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/*
* File : clock_time.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2012, 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
* 2012-12-08 Bernard fix the issue of _timevalue.tv_usec initialization,
* which found by Rob <[email protected]>
*/
#include <rtthread.h>
#include <pthread.h>
struct timeval _timevalue;
void clock_time_system_init()
{
time_t time;
rt_tick_t tick;
rt_device_t device;
time = 0;
device = rt_device_find("rtc");
if (device != RT_NULL)
{
/* get realtime seconds */
rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time);
}
/* get tick */
tick = rt_tick_get();
_timevalue.tv_usec = (tick%RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
_timevalue.tv_sec = time - tick/RT_TICK_PER_SECOND - 1;
}
int clock_time_to_tick(const struct timespec *time)
{
int tick;
int nsecond, second;
struct timespec tp;
RT_ASSERT(time != RT_NULL);
tick = RT_WAITING_FOREVER;
if (time != NULL)
{
/* get current tp */
clock_gettime(CLOCK_REALTIME, &tp);
if ((time->tv_nsec - tp.tv_nsec) < 0)
{
nsecond = NANOSECOND_PER_SECOND - (tp.tv_nsec - time->tv_nsec);
second = time->tv_sec - tp.tv_sec - 1;
}
else
{
nsecond = time->tv_nsec - tp.tv_nsec;
second = time->tv_sec - tp.tv_sec;
}
tick = second * RT_TICK_PER_SECOND + nsecond * RT_TICK_PER_SECOND / NANOSECOND_PER_SECOND;
if (tick < 0) tick = 0;
}
return tick;
}
RTM_EXPORT(clock_time_to_tick);
int clock_getres(clockid_t clockid, struct timespec *res)
{
if ((clockid != CLOCK_REALTIME) || (res == RT_NULL))
{
rt_set_errno(EINVAL);
return -1;
}
res->tv_sec = 0;
res->tv_nsec = NANOSECOND_PER_SECOND/RT_TICK_PER_SECOND;
return 0;
}
RTM_EXPORT(clock_getres);
int clock_gettime(clockid_t clockid, struct timespec *tp)
{
rt_tick_t tick;
if ((clockid != CLOCK_REALTIME) || (tp == RT_NULL))
{
rt_set_errno(EINVAL);
return -1;
}
/* get tick */
tick = rt_tick_get();
tp->tv_sec = _timevalue.tv_sec + tick / RT_TICK_PER_SECOND;
tp->tv_nsec = (_timevalue.tv_usec + (tick % RT_TICK_PER_SECOND) * NANOSECOND_PER_TICK) * 1000;
return 0;
}
RTM_EXPORT(clock_gettime);
int clock_settime(clockid_t clockid, const struct timespec *tp)
{
int second;
rt_tick_t tick;
rt_device_t device;
if ((clockid != CLOCK_REALTIME) || (tp == RT_NULL))
{
rt_set_errno(EINVAL);
return -1;
}
/* get second */
second = tp->tv_sec;
/* get tick */
tick = rt_tick_get();
/* update timevalue */
_timevalue.tv_usec = MICROSECOND_PER_SECOND - (tick % RT_TICK_PER_SECOND) * MICROSECOND_PER_TICK;
_timevalue.tv_sec = second - tick/RT_TICK_PER_SECOND - 1;
/* update for RTC device */
device = rt_device_find("rtc");
if (device != RT_NULL)
{
/* set realtime seconds */
rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_TIME, &second);
}
else
return -1;
return 0;
}
RTM_EXPORT(clock_settime);
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