612 lines
16 KiB
C
612 lines
16 KiB
C
/*
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* File : alarm.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2012-10-27 heyuanjie87 first version.
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#define RT_RTC_YEARS_MAX 137
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#define RT_ALARM_DELAY 2
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#define RT_ALARM_STATE_INITED 0x02
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#define RT_ALARM_STATE_START 0x01
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#define RT_ALARM_STATE_STOP 0x00
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#if(defined(RT_USING_RTC) && defined(RT_USING_ALARM))
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static struct rt_alarm_container _container;
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rt_inline rt_uint32_t alarm_mkdaysec(struct tm *time)
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{
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rt_uint32_t sec;
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sec = time->tm_sec;
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sec += time->tm_min * 60;
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sec += time->tm_hour * 3600;
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return (sec);
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}
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static rt_err_t alarm_set(struct rt_alarm *alarm)
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{
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rt_device_t device;
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struct rt_rtc_wkalarm wkalarm;
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rt_err_t ret;
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device = rt_device_find("rtc");
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if (device == RT_NULL)
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{
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return (RT_ERROR);
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}
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if (alarm->flag & RT_ALARM_STATE_START)
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wkalarm.enable = RT_TRUE;
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else
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wkalarm.enable = RT_FALSE;
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wkalarm.tm_sec = alarm->wktime.tm_sec;
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wkalarm.tm_min = alarm->wktime.tm_min;
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wkalarm.tm_hour = alarm->wktime.tm_hour;
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ret = rt_device_control(device, RT_DEVICE_CTRL_RTC_SET_ALARM, &wkalarm);
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if ((ret == RT_EOK) && wkalarm.enable)
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{
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ret = rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_ALARM, &wkalarm);
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if (ret == RT_EOK)
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{
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/*
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some RTC device like RX8025,it's alarms precision is 1 minute.
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in this case,low level RTC driver should set wkalarm->tm_sec to 0.
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*/
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alarm->wktime.tm_sec = wkalarm.tm_sec;
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alarm->wktime.tm_min = wkalarm.tm_min;
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alarm->wktime.tm_hour = wkalarm.tm_hour;
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}
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}
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return (ret);
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}
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static void alarm_wakeup(struct rt_alarm *alarm, struct tm *now)
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{
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rt_uint32_t sec_alarm, sec_now;
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rt_bool_t wakeup = RT_FALSE;
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time_t timestamp;
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sec_alarm = alarm_mkdaysec(&alarm->wktime);
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sec_now = alarm_mkdaysec(now);
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if (alarm->flag & RT_ALARM_STATE_START)
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{
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switch (alarm->flag & 0xFF00)
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{
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case RT_ALARM_ONESHOT:
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{
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sec_alarm = mktime(&alarm->wktime);
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sec_now = mktime(now);
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if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
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{
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/* stop alarm */
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alarm->flag &= ~RT_ALARM_STATE_START;
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alarm_set(alarm);
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wakeup = RT_TRUE;
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}
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}
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break;
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case RT_ALARM_DAILY:
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{
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if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
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wakeup = RT_TRUE;
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}
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break;
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case RT_ALARM_WEEKLY:
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{
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/* alarm at wday */
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sec_alarm += alarm->wktime.tm_wday * 24 * 3600;
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sec_now += now->tm_wday * 24 * 3600;
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if (((sec_now - sec_alarm) <= RT_ALARM_DELAY) && (sec_now >= sec_alarm))
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wakeup = RT_TRUE;
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}
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break;
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case RT_ALARM_MONTHLY:
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{
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/* monthly someday generate alarm signals */
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if (alarm->wktime.tm_mday == now->tm_mday)
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{
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if ((sec_now - sec_alarm) <= RT_ALARM_DELAY)
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wakeup = RT_TRUE;
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}
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}
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break;
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case RT_ALARM_YAERLY:
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{
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if ((alarm->wktime.tm_mday == now->tm_mday) && \
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(alarm->wktime.tm_mon == now->tm_mon))
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{
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if ((sec_now - sec_alarm) <= RT_ALARM_DELAY)
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wakeup = RT_TRUE;
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}
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}
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break;
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}
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if ((wakeup == RT_TRUE) && (alarm->callback != RT_NULL))
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{
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timestamp = time(RT_NULL);
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alarm->callback(alarm, timestamp);
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}
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}
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}
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static void alarm_update(rt_uint32_t event)
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{
