1e41f4b71Sopenharmony_ci# UsbDeviceDescriptor 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## 概述 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ci标准设备描述符，对应USB协议中Standard Device 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| [bcdUSB](#bcdusb) | USB协议发布号。 | 27e41f4b71Sopenharmony_ci| [bDeviceClass](#bdeviceclass) | 由USB标准化组织（USB-IF）分配的设备类代码。 | 28e41f4b71Sopenharmony_ci| [bDeviceSubClass](#bdevicesubclass) | 由USB标准化组织（USB-IF）分配的子类代码，其值由[bDeviceClass](#bdeviceclass)的值限定。 | 29e41f4b71Sopenharmony_ci| [bDeviceProtocol](#bdeviceprotocol) | 由USB标准化组织（USB-IF）分配的协议代码，其值由[bDeviceClass](#bdeviceclass)和[bDeviceSubClass](#bdevicesubclass)的值限定。 | 30e41f4b71Sopenharmony_ci| [bMaxPacketSize0](#bmaxpacketsize0) | 端点零的最大包大小，只有8，16，32，64是合法的。 | 31e41f4b71Sopenharmony_ci| [idVendor](#idvendor) | 由USB标准化组织（USB-IF）分配的厂商编号。 | 32e41f4b71Sopenharmony_ci| [idProduct](#idproduct) | 由厂商分配的产品编号。 | 33e41f4b71Sopenharmony_ci| [bcdDevice](#bcddevice) | 设备发布编号。 | 34e41f4b71Sopenharmony_ci| [iManufacturer](#imanufacturer) | 描述厂商的字符串描述符的索引。 | 35e41f4b71Sopenharmony_ci| [iProduct](#iproduct) | 描述产品的字符串描述符的索引。 | 36e41f4b71Sopenharmony_ci| [iSerialNumber](#iserialnumber) | 描述设备序列号的字符串描述符的索引。 | 37e41f4b71Sopenharmony_ci| [bNumConfigurations](#bnumconfigurations) | 配置数量。 | 38e41f4b71Sopenharmony_ci 39e41f4b71Sopenharmony_ci 40e41f4b71Sopenharmony_ci## 结构体成员变量说明 41e41f4b71Sopenharmony_ci 42e41f4b71Sopenharmony_ci 43e41f4b71Sopenharmony_ci### bcdDevice 44e41f4b71Sopenharmony_ci 45e41f4b71Sopenharmony_ci 46e41f4b71Sopenharmony_ci``` 47e41f4b71Sopenharmony_ciuint16_t UsbDeviceDescriptor::bcdDevice 48e41f4b71Sopenharmony_ci``` 49e41f4b71Sopenharmony_ci 50e41f4b71Sopenharmony_ci**描述:** 51e41f4b71Sopenharmony_ci 52e41f4b71Sopenharmony_ci设备发布编号。 53e41f4b71Sopenharmony_ci 54e41f4b71Sopenharmony_ci 55e41f4b71Sopenharmony_ci### bcdUSB 56e41f4b71Sopenharmony_ci 57e41f4b71Sopenharmony_ci 58e41f4b71Sopenharmony_ci``` 59e41f4b71Sopenharmony_ciuint16_t UsbDeviceDescriptor::bcdUSB 60e41f4b71Sopenharmony_ci``` 61e41f4b71Sopenharmony_ci 62e41f4b71Sopenharmony_ci**描述:** 63e41f4b71Sopenharmony_ci 64e41f4b71Sopenharmony_ciUSB协议发布号。 65e41f4b71Sopenharmony_ci 66e41f4b71Sopenharmony_ci 67e41f4b71Sopenharmony_ci### bDescriptorType 68e41f4b71Sopenharmony_ci 69e41f4b71Sopenharmony_ci 70e41f4b71Sopenharmony_ci``` 71e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::bDescriptorType 72e41f4b71Sopenharmony_ci``` 73e41f4b71Sopenharmony_ci 74e41f4b71Sopenharmony_ci**描述:** 75e41f4b71Sopenharmony_ci 76e41f4b71Sopenharmony_ci描述符类型。 77e41f4b71Sopenharmony_ci 78e41f4b71Sopenharmony_ci 79e41f4b71Sopenharmony_ci### bDeviceClass 80e41f4b71Sopenharmony_ci 81e41f4b71Sopenharmony_ci 82e41f4b71Sopenharmony_ci``` 83e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::bDeviceClass 84e41f4b71Sopenharmony_ci``` 85e41f4b71Sopenharmony_ci 86e41f4b71Sopenharmony_ci**描述:** 87e41f4b71Sopenharmony_ci 88e41f4b71Sopenharmony_ci由USB标准化组织（USB-IF）分配的设备类代码。 89e41f4b71Sopenharmony_ci 90e41f4b71Sopenharmony_ci 91e41f4b71Sopenharmony_ci### bDeviceProtocol 92e41f4b71Sopenharmony_ci 93e41f4b71Sopenharmony_ci 94e41f4b71Sopenharmony_ci``` 95e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::bDeviceProtocol 96e41f4b71Sopenharmony_ci``` 97e41f4b71Sopenharmony_ci 98e41f4b71Sopenharmony_ci**描述:** 99e41f4b71Sopenharmony_ci 100e41f4b71Sopenharmony_ci由USB标准化组织（USB-IF）分配的协议代码，其值由[bDeviceClass](#bdeviceclass)和[bDeviceSubClass](#bdevicesubclass)的值限定。 