Function set_time

components/drivers/rtc/dev_rtc.c:193–229

* Set system time(date not modify, local timezone). * * @param rt_uint32_t hour e.g: 0~23. * @param rt_uint32_t minute e.g: 0~59. * @param rt_uint32_t second e.g: 0~59. * * @return rt_err_t if set success, return RT_EOK. */

 * @return rt_err_t if set success, return RT_EOK.
 */
rt_err_t set_time(rt_uint32_t hour, rt_uint32_t minute, rt_uint32_t second)
{
    time_t now, old_timestamp = 0;
    struct tm tm_new = {0};
    rt_err_t ret = -RT_ERROR;

    if (_rtc_device == RT_NULL)
    {
        _rtc_device = rt_device_find("rtc");
        if (_rtc_device == RT_NULL)
        {
            return -RT_ERROR;
        }
    }

    /* get current time */
    ret = rt_device_control(_rtc_device, RT_DEVICE_CTRL_RTC_GET_TIME, &old_timestamp);
    if (ret != RT_EOK)
    {
        return ret;
    }

    /* converts calendar time into local time. */
    localtime_r(&old_timestamp, &tm_new);

    /* update time. */
    tm_new.tm_hour = hour;
    tm_new.tm_min  = minute;
    tm_new.tm_sec  = second;

    /* converts the local time into the calendar time. */
    now = mktime(&tm_new);

    /* update to RTC device. */
    ret = rt_device_control(_rtc_device, RT_DEVICE_CTRL_RTC_SET_TIME, &now);
    return ret;
}

/**
 * Set timestamp(UTC).