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device bus speed 指的参数是什么？？？？
usb 的调试工具提示：device bus speed：full
可是我把连接的设备设置成了high speed，为什么这里还是full 呢？ 请达人详解！！ 具体参数如下： Device Descriptor: bcdUSB: 0x0200 bDeviceClass: 0x00 bDeviceSubClass: 0x00 bDeviceProtocol: 0x00 bMaxPacketSize0: 0x40 (64) idVendor: 0x090C idProduct: 0x1000 bcdDevice: 0x1100 iManufacturer: 0x01 iProduct: 0x02 iSerialNumber: 0x03 bNumConfigurations: 0x01 ConnectionStatus: DeviceConnected Current Config Value: 0x01 Device Bus Speed: Full Device Address: 0x01 Open Pipes: 2 Endpoint Descriptor: bEndpointAddress: 0x81 Transfer Type: Bulk wMaxPacketSize: 0x0200 (512) bInterval: 0xFF Endpoint Descriptor: bEndpointAddress: 0x02 Transfer Type: Bulk wMaxPacketSize: 0x0200 (512) bInterval: 0xFF |
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