b77fc7999539"><td class="memSeparator" colspan="2">&#160;</td></tr>
 177 <tr class="memitem:gabe8996d3d985ee1529475443cc635bf1"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gabe8996d3d985ee1529475443cc635bf1">__PACKED</a></td></tr>
 178 <tr class="memdesc:gabe8996d3d985ee1529475443cc635bf1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Request smallest possible alignment.  <br /></td></tr>
 179 <tr class="separator:gabe8996d3d985ee1529475443cc635bf1"><td class="memSeparator" colspan="2">&#160;</td></tr>
 180 <tr class="memitem:ga4dbb70fab85207c27b581ecb6532b314"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga4dbb70fab85207c27b581ecb6532b314">__PACKED_STRUCT</a></td></tr>
 181 <tr class="memdesc:ga4dbb70fab85207c27b581ecb6532b314"><td class="mdescLeft">&#160;</td><td class="mdescRight">Request smallest possible alignment for a structure.  <br /></td></tr>
 182 <tr class="separator:ga4dbb70fab85207c27b581ecb6532b314"><td class="memSeparator" colspan="2">&#160;</td></tr>
 183 <tr class="memitem:gabe8693a7200e573101551d49a1772fb9"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gabe8693a7200e573101551d49a1772fb9">__UNALIGNED_UINT16_READ</a></td></tr>
 184 <tr class="memdesc:gabe8693a7200e573101551d49a1772fb9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Pointer for unaligned read of a uint16_t variable.  <br /></td></tr>
 185 <tr class="separator:gabe8693a7200e573101551d49a1772fb9"><td class="memSeparator" colspan="2">&#160;</td></tr>
 186 <tr class="memitem:gadb9cd73446f7e11e92383cd327a23407"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gadb9cd73446f7e11e92383cd327a23407">__UNALIGNED_UINT16_WRITE</a></td></tr>
 187 <tr class="memdesc:gadb9cd73446f7e11e92383cd327a23407"><td class="mdescLeft">&#160;</td><td class="mdescRight">Pointer for unaligned write of a uint16_t variable.  <br /></td></tr>
 188 <tr class="separator:gadb9cd73446f7e11e92383cd327a23407"><td class="memSeparator" colspan="2">&#160;</td></tr>
 189 <tr class="memitem:ga254322c344d954c9f829719a50a88e87"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga254322c344d954c9f829719a50a88e87">__UNALIGNED_UINT32_READ</a></td></tr>
 190 <tr class="memdesc:ga254322c344d954c9f829719a50a88e87"><td class="mdescLeft">&#160;</td><td class="mdescRight">Pointer for unaligned read of a uint32_t variable.  <br /></td></tr>
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 193 <tr class="memdesc:gabb2180285c417aa9120a360c51f64b4b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Pointer for unaligned write of a uint32_t variable.  <br /></td></tr>
 194 <tr class="separator:gabb2180285c417aa9120a360c51f64b4b"><td class="memSeparator" colspan="2">&#160;</td></tr>
 195 <tr class="memitem:ga0c58caa5a273e2c21924509a45f8b849"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga0c58caa5a273e2c21924509a45f8b849">__ALIGNED</a></td></tr>
 196 <tr class="memdesc:ga0c58caa5a273e2c21924509a45f8b849"><td class="mdescLeft">&#160;</td><td class="mdescRight">Minimum alignment for a variable.  <br /></td></tr>
 197 <tr class="separator:ga0c58caa5a273e2c21924509a45f8b849"><td class="memSeparator" colspan="2">&#160;</td></tr>
 198 <tr class="memitem:ga6f053389e2958b5a239a54d4e4047bf5"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga6f053389e2958b5a239a54d4e4047bf5">__COMPILER_BARRIER</a></td></tr>
 199 <tr class="memdesc:ga6f053389e2958b5a239a54d4e4047bf5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Barrier to prevent compiler from reordering instructions.  <br /></td></tr>
 200 <tr class="separator:ga6f053389e2958b5a239a54d4e4047bf5"><td class="memSeparator" colspan="2">&#160;</td></tr>
 201 <tr class="memitem:ga541e3bdeb73ef92c9a18ea2f7082bf5d"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga541e3bdeb73ef92c9a18ea2f7082bf5d">__NO_INIT</a></td></tr>
 202 <tr class="memdesc:ga541e3bdeb73ef92c9a18ea2f7082bf5d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Specifies a section name for a variable to simplify variable placement into a non-initialized memory.  <br /></td></tr>
 203 <tr class="separator:ga541e3bdeb73ef92c9a18ea2f7082bf5d"><td class="memSeparator" colspan="2">&#160;</td></tr>
 204 <tr class="memitem:gadc1a82527532aabbfa7d8eface645fb5"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gadc1a82527532aabbfa7d8eface645fb5">__ALIAS</a></td></tr>
 205 <tr class="memdesc:gadc1a82527532aabbfa7d8eface645fb5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Creates a symbol as alias to another symbol.  <br /></td></tr>
 206 <tr class="separator:gadc1a82527532aabbfa7d8eface645fb5"><td class="memSeparator" colspan="2">&#160;</td></tr>
 207 <tr class="memitem:ga72db8b026c5e100254080fefabd9fd88"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga72db8b026c5e100254080fefabd9fd88">__PROGRAM_START</a></td></tr>
 208 <tr class="memdesc:ga72db8b026c5e100254080fefabd9fd88"><td class="mdescLeft">&#160;</td><td class="mdescRight">Entry function into the user application or library startup.  <br /></td></tr>
 209 <tr class="separator:ga72db8b026c5e100254080fefabd9fd88"><td class="memSeparator" colspan="2">&#160;</td></tr>
 210 <tr class="memitem:ga1002e751427b1189f92787d4e4eef965"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga1002e751427b1189f92787d4e4eef965">__INITIAL_SP</a></td></tr>
 211 <tr class="memdesc:ga1002e751427b1189f92787d4e4eef965"><td class="mdescLeft">&#160;</td><td class="mdescRight">Compiler/linker symbol specifying the location of the main stack (MSP).  <br /></td></tr>
 212 <tr class="separator:ga1002e751427b1189f92787d4e4eef965"><td class="memSeparator" colspan="2">&#160;</td></tr>
 213 <tr class="memitem:ga84b0bad4aa39632d3faea46aa1e102a8"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga84b0bad4aa39632d3faea46aa1e102a8">__STACK_LIMIT</a></td></tr>
 214 <tr class="memdesc:ga84b0bad4aa39632d3faea46aa1e102a8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Compiler/linker symbol specifying the limit of the main stack (MSP).  <br /></td></tr>
 215 <tr class="separator:ga84b0bad4aa39632d3faea46aa1e102a8"><td class="memSeparator" colspan="2">&#160;</td></tr>
 216 <tr class="memitem:gab94ebeb20055f1848d7b707d3c7cfc5d"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#gab94ebeb20055f1848d7b707d3c7cfc5d">__VECTOR_TABLE</a></td></tr>
 217 <tr class="memdesc:gab94ebeb20055f1848d7b707d3c7cfc5d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Symbol name used for the (static) interrupt vector table.  <br /></td></tr>
 218 <tr class="separator:gab94ebeb20055f1848d7b707d3c7cfc5d"><td class="memSeparator" colspan="2">&#160;</td></tr>
 219 <tr class="memitem:ga4f65c96effa79fbd610fea43ee7d745b"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__compiler__conntrol__gr.html#ga4f65c96effa79fbd610fea43ee7d745b">__VECTOR_TABLE_ATTRIBUTE</a></td></tr>
