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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>AVR323 Interfacing GSM modems: AVRGSM_zip.c File Reference</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.3.7 --><div class="qindex"><a class="qindex" href="main.html">Main Page</a> | <a class="qindex" href="annotated.html">Data Structures</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>AVRGSM_FILES/AVRGSM_zip.c File Reference</h1><hr><a name="_details"></a><h2>Detailed Description</h2>Atmel Corporation<p><ul><li>File : AVR_api.c</li><li>Compiler : IAR EWAAVR 4.11a</li></ul><p><ul><li>Support mail : <a href="mailto:avr@atmel.com">avr@atmel.com</a></li></ul><p><ul><li>Supported devices : All devices with a UART/USART can be used. The example is written for ATmega128</li></ul><p><ul><li>AppNote : AVR323 - Interfacing GSM modems</li></ul><p><ul><li>Description : Example of how to use AT-Commands to control a GSM modem</li></ul><p><dl compact><dt><b>Revision</b></dt><dd>1.2 </dd></dl><dl compact><dt><b>Date</b></dt><dd>Wednesday, January 26, 2005 10:43:44 UTC </dd></dl><p>Definition in file <a class="el" href="AVRGSM__zip_8c-source.html">AVRGSM_zip.c</a>.<p><code>#include "<a class="el" href="AVRGSM__zip_8h-source.html">AVRGSM_zip.h</a>"</code><br><p>Include dependency graph for AVRGSM_zip.c:<p><center><img src="AVRGSM__zip_8c__incl.png" border="0" usemap="#AVRGSM_zip.c_map" alt="Include dependency graph"></center><map name="AVRGSM_zip.c_map"><area href="AVRGSM__zip_8h.html" shape="rect" coords="7,7,121,34" alt=""></map><p><a href="AVRGSM__zip_8c-source.html">Go to the source code of this file.</a><table border=0 cellpadding=0 cellspacing=0><tr><td></td></tr><tr><td colspan=2><br><h2>Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="AVRGSM__zip_8c.html#a5">ZIP_atoi</a> (unsigned char *a)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Converting ascii char string to int. <a href="#a5"></a><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="AVRGSM__zip_8c.html#a3">ZIP_compress</a> (unsigned char *in, unsigned char *discarded, unsigned char ret[])</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">ZIP_compress will take a user defined text code it into the PDU format. <a href="#a3"></a><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="AVRGSM__zip_8c.html#a4">ZIP_decompress</a> (unsigned char *compressed, unsigned char *decompressed)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">ZIP_decompress will decode a message in PDU format into a readable string. <a href="#a4"></a><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="AVRGSM__zip_8c.html#a6">ZIP_htoi</a> (unsigned char hex)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Convert hex to int. <a href="#a6"></a><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>void </td><td class="memItemRight" valign=bottom><a class="el" href="AVRGSM__zip_8c.html#a7">ZIP_itoh</a> (int n, unsigned char *ret)</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Converting int [0->255] to hex value. <a href="#a7"></a><br><br></td></tr><tr><td colspan=2><br><h2>Variables</h2></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>const unsigned char __flash </td><td class="memItemRight" valign=bottom><a class="el" href="AVRGSM__zip_8c.html#a0">hex_lookup</a> [] = hex_nmbr</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Lookup table -> int 2 hex. <a href="#a0"></a><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>const unsigned char __flash </td><td class="memItemRight" valign=bottom><a class="el" href="AVRGSM__zip_8c.html#a1">mask</a> [7] = {1,3,7,15,31,63,127}</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Lookup table -> mask. <a href="#a1"></a><br><br></td></tr><tr><td class="memItemLeft" nowrap align=right valign=top>const unsigned char __flash </td><td class="memItemRight" valign=bottom><a class="el" href="AVRGSM__zip_8c.html#a2">power</a> [7] = {128,64,32,16,8,4,2}</td></tr><tr><td class="mdescLeft"> </td><td class="mdescRight">Lookup table -> 2^( 7 - i ). <a href="#a2"></a><br><br></td></tr></table><hr><h2>Function Documentation</h2><a class="anchor" name="a5" doxytag="AVRGSM_zip.c::ZIP_atoi" ></a><p><table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> int ZIP_atoi </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">unsigned char * </td> <td class="mdname1" valign="top" nowrap> <em>a</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>Converting ascii char string to int. <p><dl compact><dt><b>Note:</b></dt><dd>Will return value as int.</dd></dl><dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td></td><td valign=top><em>*a</em> </td><td>ASCII string to be converted. </td></tr> <tr><td></td><td valign=top><em>n</em> </td><td>Return Integer.</td></tr> </table></dl><dl compact><dt><b>Return values:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td></td><td valign=top><em>int</em> </td><td>integer value </td></tr> </table></dl><p>Definition at line <a class="el" href="AVRGSM__zip_8c-source.html#l00140">140</a> of file <a class="el" href="AVRGSM__zip_8c-source.html">AVRGSM_zip.c</a>.<p>Referenced by <a class="el" href="AVRGSM__tools_8c-source.html#l00039">TOOLS_decodeCMTI()</a>.