blob: 8f0c7d656cd3dfcf5f79c0a5ddbc085caa38035c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/** \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 Sec_Compat Demo Compatibility:
*
* The following list indicates what microcontrollers are compatible with this demo.
*
* \li Series 7 USB AVRs (AT90USBxxx7)
* \li Series 6 USB AVRs (AT90USBxxx6)
* \li Series 4 USB AVRs (ATMEGAxxU4)
*
* \section Sec_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 1.0 Class Specification \n
* USBIF Audio 1.0 Class Terminal Types Specification \n
* USBIF Audio 1.0 Data Formats Specification</td>
* </tr>
* <tr>
* <td><b>Supported USB Speeds:</b></td>
* <td>Full Speed Mode</td>
* </tr>
* </table>
*
* \section Sec_Description Project Description:
*
* Audio demonstration application. This gives a simple reference
* application for implementing a USB Audio Output device using the
* basic USB Audio 1.0 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 Sec_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>
* <th><b>Define Name:</b></th>
* <th><b>Location:</b></th>
* <th><b>Description:</b></th>
* </tr>
* <tr>
* <td>AUDIO_OUT_STEREO</td>
* <td>AppConfig.h</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>AppConfig.h</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>AppConfig.h</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>
* </table>
*/
|
