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536 lines
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<a href="#func-members">Functions</a> </div>
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<div class="title">Initialization and Configuration 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___u_s_a_r_t.html">USART</a> » <a class="el" href="group___u_s_a_r_t___private___functions.html">USART_Private_Functions</a></div></div> </div>
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<p>Initialization and Configuration functions.
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<a href="#details">More...</a></p>
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Collaboration diagram for Initialization and Configuration functions:</div>
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<center><table><tr><td><img src="group___u_s_a_r_t___group1.png" border="0" alt="" usemap="#group______u__s__a__r__t______group1"/>
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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:ga2f8e1ce72da21b6539d8e1f299ec3b0d"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___u_s_a_r_t___group1.html#ga2f8e1ce72da21b6539d8e1f299ec3b0d">USART_DeInit</a> (<a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> *USARTx)</td></tr>
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<tr class="memdesc:ga2f8e1ce72da21b6539d8e1f299ec3b0d"><td class="mdescLeft"> </td><td class="mdescRight">Deinitializes the USARTx peripheral registers to their default reset values. <a href="#ga2f8e1ce72da21b6539d8e1f299ec3b0d">More...</a><br /></td></tr>
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<tr class="separator:ga2f8e1ce72da21b6539d8e1f299ec3b0d"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga98da340ea0324002ba1b4263e91ab2ff"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___u_s_a_r_t___group1.html#ga98da340ea0324002ba1b4263e91ab2ff">USART_Init</a> (<a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> *USARTx, <a class="el" href="struct_u_s_a_r_t___init_type_def.html">USART_InitTypeDef</a> *USART_InitStruct)</td></tr>
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<tr class="memdesc:ga98da340ea0324002ba1b4263e91ab2ff"><td class="mdescLeft"> </td><td class="mdescRight">Initializes the USARTx peripheral according to the specified parameters in the USART_InitStruct . <a href="#ga98da340ea0324002ba1b4263e91ab2ff">More...</a><br /></td></tr>
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<tr class="separator:ga98da340ea0324002ba1b4263e91ab2ff"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga34e1faa2f312496c16cfd05155f4c8b1"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___u_s_a_r_t___group1.html#ga34e1faa2f312496c16cfd05155f4c8b1">USART_StructInit</a> (<a class="el" href="struct_u_s_a_r_t___init_type_def.html">USART_InitTypeDef</a> *USART_InitStruct)</td></tr>
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<tr class="memdesc:ga34e1faa2f312496c16cfd05155f4c8b1"><td class="mdescLeft"> </td><td class="mdescRight">Fills each USART_InitStruct member with its default value. <a href="#ga34e1faa2f312496c16cfd05155f4c8b1">More...</a><br /></td></tr>
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<tr class="separator:ga34e1faa2f312496c16cfd05155f4c8b1"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gadb50c7a2175c91acd3728f8eefd0c63d"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___u_s_a_r_t___group1.html#gadb50c7a2175c91acd3728f8eefd0c63d">USART_ClockInit</a> (<a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> *USARTx, <a class="el" href="struct_u_s_a_r_t___clock_init_type_def.html">USART_ClockInitTypeDef</a> *USART_ClockInitStruct)</td></tr>
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<tr class="memdesc:gadb50c7a2175c91acd3728f8eefd0c63d"><td class="mdescLeft"> </td><td class="mdescRight">Initializes the USARTx peripheral Clock according to the specified parameters in the USART_ClockInitStruct . <a href="#gadb50c7a2175c91acd3728f8eefd0c63d">More...</a><br /></td></tr>
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<tr class="separator:gadb50c7a2175c91acd3728f8eefd0c63d"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga59df27d0adda18b16ee28d47672cc724"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___u_s_a_r_t___group1.html#ga59df27d0adda18b16ee28d47672cc724">USART_ClockStructInit</a> (<a class="el" href="struct_u_s_a_r_t___clock_init_type_def.html">USART_ClockInitTypeDef</a> *USART_ClockInitStruct)</td></tr>
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<tr class="memdesc:ga59df27d0adda18b16ee28d47672cc724"><td class="mdescLeft"> </td><td class="mdescRight">Fills each USART_ClockInitStruct member with its default value. <a href="#ga59df27d0adda18b16ee28d47672cc724">More...</a><br /></td></tr>
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<tr class="separator:ga59df27d0adda18b16ee28d47672cc724"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga45e51626739c5f22a6567c8a85d1d85e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___u_s_a_r_t___group1.html#ga45e51626739c5f22a6567c8a85d1d85e">USART_Cmd</a> (<a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> *USARTx, FunctionalState NewState)</td></tr>
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<tr class="memdesc:ga45e51626739c5f22a6567c8a85d1d85e"><td class="mdescLeft"> </td><td class="mdescRight">Enables or disables the specified USART peripheral. <a href="#ga45e51626739c5f22a6567c8a85d1d85e">More...</a><br /></td></tr>
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<tr class="separator:ga45e51626739c5f22a6567c8a85d1d85e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gaf5da8f2eee8245425584d85d4f62cc33"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___u_s_a_r_t___group1.html#gaf5da8f2eee8245425584d85d4f62cc33">USART_SetPrescaler</a> (<a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> *USARTx, uint8_t USART_Prescaler)</td></tr>
