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| 3 | <title>Procyon AVRlib: i2ceeprom.c Source File</title> |
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| 8 | <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> |
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| 9 | 00002 <span class="comment">//*****************************************************************************</span> |
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| 10 | 00003 <span class="comment">//</span> |
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| 11 | 00004 <span class="comment">// File Name : 'i2ceeprom.c'</span> |
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| 12 | 00005 <span class="comment">// Title : Interface for standard I2C EEPROM memories</span> |
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| 13 | 00006 <span class="comment">// Author : Pascal Stang - Copyright (C) 2003</span> |
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| 14 | 00007 <span class="comment">// Created : 2003.04.23</span> |
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| 15 | 00008 <span class="comment">// Revised : 2003.04.23</span> |
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| 16 | 00009 <span class="comment">// Version : 0.1</span> |
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| 17 | 00010 <span class="comment">// Target MCU : Atmel AVR series</span> |
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| 18 | 00011 <span class="comment">// Editor Tabs : 4</span> |
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| 19 | 00012 <span class="comment">//</span> |
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| 20 | 00013 <span class="comment">// This code is distributed under the GNU Public License</span> |
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| 21 | 00014 <span class="comment">// which can be found at http://www.gnu.org/licenses/gpl.txt</span> |
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| 22 | 00015 <span class="comment">//</span> |
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| 23 | 00016 <span class="comment">//*****************************************************************************</span> |
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| 24 | 00017 |
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| 25 | 00018 <span class="preprocessor">#include <avr/io.h></span> |
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| 26 | 00019 <span class="preprocessor">#include <avr/interrupt.h></span> |
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| 27 | 00020 |
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| 28 | 00021 <span class="preprocessor">#include "<a class="code" href="i2c_8h.html">i2c.h</a>"</span> |
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| 29 | 00022 <span class="preprocessor">#include "<a class="code" href="i2ceeprom_8h.html">i2ceeprom.h</a>"</span> |
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| 30 | 00023 |
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| 31 | 00024 <span class="comment">// Standard I2C bit rates are:</span> |
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| 32 | 00025 <span class="comment">// 100KHz for slow speed</span> |
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| 33 | 00026 <span class="comment">// 400KHz for high speed</span> |
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| 34 | 00027 |
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| 35 | 00028 <span class="comment">// functions</span> |
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| 36 | <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>) |
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| 37 | 00030 { |
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| 38 | 00031 <span class="comment">// although there is no code here</span> |
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| 39 | 00032 <span class="comment">// don't forget to initialize the I2C interface itself</span> |
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| 40 | 00033 } |
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| 41 | 00034 |
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| 42 | <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) |
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| 43 | 00036 { |
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| 44 | 00037 u08 packet[2]; |
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| 45 | 00038 <span class="comment">// prepare address</span> |
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| 46 | 00039 packet[0] = (memAddr>>8); |
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| 47 | 00040 packet[1] = (memAddr&0x00FF); |
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| 48 | 00041 <span class="comment">// send memory address we wish to access to the memory chip</span> |
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| 49 | 00042 <a class="code" href="i2c_8c.html#a24">i2cMasterSendNI</a>(i2cAddr, 2, packet); |
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| 50 | 00043 <span class="comment">// retrieve the data at this memory address</span> |
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| 51 | 00044 <a class="code" href="i2c_8c.html#a25">i2cMasterReceiveNI</a>(i2cAddr, 1, packet); |
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| 52 | 00045 <span class="comment">// return data</span> |
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| 53 | 00046 <span class="keywordflow">return</span> packet[0]; |
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| 54 | 00047 } |
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| 55 | 00048 |
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| 56 | <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) |
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| 57 | 00050 { |
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| 58 | 00051 u08 packet[3]; |
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| 59 | 00052 <span class="comment">// prepare address + data</span> |
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| 60 | 00053 packet[0] = (memAddr>>8); |
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| 61 | 00054 packet[1] = (memAddr&0x00FF); |
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| 62 | 00055 packet[2] = data; |
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| 63 | 00056 <span class="comment">// send memory address we wish to access to the memory chip</span> |
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| 64 | 00057 <span class="comment">// along with the data we wish to write</span> |
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| 65 | 00058 <a class="code" href="i2c_8c.html#a24">i2cMasterSendNI</a>(i2cAddr, 3, packet); |
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| 66 | 00059 } |
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| 67 | </pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 29 03:41:07 2006 for Procyon AVRlib by |
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| 68 | <a href="http://www.doxygen.org/index.html"> |
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| 69 | <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address> |
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| 70 | </body> |
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