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rt-thread-official/bsp/at32/Libraries/rt_drivers/drv_rtc.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-05-19 shelton first version
*/
#include "board.h"
#include <rtthread.h>
#include <sys/time.h>
#ifdef BSP_USING_RTC
#ifndef BKP_DR1
#define BKP_DR1 RT_NULL
#endif
//#define DRV_DEBUG
#define LOG_TAG "drv.rtc"
#include <drv_log.h>
#define BKUP_REG_DATA 0xA5A5
static struct rt_device rtc;
static time_t get_rtc_timestamp(void)
{
#ifdef SOC_SERIES_AT32F415
struct tm tm_new;
ERTC_TimeType ERTC_TimeStruct;
ERTC_DateType ERTC_DateStruct;
ERTC_GetTimeValue(ERTC_Format_BIN, &ERTC_TimeStruct);
ERTC_GetDateValue(ERTC_Format_BIN, &ERTC_DateStruct);
tm_new.tm_sec = ERTC_TimeStruct.ERTC_Seconds;
tm_new.tm_min = ERTC_TimeStruct.ERTC_Minutes;
tm_new.tm_hour = ERTC_TimeStruct.ERTC_Hours;
tm_new.tm_mday = ERTC_DateStruct.ERTC_Date;
tm_new.tm_mon = ERTC_DateStruct.ERTC_Month - 1;
tm_new.tm_year = ERTC_DateStruct.ERTC_Year + 100;
LOG_D("get rtc time.");
return timegm(&tm_new);
#else
return RTC_GetCounter();
#endif
}
static rt_err_t set_rtc_time_stamp(time_t time_stamp)
{
#ifdef SOC_SERIES_AT32F415
ERTC_TimeType ERTC_TimeStructure;
ERTC_DateType ERTC_DateStructure;
struct tm *p_tm;
p_tm = gmtime(&time_stamp);
if (p_tm->tm_year < 100)
{
return -RT_ERROR;
}
ERTC_TimeStructure.ERTC_Seconds = p_tm->tm_sec ;
ERTC_TimeStructure.ERTC_Minutes = p_tm->tm_min ;
ERTC_TimeStructure.ERTC_Hours = p_tm->tm_hour;
ERTC_DateStructure.ERTC_Date = p_tm->tm_mday;
ERTC_DateStructure.ERTC_Month = p_tm->tm_mon + 1 ;
ERTC_DateStructure.ERTC_Year = p_tm->tm_year - 100;
ERTC_DateStructure.ERTC_WeekDay = p_tm->tm_wday + 1;
if (ERTC_SetTimeValue(ERTC_Format_BIN, &ERTC_TimeStructure) != SUCCESS)
{
return -RT_ERROR;
}
if (ERTC_SetDateValue(ERTC_Format_BIN, &ERTC_DateStructure) != SUCCESS)
{
return -RT_ERROR;
}
#else
/* Set the RTC counter value */
RTC_SetCounter(time_stamp);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
#endif /* SOC_SERIES_AT32F415 */
LOG_D("set rtc time.");
#ifdef SOC_SERIES_AT32F415
ERTC_WriteBackupRegister(ERTC_BKP_DT0, BKUP_REG_DATA);
#else
BKP_WriteBackupReg(BKP_DT1, BKUP_REG_DATA);
#endif
return RT_EOK;
}
static void rt_rtc_init(void)
{
#if defined (SOC_SERIES_AT32F415)
RCC_APB1PeriphClockCmd(RCC_APB1PERIPH_PWR, ENABLE);
#else
RCC_APB1PeriphClockCmd(RCC_APB1PERIPH_PWR | RCC_APB1PERIPH_BKP, ENABLE);
#endif
#ifdef BSP_RTC_USING_LSI
RCC_LSICmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_LSISTBL) == RESET);
#else
PWR_BackupAccessCtrl(ENABLE);
RCC_LSEConfig(RCC_LSE_ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_LSESTBL) == RESET);
#endif /* BSP_RTC_USING_LSI */
}
static rt_err_t rt_rtc_config(struct rt_device *dev)
{
#if defined (SOC_SERIES_AT32F415)
ERTC_InitType ERTC_InitStructure;
#endif
/* Allow access to BKP Domain */
PWR_BackupAccessCtrl(ENABLE);
#ifdef SOC_SERIES_AT32F415
