UM1021 - STMicroelectronics

UM1021 USB device library

HID class implementation

●

●

●

●

●

This module manages the MSC class V1.11 following the “Device Class Definition for

Human Interface Devices (HID) Version 1.11 June 27, 2001". This driver implements the following aspects of the specification:

The boot interface subclass

The mouse protocol

Usage page: generic desktop

Usage: joystick

Collection: application

HID user interface

The USBD_HID_SendReport can be used by the application to send HID reports, the HID driver, in this release, handles only IN traffic. An example of use of this function is shown below: static uint8_t HID_Buffer [4];

USBD_HID_SendReport (&USB_OTG_FS_dev,

USBD_HID_GetPos(),

4); static uint8_t *USBD_HID_GetPos (void)

{

HID_Buffer[0] = 0;

HID_Buffer[1] = GetXPos();;

HID_Buffer[2] = GetXPos();

HID_Buffer[3] = 0; return HID_Buffer;

}

HID core files

Table 10.

usbd_hid_core.c,h files

Functions Description

static uint8_t USBD_HID_Init

(void *pdev, uint8_t cfgidx) static uint8_t USBD_HID_DeInit

(void *pdev, uint8_t cfgidx)

Initializes the HID interface and open the used endpoints.

Un-Initializes the HID layer and close the used endpoints.

static uint8_t USBD_HID_Setup (void

*pdev, USB_SETUP_REQ *req)

Handles the HID specific requests.

uint8_t USBD_HID_SendReport

(USB_OTG_CORE_HANDLE *pdev, uint8_t

*report, uint16_t len)

Sends HID reports.

Doc ID 18153 Rev 3 39/107