siva surendar / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/TARGET_NUVOTON/TARGET_M451/rtc_api.c@150:da61ba4e9755, 2016-11-25 (annotated)

Committer:
sivasuren
Date:
Fri Nov 25 07:57:40 2016 +0000
Revision:
150:da61ba4e9755
Parent:
149:156823d33999 
surendar changes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2015-2016 Nuvoton
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16
<> 144:ef7eb2e8f9f7 17 #include "rtc_api.h"
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #if DEVICE_RTC
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 #include "wait_api.h"
<> 144:ef7eb2e8f9f7 22 #include "mbed_error.h"
<> 144:ef7eb2e8f9f7 23 #include "nu_modutil.h"
<> 144:ef7eb2e8f9f7 24 #include "nu_miscutil.h"
<> 144:ef7eb2e8f9f7 25
<> 144:ef7eb2e8f9f7 26 #define YEAR0 1900
<> 144:ef7eb2e8f9f7 27 //#define EPOCH_YR 1970
<> 144:ef7eb2e8f9f7 28 static int rtc_inited = 0;
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 static const struct nu_modinit_s rtc_modinit = {RTC_0, RTC_MODULE, 0, 0, 0, RTC_IRQn, NULL};
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 void rtc_init(void)
<> 144:ef7eb2e8f9f7 33 {
<> 144:ef7eb2e8f9f7 34 if (rtc_inited) {
<> 144:ef7eb2e8f9f7 35 return;
<> 144:ef7eb2e8f9f7 36 }
<> 144:ef7eb2e8f9f7 37 rtc_inited = 1;
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 // Enable IP clock
<> 144:ef7eb2e8f9f7 40 CLK_EnableModuleClock(rtc_modinit.clkidx);
<> 144:ef7eb2e8f9f7 41
<> 144:ef7eb2e8f9f7 42 RTC_Open(NULL);
<> 144:ef7eb2e8f9f7 43 }
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 void rtc_free(void)
<> 144:ef7eb2e8f9f7 46 {
<> 144:ef7eb2e8f9f7 47 // FIXME
<> 144:ef7eb2e8f9f7 48 }
<> 144:ef7eb2e8f9f7 49
<> 144:ef7eb2e8f9f7 50 int rtc_isenabled(void)
<> 144:ef7eb2e8f9f7 51 {
<> 144:ef7eb2e8f9f7 52 return rtc_inited;
<> 144:ef7eb2e8f9f7 53 }
<> 144:ef7eb2e8f9f7 54
<> 144:ef7eb2e8f9f7 55 /*
<> 144:ef7eb2e8f9f7 56 struct tm
<> 144:ef7eb2e8f9f7 57 tm_sec seconds after the minute 0-61
<> 144:ef7eb2e8f9f7 58 tm_min minutes after the hour 0-59
<> 144:ef7eb2e8f9f7 59 tm_hour hours since midnight 0-23
<> 144:ef7eb2e8f9f7 60 tm_mday day of the month 1-31
<> 144:ef7eb2e8f9f7 61 tm_mon months since January 0-11
<> 144:ef7eb2e8f9f7 62 tm_year years since 1900
<> 144:ef7eb2e8f9f7 63 tm_wday days since Sunday 0-6
<> 144:ef7eb2e8f9f7 64 tm_yday days since January 1 0-365
<> 144:ef7eb2e8f9f7 65 tm_isdst Daylight Saving Time flag
<> 144:ef7eb2e8f9f7 66 */
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 time_t rtc_read(void)
