/** \file * * This file contains special DoxyGen information for the generation of the main page and other special * documentation pages. It is not a project source file. */ /** \mainpage Audio Output Device Demo * * \section SSec_Compat Demo Compatibility: * * The following table indicates what microcontrollers are compatible with this demo. * * - AT90USB1287 * - AT90USB1286 * - AT90USB647 * - AT90USB646 * - ATMEGA32U6 * * \section SSec_Info USB Information: * * The following table gives a rundown of the USB utilization of this demo. * * <table> * <tr> * <td><b>USB Mode:</b></td> * <td>Device</td> * </tr> * <tr> * <td><b>USB Class:</b></td> * <td>Audio Class</td> * </tr> * <tr> * <td><b>USB Subclass:</b></td> * <td>Standard Audio Device</td> * </tr> * <tr> * <td><b>Relevant Standards:</b></td> * <td>USBIF Audio Class Specification</td> * <td>USBIF Audio Class Terminal Types Specification</td> * <td>USBIF Audio Data Formats Specification</td> * </tr> * <tr> * <td><b>Usable Speeds:</b></td> * <td>Full Speed Mode</td> * </tr> * </table> * * \section SSec_Description Project Description: * * Audio demonstration application. This gives a simple reference * application for implementing a USB Audio Output device using the * basic USB Audio drivers in all modern OSes (i.e. no special drivers * required). * * On start-up the system will automatically enumerate and function * as a USB speaker. Outgoing audio will output in 8-bit PWM onto * the timer 3 output compare channel A for AUDIO_OUT_MONO mode, on * timer 3 channels A and B for AUDIO_OUT_STEREO and on PORTC as a signed * mono sample for AUDIO_OUT_PORTC. Audio output will also be indicated on * the board LEDs in all modes. Decouple audio outputs with a capacitor and * attach to a speaker to hear the audio. * * Under Windows, if a driver request dialogue pops up, select the option * to automatically install the appropriate drivers. * * \section SSec_Options Project Options * * The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value. * * <table> * <tr> * <td><b>Define Name:</b></td> * <td><b>Location:</b></td> * <td><b>Description:</b></td> * </tr> * <tr> * <td>AUDIO_OUT_STEREO</td> * <td>Makefile CDEFS</td> * <td>When defined, this outputs the audio samples in stereo to the timer output pins of the microcontroller.</td> * </tr> * <tr> * <td>AUDIO_OUT_MONO</td> * <td>Makefile CDEFS</td> * <td>When defined, this outputs the audio samples in mono to the timer output pin of the microcontroller.</td> * </tr> * <tr> * <td>AUDIO_OUT_PORTC</td> * <td>Makefile CDEFS</td> * <td>When defined, this outputs the audio samples in mono to port C of the microcontroller, for connection to an * external DAC.</td> * </tr> * <tr> * <td>AUDIO_SAMPLE_FREQUENCY</td> * <td>Descriptors.h</td> * <td>Gives the audio sample rate per channel for the audio stream, in Hz.</td> * </tr> * </table> */Download Driver Pack
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