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<div id="projectname">SDK4.0
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<div id="projectbrief">This document shows Ameba SDK 4.0 APIs</div>
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<div class="header">
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<div class="title">ANALOG_OUT<div class="ingroups"><a class="el" href="group__sdk.html">Ameba SDK</a> » <a class="el" href="group__hal.html">HAL</a></div></div> </div>
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</div><!--header-->
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<div class="contents">
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<p>analog_out functions
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<a href="#details">More...</a></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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Ameba1 Only</h2></td></tr>
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<tr class="memitem:ga125c25ad6ab46870e3c0a3310cae2a2e"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga125c25ad6ab46870e3c0a3310cae2a2e"></a>
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typedef struct dac_s </td><td class="memItemRight" valign="bottom"><b>dac_t</b></td></tr>
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<tr class="separator:ga125c25ad6ab46870e3c0a3310cae2a2e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga03af2eab754bf06b4a38b8ad180fb07e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__analog__out.html#ga03af2eab754bf06b4a38b8ad180fb07e">analogout_init</a> (dac_t *obj, PinName pin)</td></tr>
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<tr class="memdesc:ga03af2eab754bf06b4a38b8ad180fb07e"><td class="mdescLeft"> </td><td class="mdescRight">Initialize DAC. <a href="#ga03af2eab754bf06b4a38b8ad180fb07e">More...</a><br /></td></tr>
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<tr class="separator:ga03af2eab754bf06b4a38b8ad180fb07e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga7b24b593e30c6faf73652906bd23005f"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__analog__out.html#ga7b24b593e30c6faf73652906bd23005f">analogout_free</a> (dac_t *obj)</td></tr>
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<tr class="memdesc:ga7b24b593e30c6faf73652906bd23005f"><td class="mdescLeft"> </td><td class="mdescRight">Free DAC. <a href="#ga7b24b593e30c6faf73652906bd23005f">More...</a><br /></td></tr>
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<tr class="separator:ga7b24b593e30c6faf73652906bd23005f"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga01920ea7cfe3b59980600977e8454f10"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__analog__out.html#ga01920ea7cfe3b59980600977e8454f10">analogout_write</a> (dac_t *obj, float value)</td></tr>
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<tr class="memdesc:ga01920ea7cfe3b59980600977e8454f10"><td class="mdescLeft"> </td><td class="mdescRight">Execute analog output obj: dac object define in application software. value: analog ratio value, should be transfered to register value. <a href="#ga01920ea7cfe3b59980600977e8454f10">More...</a><br /></td></tr>
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<tr class="separator:ga01920ea7cfe3b59980600977e8454f10"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga62b4e5baeb451bf9e110c22231a5921e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__analog__out.html#ga62b4e5baeb451bf9e110c22231a5921e">analogout_write_u16</a> (dac_t *obj, uint16_t value)</td></tr>
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<tr class="memdesc:ga62b4e5baeb451bf9e110c22231a5921e"><td class="mdescLeft"> </td><td class="mdescRight">Execute analog output 16bit obj: dac object define in application software. value: analog ratio value, should be transfered to register value. <a href="#ga62b4e5baeb451bf9e110c22231a5921e">More...</a><br /></td></tr>
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<tr class="separator:ga62b4e5baeb451bf9e110c22231a5921e"><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>analog_out functions </p>
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<h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="ga7b24b593e30c6faf73652906bd23005f"></a>
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<td class="memname">void analogout_free </td>
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<td>(</td>
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<td class="paramtype">dac_t * </td>
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<td class="paramname"><em>obj</em></td><td>)</td>
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<td></td>
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<p>Free DAC. </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">obj</td><td>dac object define in application software. </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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<td class="memname">void analogout_init </td>
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<td>(</td>
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<td class="paramtype">dac_t * </td>
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<td class="paramname"><em>obj</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">PinName </td>
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<td class="paramname"><em>pin</em> </td>
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<tr>
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<td></td>
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</table>
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</div><div class="memdoc">
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<p>Initialize DAC. </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">obj</td><td>dac object define in application software. </td></tr>
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<tr><td class="paramname">pin</td><td>dac PinName according to pinmux spec. </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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<td class="memname">void analogout_write </td>
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<td>(</td>
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<td class="paramtype">dac_t * </td>
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<td class="paramname"><em>obj</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">float </td>
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<td class="paramname"><em>value</em> </td>
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<tr>
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<td></td>
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<td>)</td>
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<p>Execute analog output obj: dac object define in application software. value: analog ratio value, should be transfered to register value. </p>
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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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<dl class="section note"><dt>Note</dt><dd>This function is mainly to execute analog output and the value is a ratio. The upper/lower bound of DAC register input value is defined by DAC_XXXXX_FULL_SCALE. The parameter "value" of this function should be transfered to register value. </dd></dl>
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<td class="memname">void analogout_write_u16 </td>
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<td>(</td>
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<td class="paramtype">dac_t * </td>
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<td class="paramname"><em>obj</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">uint16_t </td>
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<td class="paramname"><em>value</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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<p>Execute analog output 16bit obj: dac object define in application software. value: analog ratio value, should be transfered to register value. </p>
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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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</dl>
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<dl class="section note"><dt>Note</dt><dd>The register value of DAC input is a format of 2's complement. The most maximum value of positive value drives DAC to output a voltage about 3.3V. The most mimimum value of negative value drives DAC to output a voltage about 0. And the middle value of 0x000 will drive DAC to output a voltage of half of max voltage. </dd></dl>
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</div><!-- contents -->
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