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Initial import of support files for all Digistump boards - Digispark, Pro, DigiX - including libraries, examples, tools, and other support files for the Arduino IDE

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Erik Tylek Kettenburg
2014-12-19 08:45:50 -08:00
parent 97abdbf157
commit 7e7473a2d6
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hardware/digistump/avr/libraries/DigiCDC/libs-device/Readme.txt Normal file
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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+.
----------------------------------------------------------------------------
(c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH.
http://www.obdev.at/