AN249 Silicon_Laboratories, AN249 Datasheet

AN249

Manufacturer Part Number

AN249

Description

Human Interface Device Tutorial

Manufacturer

Silicon_Laboratories

Datasheet

1.AN249.pdf (42 pages)

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Relevant Devices

This application note applies to the following devices:

All Silicon Labs USB MCUs.

1. Introduction

The Human Interface Device (HID) class specification allows designers to create USB-based devices and

applications without the need for custom driver development. Their high levels of on-chip integration and robust

USB interface make Silicon Laboratories microcontrollers ideal devices for HID designs.

1.1. About this Document

This application note assumes that the reader has a basic understanding of the USB specification, including some

knowledge of endpoints, descriptors, and transfer protocols. This document concentrates on highlighting the

benefits of designing with HID and techniques for creating and optimizing HID-based systems that use Silicon

Laboratories microcontrollers.

This document includes the following:

1.2. HID Examples

Both HID examples in this application note were created using the included firmware template as a starting point.

The sections titled "7. USB Mouse Example" on page 26 and "8. HID Blinky Firmware and Software Example" on

page 33 describe how the firmware template was modified to create each example. Section “8. HID Blinky

Firmware and Software Example”

communicate with an HID device.

Rev. 0.2 11/06

U M A N

Discussion on HID

A firmware template that can be used as a starting point for HID device firmware

Description of the HID object class that can be used by host applications to communicate with HID devices

Explanation of two example HID firmware systems implemented by modifying the Template Firmware

Firmware source for each HID example discussed in the text

Example code for host-side application software

N T E R F A C E

also provides an example of how the HID class object can be used to

E V I C E

U T O R I A L

AN249

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