Configuration Descriptor

最新推荐文章于 2023-10-28 11:27:50 发布

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最新推荐文章于 2023-10-28 11:27:50 发布 · 617 阅读

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This blog post delves into the structure of a USB audio device's Configuration Descriptor, detailing its components such as the configuration, interface, class-specific, and endpoint descriptors. It provides an example of a complete_configuration structure for a USB audio device, highlighting the roles of each descriptor type in defining the device's functionality." 98872487,7468154,目标检测中的非极大值抑制详解,"['目标检测', '计算机视觉', '图像处理']

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整個Configuration 分成4大部分 :

configuration
interface,
class or vendor specific( 如 HID， Audio）
endpoint

以一个usb audio 的设备configuration descriptor来举例：
typedef struct
{
configuration_descriptor cd; // Configuration descriptor
interface_descriptor id0; // Audio control interface
audio_header_descriptor ahd; // Audio control header
input_terminal_descriptor itd; // Audio input terminal
feature_unit_descriptor fud; // Audio feature unit
output_terminal_descriptor otd; // Audio output terminal
interface_descriptor id1_0; // Audio zero-bandwidth interface
interface_descriptor id1_1; // Audio streaming interface
stream_interface_descriptor sid; // Audio stream descriptor
typeI_format_descriptor tfd; // Audio format descriptor
stream_endpoint_descriptor sed; // Streaming endpoint descriptor
audio_endpoint_descriptor aed; // Audio endpoint descriptor
interface_descriptor id2; // HID interface descriptor
hid_descriptor hd; // HID descriptor
endpoint_descriptor ed1; // GET_REPORT input endpoint
endpoint_descriptor ed2; // SET_REPORT output endpoint
} complete_configuration; // End of complete_configuration

configuration_descriptor：
{ // Standard configuration descriptor
0x09, // bLength (9)
0x02, // bDescriptorType (CONFIGURATION)
0x9100, // wTotallength (145)
0x03, // bNumInte