1e41f4b71Sopenharmony_ci# UsbConfigDescriptor 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## 概述 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ci标准配置描述符，对应USB协议中Standard Configuration Descriptor。 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ci**起始版本：** 9e41f4b71Sopenharmony_ci 10e41f4b71Sopenharmony_ci10 11e41f4b71Sopenharmony_ci 12e41f4b71Sopenharmony_ci**相关模块:** 13e41f4b71Sopenharmony_ci 14e41f4b71Sopenharmony_ci[USB DDK](_usb_ddk.md) 15e41f4b71Sopenharmony_ci 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci## 汇总 18e41f4b71Sopenharmony_ci 19e41f4b71Sopenharmony_ci 20e41f4b71Sopenharmony_ci### 成员变量 21e41f4b71Sopenharmony_ci 22e41f4b71Sopenharmony_ci| 名称 | 描述 | 23e41f4b71Sopenharmony_ci| -------- | -------- | 24e41f4b71Sopenharmony_ci| [bLength](#blength) | 该描述符的大小，单位为字节。 | 25e41f4b71Sopenharmony_ci| [bDescriptorType](#bdescriptortype) | 描述符类型。 | 26e41f4b71Sopenharmony_ci| [wTotalLength](#wtotallength) | 该配置描述符的总长度，包含配置、接口、端点和特定于类或供应商的描述符。 | 27e41f4b71Sopenharmony_ci| [bNumInterfaces](#bnuminterfaces) | 该配置所支持的接口数量。 | 28e41f4b71Sopenharmony_ci| [bConfigurationValue](#bconfigurationvalue) | 设置配置所需要的参数，用来选择当前配置。 | 29e41f4b71Sopenharmony_ci| [iConfiguration](#iconfiguration) | 描述该配置的字符串描述符的索引。 | 30e41f4b71Sopenharmony_ci| [bmAttributes](#bmattributes) | 配置属性，包含供电模式、远程唤醒等配置。 | 31e41f4b71Sopenharmony_ci| [bMaxPower](#bmaxpower) | 总线供电的USB设备的最大功耗，以2mA为单位。 | 32e41f4b71Sopenharmony_ci 33e41f4b71Sopenharmony_ci 34e41f4b71Sopenharmony_ci## 结构体成员变量说明 35e41f4b71Sopenharmony_ci 36e41f4b71Sopenharmony_ci 37e41f4b71Sopenharmony_ci### bConfigurationValue 38e41f4b71Sopenharmony_ci 39e41f4b71Sopenharmony_ci 40e41f4b71Sopenharmony_ci``` 41e41f4b71Sopenharmony_ciuint8_t UsbConfigDescriptor::bConfigurationValue 42e41f4b71Sopenharmony_ci``` 43e41f4b71Sopenharmony_ci 44e41f4b71Sopenharmony_ci**描述:** 45e41f4b71Sopenharmony_ci 46e41f4b71Sopenharmony_ci设置配置所需要的参数，用来选择当前配置。 47e41f4b71Sopenharmony_ci 48e41f4b71Sopenharmony_ci 49e41f4b71Sopenharmony_ci### bDescriptorType 50e41f4b71Sopenharmony_ci 51e41f4b71Sopenharmony_ci 52e41f4b71Sopenharmony_ci``` 53e41f4b71Sopenharmony_ciuint8_t UsbConfigDescriptor::bDescriptorType 54e41f4b71Sopenharmony_ci``` 55e41f4b71Sopenharmony_ci 56e41f4b71Sopenharmony_ci**描述:** 57e41f4b71Sopenharmony_ci 58e41f4b71Sopenharmony_ci描述符类型。 