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teensy-audio/gui/resources/help/AudioOutputI2S.html

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  1. 

  2. 	<h3>Summary</h3>

  3. 	<p>Transmit 16 bit stereo audio to the

  4. 	<a href="http://www.pjrc.com/store/teensy3_audio.html" target="_blank">audio shield</a>

  5. 		or another I2S device, using I2S master mode.</p>

  6. 	<p align=center><img src="img/audioshield_outputs.jpg"></p>

  7. 	<h3>Audio Connections</h3>

  8. 	<table class=doc align=center cellpadding=3>

  9. 		<tr class=top><th>Port</th><th>Purpose</th></tr>

  10. 		<tr class=odd><td align=center>In 0</td><td>Left Channel</td></tr>

  11. 		<tr class=odd><td align=center>In 1</td><td>Right Channel</td></tr>

  12. 	</table>

  13. 	<h3>Functions</h3>

  14. 	<p>This object has no functions to call from the Arduino sketch.  It

  15. 		simply streams data from its 2 input ports to the I2S hardware.</p>

  16. 	<h3>Hardware</h3>

  17. 	<p align=center><img src="img/audioshield_backside.jpg"></p>

  18. 	<p>The I2S signals are used in "master" mode, where Teensy creates

  19. 		all 3 clock signals and controls all data timing.</p>

  20. 	<table class=doc align=center cellpadding=3>

  21. 		<tr class=top><th>Pin</th><th>Signal</th><th>Direction</th></tr>

  22. 		<tr class=odd><td align=center>9</td><td>BCLK</td><td>Output</td></tr>

  23. 		<tr class=odd><td align=center>11</td><td>MCLK</td><td>Output</td></tr>

  24. 		<tr class=odd><td align=center>22</td><td>TX</td><td>Output</td></tr>

  25. 		<tr class=odd><td align=center>23</td><td>LRCLK</td><td>Output</td></tr>

  26. 	</table>

  27. 	<p>Audio from

  28. 		master mode I2S may be used in the same project as ADC, DAC and

  29. 		PWM signals, because all remain in sync to Teensy's timing</p>

  30. 	<h3>Examples</h3>

  31. 	<p>Nearly all the examples use this object.  Here are some of the highlights:</p>

  32. 	<p class=exam>File &gt; Examples &gt; Audio &gt; HardwareTesting &gt; PassThroughStereo

  33. 	</p>

  34. 	<p class=exam>File &gt; Examples &gt; Audio &gt; SamplePlayer

  35. 	</p>

  36. 	<p class=exam>File &gt; Examples &gt; Audio &gt; Recorder

  37. 	</p>

  38. 	<p class=exam>File &gt; Examples &gt; Audio &gt; WavFilePlayer

  39. 	</p>

  40. 	<p class=exam>File &gt; Examples &gt; Audio &gt; Effects &gt; Chorus

  41. 	</p>

  42. 	<p class=exam>File &gt; Examples &gt; Audio &gt; Synthesis &gt; PlaySynthMusic

  43. 	</p>

  44. 	<h3>Notes</h3>

  45. 	<p>Normally, this object is used with the Audio Shield, which

  46. 		is controlled separately by the "sgtl5000" object.</p>

  47. 	<p>Only one I2S input and one I2S output object may be used.  Master

  48. 		and slave modes may not be mixed (both must be of the same type).

  49. 	</p>