这一次使用 CH567 制作一个USB键盘，参考的对象是Dostyle 的MK60 机械键盘。
同样的，使用 USBlyzer 抓取描述符信息：
USB Composite Device
| Connection Status | Device connected |
| Current Configuration | 1 |
| Speed | Full (12 Mbit/s) |
| Device Address | 8 |
| Number Of Open Pipes | 2 |
Device Descriptor Gaming KB
| Offset | Field | Size | Value | Description |
| 0 | bLength | 1 | 12h | |
| 1 | bDescriptorType | 1 | 01h | Device |
| 2 | bcdUSB | 2 | 0110h | USB Spec 1.1 |
| 4 | bDeviceClass | 1 | 00h | Class info in Ifc Descriptors |
| 5 | bDeviceSubClass | 1 | 00h | |
| 6 | bDeviceProtocol | 1 | 00h | |
| 7 | bMaxPacketSize0 | 1 | 08h | 8 bytes |
| 8 | idVendor | 2 | 258Ah | |
| 10 | idProduct | 2 | 002Ah | |
| 12 | bcdDevice | 2 | 1201h | 12.01 |
| 14 | iManufacturer | 1 | 01h | "SINO WEALTH" |
| 15 | iProduct | 1 | 02h | "Gaming KB " |
| 16 | iSerialNumber | 1 | 00h | |
| 17 | bNumConfigurations | 1 | 01h |
Configuration Descriptor 1 Bus Powered, 500 mA
| Offset | Field | Size | Value | Description |
| 0 | bLength | 1 | 09h | |
| 1 | bDescriptorType | 1 | 02h | Configuration |
| 2 | wTotalLength | 2 | 003Bh | |
| 4 | bNumInterfaces | 1 | 02h | |
| 5 | bConfigurationValue | 1 | 01h | |
| 6 | iConfiguration | 1 | 00h | |
| 7 | bmAttributes | 1 | A0h | Bus Powered, Remote Wakeup |
| 4..0: Reserved | ...00000 | |||
| 5: Remote Wakeup | ..1..... | Yes | ||
| 6: Self Powered | .0...... | No, Bus Powered | ||
| 7: Reserved (set to one) (bus-powered for 1.0) | 1....... | |||
| 8 | bMaxPower | 1 | FAh | 500 mA |
Interface Descriptor 0/0 HID, 1 Endpoint
| Offset | Field | Size | Value | Description |
| 0 | bLength | 1 | 09h | |
| 1 | bDescriptorType | 1 | 04h | Interface |
| 2 | bInterfaceNumber | 1 | 00h | |
| 3 | bAlternateSetting | 1 | 00h | |
| 4 | bNumEndpoints | 1 | 01h | |
| 5 | bInterfaceClass | 1 | 03h | HID |
| 6 | bInterfaceSubClass | 1 | 01h | Boot Interface |
| 7 | bInterfaceProtocol | 1 | 01h | Keyboard |
| 8 | iInterface | 1 | 00h |
| Offset | Field | Size | Value | Description |
| 0 | bLength | 1 | 09h | |
| 1 | bDescriptorType | 1 | 21h | HID |
| 2 | bcdHID | 2 | 0111h | 1.11 |
| 4 | bCountryCode | 1 | 00h | |
| 5 | bNumDescriptors | 1 | 01h | |
| 6 | bDescriptorType | 1 | 22h | Report |
| 7 | wDescriptorLength | 2 | 0043h | 67 bytes |
Endpoint Descriptor 81 1 In, Interrupt, 1 ms
| Offset | Field | Size | Value | Description |
| 0 | bLength | 1 | 07h | |
| 1 | bDescriptorType | 1 | 05h | Endpoint |
| 2 | bEndpointAddress | 1 | 81h | 1 In |
| 3 | bmAttributes | 1 | 03h | Interrupt |
| 1..0: Transfer Type | ......11 | Interrupt | ||
| 7..2: Reserved | 000000.. | |||
| 4 | wMaxPacketSize | 2 | 0008h | 8 bytes |
| 6 | bInterval | 1 | 01h | 1 ms |
Interface Descriptor 1/0 HID, 1 Endpoint
| Offset | Field | Size | Value | Description |
| 0 | bLength | 1 | 09h | |
| 1 | bDescriptorType | 1 | 04h | Interface |
| 2 | bInterfaceNumber | 1 | 01h | |
| 3 | bAlternateSetting | 1 | 00h | |
| 4 | bNumEndpoints | 1 | 01h | |
| 5 | bInterfaceClass | 1 | 03h | HID |
