mirror of https://github.com/ARMmbed/mbed-os.git
133 lines
2.9 KiB
C++
133 lines
2.9 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2019 ARM Limited
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* SPDX-License-Identifier: Apache-2.0
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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 "drivers/Timer.h"
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#include "drivers/LowPowerTimer.h"
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#include "hal/ticker_api.h"
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#include "hal/us_ticker_api.h"
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#include "hal/lp_ticker_api.h"
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#include "platform/CriticalSectionLock.h"
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#include "platform/mbed_critical.h"
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#include "platform/mbed_power_mgmt.h"
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using std::milli;
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using std::micro;
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using namespace std::chrono;
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namespace mbed {
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TimerBase::TimerBase(const ticker_data_t *data) : TimerBase(data, !data->interface->runs_in_deep_sleep)
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{
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}
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TimerBase::TimerBase(const ticker_data_t *data, bool lock_deepsleep) : _ticker_data(data), _lock_deepsleep(lock_deepsleep)
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{
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reset();
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}
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TimerBase::~TimerBase()
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{
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if (_running) {
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if (_lock_deepsleep) {
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sleep_manager_unlock_deep_sleep();
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}
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}
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}
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void TimerBase::start()
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{
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CriticalSectionLock lock;
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if (!_running) {
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if (_lock_deepsleep) {
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sleep_manager_lock_deep_sleep();
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}
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_start = _ticker_data.now();
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_running = true;
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}
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}
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void TimerBase::stop()
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{
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CriticalSectionLock lock;
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_time += slicetime();
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if (_running) {
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if (_lock_deepsleep) {
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sleep_manager_unlock_deep_sleep();
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}
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}
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_running = false;
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}
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int TimerBase::read_us() const
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{
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return duration<int, micro>(elapsed_time()).count();
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}
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float TimerBase::read() const
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{
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return duration<float>(elapsed_time()).count();
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}
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int TimerBase::read_ms() const
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{
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return duration_cast<duration<int, milli>>(elapsed_time()).count();
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}
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us_timestamp_t TimerBase::read_high_resolution_us() const
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{
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return duration_cast<duration<us_timestamp_t, micro>>(elapsed_time()).count();
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}
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microseconds TimerBase::elapsed_time() const
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{
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CriticalSectionLock lock;
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return _time + slicetime();
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}
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microseconds TimerBase::slicetime() const
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{
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CriticalSectionLock lock;
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microseconds ret = 0us;
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if (_running) {
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ret = _ticker_data.now() - _start;
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}
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return ret;
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}
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void TimerBase::reset()
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{
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CriticalSectionLock lock;
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_start = _ticker_data.now();
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_time = 0s;
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}
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TimerBase::operator float() const
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{
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return duration<float>(elapsed_time()).count();
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}
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Timer::Timer() : TimerBase(get_us_ticker_data(), true)
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{
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}
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#if DEVICE_LPTICKER
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LowPowerTimer::LowPowerTimer() : TimerBase(get_lp_ticker_data(), false)
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{
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}
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#endif
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} // namespace mbed
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