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struct rt_alarm *alm_prev = RT_NULL, *alm_next = RT_NULL;
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struct rt_alarm *alarm;
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rt_int32_t sec_now, sec_alarm, sec_tmp;
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rt_int32_t sec_next = 24 * 3600, sec_prev = 0;
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time_t timestamp;
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struct tm now;
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rt_list_t *next;
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rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
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if (!rt_list_isempty(&_container.head))
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{
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/* get time of now */
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timestamp = time(RT_NULL);
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localtime_r(×tamp, &now);
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for (next = _container.head.next; next != &_container.head; next = next->next)
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{
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alarm = rt_list_entry(next, struct rt_alarm, list);
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/* check the overtime alarm */
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alarm_wakeup(alarm, &now);
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}
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timestamp = time(RT_NULL);
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localtime_r(×tamp, &now);
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sec_now = alarm_mkdaysec(&now);
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for (next = _container.head.next; next != &_container.head; next = next->next)
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{
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alarm = rt_list_entry(next, struct rt_alarm, list);
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/* calculate seconds from 00:00:00 */
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sec_alarm = alarm_mkdaysec(&alarm->wktime);
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if ((alarm->flag & RT_ALARM_STATE_START) && (alarm != _container.current))
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{
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sec_tmp = sec_alarm - sec_now;
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if (sec_tmp > 0)
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{
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/* find alarm after now(now to 23:59:59) and the most recent */
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if (sec_tmp < sec_next)
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{
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sec_next = sec_tmp;
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alm_next = alarm;
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}
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}
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else
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{
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/* find alarm before now(00:00:00 to now) and furthest from now */
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if (sec_tmp < sec_prev)
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{
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sec_prev = sec_tmp;
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alm_prev = alarm;
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}
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}
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}
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}
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/* enable the alarm after now first */
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if (sec_next < 24 * 3600)
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{
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if (alarm_set(alm_next) == RT_EOK)
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_container.current = alm_next;
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}
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else if (sec_prev < 0)
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{
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/* enable the alarm before now */
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if (alarm_set(alm_prev) == RT_EOK)
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_container.current = alm_prev;
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}
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}
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rt_mutex_release(&_container.mutex);
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}
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static rt_uint32_t days_of_year_month(int tm_year, int tm_mon)
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{
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rt_uint32_t ret, year;
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year = tm_year + 1900;
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if (tm_mon == 1)
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{
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ret = 28 + ((!(year % 4) && (year % 100)) || !(year % 400));
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}
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else if (((tm_mon <= 6) && (tm_mon % 2 == 0)) || ((tm_mon > 6) && (tm_mon % 2 == 1)))
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{
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ret = 31;
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}
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else
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{
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ret = 30;
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}
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return (ret);
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}
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static rt_bool_t is_valid_date(struct tm *date)
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{
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if ((date->tm_year < 0) || (date->tm_year > RT_RTC_YEARS_MAX))
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{
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return (RT_FALSE);
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}
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if ((date->tm_mon < 0) || (date->tm_mon > 11))
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{
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return (RT_FALSE);
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}
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if ((date->tm_mday < 1) || \
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(date->tm_mday > days_of_year_month(date->tm_year, date->tm_mon)))
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{
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return (RT_FALSE);
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}
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return (RT_TRUE);
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}
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static rt_err_t alarm_setup(rt_alarm_t alarm, struct tm *wktime)
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{
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rt_err_t ret = RT_ERROR;
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time_t timestamp;
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struct tm *setup, now;
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setup = &alarm->wktime;
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*setup = *wktime;
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timestamp = time(RT_NULL);
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localtime_r(×tamp, &now);
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/* if these are a "don't care" value,we set them to now*/
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if ((setup->tm_sec > 59) || (setup->tm_sec < 0))
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setup->tm_sec = now.tm_sec;
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if ((setup->tm_min > 59) || (setup->tm_min < 0))
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setup->tm_min = now.tm_min;
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if ((setup->tm_hour > 23) || (setup->tm_hour < 0))
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setup->tm_hour = now.tm_hour;
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switch (alarm->flag & 0xFF00)
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{
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case RT_ALARM_DAILY:
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{
