176 lines
3.8 KiB
C
176 lines
3.8 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2022-03-28 shelton first version
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <sys/time.h>
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#include "board.h"
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#ifdef BSP_USING_RTC
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//#define DRV_DEBUG
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#define LOG_TAG "drv.rtc"
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#include <drv_log.h>
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#define BKUP_REG_DATA 0xA5A5
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static time_t get_rtc_timestamp(void)
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{
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struct tm tm_new;
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ertc_time_type ertc_time_struct;
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ertc_calendar_get(&ertc_time_struct);
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tm_new.tm_sec = ertc_time_struct.sec;
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tm_new.tm_min = ertc_time_struct.min;
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tm_new.tm_hour = ertc_time_struct.hour;
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tm_new.tm_mday = ertc_time_struct.day;
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tm_new.tm_mon = ertc_time_struct.month - 1;
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tm_new.tm_year = ertc_time_struct.year + 100;
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LOG_D("get rtc time.");
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return timegm(&tm_new);
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}
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static rt_err_t set_rtc_time_stamp(time_t time_stamp)
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{
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struct tm *p_tm;
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p_tm = gmtime(&time_stamp);
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if (p_tm->tm_year < 100)
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{
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return -RT_ERROR;
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}
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/* set time */
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if(ertc_time_set(p_tm->tm_hour, p_tm->tm_min, p_tm->tm_sec, ERTC_AM) != SUCCESS)
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{
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return -RT_ERROR;
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}
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/* set date */
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if(ertc_date_set(p_tm->tm_year - 100, p_tm->tm_mon + 1, p_tm->tm_mday, p_tm->tm_wday + 1) != SUCCESS)
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{
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return -RT_ERROR;
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}
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LOG_D("set rtc time.");
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/* indicator for the ertc configuration */
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ertc_bpr_data_write(ERTC_DT1, BKUP_REG_DATA);
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return RT_EOK;
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}
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static rt_err_t rt_rtc_config(void)
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{
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/* allow access to battery powered domain */
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pwc_battery_powered_domain_access(TRUE);
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/* select rtc clock source */
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#ifdef BSP_RTC_USING_LICK
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crm_ertc_clock_select(CRM_ERTC_CLOCK_LICK);
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#else
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crm_ertc_clock_select(CRM_ERTC_CLOCK_LEXT);
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#endif /* BSP_RTC_USING_LICK */
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/* enable rtc */
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crm_ertc_clock_enable(TRUE);
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/* wait for ertc registers update */
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ertc_wait_update();
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if (ertc_bpr_data_read(ERTC_DT1)!= BKUP_REG_DATA)
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{
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LOG_I("RTC hasn't been configured, please use <date> command to config.");
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/* configure the ertc divider */
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ertc_divider_set(0x7F, 0xFF);
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/* configure the ertc hour mode */
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ertc_hour_mode_set(ERTC_HOUR_MODE_24);
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}
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return RT_EOK;
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}
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static rt_err_t _rtc_init(void)
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{
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crm_periph_clock_enable(CRM_PWC_PERIPH_CLOCK, TRUE);
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#ifdef BSP_RTC_USING_LICK
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crm_clock_source_enable(CRM_CLOCK_SOURCE_LICK, TRUE);
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while(crm_flag_get(CRM_LICK_STABLE_FLAG) == RESET);
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#else
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pwc_battery_powered_domain_access(TRUE);
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crm_clock_source_enable(CRM_CLOCK_SOURCE_LEXT, TRUE);
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while(crm_flag_get(CRM_LEXT_STABLE_FLAG) == RESET);
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#endif /* BSP_RTC_USING_LICK */
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if (rt_rtc_config() != RT_EOK)
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{
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LOG_E("rtc init failed.");
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return -RT_ERROR;
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}
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return RT_EOK;
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}
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static rt_err_t _rtc_get_secs(void *args)
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{
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*(rt_uint32_t *)args = get_rtc_timestamp();
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LOG_D("RTC: get rtc_time %x\n", *(rt_uint32_t *)args);
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return RT_EOK;
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}
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static rt_err_t _rtc_set_secs(void *args)
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{
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rt_err_t result = RT_EOK;
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if (set_rtc_time_stamp(*(rt_uint32_t *)args))
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{
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result = -RT_ERROR;
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}
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LOG_D("RTC: set rtc_time %x\n", *(rt_uint32_t *)args);
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return result;
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}
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static const struct rt_rtc_ops _rtc_ops =
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{
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_rtc_init,
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_rtc_get_secs,
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_rtc_set_secs,
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RT_NULL,
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RT_NULL,
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RT_NULL,
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RT_NULL,
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};
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static rt_rtc_dev_t at32_rtc_dev;
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int rt_hw_rtc_init(void)
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{
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rt_err_t result;
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at32_rtc_dev.ops = &_rtc_ops;
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result = rt_hw_rtc_register(&at32_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR,RT_NULL);
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if (result != RT_EOK)
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{
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LOG_E("rtc register err code: %d", result);
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return result;
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}
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LOG_D("rtc init success");
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return RT_EOK;
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}
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INIT_DEVICE_EXPORT(rt_hw_rtc_init);
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#endif /* BSP_USING_RTC */
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