John Karatka / mbed

mbed

Fork of mbed-dev by mbed official

targets/TARGET_NUVOTON/TARGET_NANO100/rtc_api.c@182:57724642e740, 2018-02-16 (annotated)

Committer:
AnnaBridge
Date:
Fri Feb 16 16:09:33 2018 +0000
Revision:
182:57724642e740
Parent:
177:447f873cad2f 
mbed-dev library. Release version 159.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 175:b96e65c34a4d 1 /* mbed Microcontroller Library
AnnaBridge 175:b96e65c34a4d 2 * Copyright (c) 2015-2017 Nuvoton
AnnaBridge 175:b96e65c34a4d 3 *
AnnaBridge 175:b96e65c34a4d 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 175:b96e65c34a4d 5 * you may not use this file except in compliance with the License.
AnnaBridge 175:b96e65c34a4d 6 * You may obtain a copy of the License at
AnnaBridge 175:b96e65c34a4d 7 *
AnnaBridge 175:b96e65c34a4d 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 175:b96e65c34a4d 9 *
AnnaBridge 175:b96e65c34a4d 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 175:b96e65c34a4d 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 175:b96e65c34a4d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 175:b96e65c34a4d 13 * See the License for the specific language governing permissions and
AnnaBridge 175:b96e65c34a4d 14 * limitations under the License.
AnnaBridge 175:b96e65c34a4d 15 */
AnnaBridge 175:b96e65c34a4d 16
AnnaBridge 175:b96e65c34a4d 17 #include "rtc_api.h"
AnnaBridge 175:b96e65c34a4d 18
AnnaBridge 175:b96e65c34a4d 19 #if DEVICE_RTC
AnnaBridge 175:b96e65c34a4d 20
AnnaBridge 175:b96e65c34a4d 21 #include "mbed_wait_api.h"
AnnaBridge 175:b96e65c34a4d 22 #include "mbed_error.h"
AnnaBridge 175:b96e65c34a4d 23 #include "nu_modutil.h"
AnnaBridge 175:b96e65c34a4d 24 #include "nu_miscutil.h"
AnnaBridge 175:b96e65c34a4d 25 #include "mbed_mktime.h"
AnnaBridge 175:b96e65c34a4d 26
AnnaBridge 175:b96e65c34a4d 27 #define YEAR0 1900
AnnaBridge 175:b96e65c34a4d 28
AnnaBridge 175:b96e65c34a4d 29
AnnaBridge 175:b96e65c34a4d 30 static const struct nu_modinit_s rtc_modinit = {RTC_0, RTC_MODULE, 0, 0, 0, RTC_IRQn, NULL};
AnnaBridge 175:b96e65c34a4d 31
AnnaBridge 175:b96e65c34a4d 32 void rtc_init(void)
AnnaBridge 175:b96e65c34a4d 33 {
AnnaBridge 175:b96e65c34a4d 34 if (rtc_isenabled()) {
AnnaBridge 175:b96e65c34a4d 35 return;
AnnaBridge 175:b96e65c34a4d 36 }
AnnaBridge 175:b96e65c34a4d 37
AnnaBridge 175:b96e65c34a4d 38 RTC_Open(NULL);
AnnaBridge 175:b96e65c34a4d 39 }
AnnaBridge 175:b96e65c34a4d 40
AnnaBridge 175:b96e65c34a4d 41 void rtc_free(void)
AnnaBridge 175:b96e65c34a4d 42 {
AnnaBridge 175:b96e65c34a4d 43 // N/A
AnnaBridge 175:b96e65c34a4d 44 }
AnnaBridge 175:b96e65c34a4d 45
AnnaBridge 175:b96e65c34a4d 46 int rtc_isenabled(void)
AnnaBridge 175:b96e65c34a4d 47 {
AnnaBridge 175:b96e65c34a4d 48 // NOTE: To access (RTC) registers, clock must be enabled first.
AnnaBridge 175:b96e65c34a4d 49 if (! (CLK->APBCLK & CLK_APBCLK_RTC_EN_Msk)) {
AnnaBridge 175:b96e65c34a4d 50 // Enable IP clock
AnnaBridge 175:b96e65c34a4d 51 CLK_EnableModuleClock(rtc_modinit.clkidx);
AnnaBridge 175:b96e65c34a4d 52 }
AnnaBridge 175:b96e65c34a4d 53
AnnaBridge 175:b96e65c34a4d 54 // NOTE: Check RTC Init Active flag to support crossing reset cycle.
AnnaBridge 175:b96e65c34a4d 55 return !! (RTC->INIR & RTC_INIR_ACTIVE_Msk);
AnnaBridge 175:b96e65c34a4d 56 }
AnnaBridge 175:b96e65c34a4d 57
AnnaBridge 175:b96e65c34a4d 58 /*
AnnaBridge 175:b96e65c34a4d 59 struct tm
AnnaBridge 175:b96e65c34a4d 60 tm_sec seconds after the minute 0-61
AnnaBridge 175:b96e65c34a4d 61 tm_min minutes after the hour 0-59
AnnaBridge 175:b96e65c34a4d 62 tm_hour hours since midnight 0-23
AnnaBridge 175:b96e65c34a4d 63 tm_mday day of the month 1-31
AnnaBridge 175:b96e65c34a4d 64 tm_mon months since January 0-11
AnnaBridge 175:b96e65c34a4d 65 tm_year years since 1900