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/* do nothing but needed */
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}
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break;
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case RT_ALARM_ONESHOT:
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{
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/* if these are "don't care" value we set them to now */
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if (setup->tm_year == RT_ALARM_TM_NOW)
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setup->tm_year = now.tm_year;
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if (setup->tm_mon == RT_ALARM_TM_NOW)
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setup->tm_mon = now.tm_mon;
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if (setup->tm_mday == RT_ALARM_TM_NOW)
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setup->tm_mday = now.tm_mday;
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/* make sure the setup is valid */
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if (!is_valid_date(setup))
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goto _exit;
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}
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break;
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case RT_ALARM_WEEKLY:
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{
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/* if tm_wday is a "don't care" value we set it to now */
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if ((setup->tm_wday < 0) || (setup->tm_wday > 6))
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setup->tm_wday = now.tm_wday;
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}
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break;
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case RT_ALARM_MONTHLY:
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{
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/* if tm_mday is a "don't care" value we set it to now */
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if ((setup->tm_mday < 1) || (setup->tm_mday > 31))
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setup->tm_mday = now.tm_mday;
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}
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break;
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case RT_ALARM_YAERLY:
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{
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/* if tm_mon is a "don't care" value we set it to now */
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if ((setup->tm_mon < 0) || (setup->tm_mon > 11))
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setup->tm_mon = now.tm_mon;
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if (setup->tm_mon == 1)
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{
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/* tm_mon is February */
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/* tm_mday should be 1~29.otherwise,it's a "don't care" value */
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if ((setup->tm_mday < 1) || (setup->tm_mday > 29))
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setup->tm_mday = now.tm_mday;
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}
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else if (((setup->tm_mon <= 6) && (setup->tm_mon % 2 == 0)) || \
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((setup->tm_mon > 6) && (setup->tm_mon % 2 == 1)))
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{
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/* Jan,Mar,May,Jul,Aug,Oct,Dec */
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/* tm_mday should be 1~31.otherwise,it's a "don't care" value */
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if ((setup->tm_mday < 1) || (setup->tm_mday > 31))
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setup->tm_mday = now.tm_mday;
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}
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else
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{
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/* tm_mday should be 1~30.otherwise,it's a "don't care" value */
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if ((setup->tm_mday < 1) || (setup->tm_mday > 30))
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setup->tm_mday = now.tm_mday;
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}
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}
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break;
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default:
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{
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goto _exit;
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}
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}
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if ((setup->tm_hour == 23) && (setup->tm_min == 59) && (setup->tm_sec == 59))
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{
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/*
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for insurance purposes, we will generate an alarm
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signal two seconds ahead of.
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*/
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setup->tm_sec = 60 - RT_ALARM_DELAY;
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}
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/* set initialized state */
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alarm->flag |= RT_ALARM_STATE_INITED;
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ret = RT_EOK;
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_exit:
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return (ret);
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}
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/** \brief send a rtc alarm event
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*
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* \param dev pointer to RTC device(currently unused,you can ignore it)
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* \param event RTC event(currently unused)
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* \return none
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*/
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void rt_alarm_update(rt_device_t dev, rt_uint32_t event)
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{
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rt_event_send(&_container.event, 1);
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}
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/** \brief modify the alarm setup
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*
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* \param alarm pointer to alarm
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* \param cmd control command
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* \param arg argument
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*/
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rt_err_t rt_alarm_control(rt_alarm_t alarm, rt_uint8_t cmd, void *arg)
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{
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rt_err_t ret = RT_ERROR;
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RT_ASSERT(alarm != RT_NULL);
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rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
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switch (cmd)
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{
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case RT_ALARM_MODIFY:
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{
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struct rt_alarm_setup *setup;
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RT_ASSERT(arg != RT_NULL);
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setup = arg;
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rt_alarm_stop(alarm);
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alarm->flag = setup->flag & 0xFF00;
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alarm->wktime = setup->wktime;
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ret = alarm_setup(alarm, &alarm->wktime);
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}
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break;
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}
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rt_mutex_release(&_container.mutex);
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return (ret);
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}
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/** \brief start a alarm
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*
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* \param alarm pointer to alarm
