132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
/*
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* Copyright (c) 2006-2023, 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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* 2022-01-21 charlown 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 LOG_TAG "drv.rtc"
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#include "drv_log.h"
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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 BKUP_REG_DATA 0xA5A5
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static struct rt_rtc_device rtc;
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static void rt_rtc_config(void)
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{
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/* Allow access to BKP Domain */
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PWR_BackupAccessCmd(ENABLE);
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#if defined(BSP_USING_RTC_LSI) && defined(LSI_VALUE)
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RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
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#else
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RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
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#endif
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RCC_RTCCLKCmd(ENABLE);
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RTC_WaitForLastTask();
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RTC_WaitForSynchro();
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if (BKP_ReadBackupRegister(BKP_DR1) != 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 prescaler: set RTC period to 1sec */
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RTC_SetPrescaler(32767);
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/* Wait until last write operation on RTC registers has finished */
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RTC_WaitForLastTask();
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}
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}
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static rt_err_t ch32f2_rt_rtc_init(void)
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{
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
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PWR_BackupAccessCmd(ENABLE);
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#if defined(BSP_USING_RTC_LSI) && defined(LSI_VALUE)
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RCC_LSICmd(ENABLE);
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while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
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;
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#else
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RCC_LSEConfig(RCC_LSE_ON);
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while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
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;
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#endif
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rt_rtc_config();
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return RT_EOK;
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}
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static rt_err_t ch32f2_get_secs(time_t *args)
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{
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*(rt_uint32_t *)args = RTC_GetCounter();
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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 ch32f2_set_secs(time_t *args)
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{
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/* Set the RTC counter value */
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RTC_SetCounter(*(rt_uint32_t *)args);
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/* Wait until last write operation on RTC registers has finished */
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RTC_WaitForLastTask();
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LOG_D("set rtc time.");
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BKP_WriteBackupRegister(BKP_DR1, BKUP_REG_DATA);
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LOG_D("RTC: set rtc_time %x\n", *(rt_uint32_t *)args);
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return RT_EOK;
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}
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const static struct rt_rtc_ops rtc_ops =
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{
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.init = ch32f2_rt_rtc_init,
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.get_secs = ch32f2_get_secs,
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.set_secs = ch32f2_set_secs,
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.get_alarm = RT_NULL,
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.set_alarm = RT_NULL,
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.get_timeval = RT_NULL,
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.set_timeval = RT_NULL};
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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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rtc.ops = &rtc_ops;
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result = rt_hw_rtc_register(&rtc, "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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