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654 lines
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<a href="#nested-classes">Data Structures</a> |
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<a href="#typedef-members">Typedefs</a> |
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<a href="#enum-members">Enumerations</a> </div>
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<div class="headertitle">
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<div class="title">KPP: KeyPad Port Driver</div> </div>
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<div class="contents">
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<a name="details" id="details"></a><h2 class="groupheader">Overview</h2>
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<p>The MCUXpresso SDK provides a peripheral driver for the KeyPad Port block of MCUXpresso SDK devices.</p>
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<h1>KPP: KeyPad Port Driver</h1>
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<h2>KPP Initialization Operation</h2>
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<p>The KPP Initialize is to initialize for common configure: gate the KPP clock, configure columns, and rows features. The KPP Deinitialize is to ungate the clock.</p>
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<h2>KPP Basic Operation</h2>
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<p>The KPP provide the function to enable/disable interrupts. The KPP provide key press scanning function KPP_keyPressScanning. This API should be called by the Interrupt handler in application. KPP still provides functions to get and clear status flags.</p>
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<h1><a class="anchor" id="KPPTpyUC"></a>
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Typical use case</h1>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
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Data Structures</h2></td></tr>
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<tr class="memitem:a00428"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#a00428">_kpp_config</a></td></tr>
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<tr class="memdesc:a00428"><td class="mdescLeft"> </td><td class="mdescRight">Lists of KPP status. <a href="a00046.html#a00428">More...</a><br/></td></tr>
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<tr class="separator:a00428"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>
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Typedefs</h2></td></tr>
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<tr class="memitem:ga750601427065c87c4daf8fc07091d039"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="a00046.html#ga8c6f14f0861416aab52182b088863d5b">_kpp_interrupt_enable</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga750601427065c87c4daf8fc07091d039">kpp_interrupt_enable_t</a></td></tr>
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<tr class="memdesc:ga750601427065c87c4daf8fc07091d039"><td class="mdescLeft"> </td><td class="mdescRight">List of interrupts supported by the peripheral. <a href="#ga750601427065c87c4daf8fc07091d039">More...</a><br/></td></tr>
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<tr class="separator:ga750601427065c87c4daf8fc07091d039"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga5c752eb676c0517a7cd9bfc52e4744aa"><td class="memItemLeft" align="right" valign="top">typedef enum <a class="el" href="a00046.html#gafab0e664fb713522de61aa4907426ca3">_kpp_sync_operation</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga5c752eb676c0517a7cd9bfc52e4744aa">kpp_sync_operation_t</a></td></tr>
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<tr class="memdesc:ga5c752eb676c0517a7cd9bfc52e4744aa"><td class="mdescLeft"> </td><td class="mdescRight">Lists of KPP synchronize chain operation. <a href="#ga5c752eb676c0517a7cd9bfc52e4744aa">More...</a><br/></td></tr>
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<tr class="separator:ga5c752eb676c0517a7cd9bfc52e4744aa"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gaf36399349f3826313f180a4798ac3275"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="a00046.html#a00428">_kpp_config</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#gaf36399349f3826313f180a4798ac3275">kpp_config_t</a></td></tr>
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<tr class="memdesc:gaf36399349f3826313f180a4798ac3275"><td class="mdescLeft"> </td><td class="mdescRight">Lists of KPP status. <a href="#gaf36399349f3826313f180a4798ac3275">More...</a><br/></td></tr>
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<tr class="separator:gaf36399349f3826313f180a4798ac3275"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="enum-members"></a>
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Enumerations</h2></td></tr>
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<tr class="memitem:ga8c6f14f0861416aab52182b088863d5b"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga8c6f14f0861416aab52182b088863d5b">_kpp_interrupt_enable</a> { <br/>
