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487 lines
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<div class="header">
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<div class="title">DMAMUX: Direct Memory Access Multiplexer Driver</div> </div>
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</div><!--header-->
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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 Direct Memory Access Multiplexer (DMAMUX) of MCUXpresso SDK devices.</p>
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<h1><a class="anchor" id="DMAMUXTypicalUseCase"></a>
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Typical use case</h1>
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<h2><a class="anchor" id="DMAMUXOper"></a>
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DMAMUX Operation</h2>
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<p>Refer to the driver examples codes located at <SDK_ROOT>/boards/<BOARD>/driver_examples/dmamux </p>
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<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:ga52b927e4f978ddf42faf0acf6de3df57"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00263.html#ga52b927e4f978ddf42faf0acf6de3df57">FSL_DMAMUX_DRIVER_VERSION</a>   (<a class="el" href="a00260.html#ga812138aa3315b0c6953c1a26130bcc37">MAKE_VERSION</a>(2, 1, 0))</td></tr>
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<tr class="memdesc:ga52b927e4f978ddf42faf0acf6de3df57"><td class="mdescLeft"> </td><td class="mdescRight">DMAMUX driver version 2.1.0. <a href="#ga52b927e4f978ddf42faf0acf6de3df57">More...</a><br/></td></tr>
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<tr class="separator:ga52b927e4f978ddf42faf0acf6de3df57"><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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DMAMUX Initialization and de-initialization</h2></td></tr>
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<tr class="memitem:ga850545ac61a004df8ca312db2ca9db73"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00263.html#ga850545ac61a004df8ca312db2ca9db73">DMAMUX_Init</a> (DMAMUX_Type *base)</td></tr>
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<tr class="memdesc:ga850545ac61a004df8ca312db2ca9db73"><td class="mdescLeft"> </td><td class="mdescRight">Initializes the DMAMUX peripheral. <a href="#ga850545ac61a004df8ca312db2ca9db73">More...</a><br/></td></tr>
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<tr class="separator:ga850545ac61a004df8ca312db2ca9db73"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gab663257d094b9b7b6fa1b894fbf8000b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00263.html#gab663257d094b9b7b6fa1b894fbf8000b">DMAMUX_Deinit</a> (DMAMUX_Type *base)</td></tr>
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<tr class="memdesc:gab663257d094b9b7b6fa1b894fbf8000b"><td class="mdescLeft"> </td><td class="mdescRight">Deinitializes the DMAMUX peripheral. <a href="#gab663257d094b9b7b6fa1b894fbf8000b">More...</a><br/></td></tr>
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<tr class="separator:gab663257d094b9b7b6fa1b894fbf8000b"><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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DMAMUX Channel Operation</h2></td></tr>
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<tr class="memitem:gaecac68802d961c31a06389caa97387f5"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00263.html#gaecac68802d961c31a06389caa97387f5">DMAMUX_EnableChannel</a> (DMAMUX_Type *base, uint32_t channel)</td></tr>
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<tr class="memdesc:gaecac68802d961c31a06389caa97387f5"><td class="mdescLeft"> </td><td class="mdescRight">Enables the DMAMUX channel. <a href="#gaecac68802d961c31a06389caa97387f5">More...</a><br/></td></tr>
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<tr class="separator:gaecac68802d961c31a06389caa97387f5"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga4d68cf7796e4a6a9cd0c4289712ca120"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00263.html#ga4d68cf7796e4a6a9cd0c4289712ca120">DMAMUX_DisableChannel</a> (DMAMUX_Type *base, uint32_t channel)</td></tr>
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<tr class="memdesc:ga4d68cf7796e4a6a9cd0c4289712ca120"><td class="mdescLeft"> </td><td class="mdescRight">Disables the DMAMUX channel. <a href="#ga4d68cf7796e4a6a9cd0c4289712ca120">More...</a><br/></td></tr>
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<tr class="separator:ga4d68cf7796e4a6a9cd0c4289712ca120"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gab4cfa329d636dc52dffb7fedef84367e"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00263.html#gab4cfa329d636dc52dffb7fedef84367e">DMAMUX_SetSource</a> (DMAMUX_Type *base, uint32_t channel, int32_t source)</td></tr>
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<tr class="memdesc:gab4cfa329d636dc52dffb7fedef84367e"><td class="mdescLeft"> </td><td class="mdescRight">Configures the DMAMUX channel source. <a href="#gab4cfa329d636dc52dffb7fedef84367e">More...</a><br/></td></tr>
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<tr class="separator:gab4cfa329d636dc52dffb7fedef84367e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga9b873510e45bcc998b5cede12ed359d0"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00263.html#ga9b873510e45bcc998b5cede12ed359d0">DMAMUX_EnablePeriodTrigger</a> (DMAMUX_Type *base, uint32_t channel)</td></tr>
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<tr class="memdesc:ga9b873510e45bcc998b5cede12ed359d0"><td class="mdescLeft"> </td><td class="mdescRight">Enables the DMAMUX period trigger. <a href="#ga9b873510e45bcc998b5cede12ed359d0">More...</a><br/></td></tr>
