blob: cf7125949a869d888d93cb5bcfbb814c1c1d5a85 (
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
|
/** \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 Input Device Demo
*
* \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 Input 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 microphone. Incoming audio from the ADC channel 1 will
* be sampled and sent to the host computer.
*
* To use, connect a microphone to the ADC channel 2.
*
* 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>MICROPHONE_BIASED_TO_HALF_RAIL</td>
* <td>Makefile CDEFS</td>
* <td>When defined, this alters the demo so that the half VCC bias of the microphone input is subtracted.</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>
*/
|