/** \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. * * * * * * * * * * * * * * * * * * * * * * * * *
USB Mode:Device
USB Class:Audio Class
USB Subclass:Standard Audio Device
Relevant Standards:USBIF Audio Class SpecificationUSBIF Audio Class Terminal Types SpecificationUSBIF Audio Data Formats Specification
Usable Speeds:Full Speed Mode
* * \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. Incoming audio will output in 8-bit PWM onto * the timer output (timer 3 for the AT90USBXXX6/7 USB AVRs, timer 1 for * the AT90USBXXX2 controller AVRs) compare channel A for AUDIO_OUT_MONO * mode, on channels A and B for AUDIO_OUT_STEREO and on the board LEDs * for AUDIO_OUT_LEDS mode. 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. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Define Name:Location:Description:
AUDIO_OUT_STEREOMakefile CDEFSWhen defined, this outputs the audio samples in stereo to the timer output pins of the microcontroller.
AUDIO_OUT_MONOMakefile CDEFSWhen defined, this outputs the audio samples in mono to the timer output pin of the microcontroller.
AUDIO_OUT_LEDSMakefile CDEFSWhen defined, this outputs the audio samples in stereo to the board LEDs.
AUDIO_OUT_PORTCMakefile CDEFSWhen defined, this outputs the audio samples in mono to port C of the microcontroller, for connection to an * external DAC.
AUDIO_SAMPLE_FREQUENCYDescriptors.hGives the audio sample rate per channel for the audio stream, in Hz.
*/