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<tr class="separator:ga9b873510e45bcc998b5cede12ed359d0"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga7a632ca1a6bd05a936a4f4ba1295e158"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00263.html#ga7a632ca1a6bd05a936a4f4ba1295e158">DMAMUX_DisablePeriodTrigger</a> (DMAMUX_Type *base, uint32_t channel)</td></tr>
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<tr class="memdesc:ga7a632ca1a6bd05a936a4f4ba1295e158"><td class="mdescLeft"> </td><td class="mdescRight">Disables the DMAMUX period trigger. <a href="#ga7a632ca1a6bd05a936a4f4ba1295e158">More...</a><br/></td></tr>
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<tr class="separator:ga7a632ca1a6bd05a936a4f4ba1295e158"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga70912895b0619dcfb911663501cb03f5"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00263.html#ga70912895b0619dcfb911663501cb03f5">DMAMUX_EnableAlwaysOn</a> (DMAMUX_Type *base, uint32_t channel, bool enable)</td></tr>
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<tr class="memdesc:ga70912895b0619dcfb911663501cb03f5"><td class="mdescLeft"> </td><td class="mdescRight">Enables the DMA channel to be always ON. <a href="#ga70912895b0619dcfb911663501cb03f5">More...</a><br/></td></tr>
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<tr class="separator:ga70912895b0619dcfb911663501cb03f5"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<h2 class="groupheader">Macro Definition Documentation</h2>
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<a class="anchor" id="ga52b927e4f978ddf42faf0acf6de3df57"></a>
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<td class="memname">#define FSL_DMAMUX_DRIVER_VERSION   (<a class="el" href="a00260.html#ga812138aa3315b0c6953c1a26130bcc37">MAKE_VERSION</a>(2, 1, 0))</td>
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</tr>
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</table>
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</div><div class="memdoc">
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</div>
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</div>
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<h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="ga850545ac61a004df8ca312db2ca9db73"></a>
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<td class="memname">void DMAMUX_Init </td>
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<td>(</td>
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<td class="paramtype">DMAMUX_Type * </td>
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<td class="paramname"><em>base</em></td><td>)</td>
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<td></td>
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<p>This function ungates the DMAMUX clock.</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>DMAMUX peripheral base address. </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="gab663257d094b9b7b6fa1b894fbf8000b"></a>
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<td class="memname">void DMAMUX_Deinit </td>
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<td>(</td>
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<td class="paramtype">DMAMUX_Type * </td>
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<td class="paramname"><em>base</em></td><td>)</td>
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<td></td>
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</div><div class="memdoc">
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<p>This function gates the DMAMUX clock.</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>DMAMUX peripheral base address. </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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<a class="anchor" id="gaecac68802d961c31a06389caa97387f5"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="mlabels">
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<td class="memname">static void DMAMUX_EnableChannel </td>
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<td>(</td>
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<td class="paramtype">DMAMUX_Type * </td>
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<td class="paramname"><em>base</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>channel</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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</table>
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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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<p>This function enables the DMAMUX channel.</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>DMAMUX peripheral base address. </td></tr>
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<tr><td class="paramname">channel</td><td>DMAMUX channel number. </td></tr>
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</table>
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</dd>
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</dl>
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<td class="memname">static void DMAMUX_DisableChannel </td>
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<td>(</td>
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<td class="paramtype">DMAMUX_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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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>channel</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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</div><div class="memdoc">
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<p>This function disables the DMAMUX channel.</p>
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<dl class="section note"><dt>Note</dt><dd>The user must disable the DMAMUX channel before configuring it. </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">base</td><td>DMAMUX peripheral base address. </td></tr>
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<tr><td class="paramname">channel</td><td>DMAMUX channel number. </td></tr>