59e41f4b71Sopenharmony_ci 60e41f4b71Sopenharmony_ci 61e41f4b71Sopenharmony_ci### bLength 62e41f4b71Sopenharmony_ci 63e41f4b71Sopenharmony_ci 64e41f4b71Sopenharmony_ci``` 65e41f4b71Sopenharmony_ciuint8_t UsbConfigDescriptor::bLength 66e41f4b71Sopenharmony_ci``` 67e41f4b71Sopenharmony_ci 68e41f4b71Sopenharmony_ci**描述:** 69e41f4b71Sopenharmony_ci 70e41f4b71Sopenharmony_ci该描述符的大小，单位为字节。 71e41f4b71Sopenharmony_ci 72e41f4b71Sopenharmony_ci 73e41f4b71Sopenharmony_ci### bmAttributes 74e41f4b71Sopenharmony_ci 75e41f4b71Sopenharmony_ci 76e41f4b71Sopenharmony_ci``` 77e41f4b71Sopenharmony_ciuint8_t UsbConfigDescriptor::bmAttributes 78e41f4b71Sopenharmony_ci``` 79e41f4b71Sopenharmony_ci 80e41f4b71Sopenharmony_ci**描述:** 81e41f4b71Sopenharmony_ci 82e41f4b71Sopenharmony_ci配置属性，包含供电模式、远程唤醒等配置。 83e41f4b71Sopenharmony_ci 84e41f4b71Sopenharmony_ci 85e41f4b71Sopenharmony_ci### bMaxPower 86e41f4b71Sopenharmony_ci 87e41f4b71Sopenharmony_ci 88e41f4b71Sopenharmony_ci``` 89e41f4b71Sopenharmony_ciuint8_t UsbConfigDescriptor::bMaxPower 90e41f4b71Sopenharmony_ci``` 91e41f4b71Sopenharmony_ci 92e41f4b71Sopenharmony_ci**描述:** 93e41f4b71Sopenharmony_ci 94e41f4b71Sopenharmony_ci总线供电的USB设备的最大功耗，以2mA为单位。 95e41f4b71Sopenharmony_ci 96e41f4b71Sopenharmony_ci 97e41f4b71Sopenharmony_ci### bNumInterfaces 98e41f4b71Sopenharmony_ci 99e41f4b71Sopenharmony_ci 100e41f4b71Sopenharmony_ci``` 101e41f4b71Sopenharmony_ciuint8_t UsbConfigDescriptor::bNumInterfaces 102e41f4b71Sopenharmony_ci``` 103e41f4b71Sopenharmony_ci 104e41f4b71Sopenharmony_ci**描述:** 105e41f4b71Sopenharmony_ci 106e41f4b71Sopenharmony_ci该配置所支持的接口数量。 107e41f4b71Sopenharmony_ci 108e41f4b71Sopenharmony_ci 109e41f4b71Sopenharmony_ci### iConfiguration 110e41f4b71Sopenharmony_ci 111e41f4b71Sopenharmony_ci 112e41f4b71Sopenharmony_ci``` 113e41f4b71Sopenharmony_ciuint8_t UsbConfigDescriptor::iConfiguration 114e41f4b71Sopenharmony_ci``` 115e41f4b71Sopenharmony_ci 116e41f4b71Sopenharmony_ci**描述:** 117e41f4b71Sopenharmony_ci 118e41f4b71Sopenharmony_ci描述该配置的字符串描述符的索引。 119e41f4b71Sopenharmony_ci 120e41f4b71Sopenharmony_ci 121e41f4b71Sopenharmony_ci### wTotalLength 122e41f4b71Sopenharmony_ci 123e41f4b71Sopenharmony_ci 124e41f4b71Sopenharmony_ci``` 125e41f4b71Sopenharmony_ciuint16_t UsbConfigDescriptor::wTotalLength 126e41f4b71Sopenharmony_ci``` 127e41f4b71Sopenharmony_ci 128e41f4b71Sopenharmony_ci**描述:** 129e41f4b71Sopenharmony_ci 130e41f4b71Sopenharmony_ci该配置描述符的总长度，包含配置、接口、端点和特定于类或供应商的描述符。 131