mirror of https://github.com/ARMmbed/mbed-os.git
122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
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/* mbed Microcontroller Library
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* Copyright (c) 2015-2016 Nuvoton
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "rtc_api.h"
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#if DEVICE_RTC
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#include "wait_api.h"
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#include "mbed_error.h"
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#include "nu_modutil.h"
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#include "nu_miscutil.h"
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#define YEAR0 1900
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//#define EPOCH_YR 1970
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static int rtc_inited = 0;
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static const struct nu_modinit_s rtc_modinit = {RTC_0, RTC_MODULE, 0, 0, 0, RTC_IRQn, NULL};
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void rtc_init(void)
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{
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if (rtc_inited) {
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return;
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}
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rtc_inited = 1;
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// Enable IP clock
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CLK_EnableModuleClock(rtc_modinit.clkidx);
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RTC_Open(NULL);
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}
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void rtc_free(void)
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{
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// FIXME
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}
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int rtc_isenabled(void)
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{
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return rtc_inited;
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}
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/*
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struct tm
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tm_sec seconds after the minute 0-61
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tm_min minutes after the hour 0-59
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tm_hour hours since midnight 0-23
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tm_mday day of the month 1-31
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tm_mon months since January 0-11
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tm_year years since 1900
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tm_wday days since Sunday 0-6
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tm_yday days since January 1 0-365
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tm_isdst Daylight Saving Time flag
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*/
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time_t rtc_read(void)
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{
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if (! rtc_inited) {
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rtc_init();
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}
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S_RTC_TIME_DATA_T rtc_datetime;
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RTC_GetDateAndTime(&rtc_datetime);
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struct tm timeinfo;
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// Convert struct tm to S_RTC_TIME_DATA_T
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timeinfo.tm_year = rtc_datetime.u32Year - YEAR0;
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timeinfo.tm_mon = rtc_datetime.u32Month - 1;
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timeinfo.tm_mday = rtc_datetime.u32Day;
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timeinfo.tm_wday = rtc_datetime.u32DayOfWeek;
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timeinfo.tm_hour = rtc_datetime.u32Hour;
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timeinfo.tm_min = rtc_datetime.u32Minute;
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timeinfo.tm_sec = rtc_datetime.u32Second;
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// Convert to timestamp
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time_t t = mktime(&timeinfo);
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return t;
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}
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void rtc_write(time_t t)
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{
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if (! rtc_inited) {
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rtc_init();
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}
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// Convert timestamp to struct tm
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struct tm *timeinfo = localtime(&t);
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S_RTC_TIME_DATA_T rtc_datetime;
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// Convert S_RTC_TIME_DATA_T to struct tm
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rtc_datetime.u32Year = timeinfo->tm_year + YEAR0;
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rtc_datetime.u32Month = timeinfo->tm_mon + 1;
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rtc_datetime.u32Day = timeinfo->tm_mday;
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rtc_datetime.u32DayOfWeek = timeinfo->tm_wday;
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rtc_datetime.u32Hour = timeinfo->tm_hour;
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rtc_datetime.u32Minute = timeinfo->tm_min;
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rtc_datetime.u32Second = timeinfo->tm_sec;
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rtc_datetime.u32TimeScale = RTC_CLOCK_24;
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// NOTE: Timing issue with write to RTC registers. This delay is empirical, not rational.
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RTC_SetDateAndTime(&rtc_datetime);
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//nu_nop(6000);
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wait_us(100);
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}
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#endif
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