105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/*
|
|
* File : cputime.h
|
|
* This file is part of RT-Thread RTOS
|
|
* COPYRIGHT (C) 2017, RT-Thread Development Team
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2017-12-23 Bernard first version
|
|
*/
|
|
|
|
#include <rtdevice.h>
|
|
#include <rtthread.h>
|
|
|
|
static const struct rt_clock_cputime_ops *_cputime_ops = RT_NULL;
|
|
|
|
/**
|
|
* The clock_cpu_getres() function shall return the resolution of CPU time, the
|
|
* number of nanosecond per tick.
|
|
*
|
|
* @return the number of nanosecond per tick
|
|
*/
|
|
float clock_cpu_getres(void)
|
|
{
|
|
if (_cputime_ops)
|
|
return _cputime_ops->cputime_getres();
|
|
|
|
rt_set_errno(-ENOSYS);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* The clock_cpu_gettime() function shall return the current value of cpu time tick.
|
|
*
|
|
* @return the cpu tick
|
|
*/
|
|
uint32_t clock_cpu_gettime(void)
|
|
{
|
|
if (_cputime_ops)
|
|
return _cputime_ops->cputime_gettime();
|
|
|
|
rt_set_errno(-ENOSYS);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* The clock_cpu_microsecond() fucntion shall return the microsecond according to
|
|
* cpu_tick parameter.
|
|
*
|
|
* @param cpu_tick the cpu tick
|
|
*
|
|
* @return the microsecond
|
|
*/
|
|
uint32_t clock_cpu_microsecond(uint32_t cpu_tick)
|
|
{
|
|
float unit = clock_cpu_getres();
|
|
|
|
return (cpu_tick * unit) / 1000;
|
|
}
|
|
|
|
/**
|
|
* The clock_cpu_microsecond() fucntion shall return the millisecond according to
|
|
* cpu_tick parameter.
|
|
*
|
|
* @param cpu_tick the cpu tick
|
|
*
|
|
* @return the millisecond
|
|
*/
|
|
uint32_t clock_cpu_millisecond(uint32_t cpu_tick)
|
|
{
|
|
float unit = clock_cpu_getres();
|
|
|
|
return (cpu_tick * unit) / (1000 * 1000);
|
|
}
|
|
|
|
/**
|
|
* The clock_cpu_seops() function shall set the ops of cpu time.
|
|
*
|
|
* @return always return 0.
|
|
*/
|
|
int clock_cpu_setops(const struct rt_clock_cputime_ops *ops)
|
|
{
|
|
_cputime_ops = ops;
|
|
if (ops)
|
|
{
|
|
RT_ASSERT(ops->cputime_getres != RT_NULL);
|
|
RT_ASSERT(ops->cputime_gettime != RT_NULL);
|
|
}
|
|
|
|
return 0;
|
|
}
|