rt-thread/bsp/Infineon/libraries/HAL_Drivers/drv_rtc.c

/*
 * Copyright (c) 2006-2023, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date         Author         Notes
 * 2022-07-25   Rbb666         first version
 */

#include <rtthread.h>
#include <rtdevice.h>
#include <sys/time.h>
#include "drv_common.h"

#ifdef BSP_USING_RTC

//#define DRV_DEBUG
#define LOG_TAG                         "drv.rtc"
#include <drv_log.h>

cyhal_rtc_t rtc_obj;

static rt_rtc_dev_t ifx32_rtc_dev;

static int get_day_of_week(int day, int month, int year)
{
    int ret;
    int k = 0;
    int j = 0;

    if (month < CY_RTC_MARCH)
    {
        month += CY_RTC_MONTHS_PER_YEAR;
        year--;
    }

    k = (year % 100);
    j = (year / 100);
    ret = (day + (13 * (month + 1) / 5) + k + (k / 4) + (j / 4) + (5 * j)) % 7;
    ret = ((ret + 6) % 7);

    return ret;
}

static rt_err_t set_rtc_time_stamp(time_t time_stamp)
{
    struct tm tm = {0};
    struct tm new_time = {0};

    gmtime_r(&time_stamp, &tm);

    if (tm.tm_year < 100)
    {
        return -RT_ERROR;
    }

    new_time.tm_sec     = tm.tm_sec ;
    new_time.tm_min     = tm.tm_min ;
    new_time.tm_hour    = tm.tm_hour;
    new_time.tm_mday    = tm.tm_mday;
    new_time.tm_mon     = tm.tm_mon;
    new_time.tm_year    = tm.tm_year;
    new_time.tm_wday    = get_day_of_week(tm.tm_mday, tm.tm_mon, tm.tm_year);

    if (cyhal_rtc_write(&rtc_obj, &new_time) != RT_EOK)
    {
        return -RT_ERROR;
    }

    LOG_D("set rtc time.");

    return RT_EOK;
}

static rt_err_t ifx_rtc_get_timeval(struct timeval *tv)
{
    struct tm tm_new = {0};
    struct tm date_time = {0};

    cyhal_rtc_read(&rtc_obj, &date_time);

    tm_new.tm_sec  = date_time.tm_sec;
    tm_new.tm_min  = date_time.tm_min;
    tm_new.tm_hour = date_time.tm_hour;
    tm_new.tm_mday = date_time.tm_mday;
    tm_new.tm_mon  = date_time.tm_mon;
    tm_new.tm_year = date_time.tm_year;

    tv->tv_sec = timegm(&tm_new);

    return RT_EOK;
}

static rt_err_t _rtc_init(void)
{
#ifdef BSP_RTC_USING_LSE
    Cy_RTC_SelectClockSource(CY_RTC_CLK_SELECT_WCO);
#else
    Cy_RTC_SelectClockSource(CY_RTC_CLK_SELECT_ILO);
#endif /* BSP_RTC_USING_LSE */
    if (cyhal_rtc_init(&rtc_obj) != RT_EOK)
    {
        LOG_E("rtc init failed.");
        return -RT_ERROR;
    }

    return RT_EOK;
}

static rt_err_t _rtc_get_secs(time_t *sec)
{
    struct timeval tv;

    ifx_rtc_get_timeval(&tv);
    *(time_t *) sec = tv.tv_sec;
    LOG_D("RTC: get rtc_time %d", *sec);

    return RT_EOK;
}

static rt_err_t _rtc_set_secs(time_t *sec)
{
    rt_err_t result = RT_EOK;

    if (set_rtc_time_stamp(*sec))
    {
        result = -RT_ERROR;
    }

    LOG_D("RTC: set rtc_time %d", *sec);

    return result;
}

static const struct rt_rtc_ops _rtc_ops =
{
    _rtc_init,
    _rtc_get_secs,
    _rtc_set_secs,
    RT_NULL,
    RT_NULL,
    ifx_rtc_get_timeval,
    RT_NULL,
};

/**
 * @brief    RTC initialization function.
 *
 * @return   RT_EOK indicates successful initialization, other value indicates failed;
 */
static int rt_hw_rtc_init(void)
{
    rt_err_t result = RT_EOK;

    ifx32_rtc_dev.ops = &_rtc_ops;

    if (rt_hw_rtc_register(&ifx32_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR, RT_NULL) != RT_EOK)
    {
        LOG_E("rtc init failed");
        result = -RT_ERROR;
    }
    else
    {
        LOG_D("rtc init success");
    }

    return result;
}

INIT_DEVICE_EXPORT(rt_hw_rtc_init);
#endif