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<tr class="memdesc:gaf5da8f2eee8245425584d85d4f62cc33"><td class="mdescLeft"> </td><td class="mdescRight">Sets the system clock prescaler. <a href="#gaf5da8f2eee8245425584d85d4f62cc33">More...</a><br /></td></tr>
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<tr class="separator:gaf5da8f2eee8245425584d85d4f62cc33"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga3897bab07491d9239f8a238a9a7cddea"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___u_s_a_r_t___group1.html#ga3897bab07491d9239f8a238a9a7cddea">USART_OverSampling8Cmd</a> (<a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> *USARTx, FunctionalState NewState)</td></tr>
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<tr class="memdesc:ga3897bab07491d9239f8a238a9a7cddea"><td class="mdescLeft"> </td><td class="mdescRight">Enables or disables the USART's 8x oversampling mode. <a href="#ga3897bab07491d9239f8a238a9a7cddea">More...</a><br /></td></tr>
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<tr class="separator:ga3897bab07491d9239f8a238a9a7cddea"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga3ed89ea8765d851510cfe90f7d90cbbb"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___u_s_a_r_t___group1.html#ga3ed89ea8765d851510cfe90f7d90cbbb">USART_OneBitMethodCmd</a> (<a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> *USARTx, FunctionalState NewState)</td></tr>
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<tr class="memdesc:ga3ed89ea8765d851510cfe90f7d90cbbb"><td class="mdescLeft"> </td><td class="mdescRight">Enables or disables the USART's one bit sampling method. <a href="#ga3ed89ea8765d851510cfe90f7d90cbbb">More...</a><br /></td></tr>
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<tr class="separator:ga3ed89ea8765d851510cfe90f7d90cbbb"><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>Initialization and Configuration functions. </p>
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<pre class="fragment"> ===============================================================================
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##### Initialization and Configuration functions #####
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===============================================================================
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[..]
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This subsection provides a set of functions allowing to initialize the USART
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in asynchronous and in synchronous modes.
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(+) For the asynchronous mode only these parameters can be configured:
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(++) Baud Rate
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(++) Word Length
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(++) Stop Bit
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(++) Parity: If the parity is enabled, then the MSB bit of the data written
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in the data register is transmitted but is changed by the parity bit.
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Depending on the frame length defined by the M bit (8-bits or 9-bits),
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the possible USART frame formats are as listed in the following table:
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+-------------------------------------------------------------+
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| M bit | PCE bit | USART frame |
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|---------------------|---------------------------------------|
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| 0 | 0 | | SB | 8 bit data | STB | |
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|---------|-----------|---------------------------------------|
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| 0 | 1 | | SB | 7 bit data | PB | STB | |
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|---------|-----------|---------------------------------------|
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| 1 | 0 | | SB | 9 bit data | STB | |
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|---------|-----------|---------------------------------------|
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| 1 | 1 | | SB | 8 bit data | PB | STB | |
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+-------------------------------------------------------------+
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(++) Hardware flow control
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(++) Receiver/transmitter modes
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[..]
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The USART_Init() function follows the USART asynchronous configuration
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procedure (details for the procedure are available in reference manual (RM0090)).
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(+) For the synchronous mode in addition to the asynchronous mode parameters these
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parameters should be also configured:
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(++) USART Clock Enabled
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(++) USART polarity
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(++) USART phase
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(++) USART LastBit
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[..]
