pinebuds/rtos/rtx/TARGET_CORTEX_M/rt_Time.c

95 lines
3.6 KiB
C

/*----------------------------------------------------------------------------
* RL-ARM - RTX
*----------------------------------------------------------------------------
* Name: RT_TIME.C
* Purpose: Delay and interval wait functions
* Rev.: V4.60
*----------------------------------------------------------------------------
*
* Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - Neither the name of ARM 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 COPYRIGHT HOLDERS AND 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.
*---------------------------------------------------------------------------*/
#include "rt_TypeDef.h"
#include "RTX_Conf.h"
#include "rt_Task.h"
#include "rt_Time.h"
/*----------------------------------------------------------------------------
* Global Variables
*---------------------------------------------------------------------------*/
/* Free running system tick counter */
U32 os_time;
/*----------------------------------------------------------------------------
* Functions
*---------------------------------------------------------------------------*/
/*--------------------------- rt_time_get -----------------------------------*/
U32 rt_time_get (void) {
/* Get system time tick */
return (os_time);
}
/*--------------------------- rt_dly_wait -----------------------------------*/
void rt_dly_wait (U16 delay_time) {
/* Delay task by "delay_time" */
rt_block (delay_time, WAIT_DLY);
}
/*--------------------------- rt_itv_set ------------------------------------*/
void rt_itv_set (U16 interval_time) {
/* Set interval length and define start of first interval */
os_tsk.run->interval_time = interval_time;
os_tsk.run->delta_time = interval_time + (U16)os_time;
}
/*--------------------------- rt_itv_wait -----------------------------------*/
void rt_itv_wait (void) {
/* Wait for interval end and define start of next one */
U16 delta;
delta = os_tsk.run->delta_time - (U16)os_time;
os_tsk.run->delta_time += os_tsk.run->interval_time;
if ((delta & 0x8000) == 0) {
rt_block (delta, WAIT_ITV);
}
}
/*----------------------------------------------------------------------------
* end of file
*---------------------------------------------------------------------------*/