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/** \file
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*
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* This file contains special DoxyGen information for the generation of the main page and other special
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* documentation pages. It is not a project source file.
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*/
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/** \mainpage Audio Input Device Demo
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*
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* \section Sec_Compat Demo Compatibility:
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*
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* The following list indicates what microcontrollers are compatible with this demo.
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*
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* \li Series 7 USB AVRs (AT90USBxxx7)
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* \li Series 6 USB AVRs (AT90USBxxx6)
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* \li Series 4 USB AVRs (ATMEGAxxU4)
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*
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* \section Sec_Info USB Information:
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*
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* The following table gives a rundown of the USB utilization of this demo.
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*
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* <table>
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* <tr>
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* <td><b>USB Mode:</b></td>
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* <td>Device</td>
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* </tr>
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* <tr>
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* <td><b>USB Class:</b></td>
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* <td>Audio Class</td>
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* </tr>
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* <tr>
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* <td><b>USB Subclass:</b></td>
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* <td>Standard Audio Device</td>
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* </tr>
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* <tr>
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* <td><b>Relevant Standards:</b></td>
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* <td>USBIF Audio 1.0 Class Specification \n
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* USBIF Audio 1.0 Class Terminal Types Specification \n
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* USBIF Audio 1.0 Data Formats Specification</td>
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* </tr>
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* <tr>
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* <td><b>Supported USB Speeds:</b></td>
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* <td>Full Speed Mode</td>
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* </tr>
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* </table>
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*
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* \section Sec_Description Project Description:
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*
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* Audio demonstration application. This gives a simple reference
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* application for implementing a USB Audio Input device using the
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* basic USB Audio 1.0 drivers in all modern OSes (i.e. no special drivers
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* required).
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*
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* On start-up the system will automatically enumerate and function as a
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* USB microphone. By default, the demo will produce a square wave test tone
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* when the board button is pressed. If USE_TEST_TONE is not defined in the
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* project makefile, incoming audio from the ADC channel 1 will be sampled
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* and sent to the host computer instead.
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*
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* When in microphone mode, connect a microphone to the ADC channel 2.
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*
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* Under Windows, if a driver request dialogue pops up, select the option
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* to automatically install the appropriate drivers.
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*
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* \section Sec_Options Project Options
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*
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* The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
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*
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* <table>
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* <tr>
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* <th><b>Define Name:</b></th>
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* <th><b>Location:</b></th>
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* <th><b>Description:</b></th>
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* </tr>
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* <tr>
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* <td>MIC_IN_ADC_CHANNEL</td>
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* <td>AppConfig.h</td>
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* <td>Sets the ADC channel used by the demo for the input audio samples from an attached microphone.</td>
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* </tr>
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* <tr>
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* <td>USE_TEST_TONE</td>
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* <td>AppConfig.h</td>
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* <td>When defined, this alters the demo to produce a square wave test tone when the first board button is pressed
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* instead of sampling the board microphone.</td>
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* </tr>
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* <tr>
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* <td>MICROPHONE_BIASED_TO_HALF_RAIL</td>
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* <td>AppConfig.h</td>
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* <td>When defined, this alters the demo so that the half VCC bias of the microphone input is subtracted.</td>
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* </tr>
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* </table>
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*/
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