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AN1325

APPLICATION NOTE

USING THE ST7 USB LOW-SPEED LIBRARY V4.2x

by Microcontroller Division Applications

This application note describes how to use the ST7 USB Low-Speed Library V4.2x. Starting

from version 4.20 the Library supports the DFU class layer.

Caution: The DFU class and the HID class layers are not included in the Library. The Library

contains only the standard USB request layers. You will find the DFU and HID layers in the

ST7 USB Low-Speed DFU EvalKit firmware.

Note: In this document the names “Hiware” and “MetroWerks” refer to the same compiler

manufacturer.

1 OVERVIEW

The ST7 USB Low-Speed Firmware Library is written in C language and is compatible with

both Cosmic and Metrowerks compilers.

This Library provides a complete USB protocol layer for the ST7 USB Low-Speed microcon-

trollers (such as the ST7261, ST7262, ST7263 and ST7263B). The source code is available

free to STMicroelectronics customers.

This Library is supplied in a ZIP file. Starting from version 4.10, the Library contains only the

files that are common for all the projects. This new architecture has been choosen in order to

better separate what is really the Library and what is related to a project. This architecture will

also facilitate the upgrade of different projects with new Library versions in the future.

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