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* \return RT_EOK
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*/
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rt_err_t rt_alarm_start(rt_alarm_t alarm)
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{
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rt_int32_t sec_now, sec_old, sec_new;
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rt_err_t ret = RT_ERROR;
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time_t timestamp;
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struct tm now;
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if (alarm == RT_NULL)
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return (ret);
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rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
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if (!(alarm->flag & RT_ALARM_STATE_INITED))
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{
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if (alarm_setup(alarm, &alarm->wktime) != RT_EOK)
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goto _exit;
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}
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if ((alarm->flag & 0x01) == RT_ALARM_STATE_STOP)
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{
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timestamp = time(RT_NULL);
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localtime_r(×tamp, &now);
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alarm->flag |= RT_ALARM_STATE_START;
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/* set alarm */
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if (_container.current == RT_NULL)
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{
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ret = alarm_set(alarm);
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}
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else
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{
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sec_now = alarm_mkdaysec(&now);
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sec_old = alarm_mkdaysec(&_container.current->wktime);
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sec_new = alarm_mkdaysec(&alarm->wktime);
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if ((sec_new < sec_old) && (sec_new > sec_now))
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{
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ret = alarm_set(alarm);
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}
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else if ((sec_new > sec_now) && (sec_old < sec_now))
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{
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ret = alarm_set(alarm);
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}
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else if ((sec_new < sec_old) && (sec_old < sec_now))
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{
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ret = alarm_set(alarm);
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}
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else
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{
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ret = RT_EOK;
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goto _exit;
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}
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}
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if (ret == RT_EOK)
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{
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_container.current = alarm;
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}
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}
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_exit:
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rt_mutex_release(&_container.mutex);
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return (ret);
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}
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/** \brief stop a alarm
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*
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* \param alarm pointer to alarm
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* \return RT_EOK
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*/
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rt_err_t rt_alarm_stop(rt_alarm_t alarm)
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{
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rt_err_t ret = RT_ERROR;
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if (alarm == RT_NULL)
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return (ret);
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rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
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if (!(alarm->flag & RT_ALARM_STATE_START))
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goto _exit;
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/* stop alarm */
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alarm->flag &= ~RT_ALARM_STATE_START;
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if (_container.current == alarm)
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{
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ret = alarm_set(alarm);
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_container.current = RT_NULL;
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}
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if (ret == RT_EOK)
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alarm_update(0);
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_exit:
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rt_mutex_release(&_container.mutex);
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return (ret);
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}
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/** \brief delete a alarm
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*
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* \param alarm pointer to alarm
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* \return RT_EOK
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*/
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rt_err_t rt_alarm_delete(rt_alarm_t alarm)
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{
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rt_err_t ret = RT_ERROR;
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if (alarm == RT_NULL)
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return (ret);
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rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
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/* stop the alarm */
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alarm->flag &= ~RT_ALARM_STATE_START;
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if (_container.current == alarm)
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{
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ret = alarm_set(alarm);
|
|
_container.current = RT_NULL;
|
|
/* set new alarm if necessary */
|
|
alarm_update(0);
|
|
}
|
|
rt_list_remove(&alarm->list);
|
|
rt_free(alarm);
|
|
|
|
rt_mutex_release(&_container.mutex);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/** \brief create a alarm
|
|
*
|
|
* \param flag set alarm mode e.g: RT_ALARM_DAILY
|
|
* \param setup pointer to setup infomation
|
|
*/
|
|
rt_alarm_t rt_alarm_create(rt_alarm_callback_t callback, struct rt_alarm_setup *setup)
|
|
{
|
|
struct rt_alarm *alarm;
|
|
|
|
if (setup == RT_NULL)
|
|
return (RT_NULL);
|
|
alarm = rt_malloc(sizeof(struct rt_alarm));
|
|
if (alarm == RT_NULL)
|
|
return (RT_NULL);
|
|
rt_list_init(&alarm->list);
|
|
|
|
alarm->wktime = setup->wktime;
|
|
alarm->flag = setup->flag & 0xFF00;
|
|
alarm->callback = callback;
|
|
rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
|
|
rt_list_insert_after(&_container.head, &alarm->list);
|
|
rt_mutex_release(&_container.mutex);
|
|
|
|
return (alarm);
|
|
}
|
|
|
|
/** \brief rtc alarm service thread entry
|
|
*
|
|
*/
|
|
static void rt_alarmsvc_thread_init(void *param)
|
|
{
|
|
rt_uint32_t recv;
|
|
|
|
rt_list_init(&_container.head);
|
|
rt_event_init(&_container.event, "alarmsvc", RT_IPC_FLAG_FIFO);
|
|
rt_mutex_init(&_container.mutex, "alarmsvc", RT_IPC_FLAG_FIFO);
|
|
_container.current = RT_NULL;
|
|
|
|
while (1)
|
|
{
|
|
if (rt_event_recv(&_container.event, 0xFFFF,
|
|
RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR,
|
|
RT_WAITING_FOREVER, &recv) == RT_EOK)
|
|
{
|
|
alarm_update(recv);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/** \brief initialize alarm service system
|
|
*
|
|
* \param none
|
|
* \return none
|
|
*/
|
|
void rt_alarm_system_init(void)
|
|
{
|
|
rt_thread_t tid;
|
|
|
|
tid = rt_thread_create("alarmsvc",
|
|
rt_alarmsvc_thread_init, RT_NULL,
|
|
512, 8, 1);
|
|
if (tid != RT_NULL)
|
|
rt_thread_startup(tid);
|
|
}
|
|
#endif
|