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<!-- doxytag: class="IRreceiver" -->
<p>Manages the reception of RC-5 commands from an infrared remote control.
<a href="classIRreceiver.html#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="IRreceiver_8h_source.html">IRreceiver.h</a>&gt;</code></p>
<p><a href="classIRreceiver-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a06eccb8b8311eac395e4b20c4e0163e3"></a><!-- doxytag: member="IRreceiver::IRreceiver" ref="a06eccb8b8311eac395e4b20c4e0163e3" args="(int interruptNumber=0)" -->
&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classIRreceiver.html#a06eccb8b8311eac395e4b20c4e0163e3">IRreceiver</a> (int interruptNumber=0)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Constructs a new infrared remote control receiver that is attached to <em>interruptNumber</em>. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda">command</a> ()</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the next command from the remote control. <a href="#a4b021592a2b089dc2f1e138a38506fda"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f">system</a> () const </td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the system number of the previous <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a>, indicating whether the command was for a TV, VCR, CD player, etc. <a href="#a19e9334ae97812fa85078507d105478f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classIRreceiver.html#a2c6adc404f71f263ba535ec1ed9cff1a">systemFilter</a> () const </td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the system to filter commands against, or -1 if no filter is set. <a href="#a2c6adc404f71f263ba535ec1ed9cff1a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classIRreceiver.html#a920828f1411fa12d1856cd933066bd08">setSystemFilter</a> (int system)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets the <em>system</em> to filter commands against, or -1 to turn off the system filter. <a href="#a920828f1411fa12d1856cd933066bd08"></a><br/></td></tr>
<tr><td colspan="2"><h2><a name="pub-static-attribs"></a>
Static Public Attributes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9c37631cc1291dc47cabcfef2f631cf9"></a><!-- doxytag: member="IRreceiver::AUTO_REPEAT" ref="a9c37631cc1291dc47cabcfef2f631cf9" args="" -->
static const int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classIRreceiver.html#a9c37631cc1291dc47cabcfef2f631cf9">AUTO_REPEAT</a> = 128</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Flag that is added to the output of <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a> when the command is an auto-repeated button press rather than the original button press. <br/></td></tr>
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Friends</h2></td></tr>
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void&#160;</td><td class="memItemRight" valign="bottom"><b>_IR_receive_interrupt</b> (void)</td></tr>
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<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Manages the reception of RC-5 commands from an infrared remote control. </p>
<p><a class="el" href="classIRreceiver.html" title="Manages the reception of RC-5 commands from an infrared remote control.">IRreceiver</a> recognizes commands in the <a href="http://en.wikipedia.org/wiki/RC-5">Philips RC-5 protocol</a>. This is a fairly common infrared protocol, supported by most universal remote controls. Program the universal remote to simulate a Philips TV, VCR, CD player, etc.</p>
<p>This class uses interrupts to process incoming bits from a standard 3-pin infrared receiver:</p>
<div class="image">
<img src="irchip.jpg" alt="irchip.jpg"/>
</div>
<p>Typically, pin 1 of the receiver should be connected to the Arduino interrupt pin (e.g. D2), pin 2 should be connected to GND, and pin 3 should be connected to 5V. Consult the datasheet for your receiver to be sure though; some receivers may have different pin assignments.</p>
<p>The receiver is initialized by constructing an instance of the <a class="el" href="classIRreceiver.html" title="Manages the reception of RC-5 commands from an infrared remote control.">IRreceiver</a> class:</p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classIRreceiver.html" title="Manages the reception of RC-5 commands from an infrared remote control.">IRreceiver</a> ir;
</pre></div><p>By default, interrupt 0 on pin D2 is used. To change to another interrupt, pass its number to the constructor:</p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classIRreceiver.html" title="Manages the reception of RC-5 commands from an infrared remote control.">IRreceiver</a> ir(1); <span class="comment">// Interrupt 1 on pin D3</span>
</pre></div><p>Currently this class can only handle a single instance of <a class="el" href="classIRreceiver.html" title="Manages the reception of RC-5 commands from an infrared remote control.">IRreceiver</a> being active in the application. It isn't possible to have separate <a class="el" href="classIRreceiver.html" title="Manages the reception of RC-5 commands from an infrared remote control.">IRreceiver</a> instances on different pins. Usually this won't be a problem because the same receiver can process inputs from multiple remotes.</p>
<p>The application retrieves incoming infrared commands by calling the <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a> function. The return value indicates the type of command:</p>
<div class="fragment"><pre class="fragment"> <span class="keywordtype">void</span> loop() {
<span class="keywordflow">switch</span> (ir.<a class="code" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command</a>()) {
<span class="keywordflow">case</span> RC5_0: <span class="keywordflow">case</span> RC5_1: <span class="keywordflow">case</span> RC5_2: <span class="keywordflow">case</span> RC5_3: <span class="keywordflow">case</span> RC5_4:
<span class="keywordflow">case</span> RC5_5: <span class="keywordflow">case</span> RC5_6: <span class="keywordflow">case</span> RC5_7: <span class="keywordflow">case</span> RC5_8: <span class="keywordflow">case</span> RC5_9:
<span class="comment">// Process a digit</span>
...
