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51 lines
2.5 KiB
51 lines
2.5 KiB
8 years ago
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<script type="text/x-red" data-help-name="AudioOutputI2SQuad">
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<h3>Summary</h3>
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<div class=tooltipinfo>
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<p>Transmit quad (4) channel 16 bit audio, using I2S master mode.</p>
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<p align=center><img src="img/audioshield_quad_out.jpg"></p>
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</div>
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<h3>Audio Connections</h3>
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<table class=doc align=center cellpadding=3>
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<tr class=top><th>Port</th><th>Purpose</th></tr>
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<tr class=odd><td align=center>In 0</td><td>Channel #1</td></tr>
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<tr class=odd><td align=center>In 1</td><td>Channel #2</td></tr>
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<tr class=odd><td align=center>In 2</td><td>Channel #3</td></tr>
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<tr class=odd><td align=center>In 3</td><td>Channel #4</td></tr>
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</table>
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<h3>Functions</h3>
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<p>This object has no functions to call from the Arduino sketch. It
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simply streams data from its 4 input ports to the I2S hardware.</p>
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<h3>Hardware</h3>
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<p>See this Sparkfun blog for <a href="https://www.sparkfun.com/news/2055" target="_blank">how
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to connect two audio adaptors for 4 channel audio</a>. More
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<a href="https://forum.pjrc.com/threads/29373-Bit-bang-multiple-I2S-inputs-simultaneously?p=79606#post79606" target="_blank">details</a> are also available.
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<p>The I2S signals are used in "master" mode, where Teensy creates
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all 3 clock signals and controls all data timing.</p>
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<table class=doc align=center cellpadding=3>
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<tr class=top><th>Pin</th><th>Signal</th><th>Direction</th></tr>
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<tr class=odd><td align=center>9</td><td>BCLK</td><td>Output</td></tr>
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<tr class=odd><td align=center>11</td><td>MCLK</td><td>Output</td></tr>
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<tr class=odd><td align=center>22</td><td>TX (ch 1+2)</td><td>Output</td></tr>
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<tr class=odd><td align=center>15</td><td>TX (ch 3+4)</td><td>Output</td></tr>
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<tr class=odd><td align=center>23</td><td>LRCLK</td><td>Output</td></tr>
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</table>
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<p>Audio from
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master mode I2S may be used in the same project as ADC, DAC and
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PWM signals, because all remain in sync to Teensy's timing</p>
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<h3>Examples</h3>
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<p class=exam>File > Examples > Audio > HardwareTesting > PassThroughQuad
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</p>
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<p class=exam>File > Examples > Audio > HardwareTesting > SGTL5000 > QuadChannelOutput
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</p>
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<h3>Notes</h3>
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<p>Normally, this object is used with two Audio Shields, which
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are controlled separately by a pair of "sgtl5000" objects.</p>
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</script>
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<script type="text/x-red" data-template-name="AudioOutputI2SQuad">
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<div class="form-row">
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<label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
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<input type="text" id="node-input-name" placeholder="Name">
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</div>
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</script>
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