Chau Vo / mbed-dev

mbed library sources. Supersedes mbed-src. RTC working even after reset

Fork of mbed-dev by mbed official

common/mbed_rtc_time.cpp@148:161ebc35dc3a, 2016-09-28 (annotated)

Committer:
olympux
Date:
Wed Sep 28 20:59:47 2016 +0000
Revision:
148:161ebc35dc3a
Parent:
144:ef7eb2e8f9f7 
RTC working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 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 #include "rtc_api.h"
<> 144:ef7eb2e8f9f7 17
<> 144:ef7eb2e8f9f7 18 #include <time.h>
<> 144:ef7eb2e8f9f7 19 #include "critical.h"
<> 144:ef7eb2e8f9f7 20 #include "rtc_time.h"
<> 144:ef7eb2e8f9f7 21 #include "us_ticker_api.h"
<> 144:ef7eb2e8f9f7 22 #include "SingletonPtr.h"
<> 144:ef7eb2e8f9f7 23 #include "PlatformMutex.h"
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 static SingletonPtr<PlatformMutex> _mutex;
<> 144:ef7eb2e8f9f7 26
<> 144:ef7eb2e8f9f7 27 #if DEVICE_RTC
<> 144:ef7eb2e8f9f7 28 static void (*_rtc_init)(void) = rtc_init;
<> 144:ef7eb2e8f9f7 29 static int (*_rtc_isenabled)(void) = rtc_isenabled;
<> 144:ef7eb2e8f9f7 30 static time_t (*_rtc_read)(void) = rtc_read;
<> 144:ef7eb2e8f9f7 31 static void (*_rtc_write)(time_t t) = rtc_write;
<> 144:ef7eb2e8f9f7 32 #else
<> 144:ef7eb2e8f9f7 33 static void (*_rtc_init)(void) = NULL;
<> 144:ef7eb2e8f9f7 34 static int (*_rtc_isenabled)(void) = NULL;
<> 144:ef7eb2e8f9f7 35 static time_t (*_rtc_read)(void) = NULL;
<> 144:ef7eb2e8f9f7 36 static void (*_rtc_write)(time_t t) = NULL;
<> 144:ef7eb2e8f9f7 37 #endif
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 40 extern "C" {
<> 144:ef7eb2e8f9f7 41 #endif
<> 144:ef7eb2e8f9f7 42 #if defined (__ICCARM__)
<> 144:ef7eb2e8f9f7 43 time_t __time32(time_t *timer)
<> 144:ef7eb2e8f9f7 44 #else
<> 144:ef7eb2e8f9f7 45 time_t time(time_t *timer)
<> 144:ef7eb2e8f9f7 46 #endif
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 {
<> 144:ef7eb2e8f9f7 49 _mutex->lock();
<> 144:ef7eb2e8f9f7 50 if (_rtc_isenabled != NULL) {
<> 144:ef7eb2e8f9f7 51 if (!(_rtc_isenabled())) {
<> 144:ef7eb2e8f9f7 52 set_time(0);
<> 144:ef7eb2e8f9f7 53 }
<> 144:ef7eb2e8f9f7 54 }
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56 time_t t = 0;
<> 144:ef7eb2e8f9f7 57 if (_rtc_read != NULL) {
<> 144:ef7eb2e8f9f7 58 t = _rtc_read();
<> 144:ef7eb2e8f9f7 59 }
<> 144:ef7eb2e8f9f7 60
<> 144:ef7eb2e8f9f7 61 if (timer != NULL) {
<> 144:ef7eb2e8f9f7 62 *timer = t;
<> 144:ef7eb2e8f9f7 63 }
<> 144:ef7eb2e8f9f7 64 _mutex->unlock();
<> 144:ef7eb2e8f9f7 65 return t;
<> 144:ef7eb2e8f9f7 66 }
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 void set_time(time_t t) {
<> 144:ef7eb2e8f9f7 69 _mutex->lock();
<> 144:ef7eb2e8f9f7 70 if (_rtc_init != NULL) {
<> 144:ef7eb2e8f9f7 71 _rtc_init();
<> 144:ef7eb2e8f9f7 72 }
<> 144:ef7eb2e8f9f7 73 if (_rtc_write != NULL) {
<> 144:ef7eb2e8f9f7 74 _rtc_write(t);
<> 144:ef7eb2e8f9f7 75 }
<> 144:ef7eb2e8f9f7 76 _mutex->unlock();
<> 144:ef7eb2e8f9f7 77 }
<> 144:ef7eb2e8f9f7 78
<> 144:ef7eb2e8f9f7 79 clock_t clock() {
<> 144:ef7eb2e8f9f7 80 _mutex->lock();
<> 144:ef7eb2e8f9f7 81 clock_t t = us_ticker_read();
<> 144:ef7eb2e8f9f7 82 t /= 1000000 / CLOCKS_PER_SEC; // convert to processor time
<> 144:ef7eb2e8f9f7 83 _mutex->unlock();
<> 144:ef7eb2e8f9f7 84 return t;
<> 144:ef7eb2e8f9f7 85 }
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 void attach_rtc(time_t (*read_rtc)(void), void (*write_rtc)(time_t), void (*init_rtc)(void), int (*isenabled_rtc)(void)) {
<> 144:ef7eb2e8f9f7 88 _mutex->lock();
<> 144:ef7eb2e8f9f7 89 _rtc_read = read_rtc;
<> 144:ef7eb2e8f9f7 90 _rtc_write = write_rtc;
<> 144:ef7eb2e8f9f7 91 _rtc_init = init_rtc;
<> 144:ef7eb2e8f9f7 92 _rtc_isenabled = isenabled_rtc;
<> 144:ef7eb2e8f9f7 93 _mutex->unlock();
<> 144:ef7eb2e8f9f7 94 }
<> 144:ef7eb2e8f9f7 95
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97
<> 144:ef7eb2e8f9f7 98 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 99 }
<> 144:ef7eb2e8f9f7 100 #endif