<span class="keywordflow">break</span>;
<span class="keywordflow">case</span> RC5_ERASE:
<span class="comment">// Backspace/erase last digit.</span>
...
<span class="keywordflow">break</span>;
<span class="keywordflow">case</span> RC5_STANDBY:
<span class="comment">// Power on/off button.</span>
...
<span class="keywordflow">break</span>;
}
}
</pre></div><p>If the command is an auto-repeat of a previous button press, then the <a class="el" href="classIRreceiver.html#a9c37631cc1291dc47cabcfef2f631cf9">AUTO_REPEAT</a> flag will be set in the value returned from <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a>. The application can choose to ignore all auto-repeats, process all auto-repeats, or choose which button to auto-repeat based on its code:</p>
<div class="fragment"><pre class="fragment"> <span class="keywordtype">void</span> loop() {
<span class="keywordflow">switch</span> (ir.<a class="code" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command</a>()) {
<span class="keywordflow">case</span> RC5_INC_VOLUME:
<span class="keywordflow">case</span> IRreceiver::AUTO_REPEAT | RC5_INC_VOLUME:
<span class="comment">// Volume increase button pressed or held.</span>
...
<span class="keywordflow">break</span>;
<span class="keywordflow">case</span> RC5_DEC_VOLUME:
<span class="keywordflow">case</span> IRreceiver::AUTO_REPEAT | RC5_DEC_VOLUME:
<span class="comment">// Volume decrease button pressed or held.</span>
...
<span class="keywordflow">break</span>;
<span class="keywordflow">case</span> RC5_MUTE:
<span class="comment">// Mute button (ignore auto-repeat).</span>
...
<span class="keywordflow">break</span>;
}
}
</pre></div><p>By default, command codes will be generated for every type of RC-5 remote control, be it a TV, VCR, CD player, or something else. The application can distinguish between the remote controls using <a class="el" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f" title="Returns the system number of the previous command(), indicating whether the command was for a TV...">system()</a>; noting that <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a> must be called before <a class="el" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f" title="Returns the system number of the previous command(), indicating whether the command was for a TV...">system()</a> for the system value to be valid. For example, the following code could be used in a two-player video game where the first player's remote is configured as a TV and the second player's remote is configured as a VCR:</p>
<div class="fragment"><pre class="fragment"> <span class="keywordtype">void</span> loop() {
<span class="keywordtype">int</span> cmd = ir.<a class="code" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command</a>();
<span class="keywordtype">int</span> sys = ir.<a class="code" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f" title="Returns the system number of the previous command(), indicating whether the command was for a TV...">system</a>();
<span class="keywordflow">if</span> (sys == RC5_SYS_TV)
player1(cmd);
<span class="keywordflow">else</span> <span class="keywordflow">if</span> (sys == RC5_SYS_VCR)
player2(cmd);
...
}
</pre></div><p>If the application only cares about a single system and wishes to ignore all other systems, it can configure a system filter at startup:</p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classIRreceiver.html" title="Manages the reception of RC-5 commands from an infrared remote control.">IRreceiver</a> ir;
<span class="keywordtype">void</span> setup() {
ir.<a class="code" href="classIRreceiver.html#a920828f1411fa12d1856cd933066bd08" title="Sets the system to filter commands against, or -1 to turn off the system filter.">setSystemFilter</a>(RC5_SYS_VCR);
}
</pre></div><p>The complete list of RC-5 system numbers and command codes is given in the <a class="el" href="RC5_8h_source.html">RC5.h</a> header file.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="ir_dumpir.html">DumpIR Example</a> </dd></dl>
<p>Definition at line <a class="el" href="IRreceiver_8h_source.html#l00029">29</a> of file <a class="el" href="IRreceiver_8h_source.html">IRreceiver.h</a>.</p>
</div><hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a4b021592a2b089dc2f1e138a38506fda"></a><!-- doxytag: member="IRreceiver::command" ref="a4b021592a2b089dc2f1e138a38506fda" args="()" -->
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<td class="memname">int IRreceiver::command </td>
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<td class="paramname"></td><td>)</td>
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<p>Returns the next command from the remote control. </p>
<p>Returns -1 if there is no new command, or the number between 0 and 127 corresponding to the command. If the command is an auto-repeat button press rather than an original button press, then the <a class="el" href="classIRreceiver.html#a9c37631cc1291dc47cabcfef2f631cf9">AUTO_REPEAT</a> flag will be set.</p>
<p>The companion function <a class="el" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f" title="Returns the system number of the previous command(), indicating whether the command was for a TV...">system()</a> will return the system number for the command indicating whether the command is for a TV, VCR, CD player, etc. By default, all systems are reported; use <a class="el" href="classIRreceiver.html#a920828f1411fa12d1856cd933066bd08" title="Sets the system to filter commands against, or -1 to turn off the system filter.">setSystemFilter()</a> to filter out commands from all but a specific system.</p>
<p>The next call to <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a> will return -1 or the code for the next button press.</p>
