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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: i2ceeprom.c 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 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> | <a class="qindex" href="pages.html">Related Pages</a></div><h1>i2ceeprom.c</h1><a href="i2ceeprom_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file i2ceeprom.c \brief Interface for standard I2C EEPROM memories. */</span>00002 <span class="comment">//*****************************************************************************</span>00003 <span class="comment">//</span>00004 <span class="comment">// File Name : 'i2ceeprom.c'</span>00005 <span class="comment">// Title : Interface for standard I2C EEPROM memories</span>00006 <span class="comment">// Author : Pascal Stang - Copyright (C) 2003</span>00007 <span class="comment">// Created : 2003.04.23</span>00008 <span class="comment">// Revised : 2003.04.23</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">// This code is distributed under the GNU Public License</span>00014 <span class="comment">// which can be found at http://www.gnu.org/licenses/gpl.txt</span>00015 <span class="comment">//</span>00016 <span class="comment">//*****************************************************************************</span>00017 00018 <span class="preprocessor">#include <avr/io.h></span>00019 <span class="preprocessor">#include <avr/interrupt.h></span>00020 00021 <span class="preprocessor">#include "<a class="code" href="i2c_8h.html">i2c.h</a>"</span>00022 <span class="preprocessor">#include "<a class="code" href="i2ceeprom_8h.html">i2ceeprom.h</a>"</span>00023 00024 <span class="comment">// Standard I2C bit rates are:</span>00025 <span class="comment">// 100KHz for slow speed</span>00026 <span class="comment">// 400KHz for high speed</span>00027 00028 <span class="comment">// functions</span><a name="l00029"></a><a class="code" href="i2ceeprom_8h.html#a0">00029</a> <span class="keywordtype">void</span> <a class="code" href="i2ceeprom_8c.html#a0">i2ceepromInit</a>(<span class="keywordtype">void</span>)00030 {00031 <span class="comment">// although there is no code here</span>00032 <span class="comment">// don't forget to initialize the I2C interface itself</span>00033 }00034 <a name="l00035"></a><a class="code" href="i2ceeprom_8h.html#a1">00035</a> u08 <a class="code" href="i2ceeprom_8c.html#a1">i2ceepromReadByte</a>(u08 i2cAddr, u32 memAddr)00036 {00037 u08 packet[2];00038 <span class="comment">// prepare address</span>00039 packet[0] = (memAddr>>8);00040 packet[1] = (memAddr&0x00FF);00041 <span class="comment">// send memory address we wish to access to the memory chip</span>00042 <a class="code" href="i2c_8c.html#a24">i2cMasterSendNI</a>(i2cAddr, 2, packet);00043 <span class="comment">// retrieve the data at this memory address</span>00044 <a class="code" href="i2c_8c.html#a25">i2cMasterReceiveNI</a>(i2cAddr, 1, packet);00045 <span class="comment">// return data</span>00046 <span class="keywordflow">return</span> packet[0];00047 }00048 <a name="l00049"></a><a class="code" href="i2ceeprom_8h.html#a2">00049</a> <span class="keywordtype">void</span> <a class="code" href="i2ceeprom_8c.html#a2">i2ceepromWriteByte</a>(u08 i2cAddr, u32 memAddr, u08 data)00050 {00051 u08 packet[3];00052 <span class="comment">// prepare address + data</span>00053 packet[0] = (memAddr>>8);00054 packet[1] = (memAddr&0x00FF);00055 packet[2] = data;00056 <span class="comment">// send memory address we wish to access to the memory chip</span>00057 <span class="comment">// along with the data we wish to write</span>00058 <a class="code" href="i2c_8c.html#a24">i2cMasterSendNI</a>(i2cAddr, 3, packet);00059 }</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 29 03:41:07 2006 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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