105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/****************************************************************************
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* sched/clock_systimer.c
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*
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* Copyright (C) 2011 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 NuttX 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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <nuttx/clock.h>
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#include <nuttx/rtc.h>
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#include <nuttx/time.h>
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#if !defined(clock_systimer) /* See nuttx/clock.h */
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: clock_systimer
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*
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* Description:
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* Return the current value of the system timer counter
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*
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* Parameters:
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* None
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*
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* Return Value:
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* The current value of the system timer counter
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*
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* Assumptions:
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*
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****************************************************************************/
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uint32_t clock_systimer(void)
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{
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/* Fetch the g_system_timer value from timer hardware, if available */
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#ifdef CONFIG_RTC
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/* Check if the periodic timer is initialized
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*
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* Note that the unit of the g_system_timer and and up_rtc_getclock() do
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* not have the same unit.
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*/
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if (g_rtc_enabled)
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{
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// return up_rtc_getclock();
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}
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#endif
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#ifndef CONFIG_SYSTEM_UTC
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return g_system_timer;
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#else
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return g_system_utc * TICK_PER_SEC + g_tickcount;
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#endif
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}
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#endif /* !clock_systtimer */
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