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<a href="#func-members">Functions</a> </div>
<div class="headertitle">
<div class="title">GPIO Read and Write<div class="ingroups"><a class="el" href="group___s_t_m32_f4xx___std_periph___driver.html">STM32F4xx_StdPeriph_Driver</a> &raquo; <a class="el" href="group___g_p_i_o.html">GPIO</a> &raquo; <a class="el" href="group___g_p_i_o___private___functions.html">GPIO_Private_Functions</a></div></div> </div>
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<p>GPIO Read and Write.
<a href="#details">More...</a></p>
<div class="dynheader">
Collaboration diagram for GPIO Read and Write:</div>
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<center><table><tr><td><img src="group___g_p_i_o___group2.png" border="0" alt="" usemap="#group______g__p__i__o______group2"/>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga98772ef6b639b3fa06c8ae5ba28d3aaa"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_p_i_o___group2.html#ga98772ef6b639b3fa06c8ae5ba28d3aaa">GPIO_ReadInputDataBit</a> (<a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *GPIOx, uint16_t GPIO_Pin)</td></tr>
<tr class="memdesc:ga98772ef6b639b3fa06c8ae5ba28d3aaa"><td class="mdescLeft">&#160;</td><td class="mdescRight">Reads the specified input port pin. <a href="#ga98772ef6b639b3fa06c8ae5ba28d3aaa">More...</a><br /></td></tr>
<tr class="separator:ga98772ef6b639b3fa06c8ae5ba28d3aaa"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga139a33adc8409288e9f193bbebb5a0f7"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_p_i_o___group2.html#ga139a33adc8409288e9f193bbebb5a0f7">GPIO_ReadInputData</a> (<a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *GPIOx)</td></tr>
<tr class="memdesc:ga139a33adc8409288e9f193bbebb5a0f7"><td class="mdescLeft">&#160;</td><td class="mdescRight">Reads the specified GPIO input data port. <a href="#ga139a33adc8409288e9f193bbebb5a0f7">More...</a><br /></td></tr>
<tr class="separator:ga139a33adc8409288e9f193bbebb5a0f7"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga138270f8695b105b7c6ed405792919c1"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_p_i_o___group2.html#ga138270f8695b105b7c6ed405792919c1">GPIO_ReadOutputDataBit</a> (<a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *GPIOx, uint16_t GPIO_Pin)</td></tr>
<tr class="memdesc:ga138270f8695b105b7c6ed405792919c1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Reads the specified output data port bit. <a href="#ga138270f8695b105b7c6ed405792919c1">More...</a><br /></td></tr>
<tr class="separator:ga138270f8695b105b7c6ed405792919c1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaf8938a34280b7dc3e39872a7c17bb323"><td class="memItemLeft" align="right" valign="top">uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_p_i_o___group2.html#gaf8938a34280b7dc3e39872a7c17bb323">GPIO_ReadOutputData</a> (<a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *GPIOx)</td></tr>
<tr class="memdesc:gaf8938a34280b7dc3e39872a7c17bb323"><td class="mdescLeft">&#160;</td><td class="mdescRight">Reads the specified GPIO output data port. <a href="#gaf8938a34280b7dc3e39872a7c17bb323">More...</a><br /></td></tr>
<tr class="separator:gaf8938a34280b7dc3e39872a7c17bb323"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga9e1352eed7c6620e18af2d86f6b6ff8e"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_p_i_o___group2.html#ga9e1352eed7c6620e18af2d86f6b6ff8e">GPIO_SetBits</a> (<a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *GPIOx, uint16_t GPIO_Pin)</td></tr>
<tr class="memdesc:ga9e1352eed7c6620e18af2d86f6b6ff8e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets the selected data port bits. <a href="#ga9e1352eed7c6620e18af2d86f6b6ff8e">More...</a><br /></td></tr>
<tr class="separator:ga9e1352eed7c6620e18af2d86f6b6ff8e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga6fcd35b207a66608dd2c9d7de9247dc8"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_p_i_o___group2.html#ga6fcd35b207a66608dd2c9d7de9247dc8">GPIO_ResetBits</a> (<a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *GPIOx, uint16_t GPIO_Pin)</td></tr>
<tr class="memdesc:ga6fcd35b207a66608dd2c9d7de9247dc8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Clears the selected data port bits. <a href="#ga6fcd35b207a66608dd2c9d7de9247dc8">More...</a><br /></td></tr>
<tr class="separator:ga6fcd35b207a66608dd2c9d7de9247dc8"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga8f7b237fd744d9f7456fbe0da47a9b80"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_p_i_o___group2.html#ga8f7b237fd744d9f7456fbe0da47a9b80">GPIO_WriteBit</a> (<a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *GPIOx, uint16_t GPIO_Pin, <a class="el" href="group___g_p_i_o.html#ga176130b21c0e719121470a6042d4cf19">BitAction</a> BitVal)</td></tr>
<tr class="memdesc:ga8f7b237fd744d9f7456fbe0da47a9b80"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets or clears the selected data port bit. <a href="#ga8f7b237fd744d9f7456fbe0da47a9b80">More...</a><br /></td></tr>
