/* * 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 #include #include #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 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(void *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(void *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 */