<p><pre class="fragment"><div>00141 {00142 00143 <span class="keywordtype">int</span> i, n; <span class="comment">//Help variables</span>00144 00145 n = 0; <span class="comment">//Init</span>00146 00147 <span class="keywordflow">for</span>( i=0; ( a[ i ] >= <span class="charliteral">'0'</span> ) && ( a[ i ] <= <span class="charliteral">'9'</span> ); ++i ) <span class="comment">//Running through string converting from ascii to integer</span>00148 {00149 n = 10*n + ( a[ i ] - <span class="charliteral">'0'</span> ); <span class="comment">//Adding value to return Integer</span>00150 }00151 00152 <span class="keywordflow">return</span> n;00153 }</div></pre> </td> </tr></table><a class="anchor" name="a3" doxytag="AVRGSM_zip.c::ZIP_compress" ></a><p><table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> int ZIP_compress </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">unsigned char * </td> <td class="mdname" nowrap> <em>in</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td></td> <td class="md" nowrap>unsigned char * </td> <td class="mdname" nowrap> <em>discarded</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td></td> <td class="md" nowrap>unsigned char </td> <td class="mdname" nowrap> <em>ret</em>[]</td> </tr> <tr> <td></td> <td class="md">) </td> <td class="md" colspan="2"></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p>ZIP_compress will take a user defined text code it into the PDU format. <p><dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td></td><td valign=top><em>*in</em> </td><td>Pointer to user defined text </td></tr> <tr><td></td><td valign=top><em>*discarded</em> </td><td>Number of discarded chars, used later to calculate message length </td></tr> <tr><td></td><td valign=top><em>ret[]</em> </td><td>return array for the encoded message</td></tr> </table></dl><dl compact><dt><b>Return values:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td></td><td valign=top><em>i</em> </td><td>Length of read string</td></tr> </table></dl><p>Local variables <p>Definition at line <a class="el" href="AVRGSM__zip_8c-source.html#l00040">40</a> of file <a class="el" href="AVRGSM__zip_8c-source.html">AVRGSM_zip.c</a>.<p>References <a class="el" href="AVRGSM__zip_8c-source.html#l00026">hex_lookup</a>, <a class="el" href="AVRGSM__zip_8c-source.html#l00027">mask</a>, <a class="el" href="AVRGSM__zip_8h-source.html#l00026">MESSAGE_LENGTH</a>, and <a class="el" href="AVRGSM__zip_8c-source.html#l00028">power</a>.<p>Referenced by <a class="el" href="AVRGSM__api_8c-source.html#l00160">API_sendmsg()</a>.<p><pre class="fragment"><div>00041 {00042 00044 <span class="keywordtype">int</span> i,ii,iii;00045 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> encode_c, now_c, next_c;00046 00047 <span class="comment">//Initialization</span>00048 *discarded = 0;00049 00050 <span class="keywordflow">for</span>( i = ii = iii = 0; ( in[i] != <span class="charliteral">'\0'</span> ) && ( i < <a class="code" href="AVRGSM__zip_8h.html#a1">MESSAGE_LENGTH</a> ); ) <span class="comment">//Run through whole string</span>00051 {00052 now_c = in[ i++ ]; <span class="comment">//This char</span>00053 next_c = in[ i ]; <span class="comment">//Next potentially '\0'</span>00054 00055 <span class="comment">//Last char?</span>00056 <span class="keywordflow">if</span>( next_c == <span class="charliteral">'\0'</span> )00057 {00058 next_c = 0;00059 }00060 00061 encode_c = ( now_c >> ii )+ ( <a class="code" href="AVRGSM__zip_8c.html#a1">mask</a>[ ii ] & next_c )*<a class="code" href="AVRGSM__zip_8c.html#a2">power</a>[ ii ];00062 ret[ iii++ ] = <a class="code" href="AVRGSM__zip_8c.html#a0">hex_lookup</a>[ ( encode_c >> 4 ) & 0x0F ]; <span class="comment">//Insert first hex part</span>00063 ret[ iii++ ] = <a class="code" href="AVRGSM__zip_8c.html#a0">hex_lookup</a>[ ( encode_c & 0x0F ) ]; <span class="comment">//Insert last hex part</span>00064 00065 <span class="keywordflow">if</span>( ii == 6 ) <span class="comment">//We have read a chunk of 7 chars, the next one will be discarded</span>00066 {00067 ii = 0;00068 i++;00069 (*discarded)++;00070 }00071 00072 <span class="keywordflow">else</span>00073 {00074 ii++;00075 }00076 }00077 00078 ret[iii] = <span class="charliteral">'\0'</span>;00079 00080 <span class="keywordflow">return</span> i;00081 }</div></pre> </td> </tr></table><a class="anchor" name="a4" doxytag="AVRGSM_zip.c::ZIP_decompress" ></a><p><table class="mdTable" width="100%" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top"> int ZIP_decompress </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">unsigned char * </td> <td class="mdname" nowrap> <em>compressed</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td></td> <td class="md" nowrap>unsigned char * </td> <td class="mdname" nowrap> <em>decompressed</em></td> </tr> <tr> <td></td> <td class="md">) </td> <td class="md" colspan="2"></td> </tr> </table> </td> </tr></table><table cellspacing=5 cellpadding=0 border=0> <tr> <td> </td> <td><p>ZIP_decompress will decode a message in PDU format into a readable string. <p><dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0">⌨️ 快捷键说明
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