This is the Readme file for the libs-device directory. This directory contains
code snippets which may be useful for USB device firmware.
WHAT IS INCLUDED IN THIS DIRECTORY?
===================================
osccal.c and osccal.h
This module contains a function which calibrates the AVR's built-in RC
oscillator based on the USB frame clock. See osccal.h for a documentation
of the API.
osctune.h
This header file contains a code snippet for usbconfig.h. With this code,
you can keep the AVR's internal RC oscillator in sync with the USB frame
clock. This is a continuous synchronization, not a single calibration at
USB reset as with osccal.c above. Please note that this code works only
if D- is wired to the interrupt, not D+.
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(c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH.
http://www.obdev.at/
