/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2022-03-28 shelton first version */ #include #include #include #include "board.h" #ifdef BSP_USING_RTC //#define DRV_DEBUG #define LOG_TAG "drv.rtc" #include #define BKUP_REG_DATA 0xA5A5 static time_t get_rtc_timestamp(void) { struct tm tm_new; ertc_time_type ertc_time_struct; ertc_calendar_get(&ertc_time_struct); tm_new.tm_sec = ertc_time_struct.sec; tm_new.tm_min = ertc_time_struct.min; tm_new.tm_hour = ertc_time_struct.hour; tm_new.tm_mday = ertc_time_struct.day; tm_new.tm_mon = ertc_time_struct.month - 1; tm_new.tm_year = ertc_time_struct.year + 100; LOG_D("get rtc time."); return timegm(&tm_new); } static rt_err_t set_rtc_time_stamp(time_t time_stamp) { struct tm *p_tm; p_tm = gmtime(&time_stamp); if (p_tm->tm_year < 100) { return -RT_ERROR; } /* set time */ if(ertc_time_set(p_tm->tm_hour, p_tm->tm_min, p_tm->tm_sec, ERTC_AM) != SUCCESS) { return -RT_ERROR; } /* set date */ if(ertc_date_set(p_tm->tm_year - 100, p_tm->tm_mon + 1, p_tm->tm_mday, p_tm->tm_wday + 1) != SUCCESS) { return -RT_ERROR; } LOG_D("set rtc time."); /* indicator for the ertc configuration */ ertc_bpr_data_write(ERTC_DT1, BKUP_REG_DATA); return RT_EOK; } static rt_err_t rt_rtc_config(void) { /* allow access to battery powered domain */ pwc_battery_powered_domain_access(TRUE); /* select rtc clock source */ #ifdef BSP_RTC_USING_LICK crm_ertc_clock_select(CRM_ERTC_CLOCK_LICK); #else crm_ertc_clock_select(CRM_ERTC_CLOCK_LEXT); #endif /* BSP_RTC_USING_LICK */ /* enable rtc */ crm_ertc_clock_enable(TRUE); /* wait for ertc registers update */ ertc_wait_update(); if (ertc_bpr_data_read(ERTC_DT1)!= BKUP_REG_DATA) { LOG_I("RTC hasn't been configured, please use command to config."); /* configure the ertc divider */ ertc_divider_set(0x7F, 0xFF); /* configure the ertc hour mode */ ertc_hour_mode_set(ERTC_HOUR_MODE_24); } return RT_EOK; } static rt_err_t _rtc_init(void) { crm_periph_clock_enable(CRM_PWC_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 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 */