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</table>
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</dd>
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</dl>
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<td class="memname">static void DMAMUX_SetSource </td>
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<td>(</td>
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<td class="paramtype">DMAMUX_Type * </td>
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<td class="paramname"><em>base</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>channel</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">int32_t </td>
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<td class="paramname"><em>source</em> </td>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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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>DMAMUX peripheral base address. </td></tr>
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<tr><td class="paramname">channel</td><td>DMAMUX channel number. </td></tr>
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<tr><td class="paramname">source</td><td>Channel source, which is used to trigger the DMA transfer.User need to use the dma_request_source_t type as the input parameter. </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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<a class="anchor" id="ga9b873510e45bcc998b5cede12ed359d0"></a>
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<td class="memname">static void DMAMUX_EnablePeriodTrigger </td>
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<td>(</td>
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<td class="paramtype">DMAMUX_Type * </td>
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<td class="paramname"><em>base</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>channel</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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</table>
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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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</div><div class="memdoc">
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<p>This function enables the DMAMUX period trigger feature.</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>DMAMUX peripheral base address. </td></tr>
|
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<tr><td class="paramname">channel</td><td>DMAMUX channel number. </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="ga7a632ca1a6bd05a936a4f4ba1295e158"></a>
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<div class="memitem">
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<tr>
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<td class="mlabels-left">
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<table class="memname">
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<td class="memname">static void DMAMUX_DisablePeriodTrigger </td>
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<td>(</td>
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<td class="paramtype">DMAMUX_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">uint32_t </td>
|
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<td class="paramname"><em>channel</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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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>This function disables the DMAMUX period trigger.</p>
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<dl class="params"><dt>Parameters</dt><dd>
|
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<table class="params">
|
|
<tr><td class="paramname">base</td><td>DMAMUX peripheral base address. </td></tr>
|
|
<tr><td class="paramname">channel</td><td>DMAMUX channel number. </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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<a class="anchor" id="ga70912895b0619dcfb911663501cb03f5"></a>
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<td class="mlabels-left">
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<table class="memname">
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<td class="memname">static void DMAMUX_EnableAlwaysOn </td>
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<td>(</td>
|
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<td class="paramtype">DMAMUX_Type * </td>
|
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<td class="paramname"><em>base</em>, </td>
|
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</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">uint32_t </td>
|
|
<td class="paramname"><em>channel</em>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">bool </td>
|
|
<td class="paramname"><em>enable</em> </td>
|
|
</tr>
|
|
<tr>
|
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<td></td>
|
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<td>)</td>
|
|
<td></td><td></td>
|
|
</tr>
|
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</table>
|
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</td>
|
|
<td class="mlabels-right">
|
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>This function enables the DMAMUX channel always ON feature.</p>
|
|
<dl class="params"><dt>Parameters</dt><dd>
|
|
<table class="params">
|
|
<tr><td class="paramname">base</td><td>DMAMUX peripheral base address. </td></tr>
|
|
<tr><td class="paramname">channel</td><td>DMAMUX channel number. </td></tr>
|
|
<tr><td class="paramname">enable</td><td>Switcher of the always ON feature. "true" means enabled, "false" means disabled. </td></tr>
|
|
</table>
|
|
</dd>
|
|
</dl>
|
|
|
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</div>
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</div>
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