 220 <tr class="memdesc:ga4f65c96effa79fbd610fea43ee7d745b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Additional decl specs to be used when defining the (static) interrupt vector table.  <br /></td></tr>
 221 <tr class="separator:ga4f65c96effa79fbd610fea43ee7d745b"><td class="memSeparator" colspan="2">&#160;</td></tr>
 222 </table>
 223 <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
 224 <p>Compiler agnostic #define symbols for generic C/C++ source code. </p>
 225 <p>The CMSIS-Core provides the header file <b>cmsis_compiler.h</b> with consistent #define symbols for generate C or C++ source files that should be compiler agnostic. Each CMSIS compliant compiler should support the functionality described in this section.</p>
 226 <p>The header file <b>cmsis_compiler.h</b> is also included by each <a class="el" href="device_h_pg.html">Device Header File &lt;Device.h&gt;</a> so that these definitions are available. </p>
 227 <h2 class="groupheader">Macro Definition Documentation</h2>
 228 <a id="gadc1a82527532aabbfa7d8eface645fb5" name="gadc1a82527532aabbfa7d8eface645fb5"></a>
 229 <h2 class="memtitle"><span class="permalink"><a href="#gadc1a82527532aabbfa7d8eface645fb5">&#9670;&#160;</a></span>__ALIAS</h2>
 230
 231 <div class="memitem">
 232 <div class="memproto">
 233       <table class="memname">
 234         <tr>
 235           <td class="memname">#define __ALIAS</td>
 236         </tr>
 237       </table>
 238 </div><div class="memdoc">
 239
 240 <p>Creates a symbol as alias to another symbol. </p>
 241 <p><b>Code Example:</b> The example declares the function Interrupt0_Handler. By default it is just an alias pointing to Default_Handler. In combination with __WEAK modifier this allows giving the function definition at a later point if required.</p>
 242 <div class="fragment"><div class="line"><span class="keywordtype">void</span> Interrupt0_Handler     (<span class="keywordtype">void</span>) <a class="code hl_define" href="group__compiler__conntrol__gr.html#gac607bf387b29162be6a9b77fc7999539">__WEAK</a> <a class="code hl_define" href="group__compiler__conntrol__gr.html#gadc1a82527532aabbfa7d8eface645fb5">__ALIAS</a>(<span class="stringliteral">&quot;Default_Handler&quot;</span>);</div>
 243 <div class="ttc" id="agroup__compiler__conntrol__gr_html_gac607bf387b29162be6a9b77fc7999539"><div class="ttname"><a href="group__compiler__conntrol__gr.html#gac607bf387b29162be6a9b77fc7999539">__WEAK</a></div><div class="ttdeci">#define __WEAK</div><div class="ttdoc">Export a function or variable weakly to allow overwrites.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:242</div></div>
 244 <div class="ttc" id="agroup__compiler__conntrol__gr_html_gadc1a82527532aabbfa7d8eface645fb5"><div class="ttname"><a href="group__compiler__conntrol__gr.html#gadc1a82527532aabbfa7d8eface645fb5">__ALIAS</a></div><div class="ttdeci">#define __ALIAS</div><div class="ttdoc">Creates a symbol as alias to another symbol.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:439</div></div>
 245 </div><!-- fragment -->
 246 </div>
 247 </div>
 248 <a id="ga0c58caa5a273e2c21924509a45f8b849" name="ga0c58caa5a273e2c21924509a45f8b849"></a>
 249 <h2 class="memtitle"><span class="permalink"><a href="#ga0c58caa5a273e2c21924509a45f8b849">&#9670;&#160;</a></span>__ALIGNED</h2>
 250
 251 <div class="memitem">
 252 <div class="memproto">
 253       <table class="memname">
 254         <tr>
 255           <td class="memname">#define __ALIGNED</td>
 256         </tr>
 257       </table>
 258 </div><div class="memdoc">
 259
 260 <p>Minimum alignment for a variable. </p>
 261 <p>Specifies a minimum alignment for a variable or structure field, measured in bytes.</p>
 262 <p><b>Code Example:</b> </p><div class="fragment"><div class="line">uint32_t stack_space[0x100] <a class="code hl_define" href="group__compiler__conntrol__gr.html#ga0c58caa5a273e2c21924509a45f8b849">__ALIGNED</a>(8);   <span class="comment">// 8-byte alignment required</span></div>
 263 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga0c58caa5a273e2c21924509a45f8b849"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga0c58caa5a273e2c21924509a45f8b849">__ALIGNED</a></div><div class="ttdeci">#define __ALIGNED</div><div class="ttdoc">Minimum alignment for a variable.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:378</div></div>
 264 </div><!-- fragment -->
 265 </div>
 266 </div>
 267 <a id="ga8be4ebde5d4dd91b161d206545ce59aa" name="ga8be4ebde5d4dd91b161d206545ce59aa"></a>
 268 <h2 class="memtitle"><span class="permalink"><a href="#ga8be4ebde5d4dd91b161d206545ce59aa">&#9670;&#160;</a></span>__ARM_ARCH_6M__</h2>
 269
 270 <div class="memitem">
 271 <div class="memproto">
 272       <table class="memname">
 273         <tr>
 274           <td class="memname">#define __ARM_ARCH_6M__</td>
 275         </tr>
 276       </table>
 277 </div><div class="memdoc">
 278
 279 <p>Set to 1 when generating code for Armv6-M (Cortex-M0, Cortex-M1) </p>
 280 <p>The <b>#define <b>ARM_ARCH_6M</b></b> is set to 1 when generating code for the Armv6-M architecture. This architecture is for example used by the Cortex-M0, Cortex-M0+, and Cortex-M1 processor. </p>
 281
 282 </div>
 283 </div>
 284 <a id="ga43ab3e79ec5ecb615f1f2f6e83e7d48a" name="ga43ab3e79ec5ecb615f1f2f6e83e7d48a"></a>
 285 <h2 class="memtitle"><span class="permalink"><a href="#ga43ab3e79ec5ecb615f1f2f6e83e7d48a">&#9670;&#160;</a></span>__ARM_ARCH_7EM__</h2>
 286
 287 <div class="memitem">
 288 <div class="memproto">
 289       <table class="memname">
 290         <tr>
 291           <td class="memname">#define __ARM_ARCH_7EM__</td>
 292         </tr>
 293       </table>
 294 </div><div class="memdoc">
 295
 296 <p>Set to 1 when generating code for Armv7-M (Cortex-M4) with FPU. </p>
 297 <p>The <b>#define <b>ARM_ARCH_7EM</b></b> is set to 1 when generating code for the Armv7-M architecture with floating point extension. This architecture is for example used by the Cortex-M4 processor with FPU </p>
 298
 299 </div>
 300 </div>
 301 <a id="ga43e1af8bedda108dfc4f8584e6b278a2" name="ga43e1af8bedda108dfc4f8584e6b278a2"></a>
 302 <h2 class="memtitle"><span class="permalink"><a href="#ga43e1af8bedda108dfc4f8584e6b278a2">&#9670;&#160;</a></span>__ARM_ARCH_7M__</h2>
 303
 304 <div class="memitem">
 305 <div class="memproto">
 306       <table class="memname">
 307         <tr>
 308           <td class="memname">#define __ARM_ARCH_7M__</td>
 309         </tr>
 310       </table>
 311 </div><div class="memdoc">
 312
 313 <p>Set to 1 when generating code for Armv7-M (Cortex-M3) </p>
 314 <p>The <b>#define <b>ARM_ARCH_7M</b></b> is set to 1 when generating code for the Armv7-M architecture. This architecture is for example used by the Cortex-M3 processor. </p>