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These parameters can be configured using the USART_ClockInit() function.</pre> <h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="gadb50c7a2175c91acd3728f8eefd0c63d"></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 USART_ClockInit </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> * </td>
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<td class="paramname"><em>USARTx</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_u_s_a_r_t___clock_init_type_def.html">USART_ClockInitTypeDef</a> * </td>
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<td class="paramname"><em>USART_ClockInitStruct</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>Initializes the USARTx peripheral Clock according to the specified parameters in the USART_ClockInitStruct . </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">USARTx</td><td>where x can be 1, 2, 3 or 6 to select the USART peripheral. </td></tr>
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<tr><td class="paramname">USART_ClockInitStruct</td><td>pointer to a <a class="el" href="struct_u_s_a_r_t___clock_init_type_def.html" title="USART Clock Init Structure definition. ">USART_ClockInitTypeDef</a> structure that contains the configuration information for the specified USART peripheral. </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 Smart Card and Synchronous modes are not available for UART4 and UART5. </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="ga59df27d0adda18b16ee28d47672cc724"></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 USART_ClockStructInit </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_u_s_a_r_t___clock_init_type_def.html">USART_ClockInitTypeDef</a> * </td>
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<td class="paramname"><em>USART_ClockInitStruct</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>Fills each USART_ClockInitStruct member with its default value. </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">USART_ClockInitStruct</td><td>pointer to a <a class="el" href="struct_u_s_a_r_t___clock_init_type_def.html" title="USART Clock Init Structure definition. ">USART_ClockInitTypeDef</a> structure which will be initialized. </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="ga45e51626739c5f22a6567c8a85d1d85e"></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 USART_Cmd </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> * </td>
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<td class="paramname"><em>USARTx</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">FunctionalState </td>
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<td class="paramname"><em>NewState</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>Enables or disables the specified USART peripheral. </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">USARTx</td><td>where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral. </td></tr>
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<tr><td class="paramname">NewState</td><td>new state of the USARTx peripheral. 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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<td class="memname">void USART_DeInit </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> * </td>
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<td class="paramname"><em>USARTx</em></td><td>)</td>
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<p>Deinitializes the USARTx peripheral registers to their default reset values. </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">USARTx</td><td>where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral. </td></tr>
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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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<area shape="rect" id="node2" href="group___r_c_c.html#gad94553850ac07106a27ee85fec37efdf" title="Forces or releases High Speed APB (APB2) peripheral reset. " alt="" coords="159,5,347,32"/><area shape="rect" id="node3" href="group___r_c_c.html#gab197ae4369c10b92640a733b40ed2801" title="Forces or releases Low Speed APB (APB1) peripheral reset. " alt="" coords="159,56,347,83"/></map>
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<td class="memname">void USART_Init </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> * </td>
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<td class="paramname"><em>USARTx</em>, </td>
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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_u_s_a_r_t___init_type_def.html">USART_InitTypeDef</a> * </td>
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<td class="paramname"><em>USART_InitStruct</em> </td>
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<td></td>
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<td>)</td>
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<p>Initializes the USARTx peripheral according to the specified parameters in the USART_InitStruct . </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">USARTx</td><td>where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral. </td></tr>
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<tr><td class="paramname">USART_InitStruct</td><td>pointer to a <a class="el" href="struct_u_s_a_r_t___init_type_def.html" title="USART Init Structure definition. ">USART_InitTypeDef</a> structure that contains the configuration information for the specified USART peripheral. </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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<td class="memname">void USART_OneBitMethodCmd </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> * </td>
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<td class="paramname"><em>USARTx</em>, </td>
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<td class="paramkey"></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>
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<td></td>
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<td>)</td>
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<p>Enables or disables the USART's one bit sampling method. </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">USARTx</td><td>where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral. </td></tr>
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<tr><td class="paramname">NewState</td><td>new state of the USART one bit sampling method. 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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<td class="memname">void USART_OverSampling8Cmd </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> * </td>
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<td class="paramname"><em>USARTx</em>, </td>
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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">FunctionalState </td>
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<td class="paramname"><em>NewState</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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</div><div class="memdoc">
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<p>Enables or disables the USART's 8x oversampling mode. </p>
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<dl class="section note"><dt>Note</dt><dd>This function has to be called before calling <a class="el" href="group___u_s_a_r_t___group1.html#ga98da340ea0324002ba1b4263e91ab2ff" title="Initializes the USARTx peripheral according to the specified parameters in the USART_InitStruct ...">USART_Init()</a> function in order to have correct baudrate Divider value. </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">USARTx</td><td>where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral. </td></tr>
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<tr><td class="paramname">NewState</td><td>new state of the USART 8x oversampling mode. 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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<td class="memname">void USART_SetPrescaler </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_u_s_a_r_t___type_def.html">USART_TypeDef</a> * </td>
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<td class="paramname"><em>USARTx</em>, </td>
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<td class="paramkey"></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>USART_Prescaler</em> </td>
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<td></td>
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<td>)</td>
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</div><div class="memdoc">
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<p>Sets the system clock prescaler. </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">USARTx</td><td>where x can be 1, 2, 3, 4, 5, 6, 7 or 8 to select the USART or UART peripheral. </td></tr>
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<tr><td class="paramname">USART_Prescaler</td><td>specifies the prescaler clock. </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 function is used for IrDA mode with UART4 and UART5. </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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<a class="anchor" id="ga34e1faa2f312496c16cfd05155f4c8b1"></a>
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<td class="memname">void USART_StructInit </td>
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<td>(</td>
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<td class="paramtype"><a class="el" href="struct_u_s_a_r_t___init_type_def.html">USART_InitTypeDef</a> * </td>
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<td class="paramname"><em>USART_InitStruct</em></td><td>)</td>
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<td></td>
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</div><div class="memdoc">
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<p>Fills each USART_InitStruct member with its default value. </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">USART_InitStruct</td><td>pointer to a <a class="el" href="struct_u_s_a_r_t___init_type_def.html" title="USART Init Structure definition. ">USART_InitTypeDef</a> structure which will be initialized. </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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