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  <a class="el" href="a00046.html#gga8c6f14f0861416aab52182b088863d5bab4f673ab2f4dfc055981eed98465d8b2">kKPP_keyDepressInterrupt</a> = KPP_KPSR_KDIE_MASK,
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<br/>
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  <a class="el" href="a00046.html#gga8c6f14f0861416aab52182b088863d5ba760b827e5a10ba43afac4c5a5f4449df">kKPP_keyReleaseInterrupt</a> = KPP_KPSR_KRIE_MASK
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<br/>
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}</td></tr>
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<tr class="memdesc:ga8c6f14f0861416aab52182b088863d5b"><td class="mdescLeft"> </td><td class="mdescRight">List of interrupts supported by the peripheral. <a href="a00046.html#ga8c6f14f0861416aab52182b088863d5b">More...</a><br/></td></tr>
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<tr class="separator:ga8c6f14f0861416aab52182b088863d5b"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gafab0e664fb713522de61aa4907426ca3"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#gafab0e664fb713522de61aa4907426ca3">_kpp_sync_operation</a> { <br/>
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  <a class="el" href="a00046.html#ggafab0e664fb713522de61aa4907426ca3a362de7775b6d24295feddbb8cc93550b">kKPP_ClearKeyDepressSyncChain</a> = KPP_KPSR_KDSC_MASK,
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<br/>
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  <a class="el" href="a00046.html#ggafab0e664fb713522de61aa4907426ca3a2938765c6adf7fcf5128895478876aa5">kKPP_SetKeyReleasesSyncChain</a> = KPP_KPSR_KRSS_MASK
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<br/>
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}</td></tr>
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<tr class="memdesc:gafab0e664fb713522de61aa4907426ca3"><td class="mdescLeft"> </td><td class="mdescRight">Lists of KPP synchronize chain operation. <a href="a00046.html#gafab0e664fb713522de61aa4907426ca3">More...</a><br/></td></tr>
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<tr class="separator:gafab0e664fb713522de61aa4907426ca3"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="member-group"></a>
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Driver version</h2></td></tr>
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<tr class="memitem:ga35c20878a9d0b578ca2bbf50d98666a8"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga35c20878a9d0b578ca2bbf50d98666a8">FSL_KPP_DRIVER_VERSION</a>   (<a class="el" href="a00272.html#ga812138aa3315b0c6953c1a26130bcc37">MAKE_VERSION</a>(2, 0, 0))</td></tr>
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<tr class="memdesc:ga35c20878a9d0b578ca2bbf50d98666a8"><td class="mdescLeft"> </td><td class="mdescRight">KPP driver version 2.0.0. <a href="#ga35c20878a9d0b578ca2bbf50d98666a8">More...</a><br/></td></tr>
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<tr class="separator:ga35c20878a9d0b578ca2bbf50d98666a8"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="member-group"></a>
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Initialization and De-initialization</h2></td></tr>
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<tr class="memitem:ga773203cef9b50a6c5864f78c05cb0c83"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga773203cef9b50a6c5864f78c05cb0c83">KPP_Init</a> (KPP_Type *base, <a class="el" href="a00046.html#gaf36399349f3826313f180a4798ac3275">kpp_config_t</a> *configure)</td></tr>
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<tr class="memdesc:ga773203cef9b50a6c5864f78c05cb0c83"><td class="mdescLeft"> </td><td class="mdescRight">KPP initialize. <a href="#ga773203cef9b50a6c5864f78c05cb0c83">More...</a><br/></td></tr>
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<tr class="separator:ga773203cef9b50a6c5864f78c05cb0c83"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga910f3aec15296a1d993f9b4963a152fd"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga910f3aec15296a1d993f9b4963a152fd">KPP_Deinit</a> (KPP_Type *base)</td></tr>
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<tr class="memdesc:ga910f3aec15296a1d993f9b4963a152fd"><td class="mdescLeft"> </td><td class="mdescRight">Deinitializes the KPP module and gates the clock. <a href="#ga910f3aec15296a1d993f9b4963a152fd">More...</a><br/></td></tr>
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<tr class="separator:ga910f3aec15296a1d993f9b4963a152fd"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="member-group"></a>
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KPP Basic Operation</h2></td></tr>
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<tr class="memitem:ga4d8bc3929af0678c182047884c50f7db"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga4d8bc3929af0678c182047884c50f7db">KPP_EnableInterrupts</a> (KPP_Type *base, uint16_t mask)</td></tr>
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<tr class="memdesc:ga4d8bc3929af0678c182047884c50f7db"><td class="mdescLeft"> </td><td class="mdescRight">Enable the interrupt. <a href="#ga4d8bc3929af0678c182047884c50f7db">More...</a><br/></td></tr>