101e41f4b71Sopenharmony_ci 102e41f4b71Sopenharmony_ci 103e41f4b71Sopenharmony_ci### bDeviceSubClass 104e41f4b71Sopenharmony_ci 105e41f4b71Sopenharmony_ci 106e41f4b71Sopenharmony_ci``` 107e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::bDeviceSubClass 108e41f4b71Sopenharmony_ci``` 109e41f4b71Sopenharmony_ci 110e41f4b71Sopenharmony_ci**描述:** 111e41f4b71Sopenharmony_ci 112e41f4b71Sopenharmony_ci由USB标准化组织（USB-IF）分配的子类代码，其值由[bDeviceClass](#bdeviceclass)的值限定。 113e41f4b71Sopenharmony_ci 114e41f4b71Sopenharmony_ci 115e41f4b71Sopenharmony_ci### bLength 116e41f4b71Sopenharmony_ci 117e41f4b71Sopenharmony_ci 118e41f4b71Sopenharmony_ci``` 119e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::bLength 120e41f4b71Sopenharmony_ci``` 121e41f4b71Sopenharmony_ci 122e41f4b71Sopenharmony_ci**描述:** 123e41f4b71Sopenharmony_ci 124e41f4b71Sopenharmony_ci该描述符的大小，单位为字节。 125e41f4b71Sopenharmony_ci 126e41f4b71Sopenharmony_ci 127e41f4b71Sopenharmony_ci### bMaxPacketSize0 128e41f4b71Sopenharmony_ci 129e41f4b71Sopenharmony_ci 130e41f4b71Sopenharmony_ci``` 131e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::bMaxPacketSize0 132e41f4b71Sopenharmony_ci``` 133e41f4b71Sopenharmony_ci 134e41f4b71Sopenharmony_ci**描述:** 135e41f4b71Sopenharmony_ci 136e41f4b71Sopenharmony_ci端点零的最大包大小，只有8、16、32、64是合法的。 137e41f4b71Sopenharmony_ci 138e41f4b71Sopenharmony_ci 139e41f4b71Sopenharmony_ci### bNumConfigurations 140e41f4b71Sopenharmony_ci 141e41f4b71Sopenharmony_ci 142e41f4b71Sopenharmony_ci``` 143e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::bNumConfigurations 144e41f4b71Sopenharmony_ci``` 145e41f4b71Sopenharmony_ci 146e41f4b71Sopenharmony_ci**描述:** 147e41f4b71Sopenharmony_ci 148e41f4b71Sopenharmony_ci配置数量。 149e41f4b71Sopenharmony_ci 150e41f4b71Sopenharmony_ci 151e41f4b71Sopenharmony_ci### idProduct 152e41f4b71Sopenharmony_ci 153e41f4b71Sopenharmony_ci 154e41f4b71Sopenharmony_ci``` 155e41f4b71Sopenharmony_ciuint16_t UsbDeviceDescriptor::idProduct 156e41f4b71Sopenharmony_ci``` 157e41f4b71Sopenharmony_ci 158e41f4b71Sopenharmony_ci**描述:** 159e41f4b71Sopenharmony_ci 160e41f4b71Sopenharmony_ci由厂商分配的产品编号。 161e41f4b71Sopenharmony_ci 162e41f4b71Sopenharmony_ci 163e41f4b71Sopenharmony_ci### idVendor 164e41f4b71Sopenharmony_ci 165e41f4b71Sopenharmony_ci 166e41f4b71Sopenharmony_ci``` 167e41f4b71Sopenharmony_ciuint16_t UsbDeviceDescriptor::idVendor 168e41f4b71Sopenharmony_ci``` 169e41f4b71Sopenharmony_ci 170e41f4b71Sopenharmony_ci**描述:** 171e41f4b71Sopenharmony_ci 172e41f4b71Sopenharmony_ci由USB标准化组织（USB-IF）分配的厂商编号。 173e41f4b71Sopenharmony_ci 174e41f4b71Sopenharmony_ci 175e41f4b71Sopenharmony_ci### iManufacturer 176e41f4b71Sopenharmony_ci 177e41f4b71Sopenharmony_ci 178e41f4b71Sopenharmony_ci``` 179e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::iManufacturer 180e41f4b71Sopenharmony_ci``` 181e41f4b71Sopenharmony_ci 182e41f4b71Sopenharmony_ci**描述:** 183e41f4b71Sopenharmony_ci 184e41f4b71Sopenharmony_ci描述厂商的字符串描述符的索引。 185e41f4b71Sopenharmony_ci 186e41f4b71Sopenharmony_ci 187e41f4b71Sopenharmony_ci### iProduct 188e41f4b71Sopenharmony_ci 189e41f4b71Sopenharmony_ci 190e41f4b71Sopenharmony_ci``` 191e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::iProduct 192e41f4b71Sopenharmony_ci``` 193e41f4b71Sopenharmony_ci 194e41f4b71Sopenharmony_ci**描述:** 195e41f4b71Sopenharmony_ci 196e41f4b71Sopenharmony_ci描述产品的字符串描述符的索引。 197e41f4b71Sopenharmony_ci 198e41f4b71Sopenharmony_ci 199e41f4b71Sopenharmony_ci### iSerialNumber 200e41f4b71Sopenharmony_ci 201e41f4b71Sopenharmony_ci 202e41f4b71Sopenharmony_ci``` 203e41f4b71Sopenharmony_ciuint8_t UsbDeviceDescriptor::iSerialNumber 204e41f4b71Sopenharmony_ci``` 205e41f4b71Sopenharmony_ci 206e41f4b71Sopenharmony_ci**描述:** 207e41f4b71Sopenharmony_ci 208e41f4b71Sopenharmony_ci描述设备序列号的字符串描述符的索引。 209