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<h1>lis3l02.c</h1><a href="lis3l02_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file lis3l02.c \brief ST LIS3L02 3-axis I2C Accelerometer Library. */</span>
00002 <span class="comment">//*****************************************************************************</span>
00003 <span class="comment">//</span>
00004 <span class="comment">// File Name : 'lis3l02.c'</span>
00005 <span class="comment">// Title : ST LIS3L02 3-axis I2C Accelerometer Library</span>
00006 <span class="comment">// Author : Pascal Stang - Copyright (C) 2004</span>
00007 <span class="comment">// Created : 2004.10.23</span>
00008 <span class="comment">// Revised : 2004.12.14</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>
00020 <span class="comment">//*****************************************************************************</span>
00021
00022 <span class="preprocessor">#include <avr/io.h></span>
00023 <span class="preprocessor">#include <avr/interrupt.h></span>
00024
00025 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>
00026 <span class="preprocessor">#include "<a class="code" href="i2c_8h.html">i2c.h</a>"</span>
00027 <span class="preprocessor">#include "<a class="code" href="lis3l02_8h.html">lis3l02.h</a>"</span>
00028
00029 <span class="preprocessor">#include "<a class="code" href="rprintf_8h.html">rprintf.h</a>"</span>
00030 <span class="preprocessor">#include "<a class="code" href="timer_8h.html">timer.h</a>"</span>
00031
00032 <span class="comment">// global variables</span>
00033
00034 <span class="comment">// Functions</span>
<a name="l00035"></a><a class="code" href="lis3l02_8h.html#a58">00035</a> u08 <a class="code" href="lis3l02_8c.html#a0">lis3l02Init</a>(<span class="keywordtype">void</span>)
00036 {
00037 <span class="comment">// reset LIS3L02 chip</span>
00038 <span class="keywordflow">return</span> <a class="code" href="lis3l02_8c.html#a1">lis3l02Reset</a>();
00039 }
00040
<a name="l00041"></a><a class="code" href="lis3l02_8h.html#a59">00041</a> u08 <a class="code" href="lis3l02_8c.html#a1">lis3l02Reset</a>(<span class="keywordtype">void</span>)
00042 {
00043 <span class="comment">// turn on device and enable X,Y,Z</span>
00044 <a class="code" href="lis3l02_8c.html#a3">lis3l02WriteReg</a>(<a class="code" href="lis3l02_8h.html#a7">LIS3L02_REG_CTRLREG1</a>,
00045 <a class="code" href="lis3l02_8h.html#a22">LIS3L02_CTRLREG1_XEN</a> |
00046 <a class="code" href="lis3l02_8h.html#a23">LIS3L02_CTRLREG1_YEN</a> |
00047 <a class="code" href="lis3l02_8h.html#a24">LIS3L02_CTRLREG1_ZEN</a> |
00048 <a class="code" href="lis3l02_8h.html#a28">LIS3L02_CTRLREG1_PD0</a>);
00049
00050 <span class="comment">// scale and justification options</span>
00051 <a class="code" href="lis3l02_8c.html#a3">lis3l02WriteReg</a>(<a class="code" href="lis3l02_8h.html#a8">LIS3L02_REG_CTRLREG2</a>,
00052 <a class="code" href="lis3l02_8h.html#a34">LIS3L02_CTRLREG2_BOOT</a> |
00053 <a class="code" href="lis3l02_8h.html#a30">LIS3L02_CTRLREG2_DAS</a> );
00054
00055 <span class="keywordflow">return</span> 0;
00056 }
00057
<a name="l00058"></a><a class="code" href="lis3l02_8h.html#a60">00058</a> u08 <a class="code" href="lis3l02_8c.html#a2">lis3l02ReadReg</a>(u08 reg)
00059 {
00060 u08 data;
00061 u08 i2cStat;
00062
00063 <span class="comment">// set register</span>
00064 i2cStat = <a class="code" href="i2c_8c.html#a24">i2cMasterSendNI</a>(<a class="code" href="lis3l02_8h.html#a0">LIS3L02_I2C_ADDR</a>, 1, &reg);
00065 <span class="keywordflow">if</span>(i2cStat == I2C_ERROR_NODEV)
00066 {
00067 rprintf(<span class="stringliteral">"No I2C Device\r\n"</span>);
00068 <span class="keywordflow">return</span> i2cStat;
00069 }
00070 <span class="comment">// read register</span>
00071 i2cStat = <a class="code" href="i2c_8c.html#a25">i2cMasterReceiveNI</a>(<a class="code" href="lis3l02_8h.html#a0">LIS3L02_I2C_ADDR</a>, 1, &data);
00072
00073 <span class="comment">//rprintf("READ: Reg=0x%x Data=0x%x\r\n", reg, data);</span>
00074
00075 <span class="keywordflow">return</span> data;
00076 }
00077
<a name="l00078"></a><a class="code" href="lis3l02_8h.html#a61">00078</a> u08 <a class="code" href="lis3l02_8c.html#a3">lis3l02WriteReg</a>(u08 reg, u08 data)
00079 {
00080 u08 packet[2];
00081 u08 i2cStat;
00082
00083 <span class="comment">// prepare packet</span>
00084 packet[0] = reg;
00085 packet[1] = data;
00086 <span class="comment">// write register</span>
00087 i2cStat = <a class="code" href="i2c_8c.html#a24">i2cMasterSendNI</a>(<a class="code" href="lis3l02_8h.html#a0">LIS3L02_I2C_ADDR</a>, 2, packet);
00088 <span class="keywordflow">if</span>(i2cStat == I2C_ERROR_NODEV)
00089 {
00090 rprintf(<span class="stringliteral">"No I2C Device\r\n"</span>);
00091 <span class="keywordflow">return</span> i2cStat;
00092 }
00093
00094 <span class="comment">//rprintf("WRITE: Reg=0x%x Data=0x%x\r\n", reg, data);</span>
00095
00096 <span class="keywordflow">return</span> (i2cStat == I2C_OK);
00097 }
00098
<a name="l00099"></a><a class="code" href="lis3l02_8h.html#a62">00099</a> s16 <a class="code" href="lis3l02_8c.html#a4">lis3l02GetAccel</a>(u08 chxyz)
00100 {
00101 s16 value;
00102
00103 value = <a class="code" href="lis3l02_8c.html#a2">lis3l02ReadReg</a>(<a class="code" href="lis3l02_8h.html#a13">LIS3L02_REG_OUTXL</a> + (chxyz<<1));
00104 value |= <a class="code" href="lis3l02_8c.html#a2">lis3l02ReadReg</a>(<a class="code" href="lis3l02_8h.html#a14">LIS3L02_REG_OUTXH</a> + (chxyz<<1))<<8;
00105
00106 <span class="keywordflow">return</span> value;
00107 }
00108
00109
00110
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