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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-02-17 23:21:28 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-02-17 23:21:28 +0000 |
commit | e3940eb2080711edac189cca3f642ee89dc215f2 (patch) | |
tree | 1c390958fae49e34dce698b175487e6d4681e540 /nuttx/sched/clock_internal.h | |
parent | 2223612deb2cc6322992f8595b6d6f86fcb53ae1 (diff) | |
download | px4-nuttx-e3940eb2080711edac189cca3f642ee89dc215f2.tar.gz px4-nuttx-e3940eb2080711edac189cca3f642ee89dc215f2.tar.bz2 px4-nuttx-e3940eb2080711edac189cca3f642ee89dc215f2.zip |
NuttX RTOS
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/sched/clock_internal.h')
-rw-r--r-- | nuttx/sched/clock_internal.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/nuttx/sched/clock_internal.h b/nuttx/sched/clock_internal.h new file mode 100644 index 000000000..18806d952 --- /dev/null +++ b/nuttx/sched/clock_internal.h @@ -0,0 +1,101 @@ +/************************************************************ + * clock_internal.h + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name Gregory Nutt nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************/ + +#ifndef __CLOCK_INTERNAL_H +#define __CLOCK_INTERNAL_H + +/************************************************************ + * Included Files + ************************************************************/ + +#include <sys/types.h> +#include <nuttx/compiler.h> + +/************************************************************ + * Definitions + ************************************************************/ + +/* Timing constants */ + +#define NSEC_PER_SEC 1000000000 +#define USEC_PER_SEC 1000000 +#define MSEC_PER_SEC 1000 +#define NSEC_PER_MSEC 1000000 +#define USEC_PER_MSEC 1000 +#define NSEC_PER_USEC 1000 + +#define MSEC_PER_TICK 10 +#define USEC_PER_TICK (MSEC_PER_TICK * USEC_PER_MSEC) +#define NSEC_PER_TICK (MSEC_PER_TICK * NSEC_PER_MSEC) +#define TICK_PER_SEC (MSEC_PER_SEC / MSEC_PER_TICK) + +#define MSEC2TICK(msec) (((msec)+(MSEC_PER_TICK/2))/MSEC_PER_TICK) +#define USEC2TICK(usec) (((usec)+(USEC_PER_TICK/2))/USEC_PER_TICK) + +#define JD_OF_EPOCH 2440588 /* Julian Date of noon, J1970 */ + +#ifdef CONFIG_JULIAN_TIME +# define GREG_DUTC -141427 /* Default is October 15, 1582 */ +# define GREG_YEAR 1582 +# define GREG_MONTH 10 +# define GREG_DAY 15 +#endif /* CONFIG_JULIAN_TIME */ + +/************************************************************ + * Public Type Definitions + ************************************************************/ + +/************************************************************ + * Global Variables + ************************************************************/ + +extern volatile uint32 g_system_timer; +extern struct timespec g_basetime; +extern uint32 g_tickbias; + +/************************************************************ + * Public Inline Functions + ************************************************************/ + +/************************************************************ + * Public Function Prototypes + ************************************************************/ + +extern void weak_function clock_initialize(void); +extern void weak_function clock_timer(void); + +extern time_t clock_calendar2utc(int year, int month, int day); + +#endif /* __CLOCK_INTERNAL_H */ |