UM0290 datasheet(24/76 Pages) STMICROELECTRONICS

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Custom HID

UM0290

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Custom HID

3.1

General description

The HID (human interface device) class primarily consists of devices that are used by

humans to control the operation of computer systems. Typical examples of HID class

devices are standard mouse devices, keyboards, Bluetooth adaptors etc.

For more details on the HID device class, please refer to the “Device Class Definition for HID

1.11” available from the usb.org website.

The custom HID demo is a simple HID demo provided with a small PC applet to give an

example of how to create a customized HID based on the native Windows HID driver. It

consists of simple data exchanges between the STR7xx/STR91x evaluation boards and the

PC Host using two interrupt pipes (IN and OUT).

The exchanged data are related to LED commands, push-button state reports and ADC

conversion values.

For more details on how to use the PC applet of the custom HID, please refer to the

UM0551user manual “USB HID demonstrator” available from the STMicroelectronics

microcontroller website www.st.com.

3.2

Descriptor topology

The custom HID topology is based on two interrupt pipes used to handle the data transfer

for seven different reports. The following chart shows the custom HID topology.

Figure 3.

Custom HID topology

Device

descriptor

Configuration

descriptor

Interface

descriptor

Endpoint 1 OUT

descriptor

Endpoint 1 IN

descriptor

HID

descriptor

Report

descriptors (6)

UM0290 Datasheet(PDF) 24 Page - STMicroelectronics