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198 lines
7.3 KiB
HTML
198 lines
7.3 KiB
HTML
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<a class="urllink" href="http://www.arduino.cc/blog/" rel="nofollow">Blog »</a><a class="urllink" href="http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl" rel="nofollow">Forum »</a><a class="urllink" href="http://www.arduino.cc/playground/" rel="nofollow">Playground »</a>
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<p><strong>Reference</strong> <a class='wikilink' href='index.html'>Language</a> | <a class='wikilink' href='Libraries.html'>Libraries</a> | <a class='wikilink' href='Comparison.html'>Comparison</a> | <a class='wikilink' href='Changes.html'>Changes</a>
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<p class='vspace'></p><p><a class='wikilink' href='EEPROM.html'>EEPROM</a>
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</p>
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<p class='vspace'></p><h2>read()</h2>
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<h4>Description</h4>
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<p>Reads a byte from the EEPROM. Locations that have never been written to have the value of 255.
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</p>
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<p class='vspace'></p><h4>Syntax</h4>
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<p>EEPROM.read(address)
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</p>
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<p class='vspace'></p><h4>Parameters</h4>
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<p>address: the location to read from, starting from 0 (<em>int</em>)
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</p>
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<p class='vspace'></p><h4>Returns</h4>
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<p>the value stored in that location (<em>byte</em>)
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</p>
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<p class='vspace'></p><h4>Example</h4>
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<pre>
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#include <EEPROM.h>
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int a = 0;
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int value;
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void setup()
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{
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Serial.begin(9600);
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}
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void loop()
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{
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value = EEPROM.read(a);
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Serial.print(a);
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Serial.print("\t");
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Serial.print(value);
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Serial.println();
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a = a + 1;
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if (a == 512)
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a = 0;
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delay(500);
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}
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</pre>
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<p class='vspace'></p><h4>See also</h4>
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<ul><li><a class='wikilink' href='EEPROMWrite.html'>write</a>()
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</li></ul><p class='vspace'></p><p><a class='wikilink' href='index.html'>Reference Home</a>
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<p class='vspace'></p><p><em>Corrections, suggestions, and new documentation should be posted to the <a class='urllink' href='http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?board=swbugs' rel='nofollow'>Forum</a>.</em>
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</p>
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<p class='vspace'></p><p>The text of the Arduino reference is licensed under a
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<a class='urllink' href='http://creativecommons.org/licenses/by-sa/3.0/' rel='nofollow'>Creative Commons Attribution-ShareAlike 3.0 License</a>. Code samples in the reference are released into the public domain.
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