94 lines
3.6 KiB
C
94 lines
3.6 KiB
C
/*----------------------------------------------------------------------------
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* RL-ARM - RTX
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*----------------------------------------------------------------------------
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* Name: RT_TIME.C
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* Purpose: Delay and interval wait functions
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* Rev.: V4.60
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*----------------------------------------------------------------------------
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*
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* Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
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* All rights reserved.
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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 are met:
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* - 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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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* - Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN 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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#include "rt_TypeDef.h"
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#include "RTX_Config.h"
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#include "rt_Task.h"
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#include "rt_Time.h"
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/*----------------------------------------------------------------------------
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* Global Variables
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*---------------------------------------------------------------------------*/
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/* Free running system tick counter */
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U32 os_time;
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/*----------------------------------------------------------------------------
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* Functions
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*---------------------------------------------------------------------------*/
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/*--------------------------- rt_time_get -----------------------------------*/
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U32 rt_time_get (void) {
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/* Get system time tick */
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return (os_time);
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}
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/*--------------------------- rt_dly_wait -----------------------------------*/
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void rt_dly_wait (U16 delay_time) {
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/* Delay task by "delay_time" */
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rt_block (delay_time, WAIT_DLY);
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}
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/*--------------------------- rt_itv_set ------------------------------------*/
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void rt_itv_set (U16 interval_time) {
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/* Set interval length and define start of first interval */
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os_tsk.run->interval_time = interval_time;
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os_tsk.run->delta_time = interval_time + (U16)os_time;
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}
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/*--------------------------- rt_itv_wait -----------------------------------*/
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void rt_itv_wait (void) {
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/* Wait for interval end and define start of next one */
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U16 delta;
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delta = os_tsk.run->delta_time - (U16)os_time;
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os_tsk.run->delta_time += os_tsk.run->interval_time;
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if ((delta & 0x8000) == 0) {
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rt_block (delta, WAIT_ITV);
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}
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}
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/*----------------------------------------------------------------------------
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* end of file
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*---------------------------------------------------------------------------*/
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