108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
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/*
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* File : soft_rtc.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2018-01-30 armink the first version
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*/
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#include <time.h>
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#include <string.h>
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#include <rtthread.h>
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#include <drivers/rtc.h>
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#ifdef RT_USING_SOFT_RTC
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/* 2018-01-30 14:44:50 = RTC_TIME_INIT(2018, 1, 30, 14, 44, 50) */
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#define RTC_TIME_INIT(year, month, day, hour, minute, second) \
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{.tm_year = year - 1900, .tm_mon = month - 1, .tm_mday = day, .tm_hour = hour, .tm_min = minute, .tm_sec = second}
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#ifndef SOFT_RTC_TIME_DEFAULT
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#define SOFT_RTC_TIME_DEFAULT RTC_TIME_INIT(2018, 1, 1, 0, 0 ,0)
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#endif
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static struct rt_device soft_rtc_dev;
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static rt_tick_t init_tick;
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static time_t init_time;
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static rt_err_t soft_rtc_control(rt_device_t dev, int cmd, void *args)
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{
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time_t *time;
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struct tm time_temp;
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RT_ASSERT(dev != RT_NULL);
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memset(&time_temp, 0, sizeof(struct tm));
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switch (cmd)
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{
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case RT_DEVICE_CTRL_RTC_GET_TIME:
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time = (time_t *) args;
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*time = init_time + (rt_tick_get() - init_tick) / RT_TICK_PER_SECOND;
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break;
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case RT_DEVICE_CTRL_RTC_SET_TIME:
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{
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time = (time_t *) args;
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init_time = *time - (rt_tick_get() - init_tick) / RT_TICK_PER_SECOND;
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break;
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}
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}
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return RT_EOK;
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}
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int rt_soft_rtc_init(void)
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{
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static rt_bool_t init_ok = RT_FALSE;
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struct tm time_new = SOFT_RTC_TIME_DEFAULT;
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if (init_ok)
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{
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return 0;
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}
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/* make sure only one 'rtc' device */
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RT_ASSERT(!rt_device_find("rtc"));
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init_tick = rt_tick_get();
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init_time = mktime(&time_new);
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soft_rtc_dev.type = RT_Device_Class_RTC;
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/* register rtc device */
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soft_rtc_dev.init = RT_NULL;
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soft_rtc_dev.open = RT_NULL;
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soft_rtc_dev.close = RT_NULL;
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soft_rtc_dev.read = RT_NULL;
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soft_rtc_dev.write = RT_NULL;
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soft_rtc_dev.control = soft_rtc_control;
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/* no private */
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soft_rtc_dev.user_data = RT_NULL;
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rt_device_register(&soft_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR);
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init_ok = RT_TRUE;
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return 0;
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}
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INIT_DEVICE_EXPORT(rt_soft_rtc_init);
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#endif /* RT_USING_SOFT_RTC */
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