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/*****************************************************************************
* Copyright (c) 2019, Nations Technologies Inc.
*
* All rights reserved.
* ****************************************************************************
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Nations' name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL NATIONS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ****************************************************************************/
/**
* @file drv_rtc.c
* @author Nations
* @version v1.0.0
*
* @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
*/
#include "board.h"
#include <sys/time.h>
#include <rtdevice.h>
#ifdef BSP_USING_RTC
uint32_t SynchPrediv, AsynchPrediv;
static rt_err_t n32_rtc_get_timeval(struct timeval *tv)
{
struct tm tm_new = {0};
RTC_DateType RTC_DateStructure;
RTC_TimeType RTC_TimeStructure;
RTC_GetTime(RTC_FORMAT_BIN, &RTC_TimeStructure);
RTC_GetDate(RTC_FORMAT_BIN, &RTC_DateStructure);
tm_new.tm_sec = RTC_TimeStructure.Seconds;
tm_new.tm_min = RTC_TimeStructure.Minutes;
tm_new.tm_hour = RTC_TimeStructure.Hours;
tm_new.tm_wday = RTC_DateStructure.WeekDay;
tm_new.tm_mday = RTC_DateStructure.Date;
tm_new.tm_mon = RTC_DateStructure.Month - 1;
tm_new.tm_year = RTC_DateStructure.Year + 100;
tv->tv_sec = timegm(&tm_new);
return RT_EOK;
}
static rt_err_t set_rtc_time_stamp(time_t time_stamp)
{
struct tm time = {0};
RTC_DateType RTC_DateStructure={0};
RTC_TimeType RTC_TimeStructure={0};
gmtime_r(&time_stamp, &time);
if(time.tm_year < 100)
{
return -RT_ERROR;
}
RTC_TimeStructure.Seconds = time.tm_sec ;
RTC_TimeStructure.Minutes = time.tm_min ;
RTC_TimeStructure.Hours = time.tm_hour;
RTC_DateStructure.Date = time.tm_mday;
RTC_DateStructure.Month = time.tm_mon + 1 ;
RTC_DateStructure.Year = time.tm_year - 100;
RTC_DateStructure.WeekDay = time.tm_wday + 1;
if(RTC_SetDate(RTC_FORMAT_BIN, &RTC_DateStructure) != SUCCESS)
{
return -RT_ERROR;
}
if(RTC_ConfigTime(RTC_FORMAT_BIN, &RTC_TimeStructure) != SUCCESS)
{
return -RT_ERROR;
}
rt_kprintf("set rtc time.\n");
return RT_EOK;
}
static rt_err_t rt_rtc_config(void)
{
RTC_InitType RTC_InitStructure;
/* Configure the RTC data register and RTC prescaler */
RTC_InitStructure.RTC_AsynchPrediv = AsynchPrediv;
RTC_InitStructure.RTC_SynchPrediv = SynchPrediv;
RTC_InitStructure.RTC_HourFormat = RTC_24HOUR_FORMAT;
/* Check on RTC init */
if(RTC_Init(&RTC_InitStructure) != SUCCESS)
{
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t n32_rtc_init(void)
{
/* Enable the PWR clock */
RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_PWR | RCC_APB1_PERIPH_BKP, ENABLE);
RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_AFIO, ENABLE);
/* Allow access to RTC */
PWR_BackupAccessEnable(ENABLE);
/* Reset Backup */
BKP_DeInit();
/* Disable RTC clock */
RCC_EnableRtcClk(DISABLE);
#ifdef BSP_RTC_USING_LSI
rt_kprintf("rtc clock source is set lsi!\n");
/* Enable the LSI OSC */
RCC_EnableLsi(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_LSIRD) == RESET)
{
}
RCC_ConfigRtcClk(RCC_RTCCLK_SRC_LSI);
SynchPrediv = 0x136; // 39.64928KHz
AsynchPrediv = 0x7F; // value range: 0-7F
#else
rt_kprintf("rtc clock source is set lse!\n");
/* Enable the LSE OSC32_IN PC14 */
RCC_EnableLsi(DISABLE); // LSI is turned off here to ensure that only one clock is turned on
RCC_ConfigLse(RCC_LSE_ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_LSERD) == RESET)
{
}
RCC_ConfigRtcClk(RCC_RTCCLK_SRC_LSE);
SynchPrediv = 0xFF; // 32.768KHz
AsynchPrediv = 0x7F; // value range: 0-7F
#endif /* BSP_RTC_USING_LSI */
/* Enable the RTC Clock */
RCC_EnableRtcClk(ENABLE);
RTC_WaitForSynchro();
if(rt_rtc_config() != RT_EOK)
{
rt_kprintf("rtc init failed.\n");
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t n32_rtc_get_secs(time_t *sec)
{
struct timeval tv;
n32_rtc_get_timeval(&tv);
*(time_t *) sec = tv.tv_sec;
rt_kprintf("RTC: get rtc_time %d.\n", *sec);
return RT_EOK;
}
static rt_err_t n32_rtc_set_secs(time_t *sec)
{
rt_err_t result = RT_EOK;
if(set_rtc_time_stamp(*sec))
{
result = -RT_ERROR;
}
rt_kprintf("RTC: set rtc_time %d.\n", *sec);
return result;
}
static const struct rt_rtc_ops n32_rtc_ops =
{
n32_rtc_init,
n32_rtc_get_secs,
n32_rtc_set_secs,
RT_NULL,
RT_NULL,
n32_rtc_get_timeval,
RT_NULL,
};
static rt_rtc_dev_t n32_rtc_dev;
static int rt_hw_rtc_init(void)
{
rt_err_t result;
n32_rtc_dev.ops = &n32_rtc_ops;
result = rt_hw_rtc_register(&n32_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR, RT_NULL);
if(result != RT_EOK)
{
rt_kprintf("rtc register error code: %d.\n", result);
return result;
}
else
{
rt_kprintf("rtc initialize success.\n");
}
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_rtc_init);
#endif /* BSP_USING_RTC */
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