 315
 316 </div>
 317 </div>
 318 <a id="gab3f1284f4cdc6c5e5c9c9d4b8ec29b2a" name="gab3f1284f4cdc6c5e5c9c9d4b8ec29b2a"></a>
 319 <h2 class="memtitle"><span class="permalink"><a href="#gab3f1284f4cdc6c5e5c9c9d4b8ec29b2a">&#9670;&#160;</a></span>__ARM_ARCH_8M_BASE__</h2>
 320
 321 <div class="memitem">
 322 <div class="memproto">
 323       <table class="memname">
 324         <tr>
 325           <td class="memname">#define __ARM_ARCH_8M_BASE__</td>
 326         </tr>
 327       </table>
 328 </div><div class="memdoc">
 329
 330 <p>Set to 1 when generating code for Armv8-M Baseline. </p>
 331 <p>The <b>#define <b>ARM_ARCH_8M_BASE</b></b> is set to 1 when generating code for the Armv8-M architecture baseline variant. </p>
 332
 333 </div>
 334 </div>
 335 <a id="gad424c7143edd08c982dddad0ff65f4cd" name="gad424c7143edd08c982dddad0ff65f4cd"></a>
 336 <h2 class="memtitle"><span class="permalink"><a href="#gad424c7143edd08c982dddad0ff65f4cd">&#9670;&#160;</a></span>__ARM_ARCH_8M_MAIN__</h2>
 337
 338 <div class="memitem">
 339 <div class="memproto">
 340       <table class="memname">
 341         <tr>
 342           <td class="memname">#define __ARM_ARCH_8M_MAIN__</td>
 343         </tr>
 344       </table>
 345 </div><div class="memdoc">
 346
 347 <p>Set to 1 when generating code for Armv8-M Mainline. </p>
 348 <p>The <b>#define <b>ARM_ARCH_8M_MAIN</b></b> is set to 1 when generating code for the Armv8-M architecture mainline variant. </p>
 349
 350 </div>
 351 </div>
 352 <a id="ga1378040bcf22428955c6e3ce9c2053cd" name="ga1378040bcf22428955c6e3ce9c2053cd"></a>
 353 <h2 class="memtitle"><span class="permalink"><a href="#ga1378040bcf22428955c6e3ce9c2053cd">&#9670;&#160;</a></span>__ASM</h2>
 354
 355 <div class="memitem">
 356 <div class="memproto">
 357       <table class="memname">
 358         <tr>
 359           <td class="memname">#define __ASM</td>
 360         </tr>
 361       </table>
 362 </div><div class="memdoc">
 363
 364 <p>Pass information from the compiler to the assembler. </p>
 365 <p>The <b>__ASM</b> keyword can declare or define an embedded assembly function or incorporate inline assembly into a function (shown in the code example below).</p>
 366 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="comment">// Reverse bit order of value</span></div>
 367 <div class="line"> </div>
 368 <div class="line">__attribute__( ( always_inline ) ) <a class="code hl_define" href="group__compiler__conntrol__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a> uint32_t <a class="code hl_function" href="group__intrinsic__CPU__gr.html#gad6f9f297f6b91a995ee199fbc796b863">__RBIT</a>(uint32_t value)</div>
 369 <div class="line">{</div>
 370 <div class="line">  uint32_t result;</div>
 371 <div class="line"> </div>
 372 <div class="line">   <a class="code hl_define" href="group__compiler__conntrol__gr.html#ga1378040bcf22428955c6e3ce9c2053cd">__ASM</a> <span class="keyword">volatile</span> (<span class="stringliteral">&quot;rbit %0, %1&quot;</span> : <span class="stringliteral">&quot;=r&quot;</span> (result) : <span class="stringliteral">&quot;r&quot;</span> (value) );</div>
 373 <div class="line">   <span class="keywordflow">return</span>(result);</div>
 374 <div class="line">}</div>
 375 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga1378040bcf22428955c6e3ce9c2053cd"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga1378040bcf22428955c6e3ce9c2053cd">__ASM</a></div><div class="ttdeci">#define __ASM</div><div class="ttdoc">Pass information from the compiler to the assembler.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:84</div></div>
 376 <div class="ttc" id="agroup__compiler__conntrol__gr_html_gaba87361bfad2ae52cfe2f40c1a1dbf9c"><div class="ttname"><a href="group__compiler__conntrol__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a></div><div class="ttdeci">#define __STATIC_INLINE</div><div class="ttdoc">Define a static function that may be inlined by the compiler.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:130</div></div>
 377 <div class="ttc" id="agroup__intrinsic__CPU__gr_html_gad6f9f297f6b91a995ee199fbc796b863"><div class="ttname"><a href="group__intrinsic__CPU__gr.html#gad6f9f297f6b91a995ee199fbc796b863">__RBIT</a></div><div class="ttdeci">uint32_t __RBIT(uint32_t value)</div><div class="ttdoc">Reverse bit order of value.</div></div>
 378 </div><!-- fragment -->
 379 </div>
 380 </div>
 381 <a id="ga6f053389e2958b5a239a54d4e4047bf5" name="ga6f053389e2958b5a239a54d4e4047bf5"></a>
 382 <h2 class="memtitle"><span class="permalink"><a href="#ga6f053389e2958b5a239a54d4e4047bf5">&#9670;&#160;</a></span>__COMPILER_BARRIER</h2>
 383
 384 <div class="memitem">
 385 <div class="memproto">
 386       <table class="memname">
 387         <tr>
 388           <td class="memname">#define __COMPILER_BARRIER</td>
 389         </tr>
 390       </table>
 391 </div><div class="memdoc">
 392
 393 <p>Barrier to prevent compiler from reordering instructions. </p>
 394 <p>This barrier limits the compilers reordering optimizations. It prevents the compiler from swapping instructions resulting from code before and after the barrier.</p>
 395 <p><b>Code Example:</b> The assignments in the example are independent. Hence the compiler could choose a different order of execution, e.g. for a better pipeline utilization. Using the barrier in between prevents this type of reordering.</p>
 396 <div class="fragment"><div class="line"><span class="keywordtype">void</span> test (uint8_t *ptr) {</div>
 397 <div class="line">  var1 = 1;</div>
 398 <div class="line">  __COMPILE_BARRIER();</div>
 399 <div class="line">  var2 = var3 + 1;</div>
 400 <div class="line">}</div>
 401 </div><!-- fragment -->
 402 </div>
 403 </div>
 404 <a id="ga1002e751427b1189f92787d4e4eef965" name="ga1002e751427b1189f92787d4e4eef965"></a>
 405 <h2 class="memtitle"><span class="permalink"><a href="#ga1002e751427b1189f92787d4e4eef965">&#9670;&#160;</a></span>__INITIAL_SP</h2>
 406
 407 <div class="memitem">
 408 <div class="memproto">
 409       <table class="memname">
 410         <tr>
 411           <td class="memname">#define __INITIAL_SP</td>
 412         </tr>
 413       </table>
 414 </div><div class="memdoc">
 415
 416 <p>Compiler/linker symbol specifying the location of the main stack (MSP). </p>
 417 <p>The address of the specified symbol is used to initialize the main stack pointer (MSP) during low level init. This is compiler/linker specific. CMSIS specifies common default for supported compilers.</p>
 418 <dl class="section note"><dt>Note</dt><dd>This define is only intended to be used by the <a class="el" href="startup_c_pg.html">Startup File startup_&lt;Device&gt;.c</a>. </dd></dl>
 419
 420 </div>
 421 </div>
