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Altera DE2-115 User Manual Page 87

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o Button_Switch Control: display the status of button and switches
o Hot-plug: Reconnect
Figure 6-6 illustrates the setup for this demonstration.
Figure 6-6 Setup for the USB device demonstration
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This demonstration uses the microphone-in, line-in, and line-out ports on the DE2-115 board to
create a Karaoke Machine application. The Wolfson WM8731 audio CODEC is configured in the
master mode, with which the audio CODEC generates AD/DA serial bit clock (BCK) and the
left/right channel clock (LRCK) automatically. As indicated in Figure 6-7, the I2C interface is used
to configure the Audio CODEC. The sample rate and gain of the CODEC are set in this manner, and
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