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<a href="#func-members">Functions</a> </div>
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<div class="title">Context swapping functions<div class="ingroups"><a class="el" href="group___s_t_m32_f4xx___std_periph___driver.html">STM32F4xx_StdPeriph_Driver</a> » <a class="el" href="group___c_r_y_p.html">CRYP</a> » <a class="el" href="group___c_r_y_p___private___functions.html">CRYP_Private_Functions</a></div></div> </div>
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<p>Context swapping functions.
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<a href="#details">More...</a></p>
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Collaboration diagram for Context swapping functions:</div>
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<center><table><tr><td><img src="group___c_r_y_p___group3.png" border="0" alt="" usemap="#group______c__r__y__p______group3"/>
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<map name="group______c__r__y__p______group3" id="group______c__r__y__p______group3">
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<area shape="rect" id="node2" href="group___c_r_y_p___private___functions.html" title="CRYP_Private_Functions" alt="" coords="5,5,173,32"/></map>
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</td></tr></table></center>
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</div>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:ga41a14be7fa43d500e7c94cce40910ea8"><td class="memItemLeft" align="right" valign="top">ErrorStatus </td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_r_y_p___group3.html#ga41a14be7fa43d500e7c94cce40910ea8">CRYP_SaveContext</a> (<a class="el" href="struct_c_r_y_p___context.html">CRYP_Context</a> *CRYP_ContextSave, <a class="el" href="struct_c_r_y_p___key_init_type_def.html">CRYP_KeyInitTypeDef</a> *CRYP_KeyInitStruct)</td></tr>
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<tr class="memdesc:ga41a14be7fa43d500e7c94cce40910ea8"><td class="mdescLeft"> </td><td class="mdescRight">Saves the CRYP peripheral Context. <a href="#ga41a14be7fa43d500e7c94cce40910ea8">More...</a><br /></td></tr>
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<tr class="separator:ga41a14be7fa43d500e7c94cce40910ea8"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gaf2986782fa66ea95b2a389595e17e0e5"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___c_r_y_p___group3.html#gaf2986782fa66ea95b2a389595e17e0e5">CRYP_RestoreContext</a> (<a class="el" href="struct_c_r_y_p___context.html">CRYP_Context</a> *CRYP_ContextRestore)</td></tr>
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<tr class="memdesc:gaf2986782fa66ea95b2a389595e17e0e5"><td class="mdescLeft"> </td><td class="mdescRight">Restores the CRYP peripheral Context. <a href="#gaf2986782fa66ea95b2a389595e17e0e5">More...</a><br /></td></tr>
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<tr class="separator:gaf2986782fa66ea95b2a389595e17e0e5"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<p>Context swapping functions. </p>
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<pre class="fragment"> ===============================================================================
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##### Context swapping functions #####
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===============================================================================
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[..] This section provides functions allowing to save and store CRYP Context
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[..] It is possible to interrupt an encryption/ decryption/ key generation process
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to perform another processing with a higher priority, and to complete the
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interrupted process later on, when the higher-priority task is complete. To do
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so, the context of the interrupted task must be saved from the CRYP registers
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to memory, and then be restored from memory to the CRYP registers.
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(#) To save the current context, use CRYP_SaveContext() function
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(#) To restore the saved context, use CRYP_RestoreContext() function </pre> <h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="gaf2986782fa66ea95b2a389595e17e0e5"></a>
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<div class="memitem">
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<td class="memname">void CRYP_RestoreContext </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_c_r_y_p___context.html">CRYP_Context</a> * </td>
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<td class="paramname"><em>CRYP_ContextRestore</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Restores the CRYP peripheral Context. </p>
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<dl class="section note"><dt>Note</dt><dd>Since teh DMA transfer is stopped in <a class="el" href="group___c_r_y_p___group3.html#ga41a14be7fa43d500e7c94cce40910ea8" title="Saves the CRYP peripheral Context. ">CRYP_SaveContext()</a> function, after restoring the context, you have to enable the DMA again (if the DMA was previously used). </dd></dl>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">CRYP_ContextRestore</td><td>pointer to a <a class="el" href="struct_c_r_y_p___context.html" title="CRYP context swapping structure definition. ">CRYP_Context</a> structure that contains the repository for saved context. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section note"><dt>Note</dt><dd>The data that were saved during context saving must be rewrited into the IN FIFO. </dd></dl>
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<dl class="retval"><dt>Return values</dt><dd>
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<table class="retval">
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<tr><td class="paramname">None</td><td></td></tr>
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</table>
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</dd>
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</dl>
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</div>
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</div>
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<a class="anchor" id="ga41a14be7fa43d500e7c94cce40910ea8"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">ErrorStatus CRYP_SaveContext </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_c_r_y_p___context.html">CRYP_Context</a> * </td>
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<td class="paramname"><em>CRYP_ContextSave</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="struct_c_r_y_p___key_init_type_def.html">CRYP_KeyInitTypeDef</a> * </td>
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<td class="paramname"><em>CRYP_KeyInitStruct</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Saves the CRYP peripheral Context. </p>
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<dl class="section note"><dt>Note</dt><dd>This function stops DMA transfer before to save the context. After restoring the context, you have to enable the DMA again (if the DMA was previously used). </dd></dl>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">CRYP_ContextSave</td><td>pointer to a <a class="el" href="struct_c_r_y_p___context.html" title="CRYP context swapping structure definition. ">CRYP_Context</a> structure that contains the repository for current context. </td></tr>
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<tr><td class="paramname">CRYP_KeyInitStruct</td><td>pointer to a <a class="el" href="struct_c_r_y_p___key_init_type_def.html" title="CRYP Key(s) structure definition. ">CRYP_KeyInitTypeDef</a> structure that contains the configuration information for the CRYP Keys. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="retval"><dt>Return values</dt><dd>
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<table class="retval">
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<tr><td class="paramname">None</td><td></td></tr>
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</table>
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</dd>
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</dl>
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