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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-08-10 charlown first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <sys/time.h>
#include "board.h"
#ifdef BSP_USING_RTC
#define LOG_TAG "drv.rtc"
#include "drv_log.h"
#ifndef BKP_DR1
#define BKP_DR1 RT_NULL
#endif
#define BKUP_REG_DATA 0xA5A5
static struct rt_rtc_device rtc;
static void rt_rtc_config(void)
{
/* Allow access to BKP Domain */
PWR_BackupAccessCmd(ENABLE);
#if defined(BSP_USING_RTC_LSI) && defined(LSI_VALUE)
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
#else
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
#endif
RCC_RTCCLKCmd(ENABLE);
RTC_WaitForLastTask();
RTC_WaitForSynchro();
if (BKP_ReadBackupRegister(BKP_DR1) != BKUP_REG_DATA)
{
LOG_I("RTC hasn't been configured, please use <date> command to config.");
/* Set RTC prescaler: set RTC period to 1sec */
RTC_SetPrescaler(32767);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
}
static rt_err_t ch32f1_rt_rtc_init(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
PWR_BackupAccessCmd(ENABLE);
#if defined(BSP_USING_RTC_LSI) && defined(LSI_VALUE)
RCC_LSICmd(ENABLE);
while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
;
#else
RCC_LSEConfig(RCC_LSE_ON);
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
;
#endif
rt_rtc_config();
return RT_EOK;
}
static rt_err_t ch32f1_get_secs(time_t *args)
{
*(rt_uint32_t *)args = RTC_GetCounter();
LOG_D("RTC: get rtc_time %x\n", *(rt_uint32_t *)args);
return RT_EOK;
}
static rt_err_t ch32f1_set_secs(time_t *args)
{
/* Set the RTC counter value */
RTC_SetCounter(*(rt_uint32_t *)args);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
LOG_D("set rtc time.");
BKP_WriteBackupRegister(BKP_DR1, BKUP_REG_DATA);
LOG_D("RTC: set rtc_time %x\n", *(rt_uint32_t *)args);
return RT_EOK;
}
const static struct rt_rtc_ops rtc_ops =
{
.init = ch32f1_rt_rtc_init,
.get_secs = ch32f1_get_secs,
.set_secs = ch32f1_set_secs,
.get_alarm = RT_NULL,
.set_alarm = RT_NULL,
.get_timeval = RT_NULL,
.set_timeval = RT_NULL};
int rt_hw_rtc_init(void)
{
rt_err_t result;
rtc.ops = &rtc_ops;
result = rt_hw_rtc_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR, RT_NULL);
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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