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<a href="#func-members">Functions</a> </div>
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<div class="title">Get 32 bit Random number function<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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<p>Get 32 bit Random number function.
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<a href="#details">More...</a></p>
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Collaboration diagram for Get 32 bit Random number function:</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:ga2cead4780224fd74a3fc15543c98ed36"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___r_n_g___group2.html#ga2cead4780224fd74a3fc15543c98ed36">RNG_GetRandomNumber</a> (void)</td></tr>
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<tr class="memdesc:ga2cead4780224fd74a3fc15543c98ed36"><td class="mdescLeft"> </td><td class="mdescRight">Returns a 32-bit random number. <a href="#ga2cead4780224fd74a3fc15543c98ed36">More...</a><br /></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>Get 32 bit Random number function. </p>
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<pre class="fragment"> ===============================================================================
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##### Get 32 bit Random number function #####
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===============================================================================
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[..] This section provides a function allowing to get the 32 bit Random number
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(@) Before to call this function you have to wait till DRDY flag is set,
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using RNG_GetFlagStatus(RNG_FLAG_DRDY) function. </pre> <h2 class="groupheader">Function Documentation</h2>
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<td class="memname">uint32_t RNG_GetRandomNumber </td>
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<td>(</td>
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<td class="paramtype">void </td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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</tr>
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</div><div class="memdoc">
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<p>Returns a 32-bit random number. </p>
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<dl class="section note"><dt>Note</dt><dd>Before to call this function you have to wait till DRDY (data ready) flag is set, using RNG_GetFlagStatus(RNG_FLAG_DRDY) function. </dd>
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<dd>
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Each time the the Random number data is read (using <a class="el" href="group___r_n_g___group2.html#ga2cead4780224fd74a3fc15543c98ed36" title="Returns a 32-bit random number. ">RNG_GetRandomNumber()</a> function), the RNG_FLAG_DRDY flag is automatically cleared. </dd>
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<dd>
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In the case of a seed error, the generation of random numbers is interrupted for as long as the SECS bit is '1'. If a number is available in the RNG_DR register, it must not be used because it may not have enough entropy. In this case, it is recommended to clear the SEIS bit(using RNG_ClearFlag(RNG_FLAG_SECS) function), then disable and enable the RNG peripheral (using <a class="el" href="group___r_n_g___group1.html#ga6c1a8372da6e8a06819903c63faecd7b" title="Enables or disables the RNG peripheral. ">RNG_Cmd()</a> function) to reinitialize and restart the RNG. </dd>
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<dd>
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In the case of a clock error, the RNG is no more able to generate random numbers because the PLL48CLK clock is not correct. User have to check that the clock controller is correctly configured to provide the RNG clock and clear the CEIS bit (using RNG_ClearFlag(RNG_FLAG_CECS) function) . The clock error has no impact on the previously generated random numbers, and the RNG_DR register contents can be 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">None</td><td></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">32-bit</td><td>random number. </td></tr>
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</table>
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</dd>
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