 422 <a id="gade2d8d7118f8ff49547f60aa0c3382bb" name="gade2d8d7118f8ff49547f60aa0c3382bb"></a>
 423 <h2 class="memtitle"><span class="permalink"><a href="#gade2d8d7118f8ff49547f60aa0c3382bb">&#9670;&#160;</a></span>__INLINE</h2>
 424
 425 <div class="memitem">
 426 <div class="memproto">
 427       <table class="memname">
 428         <tr>
 429           <td class="memname">#define __INLINE</td>
 430         </tr>
 431       </table>
 432 </div><div class="memdoc">
 433
 434 <p>Recommend that function should be inlined by the compiler. </p>
 435 <p>Inline functions offer a trade-off between code size and performance. By default, the compiler decides during optimization whether to inline code or not. The <b>__INLINE</b> attribute gives the compiler an hint to inline this function. Still, the compiler may decide not to inline the function. As the function is global an callable function is also generated.</p>
 436 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="keyword">const</span> uint32_t led_mask[] = {1U &lt;&lt; 4, 1U &lt;&lt; 5, 1U &lt;&lt; 6, 1U &lt;&lt; 7};</div>
 437 <div class="line"> </div>
 438 <div class="line"><span class="comment">/*------------------------------------------------------------------------------</span></div>
 439 <div class="line"><span class="comment">  Switch on LEDs</span></div>
 440 <div class="line"><span class="comment"> *------------------------------------------------------------------------------*/</span></div>
 441 <div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#gade2d8d7118f8ff49547f60aa0c3382bb">__INLINE</a> <span class="keyword">static</span> <span class="keywordtype">void</span> LED_On (uint32_t led) {</div>
 442 <div class="line"> </div>
 443 <div class="line">  PTD-&gt;PCOR   = led_mask[led];</div>
 444 <div class="line">}</div>
 445 <div class="ttc" id="agroup__compiler__conntrol__gr_html_gade2d8d7118f8ff49547f60aa0c3382bb"><div class="ttname"><a href="group__compiler__conntrol__gr.html#gade2d8d7118f8ff49547f60aa0c3382bb">__INLINE</a></div><div class="ttdeci">#define __INLINE</div><div class="ttdoc">Recommend that function should be inlined by the compiler.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:109</div></div>
 446 </div><!-- fragment -->
 447 </div>
 448 </div>
 449 <a id="ga541e3bdeb73ef92c9a18ea2f7082bf5d" name="ga541e3bdeb73ef92c9a18ea2f7082bf5d"></a>
 450 <h2 class="memtitle"><span class="permalink"><a href="#ga541e3bdeb73ef92c9a18ea2f7082bf5d">&#9670;&#160;</a></span>__NO_INIT</h2>
 451
 452 <div class="memitem">
 453 <div class="memproto">
 454       <table class="memname">
 455         <tr>
 456           <td class="memname">#define __NO_INIT</td>
 457         </tr>
 458       </table>
 459 </div><div class="memdoc">
 460
 461 <p>Specifies a section name for a variable to simplify variable placement into a non-initialized memory. </p>
 462 <p>Specifies a section name (e.g, .bss.noinit or .noinit) for a variable that can be used by a linker-script to position that variable into a non-initialized memory.</p>
 463 <p><b>Code Example:</b> The EventBuffer in the example must not be copy- or zero-initialized. By adding __NO_INIT at variable declaration/definition, and with appropriate linker-script, this variable is positioned into a non-initialized memory.</p>
 464 <div class="fragment"><div class="line"><span class="keyword">static</span> EventRecord_t EventBuffer[EVENT_RECORD_COUNT] <a class="code hl_define" href="group__compiler__conntrol__gr.html#ga541e3bdeb73ef92c9a18ea2f7082bf5d">__NO_INIT</a> <a class="code hl_define" href="group__compiler__conntrol__gr.html#ga0c58caa5a273e2c21924509a45f8b849">__ALIGNED</a>(16);</div>
 465 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga541e3bdeb73ef92c9a18ea2f7082bf5d"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga541e3bdeb73ef92c9a18ea2f7082bf5d">__NO_INIT</a></div><div class="ttdeci">#define __NO_INIT</div><div class="ttdoc">Specifies a section name for a variable to simplify variable placement into a non-initialized memory.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:422</div></div>
 466 </div><!-- fragment -->
 467 </div>
 468 </div>
 469 <a id="ga153a4a31b276a9758959580538720a51" name="ga153a4a31b276a9758959580538720a51"></a>
 470 <h2 class="memtitle"><span class="permalink"><a href="#ga153a4a31b276a9758959580538720a51">&#9670;&#160;</a></span>__NO_RETURN</h2>
 471
 472 <div class="memitem">
 473 <div class="memproto">
 474       <table class="memname">
 475         <tr>
 476           <td class="memname">#define __NO_RETURN</td>
 477         </tr>
 478       </table>
 479 </div><div class="memdoc">
 480
 481 <p>Inform the compiler that a function does not return. </p>
 482 <p>Informs the compiler that the function does not return. The compiler can then perform optimizations by removing code that is never reached.</p>
 483 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="comment">// OS idle demon (running when no other thread is ready to run).</span></div>
 484 <div class="line"> </div>
 485 <div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#ga153a4a31b276a9758959580538720a51">__NO_RETURN</a> <span class="keywordtype">void</span> os_idle_demon (<span class="keywordtype">void</span>);</div>
 486 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga153a4a31b276a9758959580538720a51"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga153a4a31b276a9758959580538720a51">__NO_RETURN</a></div><div class="ttdeci">#define __NO_RETURN</div><div class="ttdoc">Inform the compiler that a function does not return.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:171</div></div>
 487 </div><!-- fragment -->
 488 </div>
 489 </div>
 490 <a id="gabe8996d3d985ee1529475443cc635bf1" name="gabe8996d3d985ee1529475443cc635bf1"></a>
 491 <h2 class="memtitle"><span class="permalink"><a href="#gabe8996d3d985ee1529475443cc635bf1">&#9670;&#160;</a></span>__PACKED</h2>
 492
 493 <div class="memitem">
 494 <div class="memproto">
 495       <table class="memname">
 496         <tr>
 497           <td class="memname">#define __PACKED</td>
 498         </tr>
 499       </table>
 500 </div><div class="memdoc">
 501
 502 <p>Request smallest possible alignment. </p>
 503 <p>Specifies that a type must have the smallest possible alignment.</p>
 504 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="keyword">struct </span>foo {</div>
 505 <div class="line">  uint8_t  u8;</div>
 506 <div class="line">  uint32_t u32[2] <a class="code hl_define" href="group__compiler__conntrol__gr.html#gabe8996d3d985ee1529475443cc635bf1">__PACKED</a>;</div>
 507 <div class="line">};</div>