<tr class="separator:ga8f7b237fd744d9f7456fbe0da47a9b80"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaa925f19c8547a00c7a0c269a84873bf9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_p_i_o___group2.html#gaa925f19c8547a00c7a0c269a84873bf9">GPIO_Write</a> (<a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *GPIOx, uint16_t PortVal)</td></tr>
<tr class="memdesc:gaa925f19c8547a00c7a0c269a84873bf9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Writes data to the specified GPIO data port. <a href="#gaa925f19c8547a00c7a0c269a84873bf9">More...</a><br /></td></tr>
<tr class="separator:gaa925f19c8547a00c7a0c269a84873bf9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gac1b837c66258872740d5f89f23549ab1"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_p_i_o___group2.html#gac1b837c66258872740d5f89f23549ab1">GPIO_ToggleBits</a> (<a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *GPIOx, uint16_t GPIO_Pin)</td></tr>
<tr class="memdesc:gac1b837c66258872740d5f89f23549ab1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Toggles the specified GPIO pins.. <a href="#gac1b837c66258872740d5f89f23549ab1">More...</a><br /></td></tr>
<tr class="separator:gac1b837c66258872740d5f89f23549ab1"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>GPIO Read and Write. </p>
<pre class="fragment"> ===============================================================================
##### GPIO Read and Write #####
=============================================================================== </pre> <h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="ga139a33adc8409288e9f193bbebb5a0f7"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">uint16_t GPIO_ReadInputData </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *&#160;</td>
<td class="paramname"><em>GPIOx</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Reads the specified GPIO input data port. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">GPIOx</td><td>where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices. x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">GPIO</td><td>input data port value. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga98772ef6b639b3fa06c8ae5ba28d3aaa"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">uint8_t GPIO_ReadInputDataBit </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *&#160;</td>
<td class="paramname"><em>GPIOx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t&#160;</td>
<td class="paramname"><em>GPIO_Pin</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Reads the specified input port pin. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">GPIOx</td><td>where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices. x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </td></tr>
<tr><td class="paramname">GPIO_Pin</td><td>specifies the port bit to read. This parameter can be GPIO_Pin_x where x can be (0..15). </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">The</td><td>input port pin value. </td></tr>
</table>
</dd>
</dl>
<p><div class="dynheader">
Here is the caller graph for this function:</div>
<div class="dyncontent">
<div class="center"><img src="group___g_p_i_o___group2_ga98772ef6b639b3fa06c8ae5ba28d3aaa_icgraph.png" border="0" usemap="#group___g_p_i_o___group2_ga98772ef6b639b3fa06c8ae5ba28d3aaa_icgraph" alt=""/></div>
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</p>
</div>
</div>
<a class="anchor" id="gaf8938a34280b7dc3e39872a7c17bb323"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">uint16_t GPIO_ReadOutputData </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *&#160;</td>
<td class="paramname"><em>GPIOx</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Reads the specified GPIO output data port. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">GPIOx</td><td>where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices. x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">GPIO</td><td>output data port value. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga138270f8695b105b7c6ed405792919c1"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">uint8_t GPIO_ReadOutputDataBit </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *&#160;</td>
<td class="paramname"><em>GPIOx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t&#160;</td>
<td class="paramname"><em>GPIO_Pin</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Reads the specified output data port bit. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">GPIOx</td><td>where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices. x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </td></tr>
<tr><td class="paramname">GPIO_Pin</td><td>specifies the port bit to read. This parameter can be GPIO_Pin_x where x can be (0..15). </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">The</td><td>output port pin value. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga6fcd35b207a66608dd2c9d7de9247dc8"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void GPIO_ResetBits </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *&#160;</td>