| 6 | bInterfaceSubClass | 1 | 00h | |
| 7 | bInterfaceProtocol | 1 | 00h | |
| 8 | iInterface | 1 | 00h |
| Offset | Field | Size | Value | Description |
| 0 | bLength | 1 | 09h | |
| 1 | bDescriptorType | 1 | 21h | HID |
| 2 | bcdHID | 2 | 0111h | 1.11 |
| 4 | bCountryCode | 1 | 00h | |
| 5 | bNumDescriptors | 1 | 01h | |
| 6 | bDescriptorType | 1 | 22h | Report |
| 7 | wDescriptorLength | 2 | 00CCh | 204 bytes |
Endpoint Descriptor 82 2 In, Interrupt, 1 ms
| Offset | Field | Size | Value | Description |
| 0 | bLength | 1 | 07h | |
| 1 | bDescriptorType | 1 | 05h | Endpoint |
| 2 | bEndpointAddress | 1 | 82h | 2 In |
| 3 | bmAttributes | 1 | 03h | Interrupt |
| 1..0: Transfer Type | ......11 | Interrupt | ||
| 7..2: Reserved | 000000.. | |||
| 4 | wMaxPacketSize | 2 | 0010h | 16 bytes |
| 6 | bInterval | 1 | 01h | 1 ms |
Interface 0 HID Report Descriptor Keyboard
| Item Tag (Value) | Raw Data |
| Usage Page (Generic Desktop) | 05 01 |
| Usage (Keyboard) | 09 06 |
| Collection (Application) | A1 01 |
| Usage Page (Keyboard/Keypad) | 05 07 |
| Usage Minimum (Keyboard Left Control) | 19 E0 |
| Usage Maximum (Keyboard Right GUI) | 29 E7 |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (1) | 25 01 |
| Report Count (8) | 95 08 |
| Report Size (1) | 75 01 |
| Input (Data,Var,Abs,NWrp,Lin,Pref,NNul,Bit) | 81 02 |
| Report Count (1) | 95 01 |
| Report Size (8) | 75 08 |
| Input (Cnst,Var,Abs,NWrp,Lin,Pref,NNul,Bit) | 81 03 |
| Report Count (6) | 95 06 |
| Report Size (8) | 75 08 |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (255) | 26 FF 00 |
| Usage Page (Keyboard/Keypad) | 05 07 |
| Usage Minimum (Undefined) | 19 00 |
| Usage Maximum | 2A FF 00 |
| Input (Data,Ary,Abs) | 81 00 |
| Logical Maximum (1) | 25 01 |
| Report Count (5) | 95 05 |
| Report Size (1) | 75 01 |
| Usage Page (LEDs) | 05 08 |
| Usage Minimum (Num Lock) | 19 01 |
| Usage Maximum (Kana) | 29 05 |
| Output (Data,Var,Abs,NWrp,Lin,Pref,NNul,NVol,Bit) | 91 02 |
| Report Count (1) | 95 01 |
| Report Size (3) | 75 03 |
| Output (Cnst,Var,Abs,NWrp,Lin,Pref,NNul,NVol,Bit) | 91 03 |
| End Collection | C0 |
Interface 1 HID Report Descriptor System Control
| Item Tag (Value) | Raw Data |
| Usage Page (Generic Desktop) | 05 01 |
| Usage (System Control) | 09 80 |
| Collection (Application) | A1 01 |
| Report ID (1) | 85 01 |
| Usage Minimum (System Power Down) | 19 81 |
| Usage Maximum (System Wake Up) | 29 83 |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (1) | 25 01 |
| Report Size (1) | 75 01 |
| Report Count (3) | 95 03 |
| Input (Data,Var,Abs,NWrp,Lin,Pref,NNul,Bit) | 81 02 |
| Report Count (5) | 95 05 |
| Input (Cnst,Ary,Abs) | 81 01 |
| End Collection | C0 |
| Usage Page (Consumer Devices) | 05 0C |
| Usage (Consumer Control) | 09 01 |
| Collection (Application) | A1 01 |
| Report ID (2) | 85 02 |
| Usage Minimum (Undefined) | 19 00 |
| Usage Maximum (AC Format) | 2A 3C 02 |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (572) | 26 3C 02 |