#ifdef BSP_RTC_USING_LSI
RCC_ERTCCLKConfig(RCC_ERTCCLKSelection_LSI);
RCC_ERTCCLKCmd(ENABLE);
#else
RCC_ERTCCLKConfig(RCC_ERTCCLKSelection_LSE);
RCC_ERTCCLKCmd(ENABLE);
#endif /* BSP_RTC_USING_LSI */
/* Wait for ERTC APB registers synchronisation */
ERTC_WaitForSynchro();
#else
#ifdef BSP_RTC_USING_LSI
RCC_RTCCLKConfig(RCC_RTCCLKSelection_LSI);
RCC_RTCCLKCmd(ENABLE);
#else
RCC_RTCCLKConfig(RCC_RTCCLKSelection_LSE);
RCC_RTCCLKCmd(ENABLE);
#endif /* BSP_RTC_USING_LSI */
/* Wait for RTC registers synchronization */
RTC_WaitForSynchro();
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
#endif /* SOC_SERIES_AT32F415 */
#ifdef SOC_SERIES_AT32F415
if (ERTC_ReadBackupRegister(BKP_DT1)!= BKUP_REG_DATA)
#else
if (BKP_ReadBackupReg(BKP_DT1) != BKUP_REG_DATA)
#endif
{
LOG_I("RTC hasn't been configured, please use <date> command to config.");
#ifdef SOC_SERIES_AT32F415
/* Configure the ERTC data register and ERTC prescaler */
ERTC_InitStructure.ERTC_AsynchPrediv = 0x7F;
ERTC_InitStructure.ERTC_SynchPrediv = 0xFF;
ERTC_InitStructure.ERTC_HourFormat = ERTC_HourFormat_24;
ERTC_Init(&ERTC_InitStructure);
#else
/* Set RTC prescaler: set RTC period to 1sec */
RTC_SetDIV(32767);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
#endif
}
return RT_EOK;
}
static rt_err_t rt_rtc_control(rt_device_t dev, int cmd, void *args)
{
rt_err_t result = RT_EOK;
RT_ASSERT(dev != RT_NULL);
switch (cmd)
{
case RT_DEVICE_CTRL_RTC_GET_TIME:
*(rt_uint32_t *)args = get_rtc_timestamp();
LOG_D("RTC: get rtc_time %x\n", *(rt_uint32_t *)args);
break;
case RT_DEVICE_CTRL_RTC_SET_TIME:
if (set_rtc_time_stamp(*(rt_uint32_t *)args))
{
result = -RT_ERROR;
}
LOG_D("RTC: set rtc_time %x\n", *(rt_uint32_t *)args);
break;
}
return result;
}
#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops rtc_ops =
{
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
rt_rtc_control
};
#endif
static rt_err_t rt_hw_rtc_register(rt_device_t device, const char *name, rt_uint32_t flag)
{
RT_ASSERT(device != RT_NULL);
rt_rtc_init();
if (rt_rtc_config(device) != RT_EOK)
{
return -RT_ERROR;
}
#ifdef RT_USING_DEVICE_OPS
device->ops = &rtc_ops;
#else
device->init = RT_NULL;
device->open = RT_NULL;
device->close = RT_NULL;
device->read = RT_NULL;
device->write = RT_NULL;
device->control = rt_rtc_control;
#endif
device->type = RT_Device_Class_RTC;
device->rx_indicate = RT_NULL;
device->tx_complete = RT_NULL;
device->user_data = RT_NULL;
/* register a character device */
return rt_device_register(device, name, flag);
}
int rt_hw_rtc_init(void)
{
rt_err_t result;
result = rt_hw_rtc_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR);
if (result != RT_EOK)
{
LOG_E("rtc register err code: %d", result);
return result;
}
LOG_D("rtc init success");
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_rtc_init);
#endif /* BSP_USING_RTC */
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