 508 <div class="ttc" id="agroup__compiler__conntrol__gr_html_gabe8996d3d985ee1529475443cc635bf1"><div class="ttname"><a href="group__compiler__conntrol__gr.html#gabe8996d3d985ee1529475443cc635bf1">__PACKED</a></div><div class="ttdeci">#define __PACKED</div><div class="ttdoc">Request smallest possible alignment.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:260</div></div>
 509 </div><!-- fragment -->
 510 </div>
 511 </div>
 512 <a id="ga4dbb70fab85207c27b581ecb6532b314" name="ga4dbb70fab85207c27b581ecb6532b314"></a>
 513 <h2 class="memtitle"><span class="permalink"><a href="#ga4dbb70fab85207c27b581ecb6532b314">&#9670;&#160;</a></span>__PACKED_STRUCT</h2>
 514
 515 <div class="memitem">
 516 <div class="memproto">
 517       <table class="memname">
 518         <tr>
 519           <td class="memname">#define __PACKED_STRUCT</td>
 520         </tr>
 521       </table>
 522 </div><div class="memdoc">
 523
 524 <p>Request smallest possible alignment for a structure. </p>
 525 <p>Specifies that a structure must have the smallest possible alignment.</p>
 526 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#ga4dbb70fab85207c27b581ecb6532b314">__PACKED_STRUCT</a> foo {</div>
 527 <div class="line">  uint8_t   u8;</div>
 528 <div class="line">  uint32_t  u32;</div>
 529 <div class="line">  uint16_t  u16;</div>
 530 <div class="line">};</div>
 531 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga4dbb70fab85207c27b581ecb6532b314"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga4dbb70fab85207c27b581ecb6532b314">__PACKED_STRUCT</a></div><div class="ttdeci">#define __PACKED_STRUCT</div><div class="ttdoc">Request smallest possible alignment for a structure.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:279</div></div>
 532 </div><!-- fragment -->
 533 </div>
 534 </div>
 535 <a id="ga72db8b026c5e100254080fefabd9fd88" name="ga72db8b026c5e100254080fefabd9fd88"></a>
 536 <h2 class="memtitle"><span class="permalink"><a href="#ga72db8b026c5e100254080fefabd9fd88">&#9670;&#160;</a></span>__PROGRAM_START</h2>
 537
 538 <div class="memitem">
 539 <div class="memproto">
 540       <table class="memname">
 541         <tr>
 542           <td class="memname">#define __PROGRAM_START</td>
 543         </tr>
 544       </table>
 545 </div><div class="memdoc">
 546
 547 <p>Entry function into the user application or library startup. </p>
 548 <p>Gives the function to be jumped into right after low level initialization, i.e. SystemInit. This is compiler and library specific. CMSIS specifies common default for supported compilers.</p>
 549 <dl class="section note"><dt>Note</dt><dd>This define is only intended to be used by the <a class="el" href="startup_c_pg.html">Startup File startup_&lt;Device&gt;.c</a>.</dd></dl>
 550 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="keywordtype">void</span> Reset_Handler(<span class="keywordtype">void</span>)</div>
 551 <div class="line">{</div>
 552 <div class="line">  <a class="code hl_function" href="group__system__init__gr.html#ga93f514700ccf00d08dbdcff7f1224eb2">SystemInit</a>();                             <span class="comment">/* CMSIS System Initialization */</span></div>
 553 <div class="line">  <a class="code hl_define" href="group__compiler__conntrol__gr.html#ga72db8b026c5e100254080fefabd9fd88">__PROGRAM_START</a>();                        <span class="comment">/* Enter PreMain (C library entry point) */</span></div>
 554 <div class="line">}</div>
 555 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga72db8b026c5e100254080fefabd9fd88"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga72db8b026c5e100254080fefabd9fd88">__PROGRAM_START</a></div><div class="ttdeci">#define __PROGRAM_START</div><div class="ttdoc">Entry function into the user application or library startup.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:461</div></div>
 556 <div class="ttc" id="agroup__system__init__gr_html_ga93f514700ccf00d08dbdcff7f1224eb2"><div class="ttname"><a href="group__system__init__gr.html#ga93f514700ccf00d08dbdcff7f1224eb2">SystemInit</a></div><div class="ttdeci">void SystemInit(void)</div><div class="ttdoc">Function to Initialize the system.</div></div>
 557 </div><!-- fragment -->
 558 </div>
 559 </div>
 560 <a id="ga378ac21329d33f561f90265eef89f564" name="ga378ac21329d33f561f90265eef89f564"></a>
 561 <h2 class="memtitle"><span class="permalink"><a href="#ga378ac21329d33f561f90265eef89f564">&#9670;&#160;</a></span>__RESTRICT</h2>
 562
 563 <div class="memitem">
 564 <div class="memproto">
 565       <table class="memname">
 566         <tr>
 567           <td class="memname">#define __RESTRICT</td>
 568         </tr>
 569       </table>
 570 </div><div class="memdoc">
 571
 572 <p>restrict pointer qualifier to enable additional optimizations. </p>
 573 <p>The __RESTRICT keyword corresponds to the <b>restrict</b> pointer qualifier that has been introduced in C99. __RESTRICT is a hint to the compiler that enables additional optimizations. It specifies that for the lifetime of the pointer, only the pointer itself or a value directly derived from it (such as pointer + 1) is used to access the object. The compiler may therefore ignore potential pointer aliasing effects and perform additional optimizations.</p>
 574 <dl class="section note"><dt>Note</dt><dd>For compilers that do not support the restrict keyword, __RESTRICT is defined as an empty macro and a warning is issued.</dd></dl>
 575 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a> <span class="keywordtype">void</span> <a class="code hl_function" href="group__mpu__functions.html#gac1a949403bf84eecaf407003fb553ae7">ARM_MPU_OrderedMemcpy</a> (<span class="keyword">volatile</span> uint32_t* dst, <span class="keyword">const</span> uint32_t* <a class="code hl_define" href="group__compiler__conntrol__gr.html#ga378ac21329d33f561f90265eef89f564">__RESTRICT</a> src, uint32_t len)</div>
 576 <div class="line">{</div>
 577 <div class="line">  uint32_t i;</div>
 578 <div class="line">  <span class="keywordflow">for</span> (i = 0U; i &lt; len; ++i)</div>
 579 <div class="line">  {</div>
 580 <div class="line">    dst[i] = src[i];   <span class="comment">// Since src is restrict, the compiler can assume that dst and src are not overlapping may load multiple values at a time</span></div>
 581 <div class="line">  }</div>
 582 <div class="line">}</div>
 583 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga378ac21329d33f561f90265eef89f564"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga378ac21329d33f561f90265eef89f564">__RESTRICT</a></div><div class="ttdeci">#define __RESTRICT</div><div class="ttdoc">restrict pointer qualifier to enable additional optimizations.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:199</div></div>