<p>The header file <code><a class="el" href="RC5_8h_source.html">RC5.h</a></code> contains a list of command codes for common remote controls.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f" title="Returns the system number of the previous command(), indicating whether the command was for a TV...">system()</a>, <a class="el" href="classIRreceiver.html#a920828f1411fa12d1856cd933066bd08" title="Sets the system to filter commands against, or -1 to turn off the system filter.">setSystemFilter()</a> </dd></dl>
<p>Definition at line <a class="el" href="IRreceiver_8cpp_source.html#l00220">220</a> of file <a class="el" href="IRreceiver_8cpp_source.html">IRreceiver.cpp</a>.</p>
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<a class="anchor" id="a920828f1411fa12d1856cd933066bd08"></a><!-- doxytag: member="IRreceiver::setSystemFilter" ref="a920828f1411fa12d1856cd933066bd08" args="(int system)" -->
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<td class="memname">void IRreceiver::setSystemFilter </td>
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<td class="paramtype">int&#160;</td>
<td class="paramname"><em>system</em></td><td>)</td>
<td><code> [inline]</code></td>
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<p>Sets the <em>system</em> to filter commands against, or -1 to turn off the system filter. </p>
<p>If <em>system</em> is -1, then all received systems are returned via <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a> and <a class="el" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f" title="Returns the system number of the previous command(), indicating whether the command was for a TV...">system()</a> irrespective of whether they are for a TV, VCR, CD player, or some other type of system. If <em>system</em> is set to anything other than -1, then only commands for that system are returned via <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a>. For example:</p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classIRreceiver.html" title="Manages the reception of RC-5 commands from an infrared remote control.">IRreceiver</a> ir;
ir.<a class="code" href="classIRreceiver.html#a920828f1411fa12d1856cd933066bd08" title="Sets the system to filter commands against, or -1 to turn off the system filter.">setSystemFilter</a>(RC5_SYS_VCR);
</pre></div><dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classIRreceiver.html#a2c6adc404f71f263ba535ec1ed9cff1a" title="Returns the system to filter commands against, or -1 if no filter is set.">systemFilter()</a>, <a class="el" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f" title="Returns the system number of the previous command(), indicating whether the command was for a TV...">system()</a>, <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a> </dd></dl>
<p>Definition at line <a class="el" href="IRreceiver_8h_source.html#l00040">40</a> of file <a class="el" href="IRreceiver_8h_source.html">IRreceiver.h</a>.</p>
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<a class="anchor" id="a19e9334ae97812fa85078507d105478f"></a><!-- doxytag: member="IRreceiver::system" ref="a19e9334ae97812fa85078507d105478f" args="() const " -->
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<p>Returns the system number of the previous <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a>, indicating whether the command was for a TV, VCR, CD player, etc. </p>
<p>The return value from this function is valid only after a call to <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a>. The next call to <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a> will clear the system value, possibly to -1 if there is no new command.</p>
<p>The header file <code><a class="el" href="RC5_8h_source.html">RC5.h</a></code> contains a list of system numbers for common remote controls.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a>, <a class="el" href="classIRreceiver.html#a920828f1411fa12d1856cd933066bd08" title="Sets the system to filter commands against, or -1 to turn off the system filter.">setSystemFilter()</a> </dd></dl>
<p>Definition at line <a class="el" href="IRreceiver_8h_source.html#l00037">37</a> of file <a class="el" href="IRreceiver_8h_source.html">IRreceiver.h</a>.</p>
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<a class="anchor" id="a2c6adc404f71f263ba535ec1ed9cff1a"></a><!-- doxytag: member="IRreceiver::systemFilter" ref="a2c6adc404f71f263ba535ec1ed9cff1a" args="() const " -->
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<p>Returns the system to filter commands against, or -1 if no filter is set. </p>
<p>If this value is -1, then all received systems are returned via <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a> and <a class="el" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f" title="Returns the system number of the previous command(), indicating whether the command was for a TV...">system()</a> irrespective of whether they are for a TV, VCR, CD player, or some other type of system. If this value is set to anything other than -1, then only commands for that system are returned via <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a>.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classIRreceiver.html#a920828f1411fa12d1856cd933066bd08" title="Sets the system to filter commands against, or -1 to turn off the system filter.">setSystemFilter()</a>, <a class="el" href="classIRreceiver.html#a19e9334ae97812fa85078507d105478f" title="Returns the system number of the previous command(), indicating whether the command was for a TV...">system()</a>, <a class="el" href="classIRreceiver.html#a4b021592a2b089dc2f1e138a38506fda" title="Returns the next command from the remote control.">command()</a> </dd></dl>
<p>Definition at line <a class="el" href="IRreceiver_8h_source.html#l00039">39</a> of file <a class="el" href="IRreceiver_8h_source.html">IRreceiver.h</a>.</p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="IRreceiver_8h_source.html">IRreceiver.h</a></li>
<li><a class="el" href="IRreceiver_8cpp_source.html">IRreceiver.cpp</a></li>
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