<td class="paramname"><em>GPIOx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t&#160;</td>
<td class="paramname"><em>GPIO_Pin</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Clears the selected data port bits. </p>
<dl class="section note"><dt>Note</dt><dd>This functions uses GPIOx_BSRR register to allow atomic read/modify accesses. In this way, there is no risk of an IRQ occurring between the read and the modify access. </dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">GPIOx</td><td>where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices. x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </td></tr>
<tr><td class="paramname">GPIO_Pin</td><td>specifies the port bits to be written. This parameter can be any combination of GPIO_Pin_x where x can be (0..15). </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">None</td><td></td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga9e1352eed7c6620e18af2d86f6b6ff8e"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void GPIO_SetBits </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *&#160;</td>
<td class="paramname"><em>GPIOx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t&#160;</td>
<td class="paramname"><em>GPIO_Pin</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Sets the selected data port bits. </p>
<dl class="section note"><dt>Note</dt><dd>This functions uses GPIOx_BSRR register to allow atomic read/modify accesses. In this way, there is no risk of an IRQ occurring between the read and the modify access. </dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">GPIOx</td><td>where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices. x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </td></tr>
<tr><td class="paramname">GPIO_Pin</td><td>specifies the port bits to be written. This parameter can be any combination of GPIO_Pin_x where x can be (0..15). </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">None</td><td></td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="gac1b837c66258872740d5f89f23549ab1"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void GPIO_ToggleBits </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *&#160;</td>
<td class="paramname"><em>GPIOx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t&#160;</td>
<td class="paramname"><em>GPIO_Pin</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Toggles the specified GPIO pins.. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">GPIOx</td><td>where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices. x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </td></tr>
<tr><td class="paramname">GPIO_Pin</td><td>Specifies the pins to be toggled. </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">None</td><td></td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="gaa925f19c8547a00c7a0c269a84873bf9"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void GPIO_Write </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *&#160;</td>
<td class="paramname"><em>GPIOx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t&#160;</td>
<td class="paramname"><em>PortVal</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Writes data to the specified GPIO data port. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">GPIOx</td><td>where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices. x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </td></tr>
<tr><td class="paramname">PortVal</td><td>specifies the value to be written to the port output data register. </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">None</td><td></td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga8f7b237fd744d9f7456fbe0da47a9b80"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void GPIO_WriteBit </td>
<td>(</td>
<td class="paramtype"><a class="el" href="struct_g_p_i_o___type_def.html">GPIO_TypeDef</a> *&#160;</td>
<td class="paramname"><em>GPIOx</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint16_t&#160;</td>
<td class="paramname"><em>GPIO_Pin</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___g_p_i_o.html#ga176130b21c0e719121470a6042d4cf19">BitAction</a>&#160;</td>
<td class="paramname"><em>BitVal</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Sets or clears the selected data port bit. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">GPIOx</td><td>where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices. x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. </td></tr>
<tr><td class="paramname">GPIO_Pin</td><td>specifies the port bit to be written. This parameter can be one of GPIO_Pin_x where x can be (0..15). </td></tr>
<tr><td class="paramname">BitVal</td><td>specifies the value to be written to the selected bit. This parameter can be one of the BitAction enum values: <ul>
<li>Bit_RESET: to clear the port pin </li>
<li>Bit_SET: to set the port pin </li>
</ul>
</td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">None</td><td></td></tr>
</table>
</dd>
</dl>
</div>
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