/* * Copyright (c) 2006-2022, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2022-10-19 Nations first version */ #include "board.h" #include #include #ifdef BSP_USING_RTC uint32_t SynchPrediv, AsynchPrediv; static rt_err_t n32_rtc_get_timeval(struct timeval *tv) { struct tm tm_new = {0}; RTC_DateType RTC_DateStructure; RTC_TimeType RTC_TimeStructure; RTC_GetTime(RTC_FORMAT_BIN, &RTC_TimeStructure); RTC_GetDate(RTC_FORMAT_BIN, &RTC_DateStructure); tm_new.tm_sec = RTC_TimeStructure.Seconds; tm_new.tm_min = RTC_TimeStructure.Minutes; tm_new.tm_hour = RTC_TimeStructure.Hours; tm_new.tm_wday = RTC_DateStructure.WeekDay; tm_new.tm_mday = RTC_DateStructure.Date; tm_new.tm_mon = RTC_DateStructure.Month - 1; tm_new.tm_year = RTC_DateStructure.Year + 100; tv->tv_sec = timegm(&tm_new); return RT_EOK; } static rt_err_t set_rtc_time_stamp(time_t time_stamp) { struct tm time = {0}; RTC_DateType RTC_DateStructure={0}; RTC_TimeType RTC_TimeStructure={0}; gmtime_r(&time_stamp, &time); if (time.tm_year < 100) { return -RT_ERROR; } RTC_TimeStructure.Seconds = time.tm_sec ; RTC_TimeStructure.Minutes = time.tm_min ; RTC_TimeStructure.Hours = time.tm_hour; RTC_DateStructure.Date = time.tm_mday; RTC_DateStructure.Month = time.tm_mon + 1 ; RTC_DateStructure.Year = time.tm_year - 100; RTC_DateStructure.WeekDay = time.tm_wday + 1; /* Configure the RTC date register */ if (RTC_SetDate(RTC_FORMAT_BIN, &RTC_DateStructure) != SUCCESS) { return -RT_ERROR; } /* Configure the RTC time register */ if (RTC_ConfigTime(RTC_FORMAT_BIN, &RTC_TimeStructure) != SUCCESS) { return -RT_ERROR; } rt_kprintf("set rtc time.\n"); return RT_EOK; } static rt_err_t rt_rtc_config(void) { RTC_InitType RTC_InitStructure; /* Configure the RTC data register and RTC prescaler */ RTC_InitStructure.RTC_AsynchPrediv = AsynchPrediv; RTC_InitStructure.RTC_SynchPrediv = SynchPrediv; RTC_InitStructure.RTC_HourFormat = RTC_24HOUR_FORMAT; /* Check on RTC init */ if (RTC_Init(&RTC_InitStructure) != SUCCESS) { return -RT_ERROR; } return RT_EOK; } static rt_err_t n32_rtc_init(void) { /* Enable the PWR clock */ #if defined(SOC_N32G45X) || defined(SOC_N32WB452) || defined(SOC_N32G4FR) RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_PWR | RCC_APB1_PERIPH_BKP, ENABLE); RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_AFIO, ENABLE); #elif defined(SOC_N32L43X) || defined(SOC_N32L40X) || defined(SOC_N32G43X) RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_PWR, ENABLE); RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_AFIO, ENABLE); #endif /* Allow access to RTC */ PWR_BackupAccessEnable(ENABLE); #if defined(SOC_N32G45X) || defined(SOC_N32WB452) /* Reset Backup */ BKP_DeInit(); #endif /* Disable RTC clock */ RCC_EnableRtcClk(DISABLE); #ifdef BSP_RTC_USING_HSE /* Enable the HSE OSC */ RCC_EnableLsi(DISABLE); RCC_ConfigHse(RCC_HSE_ENABLE); while (RCC_WaitHseStable() == ERROR) { } #if defined(SOC_N32G45X) || defined(SOC_N32WB452) || defined(SOC_N32G4FR) rt_kprintf("rtc clock source is set hse/128!