 584 <div class="ttc" id="agroup__mpu__functions_html_gac1a949403bf84eecaf407003fb553ae7"><div class="ttname"><a href="group__mpu__functions.html#gac1a949403bf84eecaf407003fb553ae7">ARM_MPU_OrderedMemcpy</a></div><div class="ttdeci">__STATIC_INLINE void ARM_MPU_OrderedMemcpy(volatile uint32_t *dst, const uint32_t *__RESTRICT src, uint32_t len)</div></div>
 585 </div><!-- fragment -->
 586 </div>
 587 </div>
 588 <a id="ga84b0bad4aa39632d3faea46aa1e102a8" name="ga84b0bad4aa39632d3faea46aa1e102a8"></a>
 589 <h2 class="memtitle"><span class="permalink"><a href="#ga84b0bad4aa39632d3faea46aa1e102a8">&#9670;&#160;</a></span>__STACK_LIMIT</h2>
 590
 591 <div class="memitem">
 592 <div class="memproto">
 593       <table class="memname">
 594         <tr>
 595           <td class="memname">#define __STACK_LIMIT</td>
 596         </tr>
 597       </table>
 598 </div><div class="memdoc">
 599
 600 <p>Compiler/linker symbol specifying the limit of the main stack (MSP). </p>
 601 <p>The address of the specified symbol is used to initialize the main stack pointer limit (MSPLIM on Armv8-M) during low level init. This is compiler/linker specific. CMSIS specifies common default for supported compilers.</p>
 602 <dl class="section note"><dt>Note</dt><dd>This define is only intended to be used by the <a class="el" href="startup_c_pg.html">Startup File startup_&lt;Device&gt;.c</a>.</dd></dl>
 603 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="keywordtype">void</span> Reset_Handler(<span class="keywordtype">void</span>)</div>
 604 <div class="line">{</div>
 605 <div class="line">  <a class="code hl_function" href="group__Core__Register__gr.html#ga6809a07c5cb7410e361f3fba57f72172">__set_MSPLIM</a>((uint32_t)(&amp;<a class="code hl_define" href="group__compiler__conntrol__gr.html#ga84b0bad4aa39632d3faea46aa1e102a8">__STACK_LIMIT</a>));</div>
 606 <div class="line">  <span class="comment">// :</span></div>
 607 <div class="line">  <span class="comment">// :</span></div>
 608 <div class="line">}</div>
 609 <div class="ttc" id="agroup__Core__Register__gr_html_ga6809a07c5cb7410e361f3fba57f72172"><div class="ttname"><a href="group__Core__Register__gr.html#ga6809a07c5cb7410e361f3fba57f72172">__set_MSPLIM</a></div><div class="ttdeci">__set_MSPLIM(uint32_t MainStackPtrLimit)</div><div class="ttdoc">Set Main Stack Pointer Limit Devices without Armv8-M Main Extensions (i.e. Cortex-M23) lack the non-s...</div></div>
 610 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga84b0bad4aa39632d3faea46aa1e102a8"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga84b0bad4aa39632d3faea46aa1e102a8">__STACK_LIMIT</a></div><div class="ttdeci">#define __STACK_LIMIT</div><div class="ttdoc">Compiler/linker symbol specifying the limit of the main stack (MSP).</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:496</div></div>
 611 </div><!-- fragment -->
 612 </div>
 613 </div>
 614 <a id="gab904513442afdf77d4f8c74f23cbb040" name="gab904513442afdf77d4f8c74f23cbb040"></a>
 615 <h2 class="memtitle"><span class="permalink"><a href="#gab904513442afdf77d4f8c74f23cbb040">&#9670;&#160;</a></span>__STATIC_FORCEINLINE</h2>
 616
 617 <div class="memitem">
 618 <div class="memproto">
 619       <table class="memname">
 620         <tr>
 621           <td class="memname">#define __STATIC_FORCEINLINE</td>
 622         </tr>
 623       </table>
 624 </div><div class="memdoc">
 625
 626 <p>Define a static function that should be always inlined by the compiler. </p>
 627 <p>Defines a static function that should be always inlined by the compiler.</p>
 628 <dl class="section note"><dt>Note</dt><dd>For compilers that do not allow to force function inlining, the macro maps to <a class="el" href="group__compiler__conntrol__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a>.</dd></dl>
 629 <p><b>Code Example:</b> </p><div class="fragment"><div class="line">\\ Get Interrupt Vector</div>
 630 <div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#gab904513442afdf77d4f8c74f23cbb040">__STATIC_FORCEINLINE</a> uint32_t <a class="code hl_function" href="group__NVIC__gr.html#gaebee9cad6724a5bac1857f0f1fb6d6af">NVIC_GetVector</a>(<a class="code hl_enumeration" href="group__NVIC__gr.html#ga7e1129cd8a196f4284d41db3e82ad5c8">IRQn_Type</a> IRQn)</div>
 631 <div class="line">{</div>
 632 <div class="line">    uint32_t *vectors = (uint32_t *) ((uintptr_t) SCB-&gt;VTOR);</div>
 633 <div class="line">    <span class="keywordflow">return</span> vectors[(int32_t)IRQn + NVIC_USER_IRQ_OFFSET];</div>
 634 <div class="line">}</div>
 635 <div class="ttc" id="agroup__NVIC__gr_html_ga7e1129cd8a196f4284d41db3e82ad5c8"><div class="ttname"><a href="group__NVIC__gr.html#ga7e1129cd8a196f4284d41db3e82ad5c8">IRQn_Type</a></div><div class="ttdeci">IRQn_Type</div><div class="ttdoc">Definition of IRQn numbers.</div><div class="ttdef"><b>Definition:</b> ref_nvic.txt:385</div></div>
 636 <div class="ttc" id="agroup__NVIC__gr_html_gaebee9cad6724a5bac1857f0f1fb6d6af"><div class="ttname"><a href="group__NVIC__gr.html#gaebee9cad6724a5bac1857f0f1fb6d6af">NVIC_GetVector</a></div><div class="ttdeci">uint32_t NVIC_GetVector(IRQn_Type IRQn)</div><div class="ttdoc">Read Interrupt Vector [not for Cortex-M0, SC000].</div></div>
 637 <div class="ttc" id="agroup__compiler__conntrol__gr_html_gab904513442afdf77d4f8c74f23cbb040"><div class="ttname"><a href="group__compiler__conntrol__gr.html#gab904513442afdf77d4f8c74f23cbb040">__STATIC_FORCEINLINE</a></div><div class="ttdeci">#define __STATIC_FORCEINLINE</div><div class="ttdoc">Define a static function that should be always inlined by the compiler.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:153</div></div>
 638 </div><!-- fragment -->
 639 </div>
 640 </div>
 641 <a id="gaba87361bfad2ae52cfe2f40c1a1dbf9c" name="gaba87361bfad2ae52cfe2f40c1a1dbf9c"></a>
 642 <h2 class="memtitle"><span class="permalink"><a href="#gaba87361bfad2ae52cfe2f40c1a1dbf9c">&#9670;&#160;</a></span>__STATIC_INLINE</h2>
 643
 644 <div class="memitem">
 645 <div class="memproto">
 646       <table class="memname">
 647         <tr>
 648           <td class="memname">#define __STATIC_INLINE</td>
 649         </tr>
 650       </table>
 651 </div><div class="memdoc">
 652
 653 <p>Define a static function that may be inlined by the compiler. </p>
 654 <p>Defines a static function that may be inlined by the compiler. If the compiler generates inline code for all calls to this functions, no additional function implementation is generated which may further optimize space.</p>
 655 <p><b>Code Example:</b> </p><div class="fragment"><div class="line">\\ Get Interrupt Vector</div>
 656 <div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#gaba87361bfad2ae52cfe2f40c1a1dbf9c">__STATIC_INLINE</a> uint32_t <a class="code hl_function" href="group__NVIC__gr.html#gaebee9cad6724a5bac1857f0f1fb6d6af">NVIC_GetVector</a>(<a class="code hl_enumeration" href="group__NVIC__gr.html#ga7e1129cd8a196f4284d41db3e82ad5c8">IRQn_Type</a> IRQn)</div>
