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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: ads7870.h Source File</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&nbsp;Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="annotated.html">Data&nbsp;Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="functions.html">Data&nbsp;Fields</a> | <a class="qindex" href="globals.html">Globals</a> | <a class="qindex" href="pages.html">Related&nbsp;Pages</a></div><h1>ads7870.h</h1><a href="ads7870_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file ads7870.h \brief TI ADS7870 12-bit 8ch A/D Converter Driver Library. */</span>00002 <span class="comment">//*****************************************************************************</span>00003 <span class="comment">//</span>00004 <span class="comment">// File Name    : 'ads7870.h'</span>00005 <span class="comment">// Title        : TI ADS7870 12-bit 8ch A/D Converter Driver Library</span>00006 <span class="comment">// Author       : Pascal Stang - Copyright (C) 2005</span>00007 <span class="comment">// Created      : 2005.07.19</span>00008 <span class="comment">// Revised      : 2005.07.21</span>00009 <span class="comment">// Version      : 0.1</span>00010 <span class="comment">// Target MCU   : Atmel AVR Series</span>00011 <span class="comment">// Editor Tabs  : 4</span>00012 <span class="comment">//</span>00013 <span class="comment">// NOTE: This code is currently below version 1.0, and therefore is considered</span>00014 <span class="comment">// to be lacking in some functionality or documentation, or may not be fully</span>00015 <span class="comment">// tested.  Nonetheless, you can expect most functions to work.</span>00016 <span class="comment">//</span>00017 <span class="comment">// This code is distributed under the GNU Public License</span>00018 <span class="comment">//      which can be found at http://www.gnu.org/licenses/gpl.txt</span>00019 <span class="comment">//</span><span class="comment"></span>00020 <span class="comment">/// \ingroup driver_hw</span>00021 <span class="comment">/// \defgroup ads7870 TI ADS7870 SPI A/D Converter Driver (ads7870.c)</span>00022 <span class="comment">/// \code #include "ads7870.h" \endcode</span>00023 <span class="comment">/// \par Overview</span>00024 <span class="comment">///     This library provides high-level functions for accessing the Texas</span>00025 <span class="comment">///     Instruments ADS7870 I2C A/D Converter.</span>00026 <span class="comment">///</span>00027 <span class="comment">///     The basic specs of the ADS7870 are:</span>00028 <span class="comment">///     - Fast SPI interface (up to 20MHz)</span>00029 <span class="comment">///     - 12-bit results</span>00030 <span class="comment">///     - 8 single-ended or 4 differential input channels</span>00031 <span class="comment">///     - Programmable gain stage (1,2,4,5,8,10,16,20x gains)</span>00032 <span class="comment">///     - Software or hardware triggered conversion</span>00033 <span class="comment">///     - 4-bit auxiliary digital I/O lines (controlled via serial interface)</span>00034 <span class="comment">///     - Up to 50KHz conversion rate</span>00035 <span class="comment">///     - External reference or internal 2.5V, 2.048V, 1.15V reference</span>00036 <span class="comment">///     - NOTE: use pin-compatible ADS7871 for 14-bit results</span>00037 <span class="comment"></span><span class="comment">//</span>00038 <span class="comment">//*****************************************************************************</span><span class="comment"></span>00039 <span class="comment">//@{</span>00040 <span class="comment"></span>00041 <span class="preprocessor">#ifndef ADS7870_H</span>00042 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_H</span>00043 <span class="preprocessor"></span>00044 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>00045 00046 <span class="comment">// constants/macros/typdefs</span>00047 <span class="preprocessor">#define ADS7870_CS_PORT         PORTB</span>00048 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CS_DDR          DDRB</span>00049 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CS_PIN          PB0</span>00050 <span class="preprocessor"></span>00051 <span class="comment">// instruction bit defines</span>00052 <span class="preprocessor">#define ADS7870_CONVERT         0x80</span>00053 <span class="preprocessor"></span>00054 <span class="preprocessor">#define ADS7870_REG_READ        0x40</span>00055 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_REG_WRITE       0x00</span>00056 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_REG_16BIT       0x20</span>00057 <span class="preprocessor"></span>00058 <span class="comment">// register addresses</span>00059 <span class="preprocessor">#define ADS7870_RESULTLO        0x00</span>00060 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_RESULTHI        0x01</span>00061 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_PGAVALID        0x02</span>00062 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_ADCTRL          0x03</span>00063 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_GAINMUX         0x04</span>00064 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_DIGIOSTATE      0x05</span>00065 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_DIGIOCTRL       0x06</span>00066 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_REFOSC          0x07</span>00067 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_SERIFCTRL       0x18</span>00068 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_ID              0x1F</span>00069 <span class="preprocessor"></span>00070 <span class="comment">// register bit defines</span>00071 <span class="preprocessor">#define ADS7870_RESULTLO_OVR    0x01</span>00072 <span class="preprocessor"></span>00073 <span class="preprocessor">#define ADS7870_ADCTRL_BIN      0x20</span>00074 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_ADCTRL_RMB1     0x08</span>00075 