\n"); RCC_ConfigRtcClk(RCC_RTCCLK_SRC_HSE_DIV128); #elif defined(SOC_N32L43X) || defined(SOC_N32L40X) || defined(SOC_N32G43X) rt_kprintf("rtc clock source is set hse/32!\n"); RCC_ConfigRtcClk(RCC_RTCCLK_SRC_HSE_DIV32); #endif #if defined(SOC_N32G45X) || defined(SOC_N32WB452) || defined(SOC_N32G4FR) SynchPrediv = 0x1E8; // 8M/128 = 62.5KHz AsynchPrediv = 0x7F; // value range: 0-7F #elif defined(SOC_N32L43X) || defined(SOC_N32L40X) || defined(SOC_N32G43X) SynchPrediv = 0x7A0; // 8M/32 = 250KHz AsynchPrediv = 0x7F; // value range: 0-7F #endif #endif /* BSP_RTC_USING_HSE */ #ifdef BSP_RTC_USING_LSE rt_kprintf("rtc clock source is set lse!\n"); /* Enable the LSE OSC32_IN PC14 */ RCC_EnableLsi(DISABLE); // LSI is turned off here to ensure that only one clock is turned on #if defined(SOC_N32G45X) || defined(SOC_N32WB452) || defined(SOC_N32G4FR) RCC_ConfigLse(RCC_LSE_ENABLE); while (RCC_GetFlagStatus(RCC_FLAG_LSERD) == RESET) { } #elif defined(SOC_N32L43X) || defined(SOC_N32L40X) || defined(SOC_N32G43X) RCC_ConfigLse(RCC_LSE_ENABLE,0x28); while (RCC_GetFlagStatus(RCC_LDCTRL_FLAG_LSERD) == RESET) { } #endif RCC_ConfigRtcClk(RCC_RTCCLK_SRC_LSE); SynchPrediv = 0xFF; // 32.768KHz AsynchPrediv = 0x7F; // value range: 0-7F #endif /* BSP_RTC_USING_LSE */ #ifdef BSP_RTC_USING_LSI rt_kprintf("rtc clock source is set lsi!\n"); /* Enable the LSI OSC */ RCC_EnableLsi(ENABLE); #if defined(SOC_N32G45X) || defined(SOC_N32WB452) || defined(SOC_N32G4FR) while (RCC_GetFlagStatus(RCC_FLAG_LSIRD) == RESET) { } #elif defined(SOC_N32L43X) || defined(SOC_N32L40X) || defined(SOC_N32G43X) while (RCC_GetFlagStatus(RCC_CTRLSTS_FLAG_LSIRD) == RESET) { } #endif RCC_ConfigRtcClk(RCC_RTCCLK_SRC_LSI); #if defined(SOC_N32G45X) || defined(SOC_N32WB452) || defined(SOC_N32G4FR) SynchPrediv = 0x136; // 39.64928KHz AsynchPrediv = 0x7F; // value range: 0-7F #elif defined(SOC_N32L43X) || defined(SOC_N32L40X) || defined(SOC_N32G43X) SynchPrediv = 0x14A; // 41828Hz AsynchPrediv = 0x7F; // value range: 0-7F #endif #endif /* BSP_RTC_USING_LSI */ /* Enable the RTC Clock */ RCC_EnableRtcClk(ENABLE); RTC_WaitForSynchro(); if (rt_rtc_config() != RT_EOK) { rt_kprintf("rtc init failed.\n"); return -RT_ERROR; } return RT_EOK; } static rt_err_t n32_rtc_get_secs(time_t *sec) { struct timeval tv; n32_rtc_get_timeval(&tv); *(time_t *) sec = tv.tv_sec; rt_kprintf("RTC: get rtc_time %d.\n", *sec); return RT_EOK; } static rt_err_t n32_rtc_set_secs(time_t *sec) { rt_err_t result = RT_EOK; if (set_rtc_time_stamp(*sec)) { result = -RT_ERROR; } rt_kprintf("RTC: set rtc_time %d.\n", *sec); return result; } static const struct rt_rtc_ops n32_rtc_ops = { n32_rtc_init, n32_rtc_get_secs, n32_rtc_set_secs, RT_NULL, RT_NULL, n32_rtc_get_timeval, RT_NULL, }; static rt_rtc_dev_t n32_rtc_dev; static int rt_hw_rtc_init(void) { rt_err_t result; n32_rtc_dev.ops = &n32_rtc_ops; result = rt_hw_rtc_register(&n32_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR, RT_NULL); if (result != RT_EOK) { rt_kprintf("rtc register error code: %d.\n", result); return result; } else { rt_kprintf("rtc initialize success.\n"); } return RT_EOK; } INIT_DEVICE_EXPORT(rt_hw_rtc_init); #endif /* BSP_USING_RTC */