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<tr class="separator:ga4d8bc3929af0678c182047884c50f7db"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gaa7de1f02a42c4176605cf7053f78baab"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#gaa7de1f02a42c4176605cf7053f78baab">KPP_DisableInterrupts</a> (KPP_Type *base, uint16_t mask)</td></tr>
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<tr class="memdesc:gaa7de1f02a42c4176605cf7053f78baab"><td class="mdescLeft"> </td><td class="mdescRight">Disable the interrupt. <a href="#gaa7de1f02a42c4176605cf7053f78baab">More...</a><br/></td></tr>
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<tr class="separator:gaa7de1f02a42c4176605cf7053f78baab"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga7e0b699fd3ac19ce1bbb95418871ab3e"><td class="memItemLeft" align="right" valign="top">static uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga7e0b699fd3ac19ce1bbb95418871ab3e">KPP_GetStatusFlag</a> (KPP_Type *base)</td></tr>
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<tr class="memdesc:ga7e0b699fd3ac19ce1bbb95418871ab3e"><td class="mdescLeft"> </td><td class="mdescRight">Gets the KPP interrupt event status. <a href="#ga7e0b699fd3ac19ce1bbb95418871ab3e">More...</a><br/></td></tr>
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<tr class="separator:ga7e0b699fd3ac19ce1bbb95418871ab3e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gad5f48c3a6027700e16a3f9bf477fa7e6"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#gad5f48c3a6027700e16a3f9bf477fa7e6">KPP_ClearStatusFlag</a> (KPP_Type *base, uint16_t mask)</td></tr>
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<tr class="memdesc:gad5f48c3a6027700e16a3f9bf477fa7e6"><td class="mdescLeft"> </td><td class="mdescRight">Clears KPP status flag. <a href="#gad5f48c3a6027700e16a3f9bf477fa7e6">More...</a><br/></td></tr>
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<tr class="separator:gad5f48c3a6027700e16a3f9bf477fa7e6"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga7a240001a7a2b5fb84754a9a75afcb86"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga7a240001a7a2b5fb84754a9a75afcb86">KPP_SetSynchronizeChain</a> (KPP_Type *base, uint16_t mask)</td></tr>
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<tr class="memdesc:ga7a240001a7a2b5fb84754a9a75afcb86"><td class="mdescLeft"> </td><td class="mdescRight">Set KPP synchronization chain. <a href="#ga7a240001a7a2b5fb84754a9a75afcb86">More...</a><br/></td></tr>
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<tr class="separator:ga7a240001a7a2b5fb84754a9a75afcb86"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga636803e3b1c99ec6dc9756548d9ef7b9"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ga636803e3b1c99ec6dc9756548d9ef7b9">KPP_keyPressScanning</a> (KPP_Type *base, uint8_t *data, uint32_t clockSrc_Hz)</td></tr>
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<tr class="memdesc:ga636803e3b1c99ec6dc9756548d9ef7b9"><td class="mdescLeft"> </td><td class="mdescRight">Keypad press scanning. <a href="#ga636803e3b1c99ec6dc9756548d9ef7b9">More...</a><br/></td></tr>
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<tr class="separator:ga636803e3b1c99ec6dc9756548d9ef7b9"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<hr/><h2 class="groupheader">Data Structure Documentation</h2>
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<a name="a00428" id="a00428"></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">struct _kpp_config</td>
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</table>
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</div><div class="memdoc">
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<div class="textblock"></div><table class="memberdecls">
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<tr><td colspan="2"><h3>Data Fields</h3></td></tr>
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<tr class="memitem:a5c9fb5f79cfb2b03b884a47718ccd007"><td class="memItemLeft" align="right" valign="top">uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#a5c9fb5f79cfb2b03b884a47718ccd007">activeRow</a></td></tr>
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<tr class="memdesc:a5c9fb5f79cfb2b03b884a47718ccd007"><td class="mdescLeft"> </td><td class="mdescRight">The row number: bit 7 ~ 0 represents the row 7 ~ 0. <a href="#a5c9fb5f79cfb2b03b884a47718ccd007">More...</a><br/></td></tr>
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<tr class="separator:a5c9fb5f79cfb2b03b884a47718ccd007"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ae7ef5ba717a420f79db47bf54059c53f"><td class="memItemLeft" align="right" valign="top">uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ae7ef5ba717a420f79db47bf54059c53f">activeColumn</a></td></tr>
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<tr class="memdesc:ae7ef5ba717a420f79db47bf54059c53f"><td class="mdescLeft"> </td><td class="mdescRight">The column number: bit 7 ~ 0 represents the column 7 ~ 0. <a href="#ae7ef5ba717a420f79db47bf54059c53f">More...</a><br/></td></tr>
