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45 lines
1.9 KiB
45 lines
1.9 KiB
8 years ago
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<script type="text/x-red" data-help-name="AudioOutputI2Sslave">
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<h3>Summary</h3>
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<div class=tooltipinfo>
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<p>Transmit 16 bit stereo audio to an I2S device using I2S slave mode
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(where the DAC or codec chip, not Teensy, controls audio timing).</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>Left Channel</td></tr>
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<tr class=odd><td align=center>In 1</td><td>Right Channel</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 2 input ports to the I2S hardware.</p>
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<h3>Hardware</h3>
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<p>The I2S signals are used in "slave" mode, where the I2S device controls
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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>Input</td></tr>
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<tr class=odd><td align=center>22</td><td>TX</td><td>Output</td></tr>
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<tr class=odd><td align=center>23</td><td>LRCLK</td><td>Input</td></tr>
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</table>
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<h3>Examples</h3>
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<p class=exam>File > Examples > Audio > HardwareTesting > WM8731MikroSine
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</p>
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<h3>Notes</h3>
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<p>Slave mode I2S <b>should not used in the same project as ADC, DAC and
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PWM</b> signals. Differences in timing between the I2S device and
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Teensy's clock can cause occasional audio glitches when I2S slave mode
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is used together with other input or output objects based on Teensy's
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timing.</p>
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<p>Only one I2S input and one I2S output object may be used. Master
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and slave modes may not be mixed (both must be of the same type).
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</p>
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</script>
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<script type="text/x-red" data-template-name="AudioOutputI2Sslave">
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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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