| Report Count (1) | 95 01 |
| Report Size (16) | 75 10 |
| Input (Data,Ary,Abs) | 81 00 |
| End Collection | C0 |
| Usage Page (Vendor-Defined 1) | 06 00 FF |
| Usage (Vendor-Defined 1) | 09 01 |
| Collection (Application) | A1 01 |
| Report ID (5) | 85 05 |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (255) | 26 FF 00 |
| Usage Minimum (Vendor-Defined 1) | 19 01 |
| Usage Maximum (Vendor-Defined 2) | 29 02 |
| Report Size (8) | 75 08 |
| Report Count (5) | 95 05 |
| Feature (Data,Var,Abs,NWrp,Lin,Pref,NNul,NVol,Bit) | B1 02 |
| End Collection | C0 |
| Usage Page (Generic Desktop) | 05 01 |
| Usage (Keyboard) | 09 06 |
| Collection (Application) | A1 01 |
| Report ID (6) | 85 06 |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (1) | 25 01 |
| Report Size (1) | 75 01 |
| Report Count (112) | 95 70 |
| Usage Page (Keyboard/Keypad) | 05 07 |
| Usage Minimum (Keyboard Left Control) | 19 E0 |
| Usage Maximum (Keyboard Right GUI) | 29 E7 |
| Usage Minimum (Undefined) | 19 00 |
| Usage Maximum (Keypad =) | 29 67 |
| Input (Data,Var,Abs,NWrp,Lin,Pref,NNul,Bit) | 81 02 |
| Report Count (8) | 95 08 |
| Input (Cnst,Ary,Abs) | 81 01 |
| End Collection | C0 |
| Usage Page (Vendor-Defined 1) | 06 00 FF |
| Usage (Vendor-Defined 1) | 09 01 |
| Collection (Application) | A1 01 |
| Report ID (9) | 85 09 |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (255) | 26 FF 00 |
| Usage (Undefined) | 09 00 |
| Report Size (8) | 75 08 |
| Report Count (504) | 96 F8 01 |
| Feature (Data,Var,Abs,NWrp,Lin,Pref,NNul,NVol,Bit) | B1 02 |
| End Collection | C0 |
| Usage Page (Vendor-Defined 1) | 06 00 FF |
| Usage (Vendor-Defined 1) | 09 01 |
| Collection (Application) | A1 01 |
| Report ID (10) | 85 0A |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (255) | 26 FF 00 |
| Usage (Undefined) | 09 00 |
| Report Size (8) | 75 08 |
| Report Count (41) | 95 29 |
| Feature (Data,Var,Abs,NWrp,Lin,Pref,NNul,NVol,Bit) | B1 02 |
| End Collection | C0 |
| Usage Page (Vendor-Defined 1) | 06 00 FF |
| Usage (Vendor-Defined 1) | 09 01 |
| Collection (Application) | A1 01 |
| Report ID (11) | 85 0B |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (255) | 26 FF 00 |
| Usage (Undefined) | 09 00 |
| Report Size (8) | 75 08 |
| Report Count (126) | 95 7E |
| Feature (Data,Var,Abs,NWrp,Lin,Pref,NNul,NVol,Bit) | B1 02 |
| End Collection | C0 |
| Usage Page (Vendor-Defined 1) | 06 00 FF |
| Usage (Vendor-Defined 1) | 09 01 |
| Collection (Application) | A1 01 |
| Report ID (12) | 85 0C |
| Logical Minimum (0) | 15 00 |
| Logical Maximum (255) | 26 FF 00 |
| Usage (Undefined) | 09 00 |
| Report Size (8) | 75 08 |
| Report Count (1920) | 96 80 07 |
| Feature (Data,Var,Abs,NWrp,Lin,Pref,NNul,NVol,Bit) | B1 02 |
| End Collection | C0 |
This report was generated by USBlyzer
需要特别注意的是：这个设备是 USB Full Speed(12Mbits/s)的，必须在文件头部设置为 Full Speed，如果继续使用 Low Speed，插入之后读取描述符后 Host就会停止继续发送数据（Windows 行为，我不知道原因）。
除此之外，和之前的鼠标代码相比还增加了一个HID 描述符，另外，在 Main 中定时发送打开Windows 菜单（Win按键）。