147 lines
3.4 KiB
C
147 lines
3.4 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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* 2022-03-10 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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#ifndef BKP_DR1
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#define BKP_DR1 RT_NULL
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#endif
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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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return rtc_counter_get();
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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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/* set the rtc counter value */
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rtc_counter_set(time_stamp);
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/* wait until last write operation on rtc registers has finished */
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rtc_wait_config_finish();
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LOG_D("set rtc time.");
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bpr_data_write(BPR_DATA1, 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 pattery powered domain */
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pwc_battery_powered_domain_access(TRUE);
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#ifdef BSP_RTC_USING_LICK
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crm_rtc_clock_select(CRM_RTC_CLOCK_LICK);
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#else
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crm_rtc_clock_select(CRM_RTC_CLOCK_LEXT);
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#endif /* BSP_RTC_USING_LICK */
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/* enable rtc */
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crm_rtc_clock_enable(TRUE);
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/* wait for rtc registers update finish */
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rtc_wait_update_finish();
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/* wait until last write operation on rtc registers has finished */
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rtc_wait_config_finish();
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if (bpr_data_read(BPR_DATA1) != 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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/* set rtc divider: set rtc period to 1sec */
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rtc_divider_set(32767);
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/* wait until last write operation on rtc registers has finished */
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rtc_wait_config_finish();
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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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crm_periph_clock_enable(CRM_BPR_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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crm_periph_clock_enable(CRM_PWC_PERIPH_CLOCK, TRUE);
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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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