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