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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-01-30 armink the first version
*/
#include <sys/time.h>
#include <string.h>
#include <rtthread.h>
#include <rtdevice.h>
#ifdef RT_USING_SOFT_RTC
/* 2018-01-30 14:44:50 = RTC_TIME_INIT(2018, 1, 30, 14, 44, 50) */
#define RTC_TIME_INIT(year, month, day, hour, minute, second) \
{.tm_year = year - 1900, .tm_mon = month - 1, .tm_mday = day, .tm_hour = hour, .tm_min = minute, .tm_sec = second}
#ifndef SOFT_RTC_TIME_DEFAULT
#define SOFT_RTC_TIME_DEFAULT RTC_TIME_INIT(2018, 1, 1, 0, 0 ,0)
#endif
static struct rt_device soft_rtc_dev;
static rt_tick_t init_tick;
static time_t init_time;
#ifdef RT_USING_ALARM
static struct rt_rtc_wkalarm wkalarm;
static struct rt_timer alarm_time;
static void alarm_timeout(void *param)
{
rt_alarm_update(param, 1);
}
static void soft_rtc_alarm_update(struct rt_rtc_wkalarm *palarm)
{
rt_tick_t next_tick;
if (palarm->enable)
{
next_tick = RT_TICK_PER_SECOND;
rt_timer_control(&alarm_time, RT_TIMER_CTRL_SET_TIME, &next_tick);
rt_timer_start(&alarm_time);
}
else
{
rt_timer_stop(&alarm_time);
}
}
#endif
static rt_err_t soft_rtc_control(rt_device_t dev, int cmd, void *args)
{
time_t *t;
struct tm time_temp;
RT_ASSERT(dev != RT_NULL);
memset(&time_temp, 0, sizeof(struct tm));
switch (cmd)
{
case RT_DEVICE_CTRL_RTC_GET_TIME:
t = (time_t *) args;
*t = init_time + (rt_tick_get() - init_tick) / RT_TICK_PER_SECOND;
break;
case RT_DEVICE_CTRL_RTC_SET_TIME:
{
t = (time_t *) args;
init_time = *t - (rt_tick_get() - init_tick) / RT_TICK_PER_SECOND;
#ifdef RT_USING_ALARM
soft_rtc_alarm_update(&wkalarm);
#endif
break;
}
#ifdef RT_USING_ALARM
case RT_DEVICE_CTRL_RTC_GET_ALARM:
*((struct rt_rtc_wkalarm *)args) = wkalarm;
break;
case RT_DEVICE_CTRL_RTC_SET_ALARM:
wkalarm = *((struct rt_rtc_wkalarm *)args);
soft_rtc_alarm_update(&wkalarm);
break;
#endif
}
return RT_EOK;
}
#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops soft_rtc_ops =
{
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
soft_rtc_control
};
#endif
static int rt_soft_rtc_init(void)
{
static rt_bool_t init_ok = RT_FALSE;
struct tm time_new = SOFT_RTC_TIME_DEFAULT;
if (init_ok)
{
return 0;
}
/* make sure only one 'rtc' device */
RT_ASSERT(!rt_device_find("rtc"));
#ifdef RT_USING_ALARM
rt_timer_init(&alarm_time,
"alarm",
alarm_timeout,
&soft_rtc_dev,
0,
RT_TIMER_FLAG_SOFT_TIMER|RT_TIMER_FLAG_ONE_SHOT);
#endif
init_tick = rt_tick_get();
init_time = timegm(&time_new);
soft_rtc_dev.type = RT_Device_Class_RTC;
/* register rtc device */
#ifdef RT_USING_DEVICE_OPS
soft_rtc_dev.ops = &soft_rtc_ops;
#else
soft_rtc_dev.init = RT_NULL;
soft_rtc_dev.open = RT_NULL;
soft_rtc_dev.close = RT_NULL;
soft_rtc_dev.read = RT_NULL;
soft_rtc_dev.write = RT_NULL;
soft_rtc_dev.control = soft_rtc_control;
#endif
/* no private */
soft_rtc_dev.user_data = RT_NULL;
rt_device_register(&soft_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR);
init_ok = RT_TRUE;
return 0;
}
INIT_DEVICE_EXPORT(rt_soft_rtc_init);
#endif /* RT_USING_SOFT_RTC */
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