BA
/
BaBoRo_test2
Backup 1
Diff: mbed-os/drivers/Timer.cpp
- Revision:
- 0:02dd72d1d465
diff -r 000000000000 -r 02dd72d1d465 mbed-os/drivers/Timer.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os/drivers/Timer.cpp Tue Apr 24 11:45:18 2018 +0000 @@ -0,0 +1,110 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "drivers/Timer.h" +#include "hal/ticker_api.h" +#include "hal/us_ticker_api.h" +#include "platform/mbed_critical.h" +#include "hal/lp_ticker_api.h" + +namespace mbed { + +Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()), _lock_deepsleep(true) { + reset(); +} + +Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data), _lock_deepsleep(true) { + reset(); +#if DEVICE_LOWPOWERTIMER + _lock_deepsleep = (data != get_lp_ticker_data()); +#endif +} + +Timer::~Timer() { + core_util_critical_section_enter(); + if (_running) { + if(_lock_deepsleep) { + sleep_manager_unlock_deep_sleep(); + } + } + _running = 0; + core_util_critical_section_exit(); +} + +void Timer::start() { + core_util_critical_section_enter(); + if (!_running) { + if(_lock_deepsleep) { + sleep_manager_lock_deep_sleep(); + } + _start = ticker_read_us(_ticker_data); + _running = 1; + } + core_util_critical_section_exit(); +} + +void Timer::stop() { + core_util_critical_section_enter(); + _time += slicetime(); + if (_running) { + if(_lock_deepsleep) { + sleep_manager_unlock_deep_sleep(); + } + } + _running = 0; + core_util_critical_section_exit(); +} + +int Timer::read_us() { + return read_high_resolution_us(); +} + +float Timer::read() { + return (float)read_us() / 1000000.0f; +} + +int Timer::read_ms() { + return read_high_resolution_us() / 1000; +} + +us_timestamp_t Timer::read_high_resolution_us() { + core_util_critical_section_enter(); + us_timestamp_t time = _time + slicetime(); + core_util_critical_section_exit(); + return time; +} + +us_timestamp_t Timer::slicetime() { + us_timestamp_t ret = 0; + core_util_critical_section_enter(); + if (_running) { + ret = ticker_read_us(_ticker_data) - _start; + } + core_util_critical_section_exit(); + return ret; +} + +void Timer::reset() { + core_util_critical_section_enter(); + _start = ticker_read_us(_ticker_data); + _time = 0; + core_util_critical_section_exit(); +} + +Timer::operator float() { + return read(); +} + +} // namespace mbed