我兴高采烈的买了个新的WCH-LINK 1V3回来盼着用USB高速调试，结果插上电脑用USBView检查了下发现是个全速设备。细读了一下说明似乎只提到了USB转JTAG功能用的是USB2.0高速接口。
USBView读到的USB信息：
[Port10] : USB Composite Device
Is Port User Connectable: yes
Is Port Debug Capable: no
Companion Port Number: 0
Companion Hub Symbolic Link Name:
Protocols Supported:
USB 1.1: yes
USB 2.0: yes
USB 3.0: no
Device Power State: PowerDeviceD0
---===>Device Information<===---
English product name: "WCH-Link"
ConnectionStatus:
Current Config Value: 0x01 -> Device Bus Speed: Full (is not SuperSpeed or higher capable)
Device Address: 0x05
Open Pipes: 7
===>Device Descriptor<===
bLength: 0x12
bDescriptorType: 0x01
bcdUSB: 0x0110
bDeviceClass: 0xEF -> This is a Multi-interface Function Code Device
bDeviceSubClass: 0x02 -> This is the Common Class Sub Class
bDeviceProtocol: 0x01 -> This is the Interface Association Descriptor protocol
bMaxPacketSize0: 0x40 = (64) Bytes
idVendor: 0x1A86 = Nanjing Qinherg Electronics Co., Ltd.
idProduct: 0x8010
bcdDevice: 0x0211
iManufacturer: 0x01
English (United States) "wch.cn"
iProduct: 0x02
English (United States) "WCH-Link"
iSerialNumber: 0x03
English (United States) "XXXXXXXXXXXXXXX"
bNumConfigurations: 0x01
---===>Open Pipes<===---
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x82 -> Direction: IN - EndpointID: 2
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x02 -> Direction: OUT - EndpointID: 2
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x81 -> Direction: IN - EndpointID: 1
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x01 -> Direction: OUT - EndpointID: 1
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x84 -> Direction: IN - EndpointID: 4
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x01
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x83 -> Direction: IN - EndpointID: 3
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x03 -> Direction: OUT - EndpointID: 3
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
---===>Full Configuration Descriptor<===---
===>Configuration Descriptor<===
bLength: 0x09
bDescriptorType: 0x02
wTotalLength: 0x0078 -> Validated
bNumInterfaces: 0x03
bConfigurationValue: 0x01
iConfiguration: 0x00
bmAttributes: 0x80 -> Bus Powered
MaxPower: 0x32 = 100 mA
===>IAD Descriptor<===
bLength: 0x08
bDescriptorType: 0x0B
bFirstInterface: 0x00
bInterfaceCount: 0x01
*!*ERROR: bInterfaceCount must be greater than 1
bFunctionClass: 0xFF -> Interface Class Unknown to USBView
bFunctionSubClass: 0x00
bFunctionProtocol: 0x00
iFunction: 0x02
English (United States) "WCH-Link"
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x00
bAlternateSetting: 0x00
bNumEndpoints: 0x04
bInterfaceClass: 0xFF -> Interface Class Unknown to USBView
bInterfaceSubClass: 0x80
bInterfaceProtocol: 0x55
iInterface: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x82 -> Direction: IN - EndpointID: 2
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x02 -> Direction: OUT - EndpointID: 2
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x81 -> Direction: IN - EndpointID: 1
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x01 -> Direction: OUT - EndpointID: 1
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>IAD Descriptor<===
bLength: 0x08
bDescriptorType: 0x0B
bFirstInterface: 0x01
bInterfaceCount: 0x02
bFunctionClass: 0x02 -> This is Communications (CDC Control) USB Device Interface Class
bFunctionSubClass: 0x02
bFunctionProtocol: 0x01
iFunction: 0x04
English (United States) "WCH-Link"
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x01
bAlternateSetting: 0x00
bNumEndpoints: 0x01
bInterfaceClass: 0x02 -> This is Communications (CDC Control) USB Device Interface Class
bInterfaceSubClass: 0x02
bInterfaceProtocol: 0x01
iInterface: 0x00
-> This is a Communications (CDC Control) USB Device Interface Class
===>Descriptor Hex Dump<===
bLength: 0x05
bDescriptorType: 0x24
05 24 00 10 01
-> This is a Communications (CDC Control) USB Device Interface Class
===>Descriptor Hex Dump<===
bLength: 0x05
bDescriptorType: 0x24
05 24 01 00 01
-> This is a Communications (CDC Control) USB Device Interface Class
===>Descriptor Hex Dump<===
bLength: 0x04
bDescriptorType: 0x24
04 24 02 02
-> This is a Communications (CDC Control) USB Device Interface Class
===>Descriptor Hex Dump<===
bLength: 0x05
bDescriptorType: 0x24
05 24 06 01 02
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x84 -> Direction: IN - EndpointID: 4
bmAttributes: 0x03 -> Interrupt Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x01
===>Interface Descriptor<===
bLength: 0x09
bDescriptorType: 0x04
bInterfaceNumber: 0x02
bAlternateSetting: 0x00
bNumEndpoints: 0x02
bInterfaceClass: 0x0A -> This is a CDC Data USB Device Interface Class
bInterfaceSubClass: 0x00
bInterfaceProtocol: 0x00
iInterface: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x83 -> Direction: IN - EndpointID: 3
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00
===>Endpoint Descriptor<===
bLength: 0x07
bDescriptorType: 0x05
bEndpointAddress: 0x03 -> Direction: OUT - EndpointID: 3
bmAttributes: 0x02 -> Bulk Transfer Type
wMaxPacketSize: 0x0040 = 0x40 bytes
bInterval: 0x00