include/AVR/timerscfg.h
author edouard
Tue, 06 Oct 2009 17:15:32 +0200
changeset 601 efb6e88ad27f
parent 375 03fb0bfccc1f
permissions -rw-r--r--
Fixed bug in the AVR-CAN driver: the CAN interrupt changes the
selected message object, but does not revert it before exiting.
375
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/*
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This file is part of CanFestival, a library implementing CanOpen Stack.
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Copyright (C): Edouard TISSERANT and Francis DUPIN
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AVR Port: Andreas GLAUSER and Peter CHRISTEN
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See COPYING file for copyrights details.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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*/
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#ifndef __TIMERSCFG_H__
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#define __TIMERSCFG_H__
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// Whatever your microcontroller, the timer wont work if
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// TIMEVAL is not at least on 32 bits
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#define TIMEVAL UNS32
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// The timer of the AVR counts from 0000 to 0xFFFF in CTC mode (it can be
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// shortened setting OCR3A eg. to get 2ms instead of 2.048ms)
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#define TIMEVAL_MAX 0xFFFF
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// The timer is incrementing every 4 us.
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//#define MS_TO_TIMEVAL(ms) (ms * 250)
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//#define US_TO_TIMEVAL(us) (us>>2)
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// The timer is incrementing every 8 us.
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#define MS_TO_TIMEVAL(ms) ((ms) * 125)
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#define US_TO_TIMEVAL(us) ((us)>>3)
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#endif