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<a href="#func-members">Functions</a> </div>
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<div class="title">Interrupts and flags management 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___r_n_g.html">RNG</a> » <a class="el" href="group___r_n_g___private___functions.html">RNG_Private_Functions</a></div></div> </div>
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<div class="contents">
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<p>Interrupts and flags management functions.
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<a href="#details">More...</a></p>
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<div class="dynheader">
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Collaboration diagram for Interrupts and flags management functions:</div>
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<div class="dyncontent">
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<center><table><tr><td><img src="group___r_n_g___group3.png" border="0" alt="" usemap="#group______r__n__g______group3"/>
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<map name="group______r__n__g______group3" id="group______r__n__g______group3">
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<area shape="rect" id="node1" href="group___r_n_g___private___functions.html" title="RNG_Private_Functions" alt="" coords="5,13,165,39"/></map>
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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:ga41d9be4c303ba0875a82c62dc7085f08"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___r_n_g___group3.html#ga41d9be4c303ba0875a82c62dc7085f08">RNG_ITConfig</a> (FunctionalState NewState)</td></tr>
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<tr class="memdesc:ga41d9be4c303ba0875a82c62dc7085f08"><td class="mdescLeft"> </td><td class="mdescRight">Enables or disables the RNG interrupt. <a href="#ga41d9be4c303ba0875a82c62dc7085f08">More...</a><br /></td></tr>
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<tr class="separator:ga41d9be4c303ba0875a82c62dc7085f08"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gab70d6cc7d943dfb8eac15ccecf6cd7b3"><td class="memItemLeft" align="right" valign="top">FlagStatus </td><td class="memItemRight" valign="bottom"><a class="el" href="group___r_n_g___group3.html#gab70d6cc7d943dfb8eac15ccecf6cd7b3">RNG_GetFlagStatus</a> (uint8_t RNG_FLAG)</td></tr>
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<tr class="memdesc:gab70d6cc7d943dfb8eac15ccecf6cd7b3"><td class="mdescLeft"> </td><td class="mdescRight">Checks whether the specified RNG flag is set or not. <a href="#gab70d6cc7d943dfb8eac15ccecf6cd7b3">More...</a><br /></td></tr>
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<tr class="separator:gab70d6cc7d943dfb8eac15ccecf6cd7b3"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gac3c67fe6bacdc4529f1707025224f954"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___r_n_g___group3.html#gac3c67fe6bacdc4529f1707025224f954">RNG_ClearFlag</a> (uint8_t RNG_FLAG)</td></tr>
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<tr class="memdesc:gac3c67fe6bacdc4529f1707025224f954"><td class="mdescLeft"> </td><td class="mdescRight">Clears the RNG flags. <a href="#gac3c67fe6bacdc4529f1707025224f954">More...</a><br /></td></tr>
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<tr class="separator:gac3c67fe6bacdc4529f1707025224f954"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gab58eaab67698770d9ea9775fb280271f"><td class="memItemLeft" align="right" valign="top">ITStatus </td><td class="memItemRight" valign="bottom"><a class="el" href="group___r_n_g___group3.html#gab58eaab67698770d9ea9775fb280271f">RNG_GetITStatus</a> (uint8_t RNG_IT)</td></tr>
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<tr class="memdesc:gab58eaab67698770d9ea9775fb280271f"><td class="mdescLeft"> </td><td class="mdescRight">Checks whether the specified RNG interrupt has occurred or not. <a href="#gab58eaab67698770d9ea9775fb280271f">More...</a><br /></td></tr>
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<tr class="separator:gab58eaab67698770d9ea9775fb280271f"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga2b1c78c003cd5c886e09fdbc2c89cacb"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___r_n_g___group3.html#ga2b1c78c003cd5c886e09fdbc2c89cacb">RNG_ClearITPendingBit</a> (uint8_t RNG_IT)</td></tr>
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<tr class="memdesc:ga2b1c78c003cd5c886e09fdbc2c89cacb"><td class="mdescLeft"> </td><td class="mdescRight">Clears the RNG interrupt pending bit(s). <a href="#ga2b1c78c003cd5c886e09fdbc2c89cacb">More...</a><br /></td></tr>
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<tr class="separator:ga2b1c78c003cd5c886e09fdbc2c89cacb"><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>Interrupts and flags management functions. </p>
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<pre class="fragment"> ===============================================================================
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##### Interrupts and flags management functions #####
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===============================================================================
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[..] This section provides functions allowing to configure the RNG Interrupts and
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to get the status and clear flags and Interrupts pending bits.
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[..] The RNG provides 3 Interrupts sources and 3 Flags:
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*** Flags : ***
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===============
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[..]
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(#) RNG_FLAG_DRDY : In the case of the RNG_DR register contains valid
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random data. it is cleared by reading the valid data(using
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RNG_GetRandomNumber() function).
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(#) RNG_FLAG_CECS : In the case of a seed error detection.
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(#) RNG_FLAG_SECS : In the case of a clock error detection.
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*** Interrupts ***
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==================
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[..] If enabled, an RNG interrupt is pending :
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(#) In the case of the RNG_DR register contains valid random data.
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This interrupt source is cleared once the RNG_DR register has been read
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(using RNG_GetRandomNumber() function) until a new valid value is
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computed; or
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(#) In the case of a seed error : One of the following faulty sequences has
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been detected:
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(++) More than 64 consecutive bits at the same value (0 or 1)
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(++) More than 32 consecutive alternance of 0 and 1 (0101010101...01)
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This interrupt source is cleared using RNG_ClearITPendingBit(RNG_IT_SEI)
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function; or
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(#) In the case of a clock error : the PLL48CLK (RNG peripheral clock source)
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was not correctly detected (fPLL48CLK< fHCLK/16). This interrupt source is
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cleared using RNG_ClearITPendingBit(RNG_IT_CEI) function.
