98 lines
3.8 KiB
C
98 lines
3.8 KiB
C
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/************************************************************
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* clock_internal.h
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************/
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#ifndef __CLOCK_INTERNAL_H
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#define __CLOCK_INTERNAL_H
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/************************************************************
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* Included Files
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************************************************************/
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#include <sys/types.h>
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#include <nuttx/compiler.h>
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/************************************************************
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* Definitions
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************************************************************/
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/* Timing constants */
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#define NSEC_PER_SEC 1000000000
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#define USEC_PER_SEC 1000000
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#define MSEC_PER_SEC 1000
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#define NSEC_PER_MSEC 1000000
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#define USEC_PER_MSEC 1000
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#define NSEC_PER_USEC 1000
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#define MSEC_PER_TICK 10
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#define USEC_PER_TICK (MSEC_PER_TICK * USEC_PER_MSEC)
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#define NSEC_PER_TICK (MSEC_PER_TICK * NSEC_PER_MSEC)
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#define TICK_PER_SEC (MSEC_PER_SEC / MSEC_PER_TICK)
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#define MSEC2TICK(msec) (((msec)+(MSEC_PER_TICK/2))/MSEC_PER_TICK)
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#define USEC2TICK(usec) (((usec)+(USEC_PER_TICK/2))/USEC_PER_TICK)
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#define JD_OF_EPOCH 2440588 /* Julian Date of noon, J1970 */
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#ifdef CONFIG_JULIAN_TIME
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# define GREG_DUTC -141427 /* Default is October 15, 1582 */
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# define GREG_YEAR 1582
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# define GREG_MONTH 10
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# define GREG_DAY 15
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#endif /* CONFIG_JULIAN_TIME */
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/************************************************************
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* Public Type Definitions
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************************************************************/
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/************************************************************
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* Global Variables
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************************************************************/
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extern volatile uint32 g_system_timer;
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extern struct timespec g_basetime;
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extern uint32 g_tickbias;
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/************************************************************
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* Public Function Prototypes
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************************************************************/
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extern void weak_function clock_initialize(void);
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extern void weak_function clock_timer(void);
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extern time_t clock_calendar2utc(int year, int month, int day);
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#endif /* __CLOCK_INTERNAL_H */
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