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<tr class="memitem:ad095a892349a9e98cb99b75a3cf82723"><td class="memItemLeft" align="right" valign="top">uint16_t </td><td class="memItemRight" valign="bottom"><a class="el" href="a00046.html#ad095a892349a9e98cb99b75a3cf82723">interrupt</a></td></tr>
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<tr class="memdesc:ad095a892349a9e98cb99b75a3cf82723"><td class="mdescLeft"> </td><td class="mdescRight">KPP interrupt source. <a href="#ad095a892349a9e98cb99b75a3cf82723">More...</a><br/></td></tr>
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<h4 class="groupheader">Field Documentation</h4>
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<td class="memname">uint8_t _kpp_config::activeRow</td>
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<td class="memname">uint8_t _kpp_config::activeColumn</td>
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<td class="memname">uint16_t _kpp_config::interrupt</td>
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<p>A logical OR of "kpp_interrupt_enable_t". </p>
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<h2 class="groupheader">Macro Definition Documentation</h2>
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<td class="memname">#define FSL_KPP_DRIVER_VERSION   (<a class="el" href="a00272.html#ga812138aa3315b0c6953c1a26130bcc37">MAKE_VERSION</a>(2, 0, 0))</td>
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<h2 class="groupheader">Typedef Documentation</h2>
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<td class="memname">typedef enum <a class="el" href="a00046.html#ga8c6f14f0861416aab52182b088863d5b">_kpp_interrupt_enable</a> <a class="el" href="a00046.html#ga750601427065c87c4daf8fc07091d039">kpp_interrupt_enable_t</a></td>
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<p>This enumeration uses one-bot encoding to allow a logical OR of multiple members. Members usually map to interrupt enable bits in one or more peripheral registers. </p>
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<td class="memname">typedef enum <a class="el" href="a00046.html#gafab0e664fb713522de61aa4907426ca3">_kpp_sync_operation</a> <a class="el" href="a00046.html#ga5c752eb676c0517a7cd9bfc52e4744aa">kpp_sync_operation_t</a></td>
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<td class="memname">typedef struct <a class="el" href="a00046.html#a00428">_kpp_config</a> <a class="el" href="a00046.html#gaf36399349f3826313f180a4798ac3275">kpp_config_t</a></td>
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<h2 class="groupheader">Enumeration Type Documentation</h2>
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<td class="memname">enum <a class="el" href="a00046.html#ga8c6f14f0861416aab52182b088863d5b">_kpp_interrupt_enable</a></td>
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<p>This enumeration uses one-bot encoding to allow a logical OR of multiple members. Members usually map to interrupt enable bits in one or more peripheral registers. </p>
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<table class="fieldtable">
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><em><a class="anchor" id="gga8c6f14f0861416aab52182b088863d5bab4f673ab2f4dfc055981eed98465d8b2"></a>kKPP_keyDepressInterrupt</em> </td><td class="fielddoc">
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<p>Keypad depress interrupt source. </p>
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</td></tr>
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<tr><td class="fieldname"><em><a class="anchor" id="gga8c6f14f0861416aab52182b088863d5ba760b827e5a10ba43afac4c5a5f4449df"></a>kKPP_keyReleaseInterrupt</em> </td><td class="fielddoc">
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<p>Keypad release interrupt source. </p>
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</td></tr>
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<td class="memname">enum <a class="el" href="a00046.html#gafab0e664fb713522de61aa4907426ca3">_kpp_sync_operation</a></td>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><em><a class="anchor" id="ggafab0e664fb713522de61aa4907426ca3a362de7775b6d24295feddbb8cc93550b"></a>kKPP_ClearKeyDepressSyncChain</em> </td><td class="fielddoc">
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<p>Keypad depress interrupt status. </p>
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</td></tr>
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<tr><td class="fieldname"><em><a class="anchor" id="ggafab0e664fb713522de61aa4907426ca3a2938765c6adf7fcf5128895478876aa5"></a>kKPP_SetKeyReleasesSyncChain</em> </td><td class="fielddoc">
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<p>Keypad release interrupt status. </p>
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<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">void KPP_Init </td>
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<td>(</td>
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<td class="paramtype">KPP_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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<td class="paramtype"><a class="el" href="a00046.html#gaf36399349f3826313f180a4798ac3275">kpp_config_t</a> * </td>
