trong file usbd_custom_hid_if.c có cái biến:

__ALIGN_BEGIN static uint8_t CUSTOM_HID_ReportDesc_FS[USBD_CUSTOM_HID_REPORT_DESC_SIZE] __ALIGN_END =

{

    /* USER CODE BEGIN 0 */ 

0x06, 0x00, 0xFF, // Usage Page = 0xFF00 (Vendor Defined Page 1)

0x09, 0x01, // Usage (Vendor Usage 1)

0xA1, 0x01, // Collection (Application)

// Input report

0x19, 0x01, // Usage Minimum

0x29, 0x40, // Usage Maximum

0x15, 0x00, // Logical Minimum (data bytes in the report may have minimum value = 0x00)

0x26, 0xFF, 0x00, // Logical Maximum (data bytes in the report may have maximum value = 0x00FF = unsigned 255)

0x75, 0x08, // Report Size: 8-bit field size

0x95, CUSTOM_HID_EPIN_SIZE,// Report Count

0x81, 0x02, // Input (Data, Array, Abs)

// Output report

0x19, 0x01, // Usage Minimum

0x29, 0x40, // Usage Maximum

0x75, 0x08, // Report Size: 8-bit field size

0x95, CUSTOM_HID_EPOUT_SIZE,// Report Count

0x91, 0x02, // Output (Data, Array, Abs)

0xC0

};

không biết là bạn tham chiếu từ đâu để có các số liệu này.