<> 144:ef7eb2e8f9f7 69 {
<> 144:ef7eb2e8f9f7 70 if (! rtc_inited) {
<> 144:ef7eb2e8f9f7 71 rtc_init();
<> 144:ef7eb2e8f9f7 72 }
<> 144:ef7eb2e8f9f7 73
<> 144:ef7eb2e8f9f7 74 S_RTC_TIME_DATA_T rtc_datetime;
<> 144:ef7eb2e8f9f7 75 RTC_GetDateAndTime(&rtc_datetime);
<> 144:ef7eb2e8f9f7 76
<> 144:ef7eb2e8f9f7 77 struct tm timeinfo;
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 // Convert struct tm to S_RTC_TIME_DATA_T
<> 144:ef7eb2e8f9f7 80 timeinfo.tm_year = rtc_datetime.u32Year - YEAR0;
<> 144:ef7eb2e8f9f7 81 timeinfo.tm_mon = rtc_datetime.u32Month - 1;
<> 144:ef7eb2e8f9f7 82 timeinfo.tm_mday = rtc_datetime.u32Day;
<> 144:ef7eb2e8f9f7 83 timeinfo.tm_wday = rtc_datetime.u32DayOfWeek;
<> 144:ef7eb2e8f9f7 84 timeinfo.tm_hour = rtc_datetime.u32Hour;
<> 144:ef7eb2e8f9f7 85 timeinfo.tm_min = rtc_datetime.u32Minute;
<> 144:ef7eb2e8f9f7 86 timeinfo.tm_sec = rtc_datetime.u32Second;
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 // Convert to timestamp
<> 144:ef7eb2e8f9f7 89 time_t t = mktime(&timeinfo);
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 return t;
<> 144:ef7eb2e8f9f7 92 }
<> 144:ef7eb2e8f9f7 93
<> 144:ef7eb2e8f9f7 94 void rtc_write(time_t t)
<> 144:ef7eb2e8f9f7 95 {
<> 144:ef7eb2e8f9f7 96 if (! rtc_inited) {
<> 144:ef7eb2e8f9f7 97 rtc_init();
<> 144:ef7eb2e8f9f7 98 }
<> 144:ef7eb2e8f9f7 99
<> 144:ef7eb2e8f9f7 100 // Convert timestamp to struct tm
<> 144:ef7eb2e8f9f7 101 struct tm *timeinfo = localtime(&t);
<> 144:ef7eb2e8f9f7 102
<> 144:ef7eb2e8f9f7 103 S_RTC_TIME_DATA_T rtc_datetime;
<> 144:ef7eb2e8f9f7 104
<> 144:ef7eb2e8f9f7 105 // Convert S_RTC_TIME_DATA_T to struct tm
<> 144:ef7eb2e8f9f7 106 rtc_datetime.u32Year = timeinfo->tm_year + YEAR0;
<> 144:ef7eb2e8f9f7 107 rtc_datetime.u32Month = timeinfo->tm_mon + 1;
<> 144:ef7eb2e8f9f7 108 rtc_datetime.u32Day = timeinfo->tm_mday;
<> 144:ef7eb2e8f9f7 109 rtc_datetime.u32DayOfWeek = timeinfo->tm_wday;
<> 144:ef7eb2e8f9f7 110 rtc_datetime.u32Hour = timeinfo->tm_hour;
<> 144:ef7eb2e8f9f7 111 rtc_datetime.u32Minute = timeinfo->tm_min;
<> 144:ef7eb2e8f9f7 112 rtc_datetime.u32Second = timeinfo->tm_sec;
<> 144:ef7eb2e8f9f7 113 rtc_datetime.u32TimeScale = RTC_CLOCK_24;
<> 144:ef7eb2e8f9f7 114
<> 144:ef7eb2e8f9f7 115 // NOTE: Timing issue with write to RTC registers. This delay is empirical, not rational.
<> 144:ef7eb2e8f9f7 116 RTC_SetDateAndTime(&rtc_datetime);
<> 144:ef7eb2e8f9f7 117 //nu_nop(6000);
<> 144:ef7eb2e8f9f7 118 wait_us(100);
<> 144:ef7eb2e8f9f7 119 }
<> 144:ef7eb2e8f9f7 120
<> 144:ef7eb2e8f9f7 121 #endif