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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Procyon AVRlib: TI ADS7828 I2C A/D Converter Driver (ads7828.c)</title><link href="dox.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.2 --><div class="qindex"><a class="qindex" href="main.html">Main Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="annotated.html">Data Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Data Fields</a> | <a class="qindex" href="globals.html">Globals</a></div><h1>TI ADS7828 I2C A/D Converter Driver (ads7828.c)<br><small>[<a class="el" href="group__driver__hw.html">Drivers (for external hardware)</a>]</small></h1><hr><a name="_details"></a><h2>Detailed Description</h2><div class="fragment"><pre class="fragment"><span class="preprocessor"> #include "<a class="code" href="ads7828_8h.html">ads7828.h</a>"</span> </pre></div> <dl compact><dt><b>Overview</b></dt><dd>This library provides high-level functions for accessing the Texas Instruments ADS7828 I2C A/D Converter.</dd></dl>The basic specs of the ADS7828 are:<ul><li>12-bit results</li><li>8 input channels</li><li>up to 50KHz conversion rate</li><li>External reference or internal 2.5V reference </li></ul><p><table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr><tr><td colspan="2"><br><h2>Defines</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga5" doxytag="ads7828::ADS7828_I2C_ADDR"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_I2C_ADDR</b> 0x90</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga6" doxytag="ads7828::ADS7828_CMD_PD0"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_PD0</b> 0x04</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga7" doxytag="ads7828::ADS7828_CMD_PD1"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_PD1</b> 0x08</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga8" doxytag="ads7828::ADS7828_CMD_C0"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_C0</b> 0x10</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga9" doxytag="ads7828::ADS7828_CMD_C1"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_C1</b> 0x20</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga10" doxytag="ads7828::ADS7828_CMD_C2"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_C2</b> 0x40</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga11" doxytag="ads7828::ADS7828_CMD_SD"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_SD</b> 0x80</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga12" doxytag="ads7828::ADS7828_CMD_CH0"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_CH0</b> 0x00</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga13" doxytag="ads7828::ADS7828_CMD_CH1"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_CH1</b> 0x04</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga14" doxytag="ads7828::ADS7828_CMD_CH2"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_CH2</b> 0x01</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga15" doxytag="ads7828::ADS7828_CMD_CH3"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_CH3</b> 0x05</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga16" doxytag="ads7828::ADS7828_CMD_CH4"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_CH4</b> 0x02</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga17" doxytag="ads7828::ADS7828_CMD_CH5"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_CH5</b> 0x06</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga18" doxytag="ads7828::ADS7828_CMD_CH6"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_CH6</b> 0x03</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga19" doxytag="ads7828::ADS7828_CMD_CH7"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_CH7</b> 0x07</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga20" doxytag="ads7828::ADS7828_CMD_PDMODE0"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_PDMODE0</b> 0x00</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga21" doxytag="ads7828::ADS7828_CMD_PDMODE1"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_PDMODE1</b> 0x04</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga22" doxytag="ads7828::ADS7828_CMD_PDMODE2"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_PDMODE2</b> 0x08</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga23" doxytag="ads7828::ADS7828_CMD_PDMODE3"></a>#define </td><td class="memItemRight" valign="bottom"><b>ADS7828_CMD_PDMODE3</b> 0x0C</td></tr><tr><td colspan="2"><br><h2>Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">u08 </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ads7828.html#ga0">ads7828Init</a> (u08 i2cAddr)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ads7828.html#ga1">ads7828SetReference</a> (u08 ref)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga2" doxytag="ads7828::ads7828Convert"></a>u16 </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ads7828.html#ga2">ads7828Convert</a> (u08 i2cAddr, u08 channel)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Begin single-ended conversion on given logical channel#, and return result. <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga3" doxytag="ads7828::ads7828ConvertDiff"></a>u16 </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ads7828.html#ga3">ads7828ConvertDiff</a> (u08 i2cAddr, u08 channel)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Begin differential conversion on given channel pair, and return result. <br></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga4" doxytag="ads7828::ads7828ConvertRaw"></a>u16 </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ads7828.html#ga4">ads7828ConvertRaw</a> (u08 i2cAddr, u08 channel)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Begin conversion on given raw channel#, and return result. <br></td></tr></table><hr><h2>Function Documentation</h2><a class="anchor" name="ga0" doxytag="ads7828.h::ads7828Init"></a><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">u08 ads7828Init </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">u08 </td> <td class="mdname1" valign="top" nowrap> <em>i2cAddr</em> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Initialize the ADS7828 chip. Returns: TRUE if successful, FALSE if unsuccessful (chip not present). <p>Definition at line <a class="el" href="ads7828_8c-source.html#l00034">34</a> of file <a class="el" href="ads7828_8c-source.html">ads7828.c</a>. </td> </tr></table><a class="anchor" name="ga1" doxytag="ads7828.h::ads7828SetReference"></a><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">void ads7828SetReference </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">u08 </td> <td class="mdname1" valign="top" nowrap> <em>ref</em> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Set the voltage reference to use for A/D conversion.<ul><li>ref = 0 => External reference voltage on Ref pin.</li><li>ref = 1 => Internal 2.5V reference voltage (Ref pin left open). </li></ul><p>Definition at line <a class="el" href="ads7828_8c-source.html#l00081">81</a> of file <a class="el" href="ads7828_8c-source.html">ads7828.c</a>. </td> </tr></table><hr size="1"><address style="align: right;"><small>Generated on Mon Aug 22 04:29:29 2005 for Procyon AVRlib by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address></body></html>⌨️ 快捷键说明
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