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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-03-10 shelton first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <sys/time.h>
#include "board.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 time_t get_rtc_timestamp(void)
{
return rtc_counter_get();
}
static rt_err_t set_rtc_time_stamp(time_t time_stamp)
{
/* set the rtc counter value */
rtc_counter_set(time_stamp);
/* wait until last write operation on rtc registers has finished */
rtc_wait_config_finish();
LOG_D("set rtc time.");
bpr_data_write(BPR_DATA1, BKUP_REG_DATA);
return RT_EOK;
}
static rt_err_t rt_rtc_config(void)
{
/* allow access to pattery powered domain */
pwc_battery_powered_domain_access(TRUE);
#ifdef BSP_RTC_USING_LICK
crm_rtc_clock_select(CRM_RTC_CLOCK_LICK);
#else
crm_rtc_clock_select(CRM_RTC_CLOCK_LEXT);
#endif /* BSP_RTC_USING_LICK */
/* enable rtc */
crm_rtc_clock_enable(TRUE);
/* wait for rtc registers update finish */
rtc_wait_update_finish();
/* wait until last write operation on rtc registers has finished */
rtc_wait_config_finish();
if (bpr_data_read(BPR_DATA1) != BKUP_REG_DATA)
{
LOG_I("RTC hasn't been configured, please use <date> command to config.");
/* set rtc divider: set rtc period to 1sec */
rtc_divider_set(32767);
/* wait until last write operation on rtc registers has finished */
rtc_wait_config_finish();
}
return RT_EOK;
}
static rt_err_t _rtc_init(void)
{
crm_periph_clock_enable(CRM_PWC_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_BPR_PERIPH_CLOCK, TRUE);
#ifdef BSP_RTC_USING_LICK
crm_clock_source_enable(CRM_CLOCK_SOURCE_LICK, TRUE);
while(crm_flag_get(CRM_LICK_STABLE_FLAG) == RESET);
#else
crm_periph_clock_enable(CRM_PWC_PERIPH_CLOCK, TRUE);
pwc_battery_powered_domain_access(TRUE);
crm_clock_source_enable(CRM_CLOCK_SOURCE_LEXT, TRUE);
while(crm_flag_get(CRM_LEXT_STABLE_FLAG) == RESET);
#endif /* BSP_RTC_USING_LICK */
if (rt_rtc_config() != RT_EOK)
{
LOG_E("rtc init failed.");
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t _rtc_get_secs(void *args)
{
*(rt_uint32_t *)args = get_rtc_timestamp();
LOG_D("RTC: get rtc_time %x\n", *(rt_uint32_t *)args);
return RT_EOK;
}
static rt_err_t _rtc_set_secs(void *args)
{
rt_err_t result = RT_EOK;
if (set_rtc_time_stamp(*(rt_uint32_t *)args))
{
result = -RT_ERROR;
}
LOG_D("RTC: set rtc_time %x\n", *(rt_uint32_t *)args);
return result;
}
static const struct rt_rtc_ops _rtc_ops =
{
_rtc_init,
_rtc_get_secs,
_rtc_set_secs,
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
};
static rt_rtc_dev_t at32_rtc_dev;
int rt_hw_rtc_init(void)
{
rt_err_t result;
at32_rtc_dev.ops = &_rtc_ops;
result = rt_hw_rtc_register(&at32_rtc_dev, "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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