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<h3>Summary</h3> |
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<p>Receive 16 bit stereo audio from the |
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<a href="http://www.pjrc.com/store/teensy3_audio.html" target="_blank">audio shield</a> |
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or another I2S device.</p> |
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or another I2S device, using I2S master mode.</p> |
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<p align=center><img src="audioshield_inputs.jpg"></p> |
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<h3>Audio Connections</h3> |
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<table class=doc align=center cellpadding=3> |
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@@ -64,11 +64,31 @@ |
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}); |
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</script> |
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<script type="text/x-red" data-help-name="AnalogInputI2Sslave"> |
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<p>Receive 16 bit stereo audio from a I2S device using slave mode</p> |
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<p>Stereo audio input from the audio shield or other I2S device</p> |
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<p><b>TODO</b> Add object documetation here</b>.</p> |
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<h3>Summary</h3> |
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<p>Receive 16 bit stereo audio from an I2S device using I2S slave mode.</p> |
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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>Function</th></tr> |
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<tr class=odd><td align=center>Out 0</td><td>Left Channel</td></tr> |
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<tr class=odd><td align=center>Out 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 the I2S hardware to its 2 output ports.</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>13</td><td>RX</td><td>Input</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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<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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</script> |
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<script type="text/x-red" data-template-name="AnalogInputI2Sslave"> |
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<div class="form-row"> |
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@@ -90,7 +110,31 @@ |
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}); |
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</script> |
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<script type="text/x-red" data-help-name="AnalogInputADC"> |
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<p><b>TODO</b> Add object documetation here</b>.</p> |
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<h3>Summary</h3> |
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<p>Receive 12 bit audio using the built-in analog to digital converter.</p> |
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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>Function</th></tr> |
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<tr class=odd><td align=center>Out 0</td><td>Audio Channel</td></tr> |
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</table> |
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<h3>Parameters</h3> |
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<table class=doc align=center cellpadding=3> |
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<tr class=top><th>Name</th><th>Type</th><th>Function</th></tr> |
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<tr class=odd><td align=center>Pin</td><td>Integer</td><td>Analog Pin To Use</td></tr> |
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</table> |
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<p>The pin number should be specified as "A0" to "A20"</p> |
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<p align=center><img src="adcpins2.jpg"></p> |
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<p align=center><img src="adcpins1.jpg"></p> |
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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 the ADC to its output ports.</p> |
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<h3>Hardware</h3> |
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<p>Signal range is 0 to 1.2V</p> |
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<p>Need for DC bias, approx 0.6V</p> |
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<h3>Notes</h3> |
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<p>Algorithm for automatic DC bias tracking</p> |
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<p>Noise due to high source impedance</p> |
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<p>Power Supply rejection issue with simple DC bias</p> |
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</script> |
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<script type="text/x-red" data-template-name="AnalogInputADC"> |
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<div class="form-row"> |
PaulStoffregen
10 年前
