mirror of https://github.com/ARMmbed/mbed-os.git
133 lines
3.0 KiB
C++
133 lines
3.0 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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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 "hal/rtc_api.h"
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#include "platform/mbed_critical.h"
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#include "platform/mbed_rtc_time.h"
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#include "platform/SingletonPtr.h"
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#include "platform/PlatformMutex.h"
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static SingletonPtr<PlatformMutex> _mutex;
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#if DEVICE_RTC
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static void (*_rtc_init)(void) = rtc_init;
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static int (*_rtc_isenabled)(void) = rtc_isenabled;
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static time_t (*_rtc_read)(void) = rtc_read;
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static void (*_rtc_write)(time_t t) = rtc_write;
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#elif DEVICE_LPTICKER
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#include "drivers/LowPowerTimer.h"
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#define US_PER_SEC 1000000
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static SingletonPtr<mbed::LowPowerTimer> _rtc_lp_timer;
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static uint64_t _rtc_lp_base;
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static bool _rtc_enabled;
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static void _rtc_lpticker_init(void)
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{
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_rtc_lp_timer->start();
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_rtc_enabled = true;
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}
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static int _rtc_lpticker_isenabled(void)
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{
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return (_rtc_enabled == true);
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}
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static time_t _rtc_lpticker_read(void)
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{
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return _rtc_lp_timer->read_high_resolution_us() / US_PER_SEC + _rtc_lp_base;
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}
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static void _rtc_lpticker_write(time_t t)
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{
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_rtc_lp_timer->reset();
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_rtc_lp_base = t;
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}
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static void (*_rtc_init)(void) = _rtc_lpticker_init;
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static int (*_rtc_isenabled)(void) = _rtc_lpticker_isenabled;
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static time_t (*_rtc_read)(void) = _rtc_lpticker_read;
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static void (*_rtc_write)(time_t t) = _rtc_lpticker_write;
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#else /* DEVICE_LPTICKER */
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static void (*_rtc_init)(void) = NULL;
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static int (*_rtc_isenabled)(void) = NULL;
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static time_t (*_rtc_read)(void) = NULL;
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static void (*_rtc_write)(time_t t) = NULL;
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#endif /* DEVICE_LPTICKER */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined (__ICCARM__)
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time_t __time32(time_t *timer)
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#else
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time_t time(time_t *timer)
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#endif
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{
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_mutex->lock();
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if (_rtc_isenabled != NULL) {
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if (!(_rtc_isenabled())) {
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set_time(0);
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}
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}
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time_t t = (time_t) -1;
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if (_rtc_read != NULL) {
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t = _rtc_read();
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}
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if (timer != NULL) {
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*timer = t;
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}
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_mutex->unlock();
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return t;
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}
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void set_time(time_t t)
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{
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_mutex->lock();
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if (_rtc_init != NULL) {
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_rtc_init();
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}
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if (_rtc_write != NULL) {
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_rtc_write(t);
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}
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_mutex->unlock();
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}
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void attach_rtc(time_t (*read_rtc)(void), void (*write_rtc)(time_t), void (*init_rtc)(void), int (*isenabled_rtc)(void))
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{
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_mutex->lock();
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_rtc_read = read_rtc;
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_rtc_write = write_rtc;
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_rtc_init = init_rtc;
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_rtc_isenabled = isenabled_rtc;
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_mutex->unlock();
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}
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#ifdef __cplusplus
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}
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#endif
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