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<div id="projectbrief">This document shows Ameba SDK 3.5 APIs</div>
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<div class="title">GPIO<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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<p>gpio functions
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="member-group"></a>
Ameba Common</h2></td></tr>
<tr class="memitem:ga80305b9e955f6ce5e555096932e76d8c"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__gpio.html#ga80305b9e955f6ce5e555096932e76d8c">gpio_init</a> (gpio_t *obj, PinName pin)</td></tr>
<tr class="memdesc:ga80305b9e955f6ce5e555096932e76d8c"><td class="mdescLeft"> </td><td class="mdescRight">Initializes the GPIO device, include mode/direction/pull control registers. <a href="#ga80305b9e955f6ce5e555096932e76d8c">More...</a><br /></td></tr>
<tr class="separator:ga80305b9e955f6ce5e555096932e76d8c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gae7303f79f43bab40cf7fdb0e7f596d5b"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group__gpio.html#gae7303f79f43bab40cf7fdb0e7f596d5b">gpio_set</a> (PinName pin)</td></tr>
<tr class="memdesc:gae7303f79f43bab40cf7fdb0e7f596d5b"><td class="mdescLeft"> </td><td class="mdescRight">Set the given pin as GPIO. <a href="#gae7303f79f43bab40cf7fdb0e7f596d5b">More...</a><br /></td></tr>
<tr class="separator:gae7303f79f43bab40cf7fdb0e7f596d5b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga980b8f8055986ffc177267488a4bd19d"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__gpio.html#ga980b8f8055986ffc177267488a4bd19d">gpio_mode</a> (gpio_t *obj, PinMode mode)</td></tr>
<tr class="memdesc:ga980b8f8055986ffc177267488a4bd19d"><td class="mdescLeft"> </td><td class="mdescRight">Set GPIO mode. <a href="#ga980b8f8055986ffc177267488a4bd19d">More...</a><br /></td></tr>
<tr class="separator:ga980b8f8055986ffc177267488a4bd19d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga5a6594d03628bb652d45bdd5bf266348"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__gpio.html#ga5a6594d03628bb652d45bdd5bf266348">gpio_dir</a> (gpio_t *obj, PinDirection direction)</td></tr>
<tr class="memdesc:ga5a6594d03628bb652d45bdd5bf266348"><td class="mdescLeft"> </td><td class="mdescRight">Set GPIO direction. <a href="#ga5a6594d03628bb652d45bdd5bf266348">More...</a><br /></td></tr>
<tr class="separator:ga5a6594d03628bb652d45bdd5bf266348"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaedd478762e37aeafcf9ade8e255718b0"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__gpio.html#gaedd478762e37aeafcf9ade8e255718b0">gpio_write</a> (gpio_t *obj, int value)</td></tr>
<tr class="memdesc:gaedd478762e37aeafcf9ade8e255718b0"><td class="mdescLeft"> </td><td class="mdescRight">Sets value to the selected output port pin. <a href="#gaedd478762e37aeafcf9ade8e255718b0">More...</a><br /></td></tr>
<tr class="separator:gaedd478762e37aeafcf9ade8e255718b0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gabb97298a1eb6f6c11b6290abe7a1823b"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__gpio.html#gabb97298a1eb6f6c11b6290abe7a1823b">gpio_read</a> (gpio_t *obj)</td></tr>
<tr class="memdesc:gabb97298a1eb6f6c11b6290abe7a1823b"><td class="mdescLeft"> </td><td class="mdescRight">Reads the specified gpio port pin. <a href="#gabb97298a1eb6f6c11b6290abe7a1823b">More...</a><br /></td></tr>
<tr class="separator:gabb97298a1eb6f6c11b6290abe7a1823b"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>gpio functions </p>
<h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="ga5a6594d03628bb652d45bdd5bf266348"></a>
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<td class="memname">void gpio_dir </td>
<td>(</td>
<td class="paramtype">gpio_t * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">PinDirection </td>
<td class="paramname"><em>direction</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Set GPIO direction. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>gpio object define in application software. </td></tr>
<tr><td class="paramname">direction</td><td>this parameter can be one of the following values: <ul>
<li>PIN_INPUT: this pin is input </li>
<li>PIN_OUTPUT: this pin is output </li>
</ul>
</td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">none</td><td></td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga80305b9e955f6ce5e555096932e76d8c"></a>
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<div class="memproto">
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<td class="memname">void gpio_init </td>
<td>(</td>
<td class="paramtype">gpio_t * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">PinName </td>
<td class="paramname"><em>pin</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Initializes the GPIO device, include mode/direction/pull control registers. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>gpio object define in application software. </td></tr>
<tr><td class="paramname">pin</td><td>PinName according to pinmux spec. </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">none</td><td></td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga980b8f8055986ffc177267488a4bd19d"></a>
<div class="memitem">
<div class="memproto">
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<td class="memname">void gpio_mode </td>
<td>(</td>
<td class="paramtype">gpio_t * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">PinMode </td>
<td class="paramname"><em>mode</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Set GPIO mode. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>gpio object define in application software. </td></tr>
<tr><td class="paramname">mode</td><td>this parameter can be one of the following values: <ul>
<li>PullNone: HighZ, user can input high or low use this pin </li>
<li>OpenDrain(is OpenDrain output): no pull + OUT + GPIO[gpio_bit] = 0 </li>
<li>PullDown: pull down </li>
<li>PullUp: pull up </li>
</ul>
</td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">none</td><td></td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="gabb97298a1eb6f6c11b6290abe7a1823b"></a>
<div class="memitem">
<div class="memproto">
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<td class="memname">int gpio_read </td>
<td>(</td>
<td class="paramtype">gpio_t * </td>
<td class="paramname"><em>obj</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Reads the specified gpio port pin. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>gpio object define in application software. </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">1</td><td>pin state is high </td></tr>
<tr><td class="paramname">0</td><td>pin state is low </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="gae7303f79f43bab40cf7fdb0e7f596d5b"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">uint32_t gpio_set </td>
<td>(</td>
<td class="paramtype">PinName </td>
<td class="paramname"><em>pin</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Set the given pin as GPIO. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pin</td><td>PinName according to pinmux spec. </td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname"></td><td>The given pin with GPIO function </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="gaedd478762e37aeafcf9ade8e255718b0"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void gpio_write </td>
<td>(</td>
<td class="paramtype">gpio_t * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>value</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Sets value to the selected output port pin. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>gpio object define in application software. </td></tr>
<tr><td class="paramname">value</td><td>specifies the value to be written to the selected pin This parameter can be one of the following values: <ul>
<li>0: Pin state set to low </li>
<li>1: Pin state set to high </li>
</ul>
</td></tr>
</table>
</dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">none</td><td></td></tr>
</table>
</dd>
</dl>
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