 657 <div class="line">{</div>
 658 <div class="line">    uint32_t *vectors = (uint32_t *) ((uintptr_t) SCB-&gt;VTOR);</div>
 659 <div class="line">    <span class="keywordflow">return</span> vectors[(int32_t)IRQn + NVIC_USER_IRQ_OFFSET];</div>
 660 <div class="line">}</div>
 661 </div><!-- fragment -->
 662 </div>
 663 </div>
 664 <a id="gabe8693a7200e573101551d49a1772fb9" name="gabe8693a7200e573101551d49a1772fb9"></a>
 665 <h2 class="memtitle"><span class="permalink"><a href="#gabe8693a7200e573101551d49a1772fb9">&#9670;&#160;</a></span>__UNALIGNED_UINT16_READ</h2>
 666
 667 <div class="memitem">
 668 <div class="memproto">
 669       <table class="memname">
 670         <tr>
 671           <td class="memname">#define __UNALIGNED_UINT16_READ</td>
 672         </tr>
 673       </table>
 674 </div><div class="memdoc">
 675
 676 <p>Pointer for unaligned read of a uint16_t variable. </p>
 677 <p>Defines a pointer to a uint16_t from an address that does not need to be aligned. This can then be used in read operations. The compiler will generate the appropriate access (aligned or non-aligned) depending on the underlying Arm processor core and compiler settings.</p>
 678 <p><b>Code Example:</b> </p><div class="fragment"><div class="line">uint16_t val16;</div>
 679 <div class="line"> </div>
 680 <div class="line"><span class="keywordtype">void</span> test (uint8_t *ptr) {</div>
 681 <div class="line">   val16 = <a class="code hl_define" href="group__compiler__conntrol__gr.html#gabe8693a7200e573101551d49a1772fb9">__UNALIGNED_UINT16_READ</a>(ptr);</div>
 682 <div class="line">}</div>
 683 <div class="ttc" id="agroup__compiler__conntrol__gr_html_gabe8693a7200e573101551d49a1772fb9"><div class="ttname"><a href="group__compiler__conntrol__gr.html#gabe8693a7200e573101551d49a1772fb9">__UNALIGNED_UINT16_READ</a></div><div class="ttdeci">#define __UNALIGNED_UINT16_READ</div><div class="ttdoc">Pointer for unaligned read of a uint16_t variable.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:300</div></div>
 684 </div><!-- fragment -->
 685 </div>
 686 </div>
 687 <a id="gadb9cd73446f7e11e92383cd327a23407" name="gadb9cd73446f7e11e92383cd327a23407"></a>
 688 <h2 class="memtitle"><span class="permalink"><a href="#gadb9cd73446f7e11e92383cd327a23407">&#9670;&#160;</a></span>__UNALIGNED_UINT16_WRITE</h2>
 689
 690 <div class="memitem">
 691 <div class="memproto">
 692       <table class="memname">
 693         <tr>
 694           <td class="memname">#define __UNALIGNED_UINT16_WRITE</td>
 695         </tr>
 696       </table>
 697 </div><div class="memdoc">
 698
 699 <p>Pointer for unaligned write of a uint16_t variable. </p>
 700 <p>Defines a pointer to a uint16_t from an address that does not need to be aligned. This can then be used in write operations. The compiler will generate the appropriate access (aligned or non-aligned) depending on the underlying Arm processor core and compiler settings.</p>
 701 <p><b>Code Example:</b> </p><div class="fragment"><div class="line">uint16_t val16 = 0U;</div>
 702 <div class="line"> </div>
 703 <div class="line"><span class="keywordtype">void</span> test (uint8_t *ptr) {</div>
 704 <div class="line">   <a class="code hl_define" href="group__compiler__conntrol__gr.html#gadb9cd73446f7e11e92383cd327a23407">__UNALIGNED_UINT16_WRITE</a>(ptr, val16);</div>
 705 <div class="line">}</div>
 706 <div class="ttc" id="agroup__compiler__conntrol__gr_html_gadb9cd73446f7e11e92383cd327a23407"><div class="ttname"><a href="group__compiler__conntrol__gr.html#gadb9cd73446f7e11e92383cd327a23407">__UNALIGNED_UINT16_WRITE</a></div><div class="ttdeci">#define __UNALIGNED_UINT16_WRITE</div><div class="ttdoc">Pointer for unaligned write of a uint16_t variable.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:321</div></div>
 707 </div><!-- fragment -->
 708 </div>
 709 </div>
 710 <a id="ga254322c344d954c9f829719a50a88e87" name="ga254322c344d954c9f829719a50a88e87"></a>
 711 <h2 class="memtitle"><span class="permalink"><a href="#ga254322c344d954c9f829719a50a88e87">&#9670;&#160;</a></span>__UNALIGNED_UINT32_READ</h2>
 712
 713 <div class="memitem">
 714 <div class="memproto">
 715       <table class="memname">
 716         <tr>
 717           <td class="memname">#define __UNALIGNED_UINT32_READ</td>
 718         </tr>
 719       </table>
 720 </div><div class="memdoc">
 721
 722 <p>Pointer for unaligned read of a uint32_t variable. </p>
 723 <p>Defines a pointer to a uint32_t from an address that does not need to be aligned. This can then be used in read operations. The compiler will generate the appropriate access (aligned or non-aligned) depending on the underlying Arm processor core and compiler settings.</p>
 724 <p><b>Code Example:</b> </p><div class="fragment"><div class="line">uint32_t val32;</div>
 725 <div class="line"> </div>
 726 <div class="line"><span class="keywordtype">void</span> test (uint8_t *ptr) {</div>
 727 <div class="line">   val32 = <a class="code hl_define" href="group__compiler__conntrol__gr.html#ga254322c344d954c9f829719a50a88e87">__UNALIGNED_UINT32_READ</a>(ptr);</div>
 728 <div class="line">}</div>
 729 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga254322c344d954c9f829719a50a88e87"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga254322c344d954c9f829719a50a88e87">__UNALIGNED_UINT32_READ</a></div><div class="ttdeci">#define __UNALIGNED_UINT32_READ</div><div class="ttdoc">Pointer for unaligned read of a uint32_t variable.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:342</div></div>
 730 </div><!-- fragment -->
 731 </div>
 732 </div>
 733 <a id="gabb2180285c417aa9120a360c51f64b4b" name="gabb2180285c417aa9120a360c51f64b4b"></a>
 734 <h2 class="memtitle"><span class="permalink"><a href="#gabb2180285c417aa9120a360c51f64b4b">&#9670;&#160;</a></span>__UNALIGNED_UINT32_WRITE</h2>
 735
 736 <div class="memitem">
 737 <div class="memproto">
 738       <table class="memname">
 739         <tr>
 740           <td class="memname">#define __UNALIGNED_UINT32_WRITE</td>
 741         </tr>
 742       </table>
 743 </div><div class="memdoc">
 744
 745 <p>Pointer for unaligned write of a uint32_t variable. </p>
 746 <p>Defines a pointer to a uint32_t from an address that does not need to be aligned. This can then be used in write operations. The compiler will generate the appropriate access (aligned or non-aligned) depending on the underlying Arm processor core and compiler settings.</p>
 747 <p><b>Code Example:</b> </p><div class="fragment"><div class="line">uint32_t val32 = 0U;</div>
 748 <div class="line"> </div>
 749 <div class="line"><span class="keywordtype">void</span> test (uint8_t *ptr) {</div>