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-@- note In this case, User have to check that the clock controller is
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correctly configured to provide the RNG clock.
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*** Managing the RNG controller events : ***
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============================================
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[..] The user should identify which mode will be used in his application to manage
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the RNG controller events: Polling mode or Interrupt mode.
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(#) In the Polling Mode it is advised to use the following functions:
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(++) RNG_GetFlagStatus() : to check if flags events occur.
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(++) RNG_ClearFlag() : to clear the flags events.
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-@@- RNG_FLAG_DRDY can not be cleared by RNG_ClearFlag(). it is cleared only
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by reading the Random number data.
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(#) In the Interrupt Mode it is advised to use the following functions:
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(++) RNG_ITConfig() : to enable or disable the interrupt source.
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(++) RNG_GetITStatus() : to check if Interrupt occurs.
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(++) RNG_ClearITPendingBit() : to clear the Interrupt pending Bit
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(corresponding Flag). </pre> <h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="gac3c67fe6bacdc4529f1707025224f954"></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">void RNG_ClearFlag </td>
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<td>(</td>
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<td class="paramtype">uint8_t </td>
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<td class="paramname"><em>RNG_FLAG</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>Clears the RNG flags. </p>
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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">RNG_FLAG</td><td>specifies the flag to clear. This parameter can be any combination of the following values: <ul>
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<li>RNG_FLAG_CECS: Clock Error Current flag. </li>
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<li>RNG_FLAG_SECS: Seed Error Current flag. </li>
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</ul>
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</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>RNG_FLAG_DRDY can not be cleared by <a class="el" href="group___r_n_g___group3.html#gac3c67fe6bacdc4529f1707025224f954" title="Clears the RNG flags. ">RNG_ClearFlag()</a> function. This flag is cleared only by reading the Random number data (using <a class="el" href="group___r_n_g___group2.html#ga2cead4780224fd74a3fc15543c98ed36" title="Returns a 32-bit random number. ">RNG_GetRandomNumber()</a> function). </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="ga2b1c78c003cd5c886e09fdbc2c89cacb"></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">void RNG_ClearITPendingBit </td>
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<td>(</td>
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<td class="paramtype">uint8_t </td>
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<td class="paramname"><em>RNG_IT</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>Clears the RNG interrupt pending bit(s). </p>
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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">RNG_IT</td><td>specifies the RNG interrupt pending bit(s) to clear. This parameter can be any combination of the following values: <ul>
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<li>RNG_IT_CEI: Clock Error Interrupt. </li>
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<li>RNG_IT_SEI: Seed Error Interrupt. </li>
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</ul>
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</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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</div>
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</div>
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<a class="anchor" id="gab70d6cc7d943dfb8eac15ccecf6cd7b3"></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">FlagStatus RNG_GetFlagStatus </td>
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<td>(</td>
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<td class="paramtype">uint8_t </td>
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<td class="paramname"><em>RNG_FLAG</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>Checks whether the specified RNG flag is set or not. </p>
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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">RNG_FLAG</td><td>specifies the RNG flag to check. This parameter can be one of the following values: <ul>
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<li>RNG_FLAG_DRDY: Data Ready flag. </li>
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<li>RNG_FLAG_CECS: Clock Error Current flag. </li>
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<li>RNG_FLAG_SECS: Seed Error Current flag. </li>
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</ul>
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</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">The</td><td>new state of RNG_FLAG (SET or RESET). </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="gab58eaab67698770d9ea9775fb280271f"></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">ITStatus RNG_GetITStatus </td>
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<td>(</td>
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<td class="paramtype">uint8_t </td>
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<td class="paramname"><em>RNG_IT</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>Checks whether the specified RNG interrupt has occurred or not. </p>
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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">RNG_IT</td><td>specifies the RNG interrupt source to check. This parameter can be one of the following values: <ul>
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<li>RNG_IT_CEI: Clock Error Interrupt. </li>
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<li>RNG_IT_SEI: Seed Error Interrupt. </li>
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</ul>
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</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">The</td><td>new state of RNG_IT (SET or RESET). </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="ga41d9be4c303ba0875a82c62dc7085f08"></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">void RNG_ITConfig </td>
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<td>(</td>
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<td class="paramtype">FunctionalState </td>
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<td class="paramname"><em>NewState</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>Enables or disables the RNG interrupt. </p>
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<dl class="section note"><dt>Note</dt><dd>The RNG provides 3 interrupt sources,<ul>
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<li>Computed data is ready event (DRDY), and</li>
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<li>Seed error Interrupt (SEI) and</li>
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<li>Clock error Interrupt (CEI), all these interrupts sources are enabled by setting the IE bit in CR register. However, each interrupt have its specific status bit (see <a class="el" href="group___r_n_g___group3.html#gab58eaab67698770d9ea9775fb280271f" title="Checks whether the specified RNG interrupt has occurred or not. ">RNG_GetITStatus()</a> function) and clear bit except the DRDY event (see <a class="el" href="group___r_n_g___group3.html#ga2b1c78c003cd5c886e09fdbc2c89cacb" title="Clears the RNG interrupt pending bit(s). ">RNG_ClearITPendingBit()</a> function). </li>
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</ul>
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</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">NewState</td><td>new state of the RNG interrupt. This parameter can be: ENABLE or DISABLE. </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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</div>
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</div>
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</div><!-- contents -->
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</a> 1.8.9.1
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</html>
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