GigaDevice Semiconductor GD32 Series, User Manual

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AN050
GD32 USBFS&USBHS Firmware Library User Guide
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5.7.5.
HID
HID device class is implement human-machine interaction interface, HID device has a wide
usage range, not only include mouse, keyboard and touch device, but also include customed
HID device.
HID descriptor introduction
Device descriptor include HID device VID(0x28e9) and PID(0x0380). In HID configuration
descriptor set, include HID descriptor item and report descriptor, corresponding descriptor is
shown as
Table 5-19. HID relevant descriptors .
Table 5-19
. HID relevant descriptors
Descriptor name Functional description
hid_vendor HID descriptor
hid_report_desc report descriptor
HID device class interface
HID device class interface is shown in below structure, and structure function is shown in
below
Table 5-20. HID device class interface functions .
usb_class_core usbd_hid_cb = {
. command = NO_CMD ,
. alter_set = 0U ,
. init = hid_init ,
. deinit = hid_deinit ,
. req_proc = hid_req ,
. data_in = hid_data_in
};
Table 5-20
. HID device class interface functions
Function name Functional description
hid_init Initialize HID device
hid_deinit Deinitialize HID device
hid_req HID device class request function
hid_data_in IN data transfer callback
HID device class request
HID include device class request is shown in Table 5-21. HID device class request .
Table 5-21
. HID device class request
Request name value Functional description
GET_REPORT 0x01 Get report
GET_IDLE 0x02 Get idle