 750 <div class="line">   <a class="code hl_define" href="group__compiler__conntrol__gr.html#gabb2180285c417aa9120a360c51f64b4b">__UNALIGNED_UINT32_WRITE</a>(ptr, val32);</div>
 751 <div class="line">}</div>
 752 <div class="ttc" id="agroup__compiler__conntrol__gr_html_gabb2180285c417aa9120a360c51f64b4b"><div class="ttname"><a href="group__compiler__conntrol__gr.html#gabb2180285c417aa9120a360c51f64b4b">__UNALIGNED_UINT32_WRITE</a></div><div class="ttdeci">#define __UNALIGNED_UINT32_WRITE</div><div class="ttdoc">Pointer for unaligned write of a uint32_t variable.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:363</div></div>
 753 </div><!-- fragment -->
 754 </div>
 755 </div>
 756 <a id="ga3e40e4c553fc11588f7a4c2a19e789e0" name="ga3e40e4c553fc11588f7a4c2a19e789e0"></a>
 757 <h2 class="memtitle"><span class="permalink"><a href="#ga3e40e4c553fc11588f7a4c2a19e789e0">&#9670;&#160;</a></span>__USED</h2>
 758
 759 <div class="memitem">
 760 <div class="memproto">
 761       <table class="memname">
 762         <tr>
 763           <td class="memname">#define __USED</td>
 764         </tr>
 765       </table>
 766 </div><div class="memdoc">
 767
 768 <p>Inform that a variable shall be retained in executable image. </p>
 769 <p>Definitions tagged with <b>__USED</b> in the source code should be not removed by the linker when detected as unused.</p>
 770 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><span class="comment">/* Export following variables for debugging */</span></div>
 771 <div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#ga3e40e4c553fc11588f7a4c2a19e789e0">__USED</a> uint32_t <span class="keyword">const</span> CMSIS_RTOS_API_Version = osCMSIS;</div>
 772 <div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#ga3e40e4c553fc11588f7a4c2a19e789e0">__USED</a> uint32_t <span class="keyword">const</span> CMSIS_RTOS_RTX_Version = osCMSIS_RTX;</div>
 773 <div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#ga3e40e4c553fc11588f7a4c2a19e789e0">__USED</a> uint32_t <span class="keyword">const</span> os_clockrate = OS_TICK;</div>
 774 <div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#ga3e40e4c553fc11588f7a4c2a19e789e0">__USED</a> uint32_t <span class="keyword">const</span> os_timernum  = 0;</div>
 775 <div class="ttc" id="agroup__compiler__conntrol__gr_html_ga3e40e4c553fc11588f7a4c2a19e789e0"><div class="ttname"><a href="group__compiler__conntrol__gr.html#ga3e40e4c553fc11588f7a4c2a19e789e0">__USED</a></div><div class="ttdeci">#define __USED</div><div class="ttdoc">Inform that a variable shall be retained in executable image.</div><div class="ttdef"><b>Definition:</b> ref_compiler_ctrl.txt:218</div></div>
 776 </div><!-- fragment -->
 777 </div>
 778 </div>
 779 <a id="gab94ebeb20055f1848d7b707d3c7cfc5d" name="gab94ebeb20055f1848d7b707d3c7cfc5d"></a>
 780 <h2 class="memtitle"><span class="permalink"><a href="#gab94ebeb20055f1848d7b707d3c7cfc5d">&#9670;&#160;</a></span>__VECTOR_TABLE</h2>
 781
 782 <div class="memitem">
 783 <div class="memproto">
 784       <table class="memname">
 785         <tr>
 786           <td class="memname">#define __VECTOR_TABLE</td>
 787         </tr>
 788       </table>
 789 </div><div class="memdoc">
 790
 791 <p>Symbol name used for the (static) interrupt vector table. </p>
 792 <p>The given name is used for defining the static (compiler time) interrupt vector table. The name must comply with any compiler/linker conventions, e.g. if used for vector table relocation or debugger awareness. CMSIS specifies common default for supported compilers.</p>
 793 <dl class="section note"><dt>Note</dt><dd>This define is only intended to be used by the <a class="el" href="startup_c_pg.html">Startup File startup_&lt;Device&gt;.c</a>. </dd></dl>
 794
 795 </div>
 796 </div>
 797 <a id="ga4f65c96effa79fbd610fea43ee7d745b" name="ga4f65c96effa79fbd610fea43ee7d745b"></a>
 798 <h2 class="memtitle"><span class="permalink"><a href="#ga4f65c96effa79fbd610fea43ee7d745b">&#9670;&#160;</a></span>__VECTOR_TABLE_ATTRIBUTE</h2>
 799
 800 <div class="memitem">
 801 <div class="memproto">
 802       <table class="memname">
 803         <tr>
 804           <td class="memname">#define __VECTOR_TABLE_ATTRIBUTE</td>
 805         </tr>
 806       </table>
 807 </div><div class="memdoc">
 808
 809 <p>Additional decl specs to be used when defining the (static) interrupt vector table. </p>
 810 <p>The given decl specs are used for defining the static (compiler time) interrupt vector table, e.g. to mark the table as used and force it into a specific linker section. CMSIS specifies common default for supported compilers.</p>
 811 <dl class="section note"><dt>Note</dt><dd>This define is only intended to be used by the <a class="el" href="startup_c_pg.html">Startup File startup_&lt;Device&gt;.c</a>. </dd></dl>
 812
 813 </div>
 814 </div>
 815 <a id="gac607bf387b29162be6a9b77fc7999539" name="gac607bf387b29162be6a9b77fc7999539"></a>
 816 <h2 class="memtitle"><span class="permalink"><a href="#gac607bf387b29162be6a9b77fc7999539">&#9670;&#160;</a></span>__WEAK</h2>
 817
 818 <div class="memitem">
 819 <div class="memproto">
 820       <table class="memname">
 821         <tr>
 822           <td class="memname">#define __WEAK</td>
 823         </tr>
 824       </table>
 825 </div><div class="memdoc">
 826
 827 <p>Export a function or variable weakly to allow overwrites. </p>
 828 <p>Functions defined with <b>__WEAK</b> export their symbols weakly. A weakly defined function behaves like a normally defined function unless a non-weakly defined function of the same name is linked into the same image. If both a non-weakly defined function and a weakly defined function exist in the same image then all calls to the function resolve to call the non-weak function.</p>
 829 <p>Functions declared with <b>__WEAK</b> and then defined without <b>__WEAK</b> behave as non-weak functions.</p>
 830 <p><b>Code Example:</b> </p><div class="fragment"><div class="line"><a class="code hl_define" href="group__compiler__conntrol__gr.html#gac607bf387b29162be6a9b77fc7999539">__WEAK</a> <span class="keywordtype">void</span> <a class="code hl_function" href="group__system__init__gr.html#ga93f514700ccf00d08dbdcff7f1224eb2">SystemInit</a>(<span class="keywordtype">void</span>)</div>
 831 <div class="line">{</div>
 832 <div class="line">  SystemCoreSetup();</div>
 833 <div class="line">  SystemCoreClockSetup();</div>
 834 <div class="line">}</div>
 835 </div><!-- fragment -->
 836 </div>
 837 </div>
 838 </div><!-- contents -->
 839 </div><!-- doc-content -->
 840 <!-- start footer part -->
 841 <div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
 842   <ul>
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 845         <!--
 846         writeFooter.call(this);
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