AnnaBridge 175:b96e65c34a4d 66 tm_wday days since Sunday 0-6
AnnaBridge 175:b96e65c34a4d 67 tm_yday days since January 1 0-365
AnnaBridge 175:b96e65c34a4d 68 tm_isdst Daylight Saving Time flag
AnnaBridge 175:b96e65c34a4d 69 */
AnnaBridge 175:b96e65c34a4d 70
AnnaBridge 175:b96e65c34a4d 71 time_t rtc_read(void)
AnnaBridge 175:b96e65c34a4d 72 {
AnnaBridge 175:b96e65c34a4d 73 // NOTE: After boot, RTC time registers are not synced immediately, about 1 sec latency.
AnnaBridge 175:b96e65c34a4d 74 // RTC time got (through RTC_GetDateAndTime()) in this sec would be last-synced and incorrect.
AnnaBridge 175:b96e65c34a4d 75 if (! rtc_isenabled()) {
AnnaBridge 175:b96e65c34a4d 76 rtc_init();
AnnaBridge 175:b96e65c34a4d 77 }
AnnaBridge 175:b96e65c34a4d 78
AnnaBridge 175:b96e65c34a4d 79 S_RTC_TIME_DATA_T rtc_datetime;
AnnaBridge 175:b96e65c34a4d 80 RTC_GetDateAndTime(&rtc_datetime);
AnnaBridge 175:b96e65c34a4d 81
AnnaBridge 175:b96e65c34a4d 82 struct tm timeinfo;
AnnaBridge 175:b96e65c34a4d 83
AnnaBridge 175:b96e65c34a4d 84 // Convert struct tm to S_RTC_TIME_DATA_T
AnnaBridge 175:b96e65c34a4d 85 timeinfo.tm_year = rtc_datetime.u32Year - YEAR0;
AnnaBridge 175:b96e65c34a4d 86 timeinfo.tm_mon = rtc_datetime.u32Month - 1;
AnnaBridge 175:b96e65c34a4d 87 timeinfo.tm_mday = rtc_datetime.u32Day;
AnnaBridge 175:b96e65c34a4d 88 timeinfo.tm_wday = rtc_datetime.u32DayOfWeek;
AnnaBridge 175:b96e65c34a4d 89 timeinfo.tm_hour = rtc_datetime.u32Hour;
AnnaBridge 177:447f873cad2f 90 if (rtc_datetime.u32TimeScale == RTC_CLOCK_12 && rtc_datetime.u32AmPm == RTC_PM) {
AnnaBridge 177:447f873cad2f 91 timeinfo.tm_hour += 12;
AnnaBridge 177:447f873cad2f 92 }
AnnaBridge 175:b96e65c34a4d 93 timeinfo.tm_min = rtc_datetime.u32Minute;
AnnaBridge 175:b96e65c34a4d 94 timeinfo.tm_sec = rtc_datetime.u32Second;
AnnaBridge 175:b96e65c34a4d 95
AnnaBridge 175:b96e65c34a4d 96 // Convert to timestamp
AnnaBridge 175:b96e65c34a4d 97 time_t t = _rtc_mktime(&timeinfo);
AnnaBridge 175:b96e65c34a4d 98
AnnaBridge 175:b96e65c34a4d 99 return t;
AnnaBridge 175:b96e65c34a4d 100 }
AnnaBridge 175:b96e65c34a4d 101
AnnaBridge 175:b96e65c34a4d 102 void rtc_write(time_t t)
AnnaBridge 175:b96e65c34a4d 103 {
AnnaBridge 175:b96e65c34a4d 104 if (! rtc_isenabled()) {
AnnaBridge 175:b96e65c34a4d 105 rtc_init();
AnnaBridge 175:b96e65c34a4d 106 }
AnnaBridge 175:b96e65c34a4d 107
AnnaBridge 175:b96e65c34a4d 108 // Convert timestamp to struct tm
AnnaBridge 175:b96e65c34a4d 109 struct tm timeinfo;
AnnaBridge 175:b96e65c34a4d 110 if (_rtc_localtime(t, &timeinfo) == false) {
AnnaBridge 175:b96e65c34a4d 111 return;
AnnaBridge 175:b96e65c34a4d 112 }
AnnaBridge 175:b96e65c34a4d 113
AnnaBridge 175:b96e65c34a4d 114 S_RTC_TIME_DATA_T rtc_datetime;
AnnaBridge 175:b96e65c34a4d 115
AnnaBridge 175:b96e65c34a4d 116 // Convert S_RTC_TIME_DATA_T to struct tm
AnnaBridge 175:b96e65c34a4d 117 rtc_datetime.u32Year = timeinfo.tm_year + YEAR0;
AnnaBridge 175:b96e65c34a4d 118 rtc_datetime.u32Month = timeinfo.tm_mon + 1;
AnnaBridge 175:b96e65c34a4d 119 rtc_datetime.u32Day = timeinfo.tm_mday;
AnnaBridge 175:b96e65c34a4d 120 rtc_datetime.u32DayOfWeek = timeinfo.tm_wday;
AnnaBridge 175:b96e65c34a4d 121 rtc_datetime.u32Hour = timeinfo.tm_hour;
AnnaBridge 175:b96e65c34a4d 122 rtc_datetime.u32Minute = timeinfo.tm_min;
AnnaBridge 175:b96e65c34a4d 123 rtc_datetime.u32Second = timeinfo.tm_sec;
AnnaBridge 175:b96e65c34a4d 124 rtc_datetime.u32TimeScale = RTC_CLOCK_24;
AnnaBridge 175:b96e65c34a4d 125
AnnaBridge 175:b96e65c34a4d 126 RTC_SetDateAndTime(&rtc_datetime);
AnnaBridge 175:b96e65c34a4d 127 // Wait 3 cycles of engine clock to ensure previous CTL write action is finish
AnnaBridge 175:b96e65c34a4d 128 wait_us(30 * 3);
AnnaBridge 175:b96e65c34a4d 129 }
AnnaBridge 175:b96e65c34a4d 130
AnnaBridge 175:b96e65c34a4d 131 #endif