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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: param.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>param.c</h1><a href="param_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file param.c \brief EEPROM Parameter Storage Library. */</span>00002 <span class="comment">//*****************************************************************************</span>00003 <span class="comment">//</span>00004 <span class="comment">// File Name : 'param.c'</span>00005 <span class="comment">// Title : EEPROM Parameter Storage Library</span>00006 <span class="comment">// Author : Pascal Stang (c)2005</span>00007 <span class="comment">// Created : 9/16/2005</span>00008 <span class="comment">// Revised : 9/20/2005</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">//*****************************************************************************</span>00014 00015 <span class="preprocessor">#include <avr/eeprom.h></span>00016 00017 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>00018 <a name="l00019"></a><a class="code" href="group__param.html#ga1">00019</a> u08 <a class="code" href="group__param.html#ga1">paramLoad</a>(u08* parameters, u08* memaddr, u16 sizebytes)00020 {00021 u16 i;00022 u08 checksum_stored=0;00023 u08 checksum=0;00024 00025 <span class="comment">// load parameters</span>00026 eeprom_read_block(parameters, memaddr, sizebytes);00027 <span class="comment">// load checksum</span>00028 eeprom_read_block(&checksum_stored, memaddr+sizebytes, <span class="keyword">sizeof</span>(u08));00029 00030 <span class="comment">// calculate own checksum</span>00031 <span class="keywordflow">for</span>(i=0;i<sizebytes;i++)00032 checksum += parameters[i];00033 checksum = ~checksum;00034 00035 <span class="keywordflow">if</span>(checksum == checksum_stored)00036 <span class="keywordflow">return</span> TRUE;00037 <span class="keywordflow">else</span>00038 <span class="keywordflow">return</span> FALSE;00039 }00040 <a name="l00041"></a><a class="code" href="group__param.html#ga0">00041</a> <span class="keywordtype">void</span> <a class="code" href="group__param.html#ga0">paramStore</a>(u08* parameters, u08* memaddr, u16 sizebytes)00042 {00043 u16 i;00044 u08 checksum=0;00045 00046 <span class="comment">// calculate checksum</span>00047 <span class="keywordflow">for</span>(i=0;i<sizebytes;i++)00048 checksum += parameters[i];00049 checksum = ~checksum;00050 00051 <span class="comment">// store parameters</span>00052 eeprom_write_block(parameters, memaddr, sizebytes);00053 <span class="comment">// store checksum</span>00054 eeprom_write_block(&checksum, memaddr+sizebytes, <span class="keyword">sizeof</span>(u08));00055 }00056 </pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Oct 24 16:03:55 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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