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<td class="paramname"><em>configure</em> </td>
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<p>This function ungates the KPP clock and initializes KPP. This function must be called before calling any other KPP driver functions.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">base</td><td>KPP peripheral base address. </td></tr>
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<tr><td class="paramname">configure</td><td>The KPP configuration structure pointer. </td></tr>
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<td class="memname">void KPP_Deinit </td>
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<td>(</td>
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<td class="paramtype">KPP_Type * </td>
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<td class="paramname"><em>base</em></td><td>)</td>
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<p>This function gates the KPP clock. As a result, the KPP module doesn't work after calling this function.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">base</td><td>KPP peripheral base address. </td></tr>
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<td class="memname">static void KPP_EnableInterrupts </td>
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<td>(</td>
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<td class="paramtype">KPP_Type * </td>
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<td class="paramtype">uint16_t </td>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">base</td><td>KPP peripheral base address. </td></tr>
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<tr><td class="paramname">mask</td><td>KPP interrupts to enable. This is a logical OR of the enumeration :: kpp_interrupt_enable_t. </td></tr>
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<td class="memname">static void KPP_DisableInterrupts </td>
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<td>(</td>
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<td class="paramtype">KPP_Type * </td>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">base</td><td>KPP peripheral base address. </td></tr>
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<tr><td class="paramname">mask</td><td>KPP interrupts to disable. This is a logical OR of the enumeration :: kpp_interrupt_enable_t. </td></tr>
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<td class="memname">static uint16_t KPP_GetStatusFlag </td>
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<td>(</td>
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<dl class="params"><dt>Parameters</dt><dd>
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<dl class="section return"><dt>Returns</dt><dd>The status of the KPP. Application can use the enum type in the "kpp_interrupt_enable_t" to get the right status of the related event. </dd></dl>
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<dl class="params"><dt>Parameters</dt><dd>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">base</td><td>KPP peripheral base address. </td></tr>
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<tr><td class="paramname">mask</td><td>KPP mask to be cleared. This is a logical OR of the enumeration :: kpp_sync_operation_t. </td></tr>
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<td class="memname">void KPP_keyPressScanning </td>
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<td>(</td>
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<td class="paramtype">KPP_Type * </td>
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<td class="paramname"><em>base</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">uint8_t * </td>
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<td class="paramname"><em>data</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">uint32_t </td>
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<td class="paramname"><em>clockSrc_Hz</em> </td>
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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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</div><div class="memdoc">
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<p>This function will scanning all columns and rows. so all scanning data will be stored in the data pointer.</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">base</td><td>KPP peripheral base address. </td></tr>
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<tr><td class="paramname">data</td><td>KPP key press scanning data. The data buffer should be prepared with length at least equal to KPP_KEYPAD_COLUMNNUM_MAX * KPP_KEYPAD_ROWNUM_MAX. the data pointer is recommended to be a array like uint8_t data[KPP_KEYPAD_COLUMNNUM_MAX]. for example the data[2] = 4, that means in column 1 row 2 has a key press event. </td></tr>
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<tr><td class="paramname">clockSrc_Hz</td><td>Source clock. </td></tr>
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</table>
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</dd>
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</dl>
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