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_ADCTRL_RMB0     0x04</span>00076 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_ADCTRL_CFD1     0x02</span>00077 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_ADCTRL_CFD0     0x01</span>00078 <span class="preprocessor"></span>00079 <span class="preprocessor">#define ADS7870_GAINMUX_CNVBSY  0x80</span>00080 <span class="preprocessor"></span>00081 <span class="preprocessor">#define ADS7870_REFOSC_OSCR     0x20</span>00082 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_REFOSC_OSCE     0x10</span>00083 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_REFOSC_REFE     0x08</span>00084 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_REFOSC_BUFE     0x04</span>00085 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_REFOSC_R2V      0x02</span>00086 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_REFOSC_RBG      0x01</span>00087 <span class="preprocessor"></span>00088 <span class="preprocessor">#define ADS7870_SERIFCTRL_LSB   0x01</span>00089 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_SERIFCTRL_2W3W  0x02</span>00090 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_SERIFCTRL_8051  0x04</span>00091 <span class="preprocessor"></span>00092 <span class="preprocessor">#define ADS7870_ID_VALUE        0x01</span>00093 <span class="preprocessor"></span>00094 <span class="comment">// gain defines</span>00095 <span class="preprocessor">#define ADS7870_GAIN_1X         0x00</span>00096 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_GAIN_2X         0x10</span>00097 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_GAIN_4X         0x20</span>00098 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_GAIN_5X         0x30</span>00099 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_GAIN_8X         0x40</span>00100 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_GAIN_10X        0x50</span>00101 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_GAIN_16X        0x60</span>00102 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_GAIN_20X        0x70</span>00103 <span class="preprocessor"></span><span class="comment">// channel defines</span>00104 <span class="preprocessor">#define ADS7870_CH_0_1_DIFF     0x00</span>00105 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_2_3_DIFF     0x01</span>00106 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_4_5_DIFF     0x02</span>00107 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_6_7_DIFF     0x03</span>00108 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_1_0_DIFF     0x04</span>00109 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_3_2_DIFF     0x05</span>00110 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_5_4_DIFF     0x06</span>00111 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_7_6_DIFF     0x07</span>00112 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_SINGLE_ENDED 0x08</span>00113 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_0            0x08</span>00114 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_1            0x09</span>00115 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_2            0x0A</span>00116 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_3            0x0B</span>00117 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_4            0x0C</span>00118 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_5            0x0D</span>00119 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_6            0x0E</span>00120 <span class="preprocessor"></span><span class="preprocessor">#define ADS7870_CH_7            0x0F</span>00121 <span class="preprocessor"></span>00122 <span class="comment">// functions</span>00123 <span class="comment"></span>00124 <span class="comment">//! Initialize the ADS7870 chip.</span>00125 <span class="comment">/// Returns:</span>00126 <span class="comment">/// TRUE if successful, </span>00127 <span class="comment">/// FALSE if unsuccessful (chip not responding).</span>00128 <span class="comment"></span>u08 <a class="code" href="group__ads7870.html#ga0">ads7870Init</a>(<span class="keywordtype">void</span>);00129 <span class="comment"></span>00130 <span class="comment">//! Begin single-ended conversion on given logical channel#0-7, and return result.</span>00131 <span class="comment">/// \note Result is returned left-justified.</span>00132 <span class="comment"></span>s16 <a class="code" href="group__ads7870.html#ga1">ads7870Convert</a>(u08 channel);00133 <span class="comment"></span>00134 <span class="comment">//! Begin differential conversion on given channel pair, and return result.</span>00135 <span class="comment">/// \note Result is returned left-justified.</span>00136 <span class="comment"></span>s16 <a class="code" href="group__ads7870.html#ga2">ads7870ConvertDiff</a>(u08 channel);00137 <span class="comment"></span>00138 <span class="comment">//! Begin conversion on given raw channel#, and return result.</span>00139 <span class="comment">/// \note Result is returned left-justified.</span>00140 <span class="comment"></span>s16 <a class="code" href="group__ads7870.html#ga3">ads7870ConvertRaw</a>(u08 channel);00141 <span class="comment"></span>00142 <span class="comment">//! Read value from ADS7870 register.</span>00143 <span class="comment">///</span>00144 <span class="comment"></span>u08 <a class="code" href="group__ads7870.html#ga4">ads7870ReadReg</a>(u08 reg);00145 <span class="comment"></span>00146 <span class="comment">//! Write value into ADS7870 register.</span>00147 <span class="comment">///</span>00148 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="group__ads7870.html#ga5">ads7870WriteReg</a>(u08 reg, u08 value);00149 00150 00151 00152 <span class="preprocessor">#endif</span>00153 <span class="preprocessor"></span><span class="comment">//@}</span></span></pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 29 03:41:06 2006 for Procyon AVRlib by&nbsp;<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>
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